# Maintained by Axel Boldt (boldt@math.ucsb.edu) # # This version of the Linux kernel configuration help texts # corresponds to the kernel versions 2.3.x. # # Translations of this file available on the WWW: # # - Japanese, maintained by the JF Project (JF@linux.or.jp), at # http://www.linux.or.jp/JF/JFdocs/Configure.help/ # - Russian, by kaf@linux.nevod.perm.su, at # http://nevod.perm.su/service/linux/doc/kernel/Configure.help # - French, by Tane Pierre (tanep@bigfoot.com), at # http://www.kernelfr.org # - Spanish, by Carlos Perelló Marín (fperllo@ehome.encis.es), at # http://visar.csustan.edu/~carlos/ # - Italian, by Alessandro Rubini (rubini@linux.it), at # ftp://ftp-pavia1.linux.it/pub/linux/Configure.help # - Polish, by Cezar Cichocki (cezar@cs.net.pl), at # http://www.cs.net.pl/~cezar/Kernel # - German, by SuSE, at http://www.suse.de/~ke/kernel . This patch # includes infrastructure to support different languages as well. # # To access a document on the WWW, you need to have a direct Internet # connection and a browser program such as netscape or lynx. If you # only have email access, you can still use FTP and WWW servers: send # an email to mail-server@rtfm.mit.edu with the text # send usenet/news.answers/internet-services/access-via-email # in the body of the message. # # Information about what a kernel is, what it does, how to patch and # compile it and much more is contained in the Kernel-HOWTO, available # at http://www.linuxdoc.org/docs.html#howto . Before you start # compiling, make sure that you have the necessary versions of all # programs and libraries required to compile and run this kernel; they # are listed in the file Documentation/Changes. Make sure to read the # toplevel kernel README file as well. # # Format of this file: descriptionvariablehelp text. If # the question being documented is of type "choice", we list only the # first occurring config variable. The help texts may contain empty # lines, but every non-empty line must be indented two positions. # Order of the help texts does not matter, however, no variable should # be documented twice: if it is, only the first occurrence will be # used by Configure. We try to keep the help texts of related variables # close together. Lines starting with `#' are ignored. To be nice to # menuconfig, limit your line length to 70 characters. Use emacs' # kfill.el to edit and ispell.el to spell check this file or you lose. # # If you add a help text to this file, please try to be as gentle as # possible. Don't use unexplained acronyms and generally write for the # hypothetical ignorant but intelligent user who has just bought a PC, # removed Windows, installed Linux and is now recompiling the kernel # for the first time. Tell them what to do if they're unsure. Technical # information should go in a README in the Documentation directory. # Mention all the relevant READMEs and HOWTOs in the help text. # Repetitions are fine since the help texts are not meant to be read # in sequence. # # All this was shamelessly stolen from several different sources. Many # thanks to all the contributors. Feel free to use these help texts in # your own kernel configuration tools. The texts are copyrighted (c) # 1995-1999 by Axel Boldt and many others and are governed by the GNU # General Public License. Prompt for development and/or incomplete code/drivers CONFIG_EXPERIMENTAL Some of the various things that Linux supports (such as network drivers, filesystems, network protocols, etc.) can be in a state of development where the functionality, stability, or the level of testing is not yet high enough for general use. This is usually known as the "alpha-test" phase amongst developers. If a feature is currently in alpha-test, then the developers usually discourage uninformed widespread use of this feature by the general public to avoid "Why doesn't this work?" type mail messages. However, active testing and use of these systems is welcomed. Just be aware that it may not meet the normal level of reliability or it may fail to work in some special cases. Detailed bug reports from people familiar with the kernel internals are usually welcomed by the developers (before submitting bug reports, please read the documents README, MAINTAINERS, REPORTING_BUGS, Documentation/BUG-HUNTING, and Documentation/oops-tracing.txt in the kernel source). This option will also make obsoleted drivers available. These are drivers that have been replaced by something else, and/or are scheduled to be removed in a future kernel release. Unless you intend to help test and develop a feature or driver that falls into this category, or you have a situation that requires using these features, you should probably say N here, which will cause this configure script to present you with fewer choices. If you say Y here, you will be offered the choice of using features or drivers that are currently considered to be in the alpha-test phase. Symmetric Multi Processing CONFIG_SMP This enables support for systems with more than one CPU. If you have a system with only one CPU, like most personal computers, say N. If you have a system with more than one CPU, say Y. If you say N here, the kernel will run on single and multiprocessor machines, but will use only one CPU of a multiprocessor machine. If you say Y here, the kernel will run on many, but not all, singleprocessor machines. On a singleprocessor machine, the kernel will run faster if you say N here. Note that if you say Y here and choose architecture "586" or "Pentium" under "Processor family", the kernel will not work on 486 architectures. Similarly, multiprocessor kernels for the "PPro" architecture may not work on all Pentium based boards. People using multiprocessor machines who say Y here should also say Y to "Enhanced Real Time Clock Support", below. The "Advanced Power Management" code will be disabled if you say Y here. See also: Documentation/SMP.txt, Documentation/smp.tex, Documentation/smp.txt, and Documentation/IO-APIC.txt. Also see the SMP-FAQ on the WWW at http://www.irisa.fr/prive/mentre/smp-faq/ . If you don't know what to do here, say N. APIC and IO-APIC Support on Uniprocessors CONFIG_X86_UP_IOAPIC This option enables uniprocessor-kernels to switch into IO-APIC mode if there is an IO-APIC in the system. Such a kernel will still boot on IO-APIC-less systems with no slowdown at all. SMP kernels include IO-APIC support unconditionally. Kernel math emulation CONFIG_MATH_EMULATION Linux can emulate a math coprocessor (used for floating point operations) if you don't have one. 486DX and Pentium processors have a math coprocessor built in, 486SX and 386 do not, unless you added a 487DX or 387, respectively. (The messages during boot time can give you some hints here ["man dmesg"].) Everyone needs either a coprocessor or this emulation. If you don't have a math coprocessor, you need to say Y here; if you say Y here even though you have a coprocessor, the coprocessor will be used nevertheless. (This behavior can be changed with the kernel command line option "no387", which comes handy if your coprocessor is broken. Try "man bootparam" or see the documentation of your boot loader (lilo or loadlin) about how to pass options to the kernel at boot time. The lilo procedure is also explained in the SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto .) This means that it is a good idea to say Y here if you intend to use this kernel on different machines. More information about the internals of the Linux math coprocessor emulation can be found in arch/i386/math-emu/README. If you are not sure, say Y; apart from resulting in a 66 KB bigger kernel, it won't hurt. Timer and CPU usage LEDs CONFIG_LEDS If you say Y here, the LEDs on your machine will be used to provide useful information about your current system status. If you are compiling a kernel for a NetWinder or EBSA-285, you will be able to select which LEDs are active using the options below. If you are compiling a kernel for the EBSA-110 however, the red LED will simply flash regularly to indicate that the system is still functional. It is safe to say Y here if you have a CATS system, but the driver will do nothing. Timer LED CONFIG_LEDS_TIMER If you say Y here, one of the system LEDs (the green one on the NetWinder or the amber one on the EBSA285) will flash regularly to indicate that the system is still operational. This is mainly useful to kernel hackers who are debugging unstable kernels. CPU usage LED CONFIG_LEDS_CPU If you say Y here, the red LED will be used to give a good real time indication of CPU usage, by lighting whenever the idle task is not currently executing. Kernel FP software completion (EXPERIMENTAL) CONFIG_MATHEMU This option is required for IEEE compliant floating point arithmetic on the Alpha. The only time you would ever not say Y is to say M in order to debug the code. Say Y unless you know what you are doing. High Memory support CONFIG_NOHIGHMEM If you are compiling a kernel which will never run on a machine with more than 1 Gigabyte total physical RAM, answer "off" here (default choice). Linux can use up to 64 Gigabytes of physical memory on x86 systems. High memory is all the physical RAM that could not be directly mapped by the kernel - ie. 3GB if there is 4GB RAM in the system, 7GB if there is 8GB RAM in the system. If 4 Gigabytes physical RAM or less is used then answer "4GB" here. If more than 4 Gigabytes is used then answer "64GB" here. This selection turns Intel PAE (Physical Address Extension) mode on. PAE implements 3-level paging on IA32 processors. PAE is fully supported by Linux, PAE mode is implemented on all recent Intel processors (PPro and better). NOTE: The "64GB" kernel will not boot CPUs that not support PAE! Normal PC floppy disk support CONFIG_BLK_DEV_FD If you want to use the floppy disk drive(s) of your PC under Linux, say Y. Information about this driver, especially important for IBM Thinkpad users, is contained in drivers/block/README.fd. This file also contains the location of the Floppy driver FAQ as well as location of the fdutils package used to configure additional parameters of the driver at run time. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called floppy.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Support for PowerMac floppy CONFIG_MAC_FLOPPY If you have a SWIM-3 (Super Woz Integrated Machine 3; from Apple) floppy controller, say Y here. Most commonly found in PowerMacs. RAM disk support CONFIG_BLK_DEV_RAM Saying Y here will allow you to use a portion of your RAM memory as a block device, so that you can make filesystems on it, read and write to it and do all the other things that you can do with normal block devices (such as hard drives). It is usually used to load and store a copy of a minimal root file system off of a floppy into RAM during the initial install of Linux. Note that the kernel command line option "ramdisk=XX" is now obsolete. For details, read Documentation/ramdisk.txt. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M and read Documentation/modules.txt. The module will be called rd.o. Most normal users won't need the RAM disk functionality, and can thus say N here. Initial RAM disk (initrd) support CONFIG_BLK_DEV_INITRD The initial RAM disk is a RAM disk that is loaded by the boot loader (loadlin or lilo) and that is mounted as root before the normal boot procedure. It is typically used to load modules needed to mount the "real" root file system, etc. See Documentation/initrd.txt for details. Loop device support CONFIG_BLK_DEV_LOOP Saying Y here will allow you to use a regular file as a block device; you can then create a file system on that block device and mount it just as you would mount other block devices such as hard drive partitions, CDROM drives or floppy drives. This is useful if you want to check an ISO 9660 file system before burning the CD, or if you want to use floppy images without first writing them to floppy. The loop device driver can also be used to "hide" a filesystem in a disk partition, floppy, or regular file, either using encryption (scrambling the data) or steganography (hiding the data in the low bits of, say, a sound file). This is also safe if the file resides on a remote file server. If you want to do this, you will first have to acquire and install a kernel patch from ftp://ftp.replay.com/pub/crypto/linux/all or ftp://verden.pvv.org/pub/linux/kerneli/v2.1/ , and then you need to say Y to this option. Note that alternative ways to use encrypted filesystems are provided by the cfs package, which can be gotten from ftp://ftp.replay.com/pub/crypto/disk/ , and the newer tcfs package, available at http://tcfs.dia.unisa.it/ . You do not need to say Y here if you want to use one of these. However, using cfs requires saying Y to "NFS filesystem support" below while using tcfs requires applying a kernel patch. To use the loop device, you need the losetup utility and a recent version of the mount program, both contained in the util-linux package. The location and current version number of util-linux is contained in the file Documentation/Changes. Note that this loop device has nothing to do with the loopback device used for network connections from the machine to itself. If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called loop.o. Most users will answer N here. Network Block Device support CONFIG_BLK_DEV_NBD Saying Y here will allow your computer to be a client for network block devices, i.e. it will be able to use block devices exported by servers (mount filesystems on them etc.). Communication between client and server works over TCP/IP networking, but to the client program this is hidden: it looks like a regular local file access to a block device special file such as /dev/nd0. Network block devices also allows you to run a block-device in userland (making server and client physically the same computer, communicating using the loopback network device). Read Documentation/nbd.txt for more information, especially about where to find the server code, which runs in user space and does not need special kernel support. Note that this has nothing to do with the network file systems NFS or Coda; you can say N here even if you intend to use NFS or Coda. If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called nbd.o. If unsure, say N. Enhanced IDE/MFM/RLL disk/cdrom/tape/floppy support CONFIG_BLK_DEV_IDE If you say Y here, you will use the full-featured IDE driver to control up to eight IDE interfaces, each being able to serve a "master" and a "slave" device, for a total of up to sixteen IDE disk/cdrom/tape/floppy drives. People with SCSI-only systems can say N here. Useful information about large (>540 MB) IDE disks, multiple interfaces, what to do if IDE devices are not automatically detected, sound card IDE ports, module support, and other topics, is contained in Documentation/ide.txt. For detailed information about hard drives, consult the Disk-HOWTO and the Multi-Disk-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . To fine-tune IDE drive/interface parameters for improved performance, look for the hdparm package at ftp://metalab.unc.edu/pub/Linux/kernel/patches/diskdrives/ . If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt and Documentation/ide.txt. The module will be called ide.o. Do not compile this driver as a module if your root filesystem (the one containing the directory /) is located on an IDE device. If you have one or more IDE drives, say Y or M here. If your system has no IDE drives, or if memory requirements are really tight, you could say N here, and select the "Old hard disk driver" below instead to save about 13 KB of memory in the kernel. Old hard disk (MFM/RLL/IDE) driver CONFIG_BLK_DEV_HD_ONLY There are two drivers for MFM/RLL/IDE hard disks. Most people use the newer enhanced driver, but this old one is still around for two reasons. Some older systems have strange timing problems and seem to work only with the old driver (which itself does not work with some newer systems). The other reason is that the old driver is smaller, since it lacks the enhanced functionality of the new one. This makes it a good choice for systems with very tight memory restrictions, or for systems with only older MFM/RLL/ESDI drives. Choosing the old driver can save 13 KB or so of kernel memory. If you are unsure, then just choose the Enhanced IDE/MFM/RLL driver instead of this one. For more detailed information, read the Disk-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . People with SCSI-only systems can say N here. Use old disk-only driver on primary interface CONFIG_BLK_DEV_HD_IDE There are two drivers for MFM/RLL/IDE disks. Most people use just the new enhanced driver by itself. This option however installs the old hard disk driver to control the primary IDE/disk interface in the system, leaving the new enhanced IDE driver to take care of only the 2nd/3rd/4th IDE interfaces. Doing this will prevent you from having an IDE/ATAPI CDROM or tape drive connected to the primary IDE interface. Choosing this option may be useful for older systems which have MFM/RLL/ESDI controller+drives at the primary port address (0x1f0), along with IDE drives at the secondary/3rd/4th port addresses. Normally, just say N here; you will then use the new driver for all 4 interfaces. People with SCSI-only systems don't need this and can say N here as well. Include IDE/ATA-2 DISK support CONFIG_BLK_DEV_IDEDISK This will include enhanced support for MFM/RLL/IDE hard disks. If you have a MFM/RLL/IDE disk, and there is no special reason to use the old hard disk driver instead, say Y. If you have an SCSI-only system, you can say N here. If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called ide-disk.o. Do not compile this driver as a module if your root filesystem (the one containing the directory /) is located on the IDE disk. If unsure, say Y. Use multi-mode by default CONFIG_IDEDISK_MULTI_MODE If you get this error, try to say Y here: hda: set_multmode: status=0x51 { DriveReady SeekComplete Error } hda: set_multmode: error=0x04 { DriveStatusError } If in doubt, say N. Include IDE/ATAPI CDROM support CONFIG_BLK_DEV_IDECD If you have a CDROM drive using the ATAPI protocol, say Y. ATAPI is a newer protocol used by IDE CDROM and TAPE drives, similar to the SCSI protocol. Most new CDROM drives use ATAPI, including the NEC-260, Mitsumi FX400, Sony 55E, and just about all non-SCSI double(2X) or better speed drives. If you say Y here, the CDROM drive will be identified at boot time along with other IDE devices, as "hdb" or "hdc", or something similar (check the boot messages with dmesg). If this is your only CDROM drive, you can say N to all other CDROM options, but be sure to say Y or M to "ISO 9660 CDROM filesystem support". Read the CDROM-HOWTO, available from http://www.linuxdoc.org/docs.html#howto and the file Documentation/cdrom/ide-cd. Note that older versions of lilo (the Linux boot loader) cannot properly deal with IDE/ATAPI CDROMs, so install lilo-16 or higher, available from ftp://metalab.unc.edu/pub/Linux/system/boot/lilo . If you want to compile the driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called ide-cd.o. Include IDE/ATAPI TAPE support CONFIG_BLK_DEV_IDETAPE If you have an IDE tape drive using the ATAPI protocol, say Y. ATAPI is a newer protocol used by IDE tape and CDROM drives, similar to the SCSI protocol. If you have an SCSI tape drive however, you can say N here. This now includes the OnStream DI-30 tape drive support. Will not work with SCSI protocol, until there is support for the SC-30 and SC-50 versions. If you say Y here, the tape drive will be identified at boot time along with other IDE devices, as "hdb" or "hdc", or something similar, and will be mapped to a character device such as "ht0" (check the boot messages with dmesg). Be sure to consult the drivers/block/ide-tape.c and Documentation/ide.txt files for usage information. If you want to compile the driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called ide-tape.o. Include IDE/ATAPI FLOPPY support CONFIG_BLK_DEV_IDEFLOPPY If you have an IDE floppy drive which uses the ATAPI protocol, answer Y. ATAPI is a newer protocol used by IDE CDROM/tape/floppy drives, similar to the SCSI protocol. The LS-120 and the IDE/ATAPI Iomega ZIP drive are also supported by this driver. (ATAPI PD-CD/CDR drives are not supported by this driver; support for PD-CD/CDR drives is available if you answer Y to "SCSI emulation support", below). If you say Y here, the FLOPPY drive will be identified along with other IDE devices, as "hdb" or "hdc", or something similar (check the boot messages with dmesg). If you want to compile the driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called ide-floppy.o. SCSI emulation support CONFIG_BLK_DEV_IDESCSI This will provide SCSI host adapter emulation for IDE ATAPI devices, and will allow you to use a SCSI device driver instead of a native ATAPI driver. Must pass "hdx=scsi" per devices if you want the native EIDE sub-drivers to skip over the native support. This is required for use of CD-RW's. This is useful if you have an ATAPI device for which no native driver has been written (for example, an ATAPI PD-CD or CDR drive); you can then use this emulation together with an appropriate SCSI device driver. In order to do this, say Y here and to "SCSI support" and "SCSI generic support", below. Note that this option does NOT allow you to attach SCSI devices to a box that doesn't have a SCSI host adapter installed. If both this SCSI emulation and native ATAPI support are compiled into the kernel, the native support will be used. People with SCSI-only systems can say N here. If unsure, say N. ISA-PNP EIDE support CONFIG_BLK_DEV_ISAPNP If you have an ISA EIDE card that is PnP and requires setup first before scanning for devices, say Y here. If unsure, say N. CMD640 chipset bugfix/support CONFIG_BLK_DEV_CMD640 The CMD-Technologies CMD640 IDE chip is used on many common 486 and Pentium motherboards, usually in combination with a "Neptune" or "SiS" chipset. Unfortunately, it has a number of rather nasty design flaws that can cause severe data corruption under many common conditions. Say Y here to include code which tries to automatically detect and correct the problems under Linux. This option also enables access to the secondary IDE ports in some CMD640 based systems. This driver will work automatically in PCI based systems (most new systems have PCI slots). But if your system uses VESA local bus (VLB) instead of PCI, you must also supply a kernel boot parameter to enable the CMD640 bugfix/support: "ide0=cmd640_vlb". (Try "man bootparam" or see the documentation of your boot loader about how to pass options to the kernel. The lilo procedure is also explained in the SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto .) The CMD640 chip is also used on add-in cards by Acculogic, and on the "CSA-6400E PCI to IDE controller" that some people have. For details, read Documentation/ide.txt. People with SCSI-only systems should say N here. If unsure, say Y. CMD640 enhanced support CONFIG_BLK_DEV_CMD640_ENHANCED This option includes support for setting/autotuning PIO modes and prefetch on CMD640 IDE interfaces. For details, read Documentation/ide.txt. If you have a CMD640 IDE interface and your BIOS does not already do this for you, then say Y here. Otherwise say N. RZ1000 chipset bugfix/support CONFIG_BLK_DEV_RZ1000 The PC-Technologies RZ1000 IDE chip is used on many common 486 and Pentium motherboards, usually along with the "Neptune" chipset. Unfortunately, it has a rather nasty design flaw that can cause severe data corruption under many conditions. Say Y here to include code which automatically detects and corrects the problem under Linux. This may slow disk throughput by a few percent, but at least things will operate 100% reliably. People with SCSI-only systems should say N here. If unsure, say Y. Generic PCI IDE chipset support CONFIG_BLK_DEV_IDEPCI Say Y here for PCI systems which use IDE drive(s). This option helps the IDE driver to automatically detect and configure all PCI-based IDE interfaces in your system. People with SCSI-only systems should say N here; if unsure say Y. Generic PCI bus-master DMA support CONFIG_BLK_DEV_IDEDMA_PCI If your PCI system uses IDE drive(s) (as opposed to SCSI, say) and is capable of bus-master DMA operation (most Pentium PCI systems), you will want to say Y here to reduce CPU overhead. You can then use the "hdparm" utility to enable DMA for drives for which it was not enabled automatically. By default, DMA is not enabled automatically for these drives, but you can change that by saying Y to the following question "Use DMA by default when available". You can get the latest version of the hdparm utility from ftp://metalab.unc.edu/pub/Linux/system/hardware/ . Read the comments at the beginning of drivers/block/idedma.c and the file Documentation/ide.txt for more information. It is safe to say Y to this question. Good-Bad DMA Model-Firmware (EXPERIMENTAL) IDEDMA_NEW_DRIVE_LISTINGS If you say Y here, the model and firmware revision of your drive will be compared against a blacklist of buggy drives that claim to be (U)DMA capable but aren't. This is a blanket on/off test with no speed limit options. Straight GNU GCC 2.7.3/2.8.X compilers are known to be safe; whereas, many versions of EGCS have a problem and miscompile if you say Y here. If in doubt, say N. Boot off-board chipsets first support CONFIG_BLK_DEV_OFFBOARD Normally, IDE controllers built into the motherboard (on-board controllers) are assigned to ide0 and ide1 while those on add-in PCI cards (off-board controllers) are relegated to ide2 and ide3. Answering Y here will allow you to reverse the situation, with off-board controllers on ide0/1 and on-board controllers on ide2/3. This can improve the usability of some boot managers such as LILO when booting from a drive on an off-board controller. If you say Y here, and you actually want to reverse the device scan order as explained above, you also need to issue the kernel command line option "pci=reverse". (Try "man bootparam" or see the documentation of your boot loader (lilo or loadlin) about how to pass options to the kernel at boot time. The lilo procedure is also explained in the SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto .) Note that, if you do this, the order of the hd* devices will be rearranged which may require modification of fstab and other files. If in doubt, say N. Use DMA by default when available CONFIG_IDEDMA_PCI_AUTO Prior to kernel version 2.1.112, Linux used to automatically use DMA for IDE drives and chipsets which support it. Due to concerns about a couple of cases where buggy hardware may have caused damage, the default is now to NOT use DMA automatically. To revert to the previous behaviour, say Y to this question. If you suspect your hardware is at all flakey, say N here. Do NOT email the IDE kernel people regarding this issue! It is normally safe to answer Y to this question unless your motherboard uses a VIA VP2 chipset, in which case you should say N. AEC6210 chipset support CONFIG_BLK_DEV_AEC6210 This driver adds up to 4 more EIDE devices sharing a single interrupt. This add-on card is a bootable PCI UDMA controller. In order to get this card to initialize correctly in some cases, you should say Y here, and preferably also to "Use DMA by default when available". Please read the comments at the top of drivers/block/aec6210.c ALI M15x3 chipset support CONFIG_BLK_DEV_ALI15X3 This driver ensures (U)DMA support for ALI 1543 and 1543C, 1535, 1535D onboard chipsets. It also tests for Simplex mode and enables normal dual channel support. If you say Y here, you also need to say Y to "Use DMA by default when available", above. Please read the comments at the top of drivers/block/alim15x3.c If unsure, say N. AMD7409 chipset support (EXPERIMENTAL) CONFIG_BLK_DEV_AMD7409 This driver ensures (U)DMA support for AMD756 Viper chipset. If you say Y here, you also need to say Y to "Use DMA by default when available", above. Please read the comments at the top of drivers/block/amd7409.c If unsure, say N. CMD64X chipset support CONFIG_BLK_DEV_CMD64X Say Y here if you have an IDE controller which uses any of these chipsets, CMD643, CMD646, or CMD648. CMD64X chipset RAID support (EXPERIMENTAL) (WIP) CONFIG_BLK_DEV_CMD64X Work in progress for hardware raid ata-33/66..........rev 7 minimum. Say N for now. CY82C693 chipset support (EXPERIMENTAL) CONFIG_BLK_DEV_CY82C693 This driver adds detection and support for the CY82C693 chipset used on Digital's PC-Alpha 164SX boards. If you say Y here, you need to say Y to "Use DMA by default when available" as well. HPT34X chipset support CONFIG_BLK_DEV_HPT34X This driver adds up to 4 more EIDE devices sharing a single interrupt. The HPT343 chipset in its current form is a non-bootable controller; the HPT345/HPT363 chipset is a bootable (needs BIOS FIX) PCI UDMA controllers. This driver requires dynamic tuning of the chipset during the ide-probe at boot time. It is reported to support DVD II drives, by the manufacturer. HPT34X DMA support (EXPERIMENTAL) CONFIG_BLK_DEV_HPT34X_DMA you need to say Y to "Use DMA by default when available" if you say Y here. Please read the comments at the top of drivers/block/hpt34x.c HPT366 chipset support CONFIG_BLK_DEV_HPT366 This is an Ultra DMA chipset for ATA-66. This driver adds up to 4 more EIDE devices sharing a single interrupt. The HPT366 chipset in its current form is a non-bootable. This driver requires dynamic tuning of the chipset during the ide-probe at boot. It is reported to support DVD II drives, by the manufacturer. Please read the comments at the top of drivers/block/hpt366.c HPT366 Fast Interrupt support (EXPERIMENTAL) (WIP) HPT366_FAST_IRQ_PREDICTION If unsure, say N. HPT366 mode three unsupported (EXPERIMENTAL) (WIP) HPT366_MODE3 This is an undocumented mode that the HA366 can default to in many cases. If unsure, say N. NS87415 support (EXPERIMENTAL) CONFIG_BLK_DEV_NS87415 This driver adds detection and support for the NS87415 chip (used in SPARC64, among others). Please read the comments at the top of drivers/block/ns87415.c. OPTi 82C621 enhanced support (EXPERIMENTAL) CONFIG_BLK_DEV_OPTI621 This is a driver for the OPTi 82C621 EIDE controller. Please read the comments at the top of drivers/block/opti621.c. Intel PIIXn chipsets support CONFIG_BLK_DEV_PIIX This driver adds PIO mode setting and tuning for all PIIX IDE controllers by Intel. Since the BIOS can sometimes improperly tune PIO 0-4 mode settings, this allows dynamic tuning of the chipset via the standard end-user tool 'hdparm'. Please read the comments at the top of drivers/block/piix.c Should also include "PIIXn Tuning support" CONFIG_BLK_DEV_PIIX_TUNING If unsure, say Y. PIIXn Tuning support CONFIG_BLK_DEV_PIIX_TUNING This driver extension adds DMA mode setting and tuning for all PIIX IDE controllers by Intel. Since the BIOS can sometimes improperly set up the device/adapter combination and speed limits, it has become a necessity to back/forward speed devices as needed. Case 430HX/440FX PIIX3 need speed limits to reduce UDMA to DMA mode 2 if the BIOS can not perform this task at initialization. If unsure, say Y. PROMISE PDC20246/PDC20262 support CONFIG_BLK_DEV_PDC202XX Promise Ultra33 or PDC20246 This driver adds up to 4 more EIDE devices sharing a single interrupt. This add-on card is a bootable PCI UDMA controller. Since multiple cards can be installed and there are BIOS ROM problems that happen if the BIOS revisions of all installed cards (three-max) do not match, the driver attempts to do dynamic tuning of the chipset at boot-time for max-speed. Ultra33 BIOS 1.25 or newer is required for more than one card. This card may require that you say Y to "Special UDMA Feature (EXPERIMENTAL)". Promise Ultra66 or PDC20262 This driver adds up to 4 more EIDE devices sharing a single interrupt. This add-on card is a bootable PCI UDMA ATA-66 controller. The driver attempts to dynamic tuning of the chipset at boot-time for max-speed. Note tested limits are UDMA-2. Ultra66 BIOS 1.11 or newer required. If you say Y here, you need to say Y to "Use DMA by default when available" as well. Please read the comments at the top of drivers/block/pdc202xx.c If unsure, say N. Special UDMA Feature PDC202XX_FORCE_BURST_BIT For PDC20246 and PDC20262 Ultra DMA chipsets. Designed originally for PDC20246/Ultra33 that has BIOS setup failures when using 3 or more cards. Please read the comments at the top of drivers/block/pdc202xx.c If unsure, say N. Special Mode Feature (EXPERIMENTAL) PDC202XX_FORCE_MASTER_MODE For PDC20246 and PDC20262 Ultra DMA chipsets. This is reserved for possible Hardware RAID 0,1 for the FastTrak Series. Say N. Winbond SL82c105 support CONFIG_BLK_DEV_SL82C105 If you have a Winbond SL82c105 IDE controller, say Y here to enable special configuration for this chip. This is common on various CHRP motherboards, but could be used elsewhere. If in doubt, say Y. Tekram TRM290 chipset support (EXPERIMENTAL) CONFIG_BLK_DEV_TRM290 This driver adds support for bus master DMA transfers using the Tekram TRM290 PCI IDE chip. Volunteers are needed for further tweaking and development. Please read the comments at the top of drivers/block/trm290.c. VIA82CXXX chipset support (EXPERIMENTAL) CONFIG_BLK_DEV_VIA82CXXX This allows you to to configure your chipset for a better use while running (U)DMA: it will allow you to enable efficiently the second channel dma usage, as it is may not be set by BIOS. It allows you to run a kernel command line at boot time in order to set fifo config. If no command line is provided, it will try to set fifo configuration at its best. It will allow you to get a proc/ide/via display (while running a "cat") provided you enabled "proc" support. Please read the comments at the top of drivers/block/via82cxxx.c If you say Y here, you also need to say Y to "Use DMA by default when available", above. If unsure, say N. Other IDE chipset support CONFIG_IDE_CHIPSETS Say Y here if you want to include enhanced support for various IDE interface chipsets used on motherboards and add-on cards. You can then pick your particular IDE chip from among the following options. This enhanced support may be necessary for Linux to be able to access the 3rd/4th drives in some systems. It may also enable setting of higher speed I/O rates to improve system performance with these chipsets. Most of these also require special kernel boot parameters to actually turn on the support at runtime; you can find a list of these in the file Documentation/ide.txt. People with SCSI-only systems can say N here. Generic 4 drives/port support CONFIG_BLK_DEV_4DRIVES Certain older chipsets, including the Tekram 690CD, use a single set of I/O ports at 0x1f0 to control up to four drives, instead of the customary two drives per port. Support for this can be enabled at runtime using the "ide0=four" kernel boot parameter if you say Y here. ALI M14xx support CONFIG_BLK_DEV_ALI14XX This driver is enabled at runtime using the "ide0=ali14xx" kernel boot parameter. It enables support for the secondary IDE interface of the ALI M1439/1443/1445/1487/1489 chipsets, and permits faster I/O speeds to be set as well. See the files Documentation/ide.txt and drivers/block/ali14xx.c for more info. DTC-2278 support CONFIG_BLK_DEV_DTC2278 This driver is enabled at runtime using the "ide0=dtc2278" kernel boot parameter. It enables support for the secondary IDE interface of the DTC-2278 card, and permits faster I/O speeds to be set as well. See the Documentation/ide.txt and drivers/block/dtc2278.c files for more info. Holtek HT6560B support CONFIG_BLK_DEV_HT6560B This driver is enabled at runtime using the "ide0=ht6560b" kernel boot parameter. It enables support for the secondary IDE interface of the Holtek card, and permits faster I/O speeds to be set as well. See the Documentation/ide.txt and drivers/block/ht6560b.c files for more info. PROMISE DC4030 support (EXPERIMENTAL) CONFIG_BLK_DEV_PDC4030 This driver provides support for the secondary IDE interface and cache of Promise IDE chipsets, e.g. DC4030 and DC5030. This driver is known to incur timeouts/retries during heavy I/O to drives attached to the secondary interface. CDROM and TAPE devices are not supported yet. This driver is enabled at runtime using the "ide0=dc4030" kernel boot parameter. See the Documentation/ide.txt and drivers/block/pdc4030.c files for more info. QDI QD6580 support CONFIG_BLK_DEV_QD6580 This driver is enabled at runtime using the "ide0=qd6580" kernel boot parameter. It permits faster I/O speeds to be set. See the files Documentation/ide.txt and drivers/block/qd6580.c for more info. UMC 8672 support CONFIG_BLK_DEV_UMC8672 This driver is enabled at runtime using the "ide0=umc8672" kernel boot parameter. It enables support for the secondary IDE interface of the UMC-8672, and permits faster I/O speeds to be set as well. See the files Documentation/ide.txt and drivers/block/umc8672.c for more info. PS/2 ESDI hard disk support CONFIG_BLK_DEV_PS2 Say Y here if you have a PS/2 machine with a MCA bus and an ESDI hard disk. If you want to compile the driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called ps2esdi.o. Amiga builtin Gayle IDE interface support CONFIG_BLK_DEV_GAYLE This is the IDE driver for the builtin IDE interface on some Amiga models. It supports both the `A1200 style' (used in A600 and A1200) and `A4000 style' (used in A4000 and A4000T) of the Gayle IDE interface. Say Y if you have such an Amiga model and want to use IDE devices (hard disks, CD-ROM drives, etc.) that are connected to the builtin IDE interface. Falcon IDE interface support CONFIG_BLK_DEV_FALCON_IDE This is the IDE driver for the builtin IDE interface on the Atari Falcon. Say Y if you have a Falcon and want to use IDE devices (hard disks, CD-ROM drives, etc.) that are connected to the builtin IDE interface. Amiga Buddha/Catweasel IDE interface support (EXPERIMENTAL) CONFIG_BLK_DEV_BUDDHA This is the IDE driver for the IDE interfaces on the Buddha and Catweasel expansion boards. It supports up to two interfaces on the Buddha and three on the Catweasel. Say Y if you have a Buddha or Catweasel expansion board and want to use IDE devices (hard disks, CD-ROM drives, etc.) that are connected to one of its IDE interfaces. Amiga IDE Doubler support (EXPERIMENTAL) CONFIG_BLK_DEV_IDEDOUBLER This driver provides support for the so called `IDE doublers' (made by various manufacturers, e.g. Eyetech) that can be connected to the builtin IDE interface of some Amiga models. Using such an IDE doubler, you can connect up to four instead of two IDE devices on the Amiga's builtin IDE interface. Note that the normal Amiga Gayle IDE driver may not work correctly if you have an IDE doubler and don't enable this driver! Say Y if you have an IDE doubler. The driver is enabled at kernel runtime using the "ide=doubler" kernel boot parameter. Support for PowerMac IDE devices (must also enable IDE) CONFIG_BLK_DEV_IDE_PMAC No help for CONFIG_BLK_DEV_IDE_PMAC PowerMac IDE DMA support CONFIG_BLK_DEV_IDEDMA_PMAC No help for CONFIG_BLK_DEV_IDEDMA_PMAC Use DMA by default CONFIG_IDEDMA_PMAC_AUTO No help for CONFIG_IDEDMA_PMAC_AUTO Macintosh Quadra/Powerbook IDE interface support CONFIG_BLK_DEV_MAC_IDE This is the IDE driver for the builtin IDE interface on some m68k Macintosh models. It supports both the `Quadra style' (used in Quadra/ Centris 630 and Performa 588 models) and `Powerbook style' (used in the Powerbook 150 and 190 models) IDE interface. Say Y if you have such an Macintosh model and want to use IDE devices (hard disks, CD-ROM drives, etc.) that are connected to the builtin IDE interface. ICS IDE interface support CONFIG_BLK_DEV_IDE_ICSIDE No help for CONFIG_BLK_DEV_IDE_ICSIDE ICS DMA support CONFIG_BLK_DEV_IDEDMA_ICS No help for CONFIG_BLK_DEV_IDEDMA_ICS Use ICS DMA by default CONFIG_IDEDMA_ICS_AUTO No help for CONFIG_IDEDMA_ICS_AUTO RapIDE interface support CONFIG_BLK_DEV_IDE_RAPIDE No help for CONFIG_BLK_DEV_IDE_RAPIDE XT hard disk support CONFIG_BLK_DEV_XD Very old 8 bit hard disk controllers used in the IBM XT computer will be supported if you say Y here. If you want to compile the driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called xd.o. It's pretty unlikely that you have one of these: say N. Mylex DAC960/DAC1100 PCI RAID Controller support CONFIG_BLK_DEV_DAC960 This driver adds support for the Mylex DAC960, AcceleRAID, and eXtremeRAID PCI RAID controllers. See the file Documentation/README.DAC960 for further information about this driver. If you want to compile the driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called DAC960.o. Parallel port IDE device support CONFIG_PARIDE There are many external CD-ROM and disk devices that connect through your computer's parallel port. Most of them are actually IDE devices using a parallel port IDE adapter. This option enables the PARIDE subsystem which contains drivers for many of these external drives. Read linux/Documentation/paride.txt for more information. If you have said Y to the "Parallel-port support" configuration option, you may share a single port between your printer and other parallel port devices. Answer Y to build PARIDE support into your kernel, or M if you would like to build it as a loadable module. If your parallel port support is in a loadable module, you must build PARIDE as a module. If you built PARIDE support into your kernel, you may still build the individual protocol modules and high-level drivers as loadable modules. If you build this support as a module, it will be called paride.o. To use the PARIDE support, you must say Y or M here and also to at least one high-level driver (e.g. "Parallel port IDE disks", "Parallel port ATAPI CD-ROMs", "Parallel port ATAPI disks" etc.) and to at least one protocol driver (e.g. "ATEN EH-100 protocol", "MicroSolutions backpack protocol", "DataStor Commuter protocol" etc.). Parallel port IDE disks CONFIG_PARIDE_PD This option enables the high-level driver for IDE-type disk devices connected through a parallel port. If you chose to build PARIDE support into your kernel, you may answer Y here to build in the parallel port IDE driver, otherwise you should answer M to build it as a loadable module. The module will be called pd.o. You must also have at least one parallel port protocol driver in your system. Among the devices supported by this driver are the SyQuest EZ-135, EZ-230 and SparQ drives, the Avatar Shark and the backpack hard drives from MicroSolutions. Parallel port ATAPI CD-ROMs CONFIG_PARIDE_PCD This option enables the high-level driver for ATAPI CD-ROM devices connected through a parallel port. If you chose to build PARIDE support into your kernel, you may answer Y here to build in the parallel port ATAPI CD-ROM driver, otherwise you should answer M to build it as a loadable module. The module will be called pcd.o. You must also have at least one parallel port protocol driver in your system. Among the devices supported by this driver are the MicroSolutions backpack CD-ROM drives and the Freecom Power CD. If you have such a CD-ROM drive, you should also say Y or M to "ISO 9660 CDROM filesystem support" below, because that's the filesystem used on CDROMs. Parallel port ATAPI disks CONFIG_PARIDE_PF This option enables the high-level driver for ATAPI disk devices connected through a parallel port. If you chose to build PARIDE support into your kernel, you may answer Y here to build in the parallel port ATAPI disk driver, otherwise you should answer M to build it as a loadable module. The module will be called pf.o. You must also have at least one parallel port protocol driver in your system. Among the devices supported by this driver are the MicroSolutions backpack PD/CD drive and the Imation Superdisk LS-120 drive. Parallel port ATAPI tapes CONFIG_PARIDE_PT This option enables the high-level driver for ATAPI tape devices connected through a parallel port. If you chose to build PARIDE support into your kernel, you may answer Y here to build in the parallel port ATAPI disk driver, otherwise you should answer M to build it as a loadable module. The module will be called pt.o. You must also have at least one parallel port protocol driver in your system. Among the devices supported by this driver is the parallel port version of the HP 5GB drive. Parallel port generic ATAPI devices CONFIG_PARIDE_PG This option enables a special high-level driver for generic ATAPI devices connected through a parallel port. The driver allows user programs, such as cdrecord, to send ATAPI commands directly to a device. If you chose to build PARIDE support into your kernel, you may answer Y here to build in the parallel port generic ATAPI driver, otherwise you should answer M to build it as a loadable module. The module will be called pg.o. You must also have at least one parallel port protocol driver in your system. This driver implements an API loosely related to the generic SCSI driver. See /usr/include/linux/pg.h for details. You can obtain the most recent version of cdrecord from ftp://ftp.fokus.gmd.de/pub/unix/cdrecord/ . Versions 1.6.1a3 and later fully support this driver. ATEN EH-100 protocol CONFIG_PARIDE_ATEN This option enables support for the ATEN EH-100 parallel port IDE protocol. This protocol is used in some inexpensive low performance parallel port kits made in Hong Kong. If you chose to build PARIDE support into your kernel, you may answer Y here to build in the protocol driver, otherwise you should answer M to build it as a loadable module. The module will be called aten.o. You must also have a high-level driver for the type of device that you want to support. MicroSolutions backpack protocol CONFIG_PARIDE_BPCK This option enables support for the MicroSolutions backpack parallel port IDE protocol. If you chose to build PARIDE support into your kernel, you may answer Y here to build in the protocol driver, otherwise you should answer M to build it as a loadable module. The module will be called bpck.o. You must also have a high-level driver for the type of device that you want to support. DataStor Commuter protocol CONFIG_PARIDE_COMM This option enables support for the Commuter parallel port IDE protocol from DataStor. If you chose to build PARIDE support into your kernel, you may answer Y here to build in the protocol driver, otherwise you should answer M to build it as a loadable module. The module will be called comm.o. You must also have a high-level driver for the type of device that you want to support. DataStor EP-2000 protocol CONFIG_PARIDE_DSTR This option enables support for the EP-2000 parallel port IDE protocol from DataStor. If you chose to build PARIDE support into your kernel, you may answer Y here to build in the protocol driver, otherwise you should answer M to build it as a loadable module. The module will be called dstr.o. You must also have a high-level driver for the type of device that you want to support. Shuttle EPAT/EPEZ protocol CONFIG_PARIDE_EPAT This option enables support for the EPAT parallel port IDE protocol. EPAT is a parallel port IDE adapter manufactured by Shuttle Technology and widely used in devices from major vendors such as Hewlett-Packard, SyQuest, Imation and Avatar. If you chose to build PARIDE support into your kernel, you may answer Y here to build in the protocol driver, otherwise you should answer M to build it as a loadable module. The module will be called epat.o. You must also have a high-level driver for the type of device that you want to support. Shuttle EPIA protocol CONFIG_PARIDE_EPIA This option enables support for the (obsolete) EPIA parallel port IDE protocol from Shuttle Technology. This adapter can still be found in some no-name kits. If you chose to build PARIDE support into your kernel, you may answer Y here to build in the protocol driver, otherwise you should answer M to build it as a loadable module. The module will be called epia.o. You must also have a high-level driver for the type of device that you want to support. FIT TD-2000 protocol CONFIG_PARIDE_FIT2 This option enables support for the TD-2000 parallel port IDE protocol from Fidelity International Technology. This is a simple (low speed) adapter that is used in some portable hard drives. If you chose to build PARIDE support into your kernel, you may answer Y here to build in the protocol driver, otherwise you should answer M to build it as a loadable module. The module will be called ktti.o. You must also have a high-level driver for the type of device that you want to support. FIT TD-3000 protocol CONFIG_PARIDE_FIT3 This option enables support for the TD-3000 parallel port IDE protocol from Fidelity International Technology. This protocol is used in newer models of their portable disk, CD-ROM and PD/CD devices. If you chose to build PARIDE support into your kernel, you may answer Y here to build in the protocol driver, otherwise you should answer M to build it as a loadable module. The module will be called fit3.o. You must also have a high-level driver for the type of device that you want to support. Freecom IQ ASIC-2 protocol CONFIG_PARIDE_FRIQ This option enables support for version 2 of the Freecom IQ parallel port IDE adapter. This adapter is used by the Maxell Superdisk drive. If you chose to build PARIDE support into your kernel, you may answer Y here to build in the protocol driver, otherwise you should answer M to build it as a loadable module. The module will be called friq.o. You must also have a high-level driver for the type of device that you want to support. FreeCom power protocol CONFIG_PARIDE_FRPW This option enables support for the Freecom power parallel port IDE protocol. If you chose to build PARIDE support into your kernel, you may answer Y here to build in the protocol driver, otherwise you should answer M to build it as a loadable module. The module will be called frpw.o. You must also have a high-level driver for the type of device that you want to support. KingByte KBIC-951A/971A protocols CONFIG_PARIDE_KBIC This option enables support for the KBIC-951A and KBIC-971A parallel port IDE protocols from KingByte Information Corp. KingByte's adapters appear in many no-name portable disk and CD-ROM products, especially in Europe. If you chose to build PARIDE support into your kernel, you may answer Y here to build in the protocol driver, otherwise you should answer M to build it as a loadable module. The module will be called kbic.o. You must also have a high-level driver for the type of device that you want to support. KT PHd protocol CONFIG_PARIDE_KTTI This option enables support for the "PHd" parallel port IDE protocol from KT Technology. This is a simple (low speed) adapter that is used in some 2.5" portable hard drives. If you chose to build PARIDE support into your kernel, you may answer Y here to build in the protocol driver, otherwise you should answer M to build it as a loadable module. The module will be called ktti.o. You must also have a high-level driver for the type of device that you want to support. OnSpec 90c20 protocol CONFIG_PARIDE_ON20 This option enables support for the (obsolete) 90c20 parallel port IDE protocol from OnSpec (often marketed under the ValuStore brand name). If you chose to build PARIDE support into your kernel, you may answer Y here to build in the protocol driver, otherwise you should answer M to build it as a loadable module. The module will be called on20.o. You must also have a high-level driver for the type of device that you want to support. OnSpec 90c26 protocol CONFIG_PARIDE_ON26 This option enables support for the 90c26 parallel port IDE protocol from OnSpec Electronics (often marketed under the ValuStore brand name). If you chose to build PARIDE support into your kernel, you may answer Y here to build in the protocol driver, otherwise you should answer M to build it as a loadable module. The module will be called on26.o. You must also have a high-level driver for the type of device that you want to support. Multiple devices driver support CONFIG_BLK_DEV_MD This driver lets you combine several hard disk partitions into one logical block device. This can be used to simply append one partition to another one or to combine several redundant hard disks to a RAID1/4/5 device so as to provide protection against hard disk failures. This is called "Software RAID" since the combining of the partitions is done by the kernel. "Hardware RAID" means that the combining is done by a dedicated controller; if you have such a controller, you do not need to say Y here. More information about Software RAID on Linux is contained in the Software-RAID mini-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . There you will also learn where to get the supporting user space utilities raidtools. If unsure, say N. Linear (append) mode CONFIG_MD_LINEAR If you say Y here, then your multiple devices driver will be able to use the so-called linear mode, i.e. it will combine the hard disk partitions by simply appending one to the other. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called linear.o. If unsure, say Y. RAID-0 (striping) mode CONFIG_MD_STRIPED If you say Y here, then your multiple devices driver will be able to use the so-called raid0 mode, i.e. it will combine the hard disk partitions into one logical device in such a fashion as to fill them up evenly, one chunk here and one chunk there. This will increase the throughput rate if the partitions reside on distinct disks. Information about Software RAID on Linux is contained in the Software-RAID mini-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . There you will also learn where to get the supporting user space utilities raidtools. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called raid0.o. If unsure, say Y. RAID-1 (mirroring) mode CONFIG_MD_MIRRORING A RAID-1 set consists of several disk drives which are exact copies of each other. In the event of a mirror failure, the RAID driver will continue to use the operational mirrors in the set, providing an error free MD (multiple device) to the higher levels of the kernel. In a set with N drives, the available space is the capacity of a single drive, and the set protects against a failure of (N - 1) drives. Information about Software RAID on Linux is contained in the Software-RAID mini-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . There you will also learn where to get the supporting user space utilities raidtools. If you want to use such a RAID-1 set, say Y. This code is also available as a module called raid1.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. If unsure, say Y. RAID-4/RAID-5 mode CONFIG_MD_RAID5 A RAID-5 set of N drives with a capacity of C MB per drive provides the capacity of C * (N - 1) drives, and protects against a failure of a single drive. For a given sector (row) number, (N - 1) drives contain data sectors, and one drive contains the parity protection. For a RAID-4 set, the parity blocks are present on a single drive, while a RAID-5 set distributes the parity across the drives in one of the available parity distribution methods. Information about Software RAID on Linux is contained in the Software-RAID mini-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . There you will also learn where to get the supporting user space utilities raidtools. If you want to use such a RAID-4/RAID-5 set, say Y. This code is also available as a module called raid5.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. If unsure, say Y. Boot support (linear, striped) CONFIG_MD_BOOT To boot with an initial linear or striped md device you have to answer Y here. For lilo and loadlin options see the file Documentation/md.txt. Support for Deskstation RPC44 CONFIG_DESKSTATION_RPC44 This is a machine with a R4400 100 MHz CPU. To compile a Linux kernel that runs on these, say Y here. For details about Linux on the MIPS architecture, check out the Linux/MIPS FAQ on the WWW at http://www.linux.sgi.com/. Support for Acer PICA 1 chipset CONFIG_ACER_PICA_61 This is a machine with a R4400 133/150 MHz CPU. To compile a Linux kernel that runs on these, say Y here. For details about Linux on the MIPS architecture, check out the Linux/MIPS FAQ on the WWW at http://www.linux.sgi.com/. Support for Algorithmics P4032 (EXPERIMENTAL) CONFIG_ALGOR_P4032 This is an evaluation board of the British company Algorithmics. The board uses the R4300 and a R5230 CPUs. For more information about this board see http://www.algor.co.uk. Support for BAGET MIPS series CONFIG_BAGET_MIPS This enables support for the Baget, a Russian embedded system. For more details about the Baget see the Linux/MIPS FAQ on http://www.linux.sgi.com. Support for DECstations CONFIG_DECSTATION This enables support for DEC's MIPS based workstations. For details see the Linux/MIPS FAQ on http://www.linux.sgi.com or the DECstation porting pages on http://decstation.unix-ag.org. If you have one of the following DECstation Models you definitely want to choose R4xx0 for the CPU Type: DECstation 5000/50 DECstation 5000/150 DECstation 5000/260 DECsystem 5900/260 otherwise choose R3000. Support for NEC DDB Vrc-5074 CONFIG_DDB5074 This enables support for the VR5000-based NEC DDB Vrc-5074 evaluation board. IDE card support CONFIG_BLK_DEV_IDE_CARDS On Acorn systems, say Y here if you wish to use an IDE interface expansion card. If you do not or are unsure, say N to this. ICS IDE interface CONFIG_BLK_DEV_IDE_ICS On Acorn systems, say Y here if you wish to use the ICS IDE interface card. This is not required for ICS partition support. If you are unsure, say N to this. ADFS partition support CONFIG_BLK_DEV_PART This allows Linux on Acorn systems to determine its partitions in the 'non-ADFS' partition area of the hard disk - usually located after the ADFS partition. You are probably using this system, so you should enable it. Support for Mips Magnum 4000 CONFIG_MIPS_MAGNUM_4000 This is a machine with a R4000 100 MHz CPU. To compile a Linux kernel that runs on these, say Y here. For details about Linux on the MIPS architecture, check out the Linux/MIPS FAQ on the WWW at http://www.linux.sgi.comm/ (To browse the WWW, you need to have access to a machine on the Internet that has a program like lynx or netscape). Support for Olivetti M700 CONFIG_OLIVETTI_M700 This is a machine with a R4000 100 MHz CPU. To compile a Linux kernel that runs on these, say Y here. For details about Linux on the MIPS architecture, check out the Linux/MIPS FAQ on the WWW at http://www.linux.sgi.com/ (To browse the WWW, you need to have access to a machine on the Internet that has a program like lynx or netscape). Support for SGI IP22 CONFIG_SGI_IP22 This are the SGI Indy, Challenge S and Indigo2, as well as certain OEM variants like the Tandem CMN B006S. To compile a Linux kernel that runs on these, say Y here. Support for SGI IP27 This are the SGI Origin 200, Origin 2000 and Onyx 2 Graphics workstations. To compile a Linux kernel that runs on these, say Y here. IP27 N-Mode CONFIG_SGI_SN0_N_MODE The nodes of Origin 200, Origin 2000 and Onyx 2 systems can be configured in either N-Modes which allows for more nodes or M-Mode which allows for more more memory. Your system is most probly running in M-Mode, so you should say N here. MIPS JAZZ onboard SONIC Ethernet support CONFIG_MIPS_JAZZ_SONIC This is the driver for the onboard card of of MIPS Magnum 4000, Acer PICA, Olivetti M700-10 and a few other identical OEM systems. MIPS JAZZ FAS216 SCSI support CONFIG_JAZZ_ESP This is the driver for the onboard SCSI hostadapter of MIPS Magnum 4000, Acer PICA, Olivetti M700-10 and a few other identical OEM systems. CPU type CONFIG_CPU_R3000 Please make shure to pick the right CPU type. Linux/MIPS is not designed to be generic, i.e. Kernels compiled for R3000 CPUs will *not* work on R4000 Machines and vice versa. However, since most the supported Machines have an R4000 (or similar) CPU R4xx0 might be a safe bet. If the resulting Kernel does not work try to recompile with R3000. Compile the kernel into the ECOFF object format CONFIG_ECOFF_KERNEL Oops. How di I get here? Support for large 64-bit configurations CONFIG_MIPS_INSANE_LARGE MIPS R10000 does support a 44 bit / 16TB address space as opposed to previous 64-bit processors which only did only support 40 bit / 1TB. If you need processes of more than 1TB virtual address space activate this. Activating CONFIG_MIPS_INSANE_LARGE results in additional memory usage, so only activate this if you really need. Very few people will need this. Generate little endian code CONFIG_CPU_LITTLE_ENDIAN Some MIPS machines can be configured for either little or big endian byte order. These modes require different kernels. Say Y if your machine is little endian, N if it's a big endian machine. Kernel support for IRIX binaries CONFIG_BINFMT_IRIX If you say Y here, the kernel will support running of IRIX binaries. You will need IRIX libraries for this to work. Networking support CONFIG_NET Unless you really know what you are doing, you should say Y here. The reason is that some programs need kernel networking support even when running on a stand-alone machine that isn't connected to any other computer. If you are upgrading from an older kernel, you should consider updating your networking tools too because changes in the kernel and the tools often go hand in hand. The tools are contained in the package net-tools, the location and version number of which are given in Documentation/Changes. For a general introduction to Linux networking, it is highly recommended to read the NET-3-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . Socket filtering CONFIG_FILTER The Linux Socket Filter is derived from the Berkeley Packet Filter. If you say Y here, user-space programs can attach a filter to any socket and thereby tell the kernel that it should allow or disallow certain types of data to get through the socket. Linux Socket Filtering works on all socket types except TCP for now. See the text file linux/Documentation/networking/filter.txt for more information. If unsure, say N. Network packet filtering CONFIG_NETFILTER Netfilter is a framework for filtering and mangling network packets that pass through your Linux box. The most common use of packet filtering is to run your Linux box as a firewall protecting a local network from the Internet. The type of firewall provided by this kernel support is called a "packet filter", which means that it can reject individual network packets based on type, source, destination etc. The other kind of firewall, a "proxy-based" one, is more secure but more intrusive and more bothersome to set up; it inspects the network traffic much more closely, modifies it and has knowledge about the higher level protocols, which a packet filter lacks. Moreover, proxy-based firewalls often require changes to the programs running on the local clients. Proxy-based firewalls don't need support by the kernel, but they are often combined with a packet filter, which only works if you say Y here. You should also say Y here if you intend to use your Linux box as the gateway to the Internet for a local network of machines without globally valid IP addresses. This is called "masquerading": if one of the computers on your local network wants to send something to the outside, your box can "masquerade" as that computer, i.e. it forwards the traffic to the intended outside destination, but modifies the packets to make it look like they came from the firewall box itself. It works both ways: if the outside host replies, the Linux box will silently forward the traffic to the correct local computer. This way, the computers on your local net are completely invisible to the outside world, even though they can reach the outside and can receive replies. It is even possible to run globally visible servers from within a masqueraded local network using a mechanism called portforwarding. Masquerading is also often called NAT (Network Address Translation). Another use of Netfilter is in transparent proxying: if a machine on the local network tries to connect to an outside host, your Linux box can transparently forward the traffic to a local server, typically a caching proxy server. Various modules exist for netfilter which replace the previous masquerading (ipmasqadm), packet filtering (ipchains), transparent proxying, and portforwarding mechanisms. More information is available from http://netfilter.kernelnotes.org . Make sure to say N to "Fast switching" below if you intend to say Y here, as Fast switching currently bypasses netfilter. Chances are that you should say Y here if you compile a kernel which will run as a router and N for regular hosts. If unsure, say N. SYN flood protection CONFIG_SYN_COOKIES Normal TCP/IP networking is open to an attack known as "SYN flooding". This denial-of-service attack prevents legitimate remote users from being able to connect to your computer during an ongoing attack and requires very little work from the attacker, who can operate from anywhere on the Internet. SYN cookies provide protection against this type of attack. If you say Y here, the TCP/IP stack will use a cryptographic challenge protocol known as "SYN cookies" to enable legitimate users to continue to connect, even when your machine is under attack. There is no need for the legitimate users to change their TCP/IP software; SYN cookies work transparently to them. For technical information about SYN cookies, check out ftp://koobera.math.uic.edu/syncookies.html . If you are SYN flooded, the source address reported by the kernel is likely to have been forged by the attacker; it is only reported as an aid in tracing the packets to their actual source and should not be taken as absolute truth. SYN cookies may prevent correct error reporting on clients when the server is really overloaded. If this happens frequently better turn them off. If you say Y here, note that SYN cookies aren't enabled by default; you can enable them by saying Y to "/proc filesystem support" and "Sysctl support" below and executing the command echo 1 >/proc/sys/net/ipv4/tcp_syncookies at boot time after the proc filesystem has been mounted. If unsure, say Y. Sun floppy controller support CONFIG_BLK_DEV_SUNFD This is support for floppy drives on Sun SPARC workstations. Say Y if you have a floppy drive, otherwise N. Easy. Alpha system type CONFIG_ALPHA_GENERIC This is the system type of your hardware. A "generic" kernel will run on any supported Alpha system. However, if you configure a kernel for your specific system, it will be faster and smaller. To find out what type of Alpha system you have, you may want to check out the Linux/Alpha FAQ, accessible on the WWW from http://www.alphalinux.org . In summary: Alcor/Alpha-XLT AS 600 Alpha-XL XL-233, XL-266 AlphaBook1 Alpha laptop Avanti AS 200, AS 205, AS 250, AS 255, AS 300, AS 400 Cabriolet AlphaPC64, AlphaPCI64 DP264 DP264 EB164 EB164 21164 evaluation board EB64+ EB64+ 21064 evaluation board EB66 EB66 21066 evaluation board EB66+ EB66+ 21066 evaluation board Jensen DECpc 150, DEC 2000 model 300, DEC 2000 model 500 LX164 AlphaPC164-LX Miata Personal Workstation 433a, 433au, 500a, 500au, 600a, or 600au Mikasa AS 1000 Noname AXPpci33, UDB (Multia) Noritake AS 1000A, AS 600A, AS 800 PC164 AlphaPC164 Rawhide AS 1200, AS 4000, AS 4100 Ruffian RPX164-2, AlphaPC164-UX, AlphaPC164-BX SX164 AlphaPC164-SX Sable AS 2000, AS 2100 Takara Takara If you don't know what to do, choose "generic". EV5 CPU daughtercard CONFIG_ALPHA_PRIMO Say Y if you have an AS 1000 5/xxx or an AS 1000A 5/xxx. EV5 CPU(s) CONFIG_ALPHA_GAMMA Say Y if you have an AS 2000 5/xxx or an AS 2100 5/xxx. Using SRM as bootloader CONFIG_ALPHA_SRM There are two different types of booting firmware on Alphas: SRM, which is command line driven, and ARC, which uses menus and arrow keys. Details about the Linux/Alpha booting process are contained in the Linux/Alpha FAQ, accessible on the WWW from http://www.alphalinux.org . The usual way to load Linux on an Alpha machine is to use MILO (a bootloader that lets you pass command line parameters to the kernel just like lilo does for the x86 architecture) which can be loaded either from ARC or can be installed directly as a permanent firmware replacement from floppy (which requires changing a certain jumper on the motherboard). If you want to do either of these, say N here. If MILO doesn't work on your system (true for Jensen motherboards), you can bypass it altogether and boot Linux directly from an SRM console; say Y here in order to do that. Note that you won't be able to boot from an IDE disk using SRM. If unsure, say N. Use SRM PCI setup CONFIG_ALPHA_SRM_SETUP This option controls whether or not the PCI configuration set up by SRM is modified. If you say Y, the existing PCI configuration will be left intact. Non-standard serial port support CONFIG_SERIAL_NONSTANDARD Say Y here if you have any non-standard serial boards -- boards which aren't supported using the standard "dumb" serial driver. This includes intelligent serial boards such as Cyclades, Digiboards, etc. These are usually used for systems that need many serial ports because they serve many terminals or dial-in connections. Note that the answer to this question won't directly affect the kernel: saying N will just cause this configure script to skip all the questions about non-standard serial boards. Most people can say N here. Extended dumb serial driver options CONFIG_SERIAL_EXTENDED If you wish to use any non-standard features of the standard "dumb" driver, say Y here. This includes HUB6 support, shared serial interrupts, special multiport support, support for more than the four COM 1/2/3/4 boards, etc. Note that the answer to this question won't directly affect the kernel: saying N will just cause this configure script to skip all the questions about serial driver options. If unsure, say N. Support more than 4 serial ports CONFIG_SERIAL_MANY_PORTS Say Y here if you have dumb serial boards other than the four standard COM 1/2/3/4 ports. This may happen if you have an AST FourPort, Accent Async, Boca (read the Boca mini-HOWTO, available from http://www.linuxdoc.org/docs.html#howto ), or other custom serial port hardware which acts similar to standard serial port hardware. If you only use the standard COM 1/2/3/4 ports, you can say N here to save some memory. You can also say Y if you have an "intelligent" multiport card such as Cyclades, Digiboards, etc. Support for sharing serial interrupts CONFIG_SERIAL_SHARE_IRQ Some serial boards have hardware support which allows multiple dumb serial ports on the same board to share a single IRQ. To enable support for this in the serial driver, say Y here. Auto detect IRQ on standard ports (unsafe) CONFIG_SERIAL_DETECT_IRQ Say Y here if you want the kernel to try to guess which IRQ to use for your serial port. This is considered unsafe; it is far better to configure the IRQ in a boot script using the setserial command. If unsure, say N. Support special multiport boards CONFIG_SERIAL_MULTIPORT Some multiport serial ports have special ports which are used to signal when there are any serial ports on the board which need servicing. Say Y here to enable the serial driver to take advantage of those special I/O ports. Support for SGI Indy CONFIG_SGI Enable this if you want to compile a kernel for an Silicon Graphics Indy workstation. SGI PROM Console Support CONFIG_SGI_PROM_CONSOLE Enable this if you want to use the PROMs for console I/O. SGI Zilog85C30 serial support CONFIG_SGI_SERIAL If you want to use your SGI's built-in serial ports under Linux, answer Y. SGI Newport Graphics support (EXPERIMENTAL) CONFIG_SGI_NEWPORT_GFX If you have an SGI machine and you want to compile the graphics drivers, say Y here. This will include the code for the /dev/graphics and /dev/gfx drivers into the kernel for supporting virtualized access to your graphics hardware. SGI Newport Console support CONFIG_SGI_NEWPORT_CONSOLE Enable this if you want the console on the Newport aka XL graphics card of your Indy. Most people say Y here. SGI DS1286 RTC support CONFIG_SGI_DS1286 If you say Y here and create a character special file /dev/rtc with major number 10 and minor number 135 using mknod ("man mknod"), you will get access to the real time clock built into your computer. Every SGI has such a clock built in. It reports status information via the file /proc/rtc and its behaviour is set by various ioctls on /dev/rtc. SGI Vino Video For Linux (EXPERIMENTAL) CONFIG_SGI_VIDEO_VINO Support for the SGI Vino Video hardware which is part of the Newport aka XL graphics card. Most people will say N here. Support the Bell Technologies HUB6 card CONFIG_HUB6 Say Y here to enable support in the dumb serial driver to support the HUB6 card. PCMCIA serial device support CONFIG_PCMCIA_SERIAL_CS Say Y here to enable support for 16-bit PCMCIA serial devices, including serial port cards, modems, and the modem functions of multifunction ethernet/modem cards. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called serial_cs.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. If unsure, say N. CardBus serial device support CONFIG_PCMCIA_SERIAL_CB Say Y here to enable support for CardBus serial devices, including the modem functions of multifunction ethernet/modem devices. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called serial_cb.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. If unsure, say N. PCI support CONFIG_PCI Find out whether you have a PCI motherboard. PCI is the name of a bus system, i.e. the way the CPU talks to the other stuff inside your box. Other bus systems are ISA, EISA, Microchannel (MCA) or VESA. If you have PCI, say Y, otherwise N. The PCI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto , contains valuable information about which PCI hardware does work under Linux and which doesn't. PCI access mode CONFIG_PCI_GOBIOS On PCI systems, the BIOS can be used to detect the PCI devices and determine their configuration. However, some old PCI motherboards have BIOS bugs and may crash if this is done. Also, some embedded PCI-based systems don't have any BIOS at all. Linux can also try to detect the PCI hardware directly without using the BIOS. With this option, you can specify how Linux should detect the PCI devices. If you choose "BIOS", the BIOS will be used, if you choose "Direct", the BIOS won't be used, and if you choose "Any", the kernel will try the direct access method and falls back to the BIOS if that doesn't work. If unsure, go with the default. PCI device name database CONFIG_PCI_NAMES By default, the kernel contains a database of all known PCI device names to make the information in /proc/pci, /proc/ioports and similar files comprehensible to the user. This database increases size of the kernel image by about 80KB, but it gets freed after the system boots up, so it doesn't take up kernel memory. Anyway, if you are building an installation floppy or kernel for an embedded system where kernel image size really matters, you can disable this feature and you'll get device ID numbers instead of names. When in doubt, say Y. MCA support CONFIG_MCA MicroChannel Architecture is found in some IBM PS/2 machines and laptops. It is a bus system similar to PCI or ISA. See Documentation/mca.txt (and especially the web page given there) before attempting to build an MCA bus kernel. SGI Visual Workstation support CONFIG_VISWS The SGI Visual Workstation series is an IA32-based workstation based on SGI systems chips with some legacy PC hardware attached. Say Y here to create a kernel to run on the SGI 320 or 540. A kernel compiled for the Visual Workstation will not run on other PC boards and vice versa. See Documentation/sgi-visws.txt for more. SGI Visual Workstation framebuffer support CONFIG_FB_SGIVW SGI Visual Workstation support for framebuffer graphics. I2O support CONFIG_I2O The Intelligent Input/Output (I2O) architecture allows hardware drivers to be split into two parts: an operating system specific module called the OSM and an hardware specific module called the HDM. The OSM can talk to a whole range of HDM's, and ideally the HDM's are not OS dependent. This allows for the same HDM driver to be used under different operating systems if the relevant OSM is in place. In order for this to work, you need to have an I2O interface adapter card in your computer. This card contains a special I/O processor (IOP), thus allowing high speeds since the CPU does not have to deal with I/O. If you say Y here, you will get a choice of interface adapter drivers and OSM's with the following questions. This support is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. You will get modules called i2o_core.o and i20_config.o. If unsure, say N. I2O PCI support CONFIG_I2O_PCI Say Y for support of PCI bus I2O interface adapters. Currently this is the only variety supported, so you should say Y. This support is also available as a module called i2o_pci.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. I2O Block OSM CONFIG_I2O_BLOCK Include support for the I2O Block OSM. The Block OSM presents disk and other structured block devices to the operating system. This support is also available as a module called i2o_block.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. I2O LAN OSM CONFIG_I2O_LAN Include support for the LAN OSM. You will also need to include support for token ring or FDDI if you wish to use token ring or FDDI I2O cards with this driver. This support is also available as a module called i2o_lan.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. I2O SCSI OSM CONFIG_I2O_SCSI Allows direct SCSI access to SCSI devices on a SCSI or FibreChannel I2O controller. You can use both the SCSI and Block OSM together if you wish. This support is also available as a module called i2o_scsi.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. I2O /proc support CONFIG_I2O_PROC If you say Y here and to "/proc filesystem support", you will be able to read I2O related information from the virtual directory /proc/i2o. This support is also available as a module called i2o_proc.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. Plug and Play support CONFIG_PNP Plug and Play (PnP) is a standard for peripherals which allows those peripherals to be configured by software, e.g. assign IRQ's or other parameters. No jumpers on the cards are needed, instead the values are provided to the cards from the BIOS, from the operating system, or using a user-space utility. Say Y here if you would like Linux to configure your Plug and Play devices. You should then also say Y to "ISA Plug and Play support", below. Alternatively, you can configure your PnP devices using the user space utilities contained in the isapnptools package. This support is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. ISA Plug and Play support CONFIG_ISAPNP Say Y here if you would like support for ISA Plug and Play devices. This support is also available as a module called isapnp.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. If unsure, say Y. PCMCIA/CardBus support CONFIG_PCMCIA Include kernel support for PCMCIA and CardBus devices. Because PCMCIA support requires additional components that are not part of the kernel (i.e., the pcmcia-cs package), building PCMCIA into the kernel is generally not recommended unless you have a specific need. If unsure, say N. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). When compiled this way, there will be modules called pcmcia_core.o and ds.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. You will also need David Hinds' pcmcia-cs package (see the file Documentation/Changes for location). For more information, see the PCMCIA-HOWTO. CardBus support CONFIG_CARDBUS There are two types of PCMCIA devices: 16-bit PC Cards, and higher performance 32-bit CardBus devices. Use this option to include support for CardBus devices. If unsure, say Y. i82365/Yenta compatible bridge support CONFIG_I82365 Include support for PCMCIA and CardBus host bridges that are register compatible with the Intel i82365 and/or the Yenta specification: this includes virtually all modern PCMCIA bridges. If unsure, say Y. Databook TCIC host bridge support CONFIG_TCIC Include support for the Databook TCIC family of PCMCIA host bridges. These are only found on a handful of old systems. If unsure, say N. System V IPC CONFIG_SYSVIPC Inter Process Communication is a suite of library functions and system calls which let processes (running programs) synchronize and exchange information. It is generally considered to be a good thing, and some programs won't run unless you say Y here. In particular, if you want to run the DOS emulator dosemu under Linux (read the DOSEMU-HOWTO, available from http://www.linuxdoc.org/docs.html#howto ), you'll need to say Y here. You can find documentation about IPC with "info ipc" and also in section 6.4 of the Linux Programmer's Guide, available from http://www.linuxdoc.org/docs.html#guide . Saying Y here enlarges your kernel by about 18 KB. Just say Y. BSD Process Accounting CONFIG_BSD_PROCESS_ACCT If you say Y here, a user level program will be able to instruct the kernel (via a special system call) to write process accounting information to a file: whenever a process exits, information about that process will be appended to the file by the kernel. The information includes things such as creation time, owning user, command name, memory usage, controlling terminal etc. (the complete list is in the struct acct in include/linux/acct.h). It is up to the user level program to do useful things with this information. This is generally a good idea, so say Y. Sysctl support CONFIG_SYSCTL The sysctl interface provides a means of dynamically changing certain kernel parameters and variables on the fly without requiring a recompile of the kernel or reboot of the system. The primary interface consists of a system call, but if you say Y to "/proc filesystem support", a tree of modifiable sysctl entries will be generated beneath the /proc/sys directory. They are explained in the files in Documentation/sysctl/. Note that enabling this option will enlarge the kernel by at least 8 KB. As it is generally a good thing, you should say Y here unless building a kernel for install/rescue disks or your system is very limited in memory. Kernel core (/proc/kcore) format CONFIG_KCORE_ELF If you enabled support for /proc filesystem then the file /proc/kcore will contain the kernel core image. This can be used in gdb: $ cd /usr/src/linux ; gdb vmlinux /proc/kcore Selecting ELF will make /proc/kcore appear in ELF core format as defined by the Executable and Linking Format specification. Selecting A.OUT will choose the old "a.out" format which may be necessary for some old versions of binutils or on some architectures. This is especially useful if you have compiled the kernel with "-g" option to preserve debugging information. It is mainly used for examining kernel data structures on the live kernel so if you don't understand what this means or are not a kernel hacker, just leave it at its default value ELF. Kernel support for ELF binaries CONFIG_BINFMT_ELF ELF (Executable and Linkable Format) is a format for libraries and executables used across different architectures and operating systems. Saying Y here will enable your kernel to run ELF binaries and enlarge it by about 13 KB. ELF support under Linux has now all but replaced the traditional Linux a.out formats (QMAGIC and ZMAGIC) because it is portable (this does *not* mean that you will be able to run executables from different architectures or operating systems however) and makes building run-time libraries very easy. Many new executables are distributed solely in ELF format. You definitely want to say Y here. Information about ELF is contained in the ELF HOWTO available from http://www.linuxdoc.org/docs.html#howto . If you find that after upgrading from Linux kernel 1.2 and saying Y here, you still can't run any ELF binaries (they just crash), then you'll have to install the newest ELF runtime libraries, including ld.so (check the file Documentation/Changes for location and latest version). If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called binfmt_elf.o. Saying M or N here is dangerous because some crucial programs on your system might be in ELF format. Kernel support for A.OUT binaries CONFIG_BINFMT_AOUT A.out (Assembler.OUTput) is a set of formats for libraries and executables used in the earliest versions of UNIX. Linux used the a.out formats QMAGIC and ZMAGIC until they were replaced with the ELF format. As more and more programs are converted to ELF, the use for a.out will gradually diminish. If you disable this option it will reduce your kernel by one page. This is not much and by itself does not warrant removing support. However its removal is a good idea if you wish to ensure that absolutely none of your programs will use this older executable format. If you don't know what to answer at this point then answer Y. If someone told you "You need a kernel with QMAGIC support" then you'll have to say Y here. You may answer M to compile a.out support as a module and later load the module when you want to use a program or library in a.out format. The module will be called binfmt_aout.o. Saying M or N here is dangerous though, because some crucial programs on your system might still be in A.OUT format. Kernel support for Linux/Intel ELF binaries CONFIG_BINFMT_EM86 Say Y here if you want to be able to execute Linux/Intel ELF binaries just like native Alpha binaries on your Alpha machine. For this to work, you need to have the emulator /usr/bin/em86 in place. You can get the same functionality by saying N here and saying Y to "Kernel support for MISC binaries". You may answer M to compile the emulation support as a module and later load the module when you want to use a Linux/Intel binary. The module will be called binfmt_em86.o. If unsure, say Y. Kernel support for MISC binaries CONFIG_BINFMT_MISC If you say Y here, it will be possible to plug wrapper-driven binary formats into the kernel. You will like this especially when you use programs that need an interpreter to run like Java, Python or Emacs-Lisp. It's also useful if you often run DOS executables under the Linux DOS emulator DOSEMU (read the DOSEMU-HOWTO, available from http://www.linuxdoc.org/docs.html#howto ). Once you have registered such a binary class with the kernel, you can start one of those programs simply by typing in its name at a shell prompt; Linux will automatically feed it to the correct interpreter. You can do other nice things, too. Read the file Documentation/binfmt_misc.txt to learn how to use this feature, and Documentation/java.txt for information about how to include Java support. You must say Y to "proc filesystem support" (CONFIG_PROC_FS) to use this part of the kernel. You may say M here for module support and later load the module when you have use for it; the module is called binfmt_misc.o. If you don't know what to answer at this point, say Y. Solaris binary emulation (EXPERIMENTAL) CONFIG_SOLARIS_EMUL This is experimental code which will enable you to run (many) Solaris binaries on your SPARC Linux machine. This code is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called solaris.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Processor family CONFIG_M386 This is the processor type of your CPU. This information is used for optimizing purposes. In order to compile a kernel that can run on all x86 CPU types (albeit not optimally fast), you can specify "386" here. If you specify one of "486" or "586" or "Pentium" or "PPro", then the kernel will not necessarily run on earlier architectures (e.g. a Pentium optimized kernel will run on a PPro, but not necessarily on a i486). Here are the settings recommended for greatest speed: - "386" for the AMD/Cyrix/Intel 386DX/DXL/SL/SLC/SX, Cyrix/TI 486DLC/DLC2 and UMC 486SX-S. Only "386" kernels will run on a 386 class machine. - "486" for the AMD/Cyrix/IBM/Intel 486DX/DX2/DX4 or SL/SLC/SLC2/SLC3/SX/SX2, AMD/Cyrix 5x86, NexGen Nx586 and UMC U5D or U5S. - "586" for generic Pentium CPUs, possibly lacking the TSC (time stamp counter) register. - "Pentium" for the Intel Pentium/Pentium MMX, AMD K5, K6 and K6-3D. - "PPro" for the Cyrix/IBM/National Semiconductor 6x86MX, MII and Intel Pentium II/Pentium Pro. If you don't know what to do, choose "386". VGA text console CONFIG_VGA_CONSOLE Saying Y here will allow you to use Linux in text mode through a display that complies with the generic VGA standard. Virtually everyone wants that. The program SVGATextMode can be used to utilize SVGA video cards to their full potential in text mode. Download it from ftp://metalab.unc.edu/pub/Linux/utils/console . Say Y. Video mode selection support CONFIG_VIDEO_SELECT This enables support for text mode selection on kernel startup. If you want to take advantage of some high-resolution text mode your card's BIOS offers, but the traditional Linux utilities like SVGATextMode don't, you can say Y here and set the mode using the "vga=" option from your boot loader (lilo or loadlin) or set "vga=ask" which brings up a video mode menu on kernel startup. (Try "man bootparam" or see the documentation of your boot loader about how to pass options to the kernel. The lilo procedure is also explained in the SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto .) Read the file Documentation/svga.txt for more information about the Video mode selection support. If unsure, say N. Support for frame buffer devices (EXPERIMENTAL) CONFIG_FB The frame buffer device provides an abstraction for the graphics hardware. It represents the frame buffer of some video hardware and allows application software to access the graphics hardware through a well-defined interface, so the software doesn't need to know anything about the low-level (hardware register) stuff. Frame buffer devices work identically across the different architectures supported by Linux and make the implementation of application programs easier and more portable; at this point, an X server exists which uses the frame buffer device exclusively. On several non-X86 architectures, the frame buffer device is the only way to use the graphics hardware. The device is accessed through special device nodes, usually located in the /dev directory, i.e. /dev/fb*. You need an utility program called fbset to make full use of frame buffer devices. Please read Documentation/fb/framebuffer.txt and the Framebuffer-HOWTO at http://www.tahallah.demon.co.uk/programming/prog.html for more information. Say Y here and to the driver for your graphics board below if you are compiling a kernel for a non-x86 architecture. If you are compiling for the x86 architecture, you can say Y if you want to play with it, but it is not essential. Please note that running graphical applications that directly touch the hardware (e.g. an accelerated X server) and that are not frame buffer device-aware may cause unexpected results. If unsure, say N. Acorn VIDC support CONFIG_FB_ACORN This is the frame buffer device driver for the Acorn VIDC graphics chipset. Apollo frame buffer device CONFIG_FB_APOLLO This is the frame buffer device driver for the monochrome graphics hardware found in some Apollo workstations. Amiga native chipset support CONFIG_FB_AMIGA This is the frame buffer device driver for the builtin graphics chipset found in Amigas. Amiga OCS chipset support CONFIG_FB_AMIGA_OCS This enables support for the original Agnus and Denise video chips, found in the Amiga 1000 and most A500's and A2000's. If you intend to run Linux on any of these systems, say Y; otherwise say N. Amiga ECS chipset support CONFIG_FB_AMIGA_ECS This enables support for the Enhanced Chip Set, found in later A500's, later A2000's, the A600, the A3000, the A3000T and CDTV. If you intend to run Linux on any of these systems, say Y; otherwise say N. Amiga AGA chipset support CONFIG_FB_AMIGA_AGA This enables support for the Advanced Graphics Architecture (also known as the AGA or AA) Chip Set, found in the A1200, A4000, A4000T and CD32. If you intend to run Linux on any of these systems, say Y; otherwise say N. Amiga CyberVision support CONFIG_FB_CYBER This enables support for the Cybervision 64 graphics card from Phase5. Please note that its use is not all that intuitive (i.e. if you have any questions, be sure to ask!). Say N unless you have a Cybervision 64 or plan to get one before you next recompile the kernel. Please note that this driver DOES NOT support the Cybervision 64 3D card, as they use incompatible video chips. Amiga CyberVision3D support (EXPERIMENTAL) CONFIG_FB_VIRGE This enables support for the Cybervision 64/3D graphics card from Phase5. Please note that its use is not all that intuitive (i.e. if you have any questions, be sure to ask!). Say N unless you have a Cybervision 64/3D or plan to get one before you next recompile the kernel. Please note that this driver DOES NOT support the older Cybervision 64 card, as they use incompatible video chips. Amiga RetinaZ3 support (EXPERIMENTAL) CONFIG_FB_RETINAZ3 This enables support for the Retina Z3 graphics card. Say N unless you have a Retina Z3 or plan to get one before you next recompile the kernel. Cirrus Logic generic driver (EXPERIMENTAL) CONFIG_FB_CLGEN This enables support for Cirrus Logic GD542x/543x based boards on Amiga: SD64, Piccolo, Picasso II/II+, Picasso IV, or EGS Spectrum. If you have a PCI-based system, this enables support for these chips: GD-543x, GD-544x, GD-5480. Please read the file Documentation/fb/clgenfb.txt. Say N unless you have such a graphics board or plan to get one before you next recompile the kernel. Permedia2 support (EXPERIMENTAL) CONFIG_FB_PM2 Say Y here if this is your graphics board. Apollo support CONFIG_APOLLO Say Y here if you want to run Linux on an MC680x0-based Apollo Domain workstation such as the DN3500. Apollo 3c505 support CONFIG_APOLLO_ELPLUS Say Y or M here if your Apollo has a 3Com 3c505 ISA Ethernet card. If you don't have one made for Apollos, you can use one from a PC, except that your Apollo won't be able to boot from it (because the code in the ROM will be for a PC). Atari native chipset support CONFIG_FB_ATARI This is the frame buffer device driver for the builtin graphics chipset found in Ataris. Open Firmware frame buffer device support CONFIG_FB_OF Say Y if you want support with Open Firmware for your graphics board. S3 Trio frame buffer device support CONFIG_FB_S3TRIO If you have a S3 Trio say Y. Say N for S3 Virge. ATI Mach64 display support (EXPERIMENTAL) CONFIG_FB_ATY This driver supports graphics boards with the ATI Mach64 chips. Say Y if you have such a graphics board. The driver is also available as a module ( = code which can be inserted and removed from the running kernel whenever you want). The module will be called atyfb.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. ATI Rage128 display support (EXPERIMENTAL) CONFIG_FB_ATY128 This driver supports graphics boards with the ATI Rage128 chips. Say Y if you have such a graphics board. The driver is also available as a module ( = code which can be inserted and removed from the running kernel whenever you want). The module will be called aty128fb.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. PowerMac "control" frame buffer device support CONFIG_FB_CONTROL This driver supports a frame buffer for the graphics adapter in the Power Macintosh 7300 and others. PowerMac "platinum" frame buffer device support CONFIG_FB_PLATINUM This driver supports a frame buffer for the "platinum" graphics adapter in some Power Macintoshes. PowerMac "valkyrie" frame buffer device support CONFIG_FB_VALKYRIE This driver supports a frame buffer for the "valkyrie" graphics adapter in some Power Macintoshes. Chips 65550 display support CONFIG_FB_CT65550 This is the frame buffer device driver for the Chips & Technologies 65550 graphics chip in PowerBooks. Mac frame buffer device CONFIG_FB_MAC This is the frame buffer device driver for the graphics hardware in m68k Macintoshes. HP300 frame buffer device CONFIG_FB_HP300 This is the frame buffer device driver for the Topcat graphics hardware found in HP300 workstations. TGA frame buffer support CONFIG_FB_TGA This is the frame buffer device driver for generic TGA graphic cards. Say Y if you have one of those. VESA VGA graphics console CONFIG_FB_VESA This is the frame buffer device driver for generic VESA 2.0 compliant graphic cards. The older VESA 1.2 cards are not supported. You will get a boot time penguin logo at no additional cost. Please read Documentation/fb/vesafb.txt. If unsure, say Y. VGA 16-color graphics console CONFIG_FB_VGA16 This is the frame buffer device driver for VGA 16 color graphic cards. Say Y if you have such a card. This code is also available as a module. If you want to compile it as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called vga16fb.o. Backward compatibility mode for Xpmac CONFIG_FB_COMPAT_XPMAC If you use the Xpmac X server (common with mklinux), you'll need to say Y here to use X. You should consider changing to XFree86 which includes a server that supports the frame buffer device directly (XF68_FBDev). Matrox unified accelerated driver (EXPERIMENTAL) CONFIG_FB_MATROX Say Y here if you have Matrox Millennium, Matrox Millennium II, Matrox Mystique, Matrox Mystique 220, Matrox Productiva G100, Matrox Mystique G200, Matrox Millennium G200 or Matrox Marvel G200 video card in your box. At this time, support for the G100, Mystique G200 and Marvel G200 is untested. This driver is also available as a module ( = code which can be inserted and removed from the running kernel whenever you want). The module will be called matroxfb.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. You can pass several parameters to the driver at boot time or at module load time. The parameters look like "video=matrox:XXX", where the meaning of XXX can be found at the end of the main source file (drivers/video/matroxfb.c). Please see the file Documentation/fb/matroxfb.txt. Matrox Millennium support CONFIG_FB_MATROX_MILLENIUM Say Y here if you have a Matrox Millennium or Matrox Millennium II video card. If you select "Advanced lowlevel driver options" below, you should check 4 bpp packed pixel, 8 bpp packed pixel, 16 bpp packed pixel, 24 bpp packed pixel and 32 bpp packed pixel. You can also use font widths different from 8. Matrox Mystique support CONFIG_FB_MATROX_MYSTIQUE Say Y here if you have a Matrox Mystique or Matrox Mystique 220 video card. If you select "Advanced lowlevel driver options" below, you should check 8 bpp packed pixel, 16 bpp packed pixel, 24 bpp packed pixel and 32 bpp packed pixel. You can also use font widths different from 8. Matrox G100/G200/G400 support CONFIG_FB_MATROX_G100 Say Y here if you have a Matrox Productiva G100, Matrox Mystique G200, Matrox Marvel G200 or Matrox Millennium G200 video card. If you select "Advanced lowlevel driver options", you should check 8 bpp packed pixel, 16 bpp packed pixel, 24 bpp packed pixel and 32 bpp packed pixel. You can also use font widths different from 8. Matrox unified driver multihead support CONFIG_FB_MATROX_MULTIHEAD Say Y here if you have more than one (supported) Matrox device in your computer and you want to use all of them. If you have only one device, you should say N because the driver compiled with Y is larger and a bit slower, especially on ia32 (ix86). If you said M to "Matrox unified accelerated driver" and N here, you will still be able to use several Matrox devices simultaneously. This is slightly faster but uses 40 KB of kernel memory per Matrox card. You do this by inserting several instances of the module matroxfb.o into the kernel with insmod, supplying the parameter "dev=N" where N is 0, 1, etc. for the different Matrox devices. MDA text console (dual-headed) CONFIG_MDA_CONSOLE Say Y here if you have an old MDA or monochrome Hercules graphics adapter in your system acting as a second head ( = video card). You will then be able to use two monitors with your Linux system. Do not say Y here if your MDA card is the primary card in your system; the normal VGA driver will handle it. This driver is also available as a module ( = code which can be inserted and removed from the running kernel whenever you want). The module will be called mdacon.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. If unsure, say N. SBUS and UPA frame buffers CONFIG_FB_SBUS Say Y if you want support for SBUS or UPA based frame buffer device. Creator/Creator3D support CONFIG_FB_CREATOR This is the frame buffer device driver for the Creator and Creator3D graphics boards. CGsix (GX,TurboGX) support CONFIG_FB_CGSIX This is the frame buffer device driver for the CGsix (GX, TurboGX) frame buffer. BWtwo support CONFIG_FB_BWTWO This is the frame buffer device driver for the BWtwo frame buffer. CGthree support CONFIG_FB_CGTHREE This is the frame buffer device driver for the CGthree frame buffer. TCX (SS4/SS5 only) support CONFIG_FB_TCX This is the frame buffer device driver for the TCX 24/8bit frame buffer. Virtual Frame Buffer support (ONLY FOR TESTING!) CONFIG_FB_VIRTUAL This is a `virtual' frame buffer device. It operates on a chunk of unswapable kernel memory instead of on the memory of a graphics board. This means you cannot see any output sent to this frame buffer device, while it does consume precious memory. The main use of this frame buffer device is testing and debugging the frame buffer subsystem. Do NOT enable it for normal systems! To protect the innocent, it has to be enabled explicitly at boot time using the kernel option `video=vfb:'. This driver is also available as a module ( = code which can be inserted and removed from the running kernel whenever you want). The module will be called vfb.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. If unsure, say N. Advanced low level driver options CONFIG_FBCON_ADVANCED The frame buffer console uses character drawing routines that are tailored to the specific organization of pixels in the memory of your graphics hardware. These are called the low level frame buffer console drivers. Note that they are used for text console output only; they are NOT needed for graphical applications. If you say N here, the needed low level drivers are automatically enabled, depending on what frame buffer devices you selected above. This is recommended for most users. If you say Y here, you have more fine-grained control over which low level drivers are enabled. You can e.g. leave out low level drivers for color depths you do not intend to use for text consoles. Low level frame buffer console drivers can be modules ( = code which can be inserted and removed from the running kernel whenever you want). The modules will be called fbcon-*.o. If you want to compile (some of) them as modules, read Documentation/modules.txt. If unsure, say N. Monochrome support CONFIG_FBCON_MFB This is the low level frame buffer console driver for monochrome (2 colors) packed pixels. 2 bpp packed pixels support CONFIG_FBCON_CFB2 This is the low level frame buffer console driver for 2 bits per pixel (4 colors) packed pixels. 4 bpp packed pixels support CONFIG_FBCON_CFB4 This is the low level frame buffer console driver for 4 bits per pixel (16 colors) packed pixels. 8 bpp packed pixels support CONFIG_FBCON_CFB8 This is the low level frame buffer console driver for 8 bits per pixel (256 colors) packed pixels. 16 bpp packed pixels support CONFIG_FBCON_CFB16 This is the low level frame buffer console driver for 15 or 16 bits per pixel (32K or 64K colors, also known as `hicolor') packed pixels. 24 bpp packed pixels support CONFIG_FBCON_CFB24 This is the low level frame buffer console driver for 24 bits per pixel (16M colors, also known as `truecolor') packed pixels. It is NOT for `sparse' 32 bits per pixel mode. 32 bpp packed pixels support CONFIG_FBCON_CFB32 This is the low level frame buffer console driver for 32 bits per pixel (16M colors, also known as `truecolor') sparse packed pixels. Amiga bitplanes support CONFIG_FBCON_AFB This is the low level frame buffer console driver for 1 to 8 bitplanes (2 to 256 colors) on Amiga. Amiga interleaved bitplanes support CONFIG_FBCON_ILBM This is the low level frame buffer console driver for 1 to 8 interleaved bitplanes (2 to 256 colors) on Amiga. Atari interleaved bitplanes (2 planes) support CONFIG_FBCON_IPLAN2P2 This is the low level frame buffer console driver for 2 interleaved bitplanes (4 colors) on Atari. Atari interleaved bitplanes (4 planes) support CONFIG_FBCON_IPLAN2P4 This is the low level frame buffer console driver for 4 interleaved bitplanes (16 colors) on Atari. Atari interleaved bitplanes (8 planes) support CONFIG_FBCON_IPLAN2P8 This is the low level frame buffer console driver for 8 interleaved bitplanes (256 colors) on Atari. Mac variable bpp packed pixels support CONFIG_FBCON_MAC This is the low level frame buffer console driver for 1/2/4/8/16/32 bits per pixel packed pixels on Mac. It supports variable font widths for low resolution screens. #VGA 16-color planar support #CONFIG_FBCON_VGA_PLANES ### ###What is this? ### VGA characters/attributes support CONFIG_FBCON_VGA This is the low level frame buffer console driver for VGA text mode; it is used by frame buffer device drivers that support VGA text mode. Parallel-port support CONFIG_PARPORT If you want to use devices connected to your machine's parallel port (the connector at the computer with 25 holes), e.g. printer, ZIP drive, PLIP link (Parallel Line Internet Protocol is mainly used to create a mini network by connecting the parallel ports of two local machines) etc., then you need to say Y here; please read Documentation/parport.txt and drivers/parport/BUGS-parport. For extensive information about drivers for many devices attaching to the parallel port see http://www.torque.net/linux-pp.html on the WWW. It is possible to share a single parallel port among several devices and it is safe to compile all the corresponding drivers into the kernel. If you want to compile parallel port support as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called parport.o. If you have more than one parallel port and want to specify which port and IRQ to be used by this driver at module load time, take a look at Documentation/networking/parport.txt. If unsure, say Y. PC-style hardware CONFIG_PARPORT_PC You should say Y here if you have a PC-style parallel port. All IBM PC compatible computers and some Alphas have PC-style parallel ports. This code is also available as a module. If you want to compile it as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called parport_pc.o. If unsure, say Y. Use FIFO/DMA if available CONFIG_PARPORT_PC_FIFO Many parallel port chipsets provide hardware that can speed up printing. Say Y here if you want to take advantage of that. As well as actually having a FIFO, or DMA capability, the kernel will need to know which IRQ the parallel port has. By default, parallel port interrupts will not be used, and so neither will the FIFO. See Documentation/parport.txt to find out how to specify which IRQ/DMA to use. Support for PCMCIA management for PC-style ports CONFIG_PARPORT_PC_PCMCIA Say Y here if you need PCMCIA support for your PC-style parallel ports. If unsure, say N. Support foreign hardware CONFIG_PARPORT_OTHER Say Y here if you want to be able to load driver modules to support other non-standard types of parallel ports. This causes a performance loss, so most people say N. Sun Ultra/AX-style hardware CONFIG_PARPORT_AX Say Y here if you need support for the parallel port hardware on Sun Ultra/AX machines. This code is also available as a module (say M), called parport_ax.o. If in doubt, saying N is the safe plan. IEEE1284 transfer modes CONFIG_PARPORT_1284 If you have a printer that supports status readback or device ID, or want to use a device that uses enhanced parallel port transfer modes such as EPP and ECP, say Y here to enable advanced IEEE 1284 transfer modes. Also say Y if you want device ID information to appear in /proc/sys/dev/parport/*/autoprobe*. It is safe to say N. Enable loadable module support CONFIG_MODULES Kernel modules are small pieces of compiled code which can be inserted in or removed from the running kernel, using the programs insmod and rmmod. This is described in the file Documentation/modules.txt, including the fact that you have to say "make modules" in order to compile the modules that you chose during kernel configuration. Modules can be device drivers, file systems, binary executable formats, and so on. If you think that you may want to make use of modules with this kernel in the future, then say Y here. If unsure, say Y. Set version information on all symbols for modules CONFIG_MODVERSIONS Usually, modules have to be recompiled whenever you switch to a new kernel. Saying Y here makes it possible, and safe, to use the same modules even after compiling a new kernel; this requires the program modprobe. All the software needed for module support is in the modutils package (check the file Documentation/Changes for location and latest version). NOTE: if you say Y here but don't have the program genksyms (which is also contained in the above mentioned modutils package), then the building of your kernel will fail. If you are going to use modules that are generated from non-kernel sources, you would benefit from this option. Otherwise it's not that important. So, N ought to be a safe bet. Kernel module loader support CONFIG_KMOD Normally when you have selected some drivers and/or filesystems to be created as loadable modules, you also have the responsibility to load the corresponding modules (using the programs insmod or modprobe) before you can use them. If you say Y here however, the kernel will be able to load modules for itself: when a part of the kernel needs a module, it runs modprobe with the appropriate arguments, thereby loading the module if it is available. (This is a replacement for kerneld.) Say Y here and read about configuring it in Documentation/kmod.txt. ARP daemon support (EXPERIMENTAL) CONFIG_ARPD Normally, the kernel maintains an internal cache which maps IP addresses to hardware addresses on the local network, so that Ethernet/Token Ring/ etc. frames are sent to the proper address on the physical networking layer. For small networks having a few hundred directly connected hosts or less, keeping this address resolution (ARP) cache inside the kernel works well. However, maintaining an internal ARP cache does not work well for very large switched networks, and will use a lot of kernel memory if TCP/IP connections are made to many machines on the network. If you say Y here, the kernel's internal ARP cache will never grow to more than 256 entries (the oldest entries are expired in a LIFO manner) and communication will be attempted with the user space ARP daemon arpd. Arpd then answers the address resolution request either from its own cache or by asking the net. This code is experimental and also obsolete. If you want to use it, you need to find a version of the daemon arpd on the net somewhere, and you should also say Y to "Kernel/User network link driver", below. If unsure, say N. TCP/IP networking CONFIG_INET These are the protocols used on the Internet and on most local Ethernets. It is highly recommended to say Y here (this will enlarge your kernel by about 144 KB), since some programs (e.g. the X window system) use TCP/IP even if your machine is not connected to any other computer. You will get the so-called loopback device which allows you to ping yourself (great fun, that!). For an excellent introduction to Linux networking, please read the NET-3-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This option is also necessary if you want to use the full power of term (term is a program which gives you almost full Internet connectivity if you have a regular dial up shell account on some Internet connected Unix computer; for more information, read http://www.bart.nl/~patrickr/term-howto/Term-HOWTO.html ). If you say Y here and also to "/proc filesystem support" and "Sysctl support" below, you can change various aspects of the behavior of the TCP/IP code by writing to the (virtual) files in /proc/sys/net/ipv4/*; the options are explained in the file Documentation/Networking/ip-sysctl.txt. Short answer: say Y. IP: multicasting CONFIG_IP_MULTICAST This is code for addressing several networked computers at once, enlarging your kernel by about 2 kB. You need multicasting if you intend to participate in the MBONE, a high bandwidth network on top of the Internet which carries audio and video broadcasts. More information about the MBONE is on the WWW at http://www-itg.lbl.gov/mbone/ . Information about the multicast capabilities of the various network cards is contained in Documentation/networking/multicast.txt. For most people, it's safe to say N. IP: advanced router CONFIG_IP_ADVANCED_ROUTER If you intend to run your Linux box mostly as a router, i.e. as a computer that forwards and redistributes network packets, say Y; you will then be presented with several options that allow more precise control about the routing process. The answer to this question won't directly affect the kernel: answering N will just cause this configure script to skip all the questions about advanced routing. Note that your box can only act as a router if you enable IP forwarding in your kernel; you can do that by saying Y to "/proc filesystem support" and "Sysctl support" below and executing the line echo "1" > /proc/sys/net/ipv4/ip_forward at boot time after the /proc filesystem has been mounted. If you turn on IP forwarding, you will also get the rp_filter, which automatically rejects incoming packets if the routing table entry for their source address doesn't match the network interface they're arriving on. This has security advantages because it prevents the so-called IP spoofing, however it can pose problems if you use asymmetric routing (packets from you to a host take a different path than packets from that host to you) or if you operate a non-routing host which has several IP addresses on different interfaces. To turn rp_filter off use: echo 0 > /proc/sys/net/ipv4/conf//rp_filter or echo 0 > /proc/sys/net/ipv4/conf/all/rp_filter If unsure, say N here. IP: policy routing CONFIG_IP_MULTIPLE_TABLES Normally, a router decides what to do with a received packet based solely on the packet's final destination address. If you say Y here, the Linux router will also be able to take the packet's source address into account. Furthermore, if you also say Y to "IP: use TOS value as routing key" below, the TOS (Type-Of-Service) field of the packet can be used for routing decisions as well. In addition, if you say Y here and to "IP: fast network address translation" below, the router will also be able to modify source and destination addresses of forwarded packets. If you are interested in this, please see the preliminary documentation at http://www.compendium.com.ar/policy-routing.txt and ftp://post.tepkom.ru/pub/vol2/Linux/docs/advanced-routing.tex . You will need supporting software from ftp://ftp.inr.ac.ru/ip-routing/ If unsure, say N. IP: equal cost multipath CONFIG_IP_ROUTE_MULTIPATH Normally, the routing tables specify a single action to be taken in a deterministic manner for a given packet. If you say Y here however, it becomes possible to attach several actions to a packet pattern, in effect specifying several alternative paths to travel for those packets. The router considers all these paths to be of equal "cost" and chooses one of them in a non-deterministic fashion if a matching packet arrives. IP: use TOS value as routing key CONFIG_IP_ROUTE_TOS The header of every IP packet carries a TOS (Type of Service) value with which the packet requests a certain treatment, e.g. low latency (for interactive traffic), high throughput, or high reliability. If you say Y here, you will be able to specify different routes for packets with different TOS values. IP: use FWMARK value as routing key CONFIG_IP_ROUTE_FWMARK If you say Y here, you will be able to specify different routes for packets with different FWMARK ("firewalling mark") values (see ipchains(8), "-m" argument). IP: verbose route monitoring CONFIG_IP_ROUTE_VERBOSE If you say Y here, which is recommended, then the kernel will print verbose messages regarding the routing, for example warnings about received packets which look strange and could be evidence of an attack or a misconfigured system somewhere. The information is handled by the klogd daemon which is responsible for kernel messages ("man klogd"). IP: large routing tables CONFIG_IP_ROUTE_LARGE_TABLES If you have routing zones that grow to more than about 64 entries, you may want to say Y here to speed up the routing process. IP: fast network address translation CONFIG_IP_ROUTE_NAT If you say Y here, your router will be able to modify source and destination addresses of packets that pass through it, in a manner you specify. General information about Network Address Translation can be gotten from the document http://www.csn.tu-chemnitz.de/~mha/linux-ip-nat/diplom/nat.html IP: optimize as router not host CONFIG_IP_ROUTER Some Linux network drivers use a technique called copy and checksum to optimize host performance. For a machine which acts as a router most of the time and is forwarding most packets to another host this is however a loss. If you say Y here, copy and checksum will be switched off. In the future, it may make other changes which optimize for router operation. Note that your box can only act as a router if you enable IP forwarding in your kernel; you can do that by saying Y to "/proc filesystem support" and "Sysctl support" below and executing the line echo "1" > /proc/sys/net/ipv4/ip_forward at boot time after the /proc filesystem has been mounted. You can do that even if you say N here. If unsure, say N here. IP: kernel level autoconfiguration CONFIG_IP_PNP This enables automatic configuration of IP addresses of devices and of the routing table during kernel boot, based on either information supplied at the kernel command line or by BOOTP or RARP protocols. You need to say Y only for diskless machines requiring network access to boot (in which case you want to say Y to "Root file system on NFS" as well), because all other machines configure the network in their startup scripts. BOOTP support CONFIG_IP_PNP_BOOTP If you want your Linux box to mount its whole root filesystem (the one containing the directory /) from some other computer over the net via NFS and you want the IP address of your computer to be discovered automatically at boot time using the BOOTP protocol (a special protocol designed for doing this job), say Y here. In case the boot ROM of your network card was designed for booting Linux and does BOOTP itself, providing all necessary information on the kernel command line, you can say N here. If unsure, say Y. Note that if you want to use BOOTP, a BOOTP server must be operating on your network. Read Documentation/nfsroot.txt for details. RARP support CONFIG_IP_PNP_RARP If you want your Linux box to mount its whole root filesystem (the one containing the directory /) from some other computer over the net via NFS and you want the IP address of your computer to be discovered automatically at boot time using the RARP protocol (an older protocol which is being obsoleted by BOOTP and DHCP), say Y here. Note that if you want to use RARP, a RARP server must be operating on your network. Read Documentation/nfsroot.txt for details. IP: tunneling CONFIG_NET_IPIP Tunneling means encapsulating data of one protocol type within another protocol and sending it over a channel that understands the encapsulating protocol. This particular tunneling driver implements encapsulation of IP within IP, which sounds kind of pointless, but can be useful if you want to make your (or some other) machine appear on a different network than it physically is, or to use mobile-IP facilities (allowing laptops to seamlessly move between networks without changing their IP addresses; check out http://anchor.cs.binghamton.edu/~mobileip/LJ/index.html ). Saying Y to this option will produce two modules ( = code which can be inserted in and removed from the running kernel whenever you want). Most people won't need this and can say N. IP: GRE tunnels over IP CONFIG_NET_IPGRE Tunneling means encapsulating data of one protocol type within another protocol and sending it over a channel that understands the encapsulating protocol. This particular tunneling driver implements GRE (Generic Routing Encapsulation) and at this time allows encapsulating of IPv4 or IPv6 over existing IPv4 infrastructure. This driver is useful if the other endpoint is a Cisco router: Cisco likes GRE much better than the other Linux tunneling driver ("IP: tunneling" above). In addition, GRE allows multicast redistribution through the tunnel. IP: broadcast GRE over IP CONFIG_NET_IPGRE_BROADCAST One application of GRE/IP is to construct a broadcast WAN (Wide Area Network), which looks like a normal Ethernet LAN (Local Area Network), but can be distributed all over the Internet. If you want to do that, say Y here and to "IP: multicast routing" below. IP: aliasing support CONFIG_IP_ALIAS Sometimes it is useful to give several IP addresses to a single physical network interface (serial port or Ethernet card). The most common case is that you want to serve different WWW or FTP documents to the outside depending on which of your host names was used to connect to you. This is called "multihosting" or "virtual domains" or "virtual hosting services" and is explained in the Virtual-Services-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . Another scenario would be that there are two logical networks living on your local Ethernet and you want to access them both with the same Ethernet card. This can also be done if you say Y here. The configuration of these alias addresses is done with a special name syntax explained in Documentation/networking/alias.txt and in the IP-Alias mini-HOWTO. If you want this, say Y. Most people don't need it and say N. IP: multicast routing CONFIG_IP_MROUTE This is used if you want your machine to act as a router for IP packets that have several destination addresses. It is needed on the MBONE, a high bandwidth network on top of the Internet which carries audio and video broadcasts. In order to do that, you would most likely run the program mrouted. Information about the multicast capabilities of the various network cards is contained in Documentation/networking/multicast.txt. If you haven't heard about it, you don't need it. IP: PIM-SM version 1 support CONFIG_IP_PIMSM_V1 Kernel side support for Sparse Mode PIM (Protocol Independent Multicast) version 1. This multicast routing protocol is used widely because Cisco supports it. You need special software to use it (pimd-v1). Please see http://netweb.usc.edu/pim/ for more information about PIM. Say Y if you want to use PIM-SM v1. Note that you can say N here if you just want to use Dense Mode PIM. IP: PIM-SM version 2 support CONFIG_IP_PIMSM_V2 Kernel side support for Sparse Mode PIM version 2. In order to use this, you need an experimental routing daemon supporting it (pimd or gated-5). This routing protocol is not used widely, so say N unless you want to play with it. PC/TCP compatibility mode CONFIG_INET_PCTCP If you have been having difficulties telnetting to your Linux machine from a DOS system that uses (broken) PC/TCP networking software (all versions up to OnNet 2.0) over your local Ethernet try saying Y here. Everyone else says N. People having problems with NCSA telnet should see the file linux/Documentation/networking/ncsa-telnet. Assume subnets are local CONFIG_INET_SNARL Say Y if you are on a subnetted network with all machines connected by Ethernet segments only, as this option optimizes network access for this special case. If there are other connections, e.g. SLIP links, between machines of your IP network, say N. If in doubt, answer N. The PATH mtu discovery facility will cover most cases anyway. Path MTU Discovery (normally enabled) CONFIG_PATH_MTU_DISCOVERY MTU (maximal transfer unit) is the size of the chunks we send out over the net. "Path MTU Discovery" means that, instead of always sending very small chunks, we start out sending big ones and if we then discover that some host along the way likes its chunks smaller, we adjust to a smaller size. This is good, so most people say Y here. However, some DOS software (versions of DOS NCSA telnet and Trumpet Winsock in PPP mode) is broken and won't be able to connect to your Linux machine correctly in all cases (especially through a terminal server) unless you say N here. See Documentation/networking/ncsa-telnet for the location of fixed NCSA telnet clients. If in doubt, say Y. Disable NAGLE algorithm (normally enabled) CONFIG_TCP_NAGLE_OFF The NAGLE algorithm works by requiring an acknowledgment before sending small IP frames (packets). This keeps tiny telnet and rlogin packets from congesting Wide Area Networks. Most people strongly recommend to say N here, thereby leaving NAGLE enabled. Those programs that would benefit from disabling this facility can do it on a per connection basis themselves. IP: Allow large windows (not recommended if <16 MB of memory) CONFIG_SKB_LARGE On high speed, long distance networks the performance limit on networking becomes the amount of data the sending machine can buffer until the other end confirms its reception. (At 45 Mbit/second there are a lot of bits between New York and London ...). If you say Y here, bigger buffers can be used which allows larger amounts of data to be "in flight" at any given time. It also means a user process can require a lot more memory for network buffers and thus this option is best used only on machines with 16 MB of memory or higher. Unless you are using long links with end to end speeds of over 2 Mbit a second or satellite links this option will make no difference to performance. Unix domain sockets CONFIG_UNIX If you say Y here, you will include support for Unix domain sockets; sockets are the standard Unix mechanism for establishing and accessing network connections. Many commonly used programs such as the X Window system and syslog use these sockets even if your machine is not connected to any network. Unless you are working on an embedded system or something similar, you therefore definitely want to say Y here. However, the socket support is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. The module will be called unix.o. If you try building this as a module and you have said Y to "Kernel module loader support" above, be sure to add 'alias net-pf-1 unix' to your /etc/modules.conf file. Note that several important services won't work correctly if you say M here and then neglect to load the module. Say Y unless you know what you are doing. The IPv6 protocol (EXPERIMENTAL) CONFIG_IPV6 This is experimental support for the next version of the Internet Protocol: IP version 6 (also called IPng "IP next generation"). Features of this new protocol include: expanded address space, authentication and privacy, and seamless interoperability with the current version of IP (IP version 4). For general information about IPv6, see http://playground.sun.com/pub/ipng/html/ipng-main.html ; for specific information about IPv6 under Linux read the HOWTO at http://www.bieringer.de/linux/IPv6/ and the file net/ipv6/README in the kernel source. If you want to use IPv6, please upgrade to the newest net-tools as given in Documentation/Changes. You will still be able to do regular IPv4 networking as well. This protocol support is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called ipv6.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. It is safe to say N here for now. IPv6: enable EUI-64 token format CONFIG_IPV6_EUI64 6bone, the network of computers using the IPv6 protocol, is moving to a new aggregatable address format and a new link local address assignment (EUI-64). Say Y if your site has upgraded already, or has started to upgrade. IPv6: disable provider based addresses CONFIG_IPV6_NO_PB Linux tries to operate correctly when your site has moved to EUI-64 only partially. Unfortunately, the two address formats (old: "provider based" and new: "aggregatable") are incompatible. Say Y if your site finished the upgrade to EUI-64, and/or you encountered some problems caused by the presence of two link-local addresses on an interface. IPv6: routing messages via old netlink CONFIG_IPV6_NETLINK You can say Y here to receive routing messages from the IPv6 code through the old netlink interface. However, a better option is to say Y to "Kernel/User network link driver" and to "Routing messages" instead. IPX networking CONFIG_IPX This is support for the Novell networking protocol, IPX, commonly used for local networks of Windows machines. You need it if you want to access Novell NetWare file or print servers using the Linux Novell client ncpfs (available from ftp://metalab.unc.edu/pub/Linux/system/filesystems/ ) or from within the Linux DOS emulator DOSEMU (read the DOSEMU-HOWTO, available from http://www.linuxdoc.org/docs.html#howto ). In order to do the former, you'll also have to say Y to "NCP filesystem support", below. IPX is similar in scope to IP, while SPX, which runs on top of IPX, is similar to TCP. There is also experimental support for SPX in Linux (see "SPX networking", below). To turn your Linux box into a fully featured NetWare file server and IPX router, say Y here and fetch either lwared from ftp://metalab.unc.edu/pub/Linux/system/network/daemons/ or mars_nwe from ftp://ftp.gwdg.de/pub/linux/misc/ncpfs . For more information, read the IPX-HOWTO available from http://www.linuxdoc.org/docs.html#howto . General information about how to connect Linux, Windows machines and Macs is on the WWW at http://www.eats.com/linux_mac_win.html . The IPX driver would enlarge your kernel by about 16 KB. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called ipx.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Unless you want to integrate your Linux box with a local Novell network, say N. IPX: Full internal IPX network CONFIG_IPX_INTERN Every IPX network has an address that identifies it. Sometimes it is useful to give an IPX "network" address to your Linux box as well (for example if your box is acting as a file server for different IPX networks: it will then be accessible from everywhere using the same address). The way this is done is to create a virtual internal "network" inside your box and to assign an IPX address to this network. Say Y here if you want to do this; read the IPX-HOWTO at http://www.linuxdoc.org/docs.html#howto for details. The full internal IPX network enables you to allocate sockets on different virtual nodes of the internal network. This is done by evaluating the field sipx_node of the socket address given to the bind call. So applications should always initialize the node field to 0 when binding a socket on the primary network. In this case the socket is assigned the default node that has been given to the kernel when the internal network was created. By enabling the full internal IPX network the cross-forwarding of packets targeted at 'special' sockets to sockets listening on the primary network is disabled. This might break existing applications, especially RIP/SAP daemons. A RIP/SAP daemon that works well with the full internal net can be found on ftp://ftp.gwdg.de/pub/linux/misc/ncpfs . If you don't know what you are doing, say N. IPX: SPX networking (EXPERIMENTAL) CONFIG_SPX The Sequenced Packet eXchange protocol is a transport layer protocol built on top of IPX. It is used in Novell NetWare systems for client-server applications and is similar to TCP (which runs on top of IP). Note that Novell NetWare file sharing does not use SPX; it uses a protocol called NCP, for which separate Linux support is available ("NCP filesystem support" below for the client side, and the user space programs lwared or mars_nwe for the server side). Say Y here if you have use for SPX; read the IPX-HOWTO at http://www.linuxdoc.org/docs.html#howto for details. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called af_spx.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. DECnet networking (EXPERIMENTAL) CONFIG_DECNET The DECnet networking protocol was used in many products made by Digital (now Compaq). It provides reliable stream and sequenced packet communications over which run a variety of services similar to those which run over TCP/IP. To find some tools to use with the kernel layer support, please look at Patrick Caulfield's web site: http://linux.dreamtime.org/decnet/ More detailed documentation is available in the Documentation/networking/decnet.txt file. Be sure to say Y to "/proc filesystem support" and "Sysctl support" below when using DECnet, since you will need sysctl support to aid in configuration at run time. The DECnet code is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module is called decnet.o. DECnet SIOCFIGCONF support CONFIG_DECNET_SIOCGIFCONF This option should only be turned on if you are really sure that you know what you are doing. It can break other applications which use this system call and the proper way to get the information provided by this call is to use rtnetlink. If unsure, say N. DECnet Router Support (EXPERIMENTAL) CONFIG_DECNET_ROUTER Add support for turning your DECnet Endnode into a level 1 or 2 router. This is an unfinished option for developers only. If you do turn it on, then make sure that you also say Y to "Kernel/User network link driver" and "Routing messages", since rtnetlink is the only current method of configuration. DECnet Raw Socket Support CONFIG_DECNET_RAW Add support for the SOCK_RAW type under DECnet. Used by userland routing programs to receive routing messages from the kernel and also as a general debugging aid to see what's going on "under the hood". AppleTalk DDP CONFIG_ATALK AppleTalk is the way Apple computers speak to each other on a network. If your Linux box is connected to such a network and you want to join the conversation, say Y. You will need to use the netatalk package so that your Linux box can act as a print and file server for Macs as well as access AppleTalk printers. Check out http://threepio.hitchcock.org/cgi-bin/faq/netatalk/faq.pl on the WWW for details. EtherTalk is the name used for AppleTalk over Ethernet and the cheaper and slower LocalTalk is AppleTalk over a proprietary Apple network using serial links. EtherTalk and LocalTalk are fully supported by Linux. General information about how to connect Linux, Windows machines and Macs is on the WWW at http://www.eats.com/linux_mac_win.html The NET-3-HOWTO, available from http://www.linuxdoc.org/docs.html#howto , contains valuable information as well. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module is called appletalk.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. I hear that the GNU boycott of Apple is over, so even politically correct people are allowed to say Y here. AppleTalk-IP driver support CONFIG_IPDDP This allows IP networking for users who only have AppleTalk networking available. This feature is experimental. With this driver, you can encapsulate IP inside AppleTalk (e.g. if your Linux box is stuck on an AppleTalk only network) or decapsulate (e.g. if you want your Linux box to act as an Internet gateway for a zoo of AppleTalk connected Macs). Please see the file Documentation/networking/ipddp.txt for more information. If you say Y here, the AppleTalk-IP support will be compiled into the kernel. In this case, you can either use encapsulation or decapsulation, but not both. With the following two questions, you decide which one you want. If you say M here, the AppleTalk-IP support will be compiled as a module ( = code which can be inserted in and removed from the running kernel whenever you want, read Documentation/modules.txt). The module is called ipddp.o. In this case, you will be able to use both encapsulation and decapsulation simultaneously, by loading two copies of the module and specifying different values for the module option ipddp_mode. IP to AppleTalk-IP Encapsulation support CONFIG_IPDDP_ENCAP If you say Y here, the AppleTalk-IP code will be able to encapsulate IP packets inside AppleTalk frames; this is useful if your Linux box is stuck on an AppleTalk network (which hopefully contains a decapsulator somewhere). Please see Documentation/networking/ipddp.txt for more information. If you said Y to "AppleTalk-IP driver support" above and you say Y here, then you cannot say Y to "AppleTalk-IP to IP Decapsulation support", below. AppleTalk-IP to IP Decapsulation support CONFIG_IPDDP_DECAP If you say Y here, the AppleTalk-IP code will be able to decapsulate AppleTalk-IP frames to IP packets; this is useful if you want your Linux box to act as an Internet gateway for an AppleTalk network. Please see Documentation/networking/ipddp.txt for more information. If you said Y to "AppleTalk-IP driver support" above and you say Y here, then you cannot say Y to "IP to AppleTalk-IP Encapsulation support", above. Apple/Farallon LocalTalk PC card support CONFIG_LTPC This allows you to use the AppleTalk PC card to connect to LocalTalk networks. The card is also known as the Farallon PhoneNet PC card. If you are in doubt, this card is the one with the 65C02 chip on it. You also need version 1.3.3 or later of the netatalk package. This driver is experimental, which means that it may not work. See the file Documentation/networking/ltpc.txt. COPS LocalTalk PC card support CONFIG_COPS This allows you to use COPS AppleTalk cards to connect to LocalTalk networks. You also need version 1.3.3 or later of the netatalk package. This driver is experimental, which means that it may not work. This driver will only work if you choose "AppleTalk DDP" networking support, above. Please read the file Documentation/networking/cops.txt. Dayna firmware support CONFIG_COPS_DAYNA Support COPS compatible cards with Dayna style firmware (Dayna DL2000/ Daynatalk/PC (half length), COPS LT-95, Farallon PhoneNET PC III, Farallon PhoneNET PC II). Tangent firmware support CONFIG_COPS_TANGENT Support COPS compatible cards with Tangent style firmware (Tangent ATB_II, Novell NL-1000, Daystar Digital LT-200. Amateur Radio support CONFIG_HAMRADIO If you want to connect your Linux box to an amateur radio, answer Y here. You want to read http://www.tapr.org/tapr/html/pkthome.html and the HAM-HOWTO and the AX25-HOWTO, both available from http://www.linuxdoc.org/docs.html#howto . Note that the answer to this question won't directly affect the kernel: saying N will just cause this configure script to skip all the questions about amateur radio. Amateur Radio AX.25 Level 2 CONFIG_AX25 This is the protocol used for computer communication over amateur radio. It is either used by itself for point-to-point links, or to carry other protocols such as tcp/ip. To use it, you need a device that connects your Linux box to your amateur radio. You can either use a low speed TNC (a Terminal Node Controller acts as a kind of modem connecting your computer's serial port to your radio's microphone input and speaker output) supporting the KISS protocol or one of the various SCC cards that are supported by the generic Z8530 or the DMA SCC driver. Another option are the Baycom modem serial and parallel port hacks or the sound card modem (supported by their own drivers). If you say Y here, you also have to say Y to one of those drivers. Information about where to get supporting software for Linux amateur radio as well as information about how to configure an AX.25 port is contained in the AX25-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . You might also want to check out the file Documentation/networking/ax25.txt in the kernel source. More information about digital amateur radio in general is on the WWW at http://www.tapr.org/tapr/html/pkthome.html . This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called ax25.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. AX.25 DAMA Slave support CONFIG_AX25_DAMA_SLAVE DAMA is a mechanism to prevent collisions when doing AX.25 networking. A DAMA server (called "master") accepts incoming traffic from clients (called "slaves") and redistributes it to other slaves. If you say Y here, your Linux box will act as a DAMA slave; this is transparent in that you don't have to do any special DAMA configuration. (Linux cannot yet act as a DAMA server.) If unsure, say N. AX.25 DAMA Master support CONFIG_AX25_DAMA_MASTER DAMA is a mechanism to prevent collisions when doing AX.25 networking. A DAMA server (called "master") accepts incoming traffic from clients (called "slaves") and redistributes it to other slaves. If you say Y here, your Linux box will act as a DAMA server. If unsure, say N. Amateur Radio NET/ROM CONFIG_NETROM NET/ROM is a network layer protocol on top of AX.25 useful for routing. A comprehensive listing of all the software for Linux amateur radio users as well as information about how to configure an AX.25 port is contained in the AX25-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . You also might want to check out the file Documentation/networking/ax25.txt. More information about digital amateur radio in general is on the WWW at http://www.tapr.org/tapr/html/pkthome.html . This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called netrom.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Amateur Radio X.25 PLP (Rose) CONFIG_ROSE The Packet Layer Protocol (PLP) is a way to route packets over X.25 connections in general and amateur radio AX.25 connections in particular, essentially an alternative to NET/ROM. A comprehensive listing of all the software for Linux amateur radio users as well as information about how to configure an AX.25 port is contained in the AX25-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . You also might want to check out the file Documentation/networking/ax25.txt. More information about digital amateur radio in general is on the WWW at http://www.tapr.org/tapr/html/pkthome.html . This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called rose.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Serial port KISS driver for AX.25 CONFIG_MKISS KISS is a protocol used for the exchange of data between a computer and a Terminal Node Controller (a small embedded system commonly used for networking over AX.25 amateur radio connections; it connects the computer's serial port with the radio's microphone input and speaker output). Although KISS is less advanced than the 6pack protocol, it has the advantage that it is already supported by most modern TNCs without the need for a firmware upgrade. If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called mkiss.o. Serial port 6PACK driver for AX.25 CONFIG_6PACK 6pack is a transmission protocol for the data exchange between your PC and your TNC (the Terminal Node Controller acts as a kind of modem connecting your computer's serial port to your radio's microphone input and speaker output). This protocol can be used as an alternative to KISS for networking over AX.25 amateur radio connections, but it has some extended functionality. Note that this driver is still experimental and might cause problems. For details about the features and the usage of the driver, read Documentation/networking/6pack.txt. If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called 6pack.o. BPQ Ethernet driver CONFIG_BPQETHER AX.25 is the protocol used for computer communication over amateur radio. If you say Y here, you will be able to send and receive AX.25 traffic over Ethernet (also called "BPQ AX.25"), which could be useful if some other computer on your local network has a direct amateur radio connection. High-speed (DMA) SCC driver for AX.25 CONFIG_DMASCC This is a driver for high-speed SCC boards, i.e. those supporting DMA on one port. You usually use those boards to connect your computer to an amateur radio modem (such as the WA4DSY 56kbps modem), in order to send and receive AX.25 packet radio network traffic. Currently, this driver supports Ottawa PI/PI2 (http://hydra.carleton.ca/info/pi2.html ) and Gracilis PackeTwin (http://www.paccomm.com/gracilis.html ) boards. They are detected automatically. If you have one of these cards, say Y here and read the AX25-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This driver can operate multiple boards simultaneously. If you compile it as a module (by saying M instead of Y), it will be called dmascc.o. If you don't pass any parameter to the driver, all possible I/O addresses are probed. This could irritate other devices that are currently not in use. You may specify the list of addresses to be probed by "dmascc=addr1,addr2,..." (when compiled into the kernel image) or "io=addr1,addr2,..." (when loaded as a module). The network interfaces will be called dmascc0 and dmascc1 for the board detected first, dmascc2 and dmascc3 for the second one, and so on. Before you configure each interface with ifconfig, you MUST set certain parameters, such as channel access timing, clock mode, and DMA channel. This is accomplished with a small utility program, dmascc_cfg, available at http://www.nt.tuwien.ac.at/~kkudielk/Linux/ . Z8530 SCC driver for AX.25 CONFIG_SCC These cards are used to connect your Linux box to an amateur radio in order to communicate with other computers. If you want to use this, read Documentation/networking/z8530drv.txt and the AX25-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . Also make sure to say Y to "Amateur Radio AX.25 Level 2" support. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called scc.o. additional delay for PA0HZP OptoSCC compatible boards CONFIG_SCC_DELAY Say Y here if you experience problems with the SCC driver not working properly; please read Documentation/networking/z8530drv.txt for details. If unsure, say N. #support for TRX that feedback the tx signal to rx #CONFIG_SCC_TRXECHO ### ### Don't know what's going on here. ### # YAM driver for AX.25 CONFIG_YAM The YAM is a modem for packet radio which connects to the serial port and includes some of the functions of a Terminal Node Controller. If you have one of those, say Y here. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. BAYCOM picpar and par96 driver for AX.25 CONFIG_BAYCOM_PAR This is a driver for Baycom style simple amateur radio modems that connect to a parallel interface. The driver supports the picpar and par96 designs. To configure the driver, use the sethdlc utility available in the standard ax25 utilities package. For information on the modems, see http://www.baycom.de and the file Documentation/networking/baycom.txt. If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. This is recommended. The module will be called baycom_par.o. BAYCOM EPP driver for AX.25 CONFIG_BAYCOM_EPP This is a driver for Baycom style simple amateur radio modems that connect to a parallel interface. The driver supports the EPP designs. To configure the driver, use the sethdlc utility available in the standard ax25 utilities package. For information on the modems, see http://www.baycom.de and the file Documentation/networking/baycom.txt. If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. This is recommended. The module will be called baycom_par.o. BAYCOM ser12 full duplex driver for AX.25 CONFIG_BAYCOM_SER_FDX This is one of two drivers for Baycom style simple amateur radio modems that connect to a serial interface. The driver supports the ser12 design in full duplex mode. In addition, it allows the baudrate to be set between 300 and 4800 baud (however not all modems support all baudrates). This is the preferred driver. The next driver, "BAYCOM ser12 half duplex driver for AX.25" is the old driver and still provided in case this driver does not work with your serial interface chip. To configure the driver, use the sethdlc utility available in the standard ax25 utilities package. For information on the modems, see http://www.baycom.de and Documentation/networking/baycom.txt. If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. This is recommended. The module will be called baycom_ser_fdx.o. BAYCOM ser12 half duplex driver for AX.25 CONFIG_BAYCOM_SER_HDX This is one of two drivers for Baycom style simple amateur radio modems that connect to a serial interface. The driver supports the ser12 design in full duplex mode. This is the old driver. It is still provided in case your serial interface chip does not work with the full duplex driver. This driver is depreciated. To configure the driver, use the sethdlc utility available in the standard ax25 utilities package. For information on the modems, see http://www.baycom.de and Documentation/networking/baycom.txt. If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. This is recommended. The module will be called baycom_ser_hdx.o. Sound card modem driver for AX.25 CONFIG_SOUNDMODEM This experimental driver allows a standard Sound Blaster or WindowsSoundSystem compatible sound card to be used as a packet radio modem (NOT as a telephone modem!), to send digital traffic over amateur radio. To configure the driver, use the sethdlc, smdiag and smmixer utilities available in the standard ax25 utilities package. For information on how to key the transmitter, see http://www.ife.ee.ethz.ch/~sailer/pcf/ptt_circ/ptt.html and Documentation/networking/soundmodem.txt. If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. This is recommended. The module will be called soundmodem.o. Sound card modem support for Sound Blaster and compatible cards CONFIG_SOUNDMODEM_SBC This option enables the soundmodem driver to use Sound Blaster and compatible cards. If you have a dual mode card (i.e. a WSS cards with a Sound Blaster emulation) you should say N here and Y to "Sound card modem support for WSS and Crystal cards", below, because this usually results in better performance. This option also supports SB16/32/64 in full duplex mode. Sound card modem support for WSS and Crystal cards CONFIG_SOUNDMODEM_WSS This option enables the soundmodem driver to use WindowsSoundSystem compatible cards. These cards feature a codec chip from either Analog Devices (such as AD1848, AD1845, AD1812) or Crystal Semiconductors (such as CS4248, CS423x). This option also supports the WSS full duplex operation which currently works with Crystal CS423x chips. If you don't need full duplex operation, do not enable it to save performance. Sound card modem support for 1200 baud AFSK modulation CONFIG_SOUNDMODEM_AFSK1200 This option enables the soundmodem driver 1200 baud AFSK modem, compatible to popular modems using TCM3105 or AM7911. The demodulator requires about 12% of the CPU power of a Pentium 75 CPU per channel. Sound card modem support for 2400 baud AFSK modulation (7.3728MHz crystal) CONFIG_SOUNDMODEM_AFSK2400_7 This option enables the soundmodem driver 2400 baud AFSK modem, compatible to TCM3105 modems (over-)clocked with a 7.3728MHz crystal. Note that the availability of this driver does _not_ imply that I recommend building such links. It is only here since users especially in eastern Europe have asked me to do so. In fact this modulation scheme has many disadvantages, mainly its incompatibility with many transceiver designs and the fact that the TCM3105 (if used) is operated widely outside its specifications. Sound card modem support for 2400 baud AFSK modulation (8MHz crystal) CONFIG_SOUNDMODEM_AFSK2400_8 This option enables the soundmodem driver 2400 baud AFSK modem, compatible to TCM3105 modems (over-)clocked with an 8MHz crystal. Note that the availability of this driver does _not_ imply that I recommend building such links. It is only here since users especially in eastern Europe have asked me to do so. In fact this modulation scheme has many disadvantages, mainly its incompatibility with many transceiver designs and the fact that the TCM3105 (if used) is operated widely outside its specifications. Sound card modem support for 2666 baud AFSK modulation CONFIG_SOUNDMODEM_AFSK2666 This option enables the soundmodem driver 2666 baud AFSK modem. This modem is experimental, and not compatible to anything else I know of. Sound card modem support for 4800 baud 8PSK modulation CONFIG_SOUNDMODEM_PSK4800 This option enables the soundmodem driver 4800 baud 8PSK modem. This modem is experimental, and not compatible to anything else I know of. Sound card modem support for 4800 baud HAPN-1 modulation CONFIG_SOUNDMODEM_HAPN4800 This option enables the soundmodem driver 4800 baud HAPN-1 compatible modem. This modulation seems to be widely used 'down under' and in the Netherlands. Here, nobody uses it, so I could not test if it works. It is compatible to itself, however :-) Sound card modem support for 9600 baud FSK G3RUH modulation CONFIG_SOUNDMODEM_FSK9600 This option enables the soundmodem driver 9600 baud FSK modem, compatible to the G3RUH standard. The demodulator requires about 4% of the CPU power of a Pentium 75 CPU per channel. You can say Y to both 1200 baud AFSK and 9600 baud FSK if you want (but obviously you can only use one protocol at a time, depending on what the other end can understand). CCITT X.25 Packet Layer (EXPERIMENTAL) CONFIG_X25 X.25 is a set of standardized network protocols, similar in scope to frame relay; the one physical line from your box to the X.25 network entry point can carry several logical point-to-point connections (called "virtual circuits") to other computers connected to the X.25 network. Governments, banks, and other organizations tend to use it to connect to each other or to form Wide Area Networks (WANs). Many countries have public X.25 networks. X.25 consists of two protocols: the higher level Packet Layer Protocol (PLP) (say Y here if you want that) and the lower level data link layer protocol LAPB (say Y to "LAPB Data Link Driver" below if you want that). You can read more about X.25 at http://www.sangoma.com/x25.htm and http://www.cisco.com/univercd/data/doc/software/11_0/rpcg/cx25.htm . Information about X.25 for Linux is contained in the files Documentation/networking/x25.txt and Documentation/networking/x25-iface.txt. One connects to an X.25 network either with a dedicated network card using the X.21 protocol (not yet supported by Linux) or one can do X.25 over a standard telephone line using an ordinary modem (say Y to "X.25 async driver" below) or over Ethernet using an ordinary Ethernet card and either the 802.2 LLC protocol (say Y to "802.2 LLC" below) or LAPB over Ethernet (say Y to "LAPB Data Link Driver" and "LAPB over Ethernet driver" below). If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called x25.o. If unsure, say N. LAPB Data Link Driver (EXPERIMENTAL) CONFIG_LAPB Link Access Procedure, Balanced (LAPB) is the data link layer (i.e. the lower) part of the X.25 protocol. It offers a reliable connection service to exchange data frames with one other host, and it is used to transport higher level protocols (mostly X.25 Packet Layer, the higher part of X.25, but others are possible as well). Usually, LAPB is used with specialized X.21 network cards, but Linux currently supports LAPB only over Ethernet connections. If you want to use LAPB connections over Ethernet, say Y here and to "LAPB over Ethernet driver" below. Read Documentation/networking/lapb-module.txt for technical details. If you want to compile this driver as a module though ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called lapb.o. If unsure, say N. 802.2 LLC (EXPERIMENTAL) CONFIG_LLC This is a Logical Link Layer protocol used for X.25 connections over Ethernet, using ordinary Ethernet cards. Bridging (EXPERIMENTAL) CONFIG_BRIDGE If you say Y here, then your Linux box will be able to act as an Ethernet bridge, which means that the different Ethernet segments it is connected to will appear as one Ethernet to the participants. Several such bridges can work together to create even larger networks of Ethernets using the IEEE802.1 spanning tree algorithm. As this is a standard, Linux bridges will interwork properly with other third party bridge products. In order to use this, you'll need the bridge configuration tools available from ftp://shadow.cabi.net/pub/Linux . Please read the Bridge mini-HOWTO for more information. Note that if your box acts as a bridge, it probably contains several Ethernet devices, but the kernel is not able to recognize more than one at boot time without help; for details read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . The Bridging code is still in test. If unsure, say N. Packet socket CONFIG_PACKET The Packet protocol is used by applications which communicate directly with network devices without an intermediate network protocol implemented in the kernel, e.g. tcpdump. If you want them to work, choose Y. This driver is also available as a module called af_packet.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt; if you use modprobe or kmod, you may also want to add "alias net-pf-17 af_packet" to /etc/modules.conf. If unsure, say Y. Packet socket: mmapped IO CONFIG_PACKET_MMAP If you say Y here, the Packet protocol driver will use an IO mechanism that results in faster communication. If unsure, say N. Kernel/User network link driver CONFIG_NETLINK This driver allows for two-way communication between the kernel and user processes; the user processes communicate with the kernel by reading from and writing to character special files in the /dev directory having major mode 36. So far, the kernel uses this feature to publish some network related information if you say Y to "Routing messages", below. You also need to say Y here if you want to use arpd, a daemon that helps keep the internal ARP cache (a mapping between IP addresses and hardware addresses on the local network) small. The ethertap device, which lets user space programs read and write raw Ethernet frames, also needs the network link driver. This driver is also available as a module called netlink_dev.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. If unsure, say Y. Routing messages CONFIG_RTNETLINK If you say Y here and create a character special file /dev/route with major number 36 and minor number 0 using mknod ("man mknod"), you (or some user space utility) can read some network related routing information from that file. Everything you write to that file will be discarded. Netlink device emulation CONFIG_NETLINK_DEV This is a backward compatibility option, choose Y for now. This option will be removed soon. Asynchronous Transfer Mode (ATM) CONFIG_ATM ATM is a high-speed networking technology for Local Area Networks and Wide Area Networks. It uses a fixed packet size and is connection oriented, allowing for the negotiation of minimum bandwidth requirements. In order to participate in an ATM network, your Linux box needs an ATM networking card. If you have that, say Y here and to the driver of your ATM card below. Note that you need a set of user-space programs to actually make use of ATM. See the file Documentation/atm.txt for further details. Classical IP over ATM CONFIG_ATM_CLIP Classical IP over ATM for PVCs and SVCs, supporting InARP and ATMARP. Typically you will either use LAN Emulation (LANE) or Classical IP to communicate with other IP hosts on your ATM network. Do NOT send ICMP if no neighbour CONFIG_ATM_CLIP_NO_ICMP Normally, an "ICMP host unreachable" message is sent if a neighbour cannot be reached because there is no VC to it in the kernel's ATMARP table. This may cause problems when ATMARP table entries are briefly removed during revalidation. If you say Y here, packets to such neighbours are silently discarded instead. LAN Emulation (LANE) support CONFIG_ATM_LANE LAN Emulation emulates services of existing LANs across an ATM network. Besides operating as a normal ATM end station client, Linux LANE client can also act as an proxy client bridging packets between ELAN and Ethernet segments. You need LANE if you want to try MPOA. Multi-Protocol Over ATM (MPOA) support CONFIG_ATM_MPOA Multi-Protocol Over ATM allows ATM edge devices such as routers, bridges and ATM attached hosts establish direct ATM VCs across subnetwork boundaries. These shortcut connections bypass routers enhancing overall network performance. ATM over TCP CONFIG_ATM_TCP ATM over TCP driver. Useful mainly for development and for experiments. If unsure, say N. Efficient Networks ENI155P CONFIG_ATM_ENI Driver for the Efficient Networks ENI155p series and SMC ATM Power155 155 Mbps ATM adapters. Both, the versions with 512kB and 2MB on-board RAM (Efficient calls them "C" and "S", respectively), and the FPGA and the ASIC Tonga versions of the board are supported. The driver works with MMF (-MF or ...F) and UTP-5 (-U5 or ...D) adapters. Enable extended debugging CONFIG_ATM_ENI_DEBUG Extended debugging records various events and displays that list when an inconsistency is detected. This mechanism is faster than generally using printks, but still has some impact on performance. Note that extended debugging may create certain race conditions itself. Enable this ONLY if you suspect problems with the driver. Fine-tune burst settings CONFIG_ATM_ENI_TUNE_BURST In order to obtain good throughput, the ENI NIC can transfer multiple words of data per PCI bus access cycle. Such a multi-word transfer is called a burst. The default settings for the burst sizes are suitable for most PCI chipsets. However, in some cases, large bursts may overrun buffers in the PCI chipset and cause data corruption. In such cases, large bursts must be disabled and only (slower) small bursts can be used. The burst sizes can be set independently in the send (TX) and receive (RX) direction. Note that enabling many different burst sizes in the same direction may increase the cost of setting up a transfer such that the resulting throughput is lower than when using only the largest available burst size. Also, sometimes larger bursts lead to lower throughput, e.g. on an Intel 440FX board, a drop from 135 Mbps to 103 Mbps was observed when going from 8W to 16W bursts. Enable 16W TX bursts (discouraged) CONFIG_ATM_ENI_BURST_TX_16W Burst sixteen words at once in the send direction. This may work with recent PCI chipsets, but is known to fail with older chipsets. Enable 8W TX bursts (recommended) CONFIG_ATM_ENI_BURST_TX_8W Burst eight words at once in the send direction. This is the default setting. Enable 4W TX bursts (optional) CONFIG_ATM_ENI_BURST_TX_4W Burst four words at once in the send direction. You may want to try this if you have disabled 8W bursts. Enabling 4W if 8W is also set may or may not improve throughput. Enable 2W TX bursts (optional) CONFIG_ATM_ENI_BURST_TX_2W Burst two words at once in the send direction. You may want to try this if you have disabled 4W and 8W bursts. Enabling 2W if 4W or 8W are also set may or may not improve throughput. Enable 16W RX bursts (discouraged) CONFIG_ATM_ENI_BURST_RX_16W Burst sixteen words at once in the receive direction. This may work with recent PCI chipsets, but is known to fail with older chipsets. Enable 8W RX bursts (discouraged) CONFIG_ATM_ENI_BURST_RX_8W Burst eight words at once in the receive direction. This may work with recent PCI chipsets, but is known to fail with older chipsets, such as the Intel Neptune series. Enable 4W RX bursts (recommended) CONFIG_ATM_ENI_BURST_RX_4W Burst four words at once in the receive direction. This is the default setting. Enabling 4W if 8W is also set may or may not improve throughput. Enable 2W RX bursts (optional) CONFIG_ATM_ENI_BURST_RX_2W Burst two words at once in the receive direction. You may want to try this if you have disabled 4W and 8W bursts. Enabling 2W if 4W or 8W are also set may or may not improve throughput. ZeitNet ZN1221/ZN1225 CONFIG_ATM_ZATM Driver for the ZeitNet ZN1221 (MMF) and ZN1225 (UTP-5) 155 Mbps ATM adapters. Enable extended debugging CONFIG_ATM_ZATM_DEBUG Extended debugging records various events and displays that list when an inconsistency is detected. This mechanism is faster than generally using printks, but still has some impact on performance. Note that extended debugging may create certain race conditions itself. Enable this ONLY if you suspect problems with the driver. Enable usec resolution timestamps CONFIG_ATM_ZATM_EXACT_TS The uPD98401 SAR chip supports a high-resolution timer (approx. 30 MHz) that is used for very accurate reception timestamps. Because that timer overflows after 140 seconds, and also to avoid timer drift, time measurements need to be periodically synchronized with the normal system time. Enabling this feature will add some general overhead for timer synchronization and also per-packet overhead for time conversion. IDT 77201 (NICStAR) CONFIG_ATM_NICSTAR The NICStAR chipset family is used in a large number of ATM NICs for 25 and for 155 Mbps, including IDT cards and the Fore ForeRunnerLE series. Madge Ambassador (Collage PCI 155 Server) CONFIG_ATM_AMBASSADOR This is a driver for ATMizer based ATM card produced by Madge Networks Ltd. Say Y (or M to compile as a module named ambassador.o) here if you have one of these cards. Enable debugging messages CONFIG_ATM_AMBASSADOR_DEBUG Somewhat useful debugging messages are available. The choice of messages is controlled by a bitmap. This may be specified as a module argument (kernel command line argument as well?), changed dynamically using an ioctl (not yet) or changed by sending the string "Dxxxx" to VCI 1023 (where x is a hex digit). See the file drivers/atm/ambassador.h for the meanings of the bits in the mask. When active, these messages can have a significant impact on the speed of the driver, and the size of your syslog files! When inactive, they will have only a modest impact on performance. Madge Horizon [Ultra] (Collage PCI 25 and Collage PCI 155 Client) CONFIG_ATM_HORIZON This is a driver for the Horizon chipset ATM adapter cards once produced by Madge Networks Ltd. Say Y (or M to compile as a module named horizon.o) here if you have one of these cards. Enable debugging messages CONFIG_ATM_HORIZON_DEBUG Somewhat useful debugging messages are available. The choice of messages is controlled by a bitmap. This may be specified as a module argument (kernel command line argument as well?), changed dynamically using an ioctl (not yet) or changed by sending the string "Dxxxx" to VCI 1023 (where x is a hex digit). See the file drivers/atm/horizon.h for the meanings of the bits in the mask. When active, these messages can have a significant impact on the speed of the driver, and the size of your syslog files! When inactive, they will have only a modest impact on performance. SCSI support? CONFIG_SCSI If you want to use a SCSI hard disk, SCSI tape drive, SCSI CDROM or any other SCSI device under Linux, say Y and make sure that you know the name of your SCSI host adapter (the card inside your computer that "speaks" the SCSI protocol, also called SCSI controller), because you will be asked for it. You also need to say Y here if you want support for the parallel port version of the 100 MB IOMEGA ZIP drive. Please read the SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . The SCSI-Programming-HOWTO contains information about how to add or remove an SCSI device from a running Linux machine without rebooting. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called scsi_mod.o. If you want to compile it as a module, say M here and read Documentation/modules.txt and Documentation/scsi.txt. However, do not compile this as a module if your root filesystem (the one containing the directory /) is located on a SCSI device. SCSI disk support CONFIG_BLK_DEV_SD If you want to use a SCSI hard disk or the SCSI or parallel port version of the IOMEGA ZIP drive under Linux, say Y and read the SCSI-HOWTO, the Disk-HOWTO and the Multi-Disk-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This is NOT for SCSI CDROMs. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called sd_mod.o. If you want to compile it as a module, say M here and read Documentation/modules.txt and Documentation/scsi.txt. Do not compile this driver as a module if your root filesystem (the one containing the directory /) is located on a SCSI disk. In this case, do not compile the driver for your SCSI host adapter (below) as a module either. SCSI tape support CONFIG_CHR_DEV_ST If you want to use a SCSI tape drive under Linux, say Y and read the SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto , and drivers/scsi/README.st in the kernel source. This is NOT for SCSI CDROMs. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called st.o. If you want to compile it as a module, say M here and read Documentation/modules.txt and Documentation/scsi.txt . SCSI CDROM support CONFIG_BLK_DEV_SR If you want to use a SCSI CDROM under Linux, say Y and read the SCSI-HOWTO and the CDROM-HOWTO at http://www.linuxdoc.org/docs.html#howto . Also make sure to say Y or M to "ISO 9660 CDROM filesystem support" later. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called sr_mod.o. If you want to compile it as a module, say M here and read Documentation/modules.txt and Documentation/scsi.txt . Enable vendor-specific extensions (for SCSI CDROM) CONFIG_BLK_DEV_SR_VENDOR This enables the usage of vendor specific SCSI commands. This is required to support multisession CDs with old NEC/TOSHIBA cdrom drives (and HP Writers). If you have such a drive and get the first session only, try saying Y here; everybody else says N. SCSI generic support CONFIG_CHR_DEV_SG If you want to use SCSI scanners, synthesizers or CD-writers or just about anything having "SCSI" in its name other than hard disks, CDROMs or tapes, say Y here. These won't be supported by the kernel directly, so you need some additional software which knows how to talk to these devices using the SCSI protocol. For CD-writers, you would need the program cdwrite, available from ftp://metalab.unc.edu/pub/Linux/utils/disk-management ; for other devices, it's possible that you'll have to write the driver software yourself, so have a look at the SCSI-HOWTO and at the SCSI-Programming-HOWTO, both available from http://www.linuxdoc.org/docs.html#howto . Please read the file Documentation/scsi-generic.txt for more information. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt and Documentation/scsi.txt. The module will be called sg.o. If unsure, say N. Debug new queueing code for SCSI CONFIG_SCSI_DEBUG_QUEUES This option turns on a lot of additional consistency checking for the new queueing code. This will adversely affect performance, but it is likely that bugs will be caught sooner if this is turned on. This will typically cause the kernel to panic if an error is detected, but it would have probably crashed if the panic weren't there. Comments/questions/problems to linux-scsi mailing list please. See http://www.andante.org/scsi_queue.html for more uptodate information. Probe all LUNs on each SCSI device CONFIG_SCSI_MULTI_LUN If you have a SCSI device that supports more than one LUN (Logical Unit Number), e.g. a CD jukebox, and only one LUN is detected, you can say Y here to force the SCSI driver to probe for multiple LUNs. A SCSI device with multiple LUNs acts logically like multiple SCSI devices. The vast majority of SCSI devices have only one LUN, and so most people can say N here and should in fact do so, because it is safer. Verbose SCSI error reporting (kernel size +=12K) CONFIG_SCSI_CONSTANTS The error messages regarding your SCSI hardware will be easier to understand if you say Y here; it will enlarge your kernel by about 12 KB. If in doubt, say Y. SCSI logging facility CONFIG_SCSI_LOGGING This turns on a logging facility that can be used to debug a number of SCSI related problems. If you say Y here, no logging output will appear by default, but you can enable logging by saying Y to "/proc filesystem support" and "Sysctl support" below and executing the command echo "scsi log token [level]" > /proc/scsi/scsi at boot time after the /proc filesystem has been mounted. There are a number of things that can be used for 'token' (you can find them in the source: drivers/scsi/scsi.c), and this allows you to select the types of information you want, and the level allows you to select the level of verbosity. If you say N here, it may be harder to track down some types of SCSI problems. If you say Y here your kernel will be somewhat larger, but there should be no noticeable performance impact as long as you have logging turned off. AdvanSys SCSI support CONFIG_SCSI_ADVANSYS This is a driver for all SCSI host adapters manufactured by AdvanSys. It is documented in the kernel source in drivers/scsi/advansys.c. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. The module will be called advansys.o. Adaptec AHA152X/2825 support CONFIG_SCSI_AHA152X This is a driver for the AHA-1510, AHA-1520, AHA-1522, and AHA-2825 SCSI host adapters. It also works for the AVA-1505, but the IRQ etc. must be manually specified in this case. It is explained in section 3.3 of the SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . You might also want to read the comments at the top of drivers/scsi/aha152x.c. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called aha152x.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Adaptec AHA1542 support CONFIG_SCSI_AHA1542 This is support for a SCSI host adapter. It is explained in section 3.4 of the SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . Note that Trantor was purchased by Adaptec, and some former Trantor products are being sold under the Adaptec name. If it doesn't work out of the box, you may have to change some settings in drivers/scsi/aha1542.h. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called aha1542.o. Adaptec AHA1740 support CONFIG_SCSI_AHA1740 This is support for a SCSI host adapter. It is explained in section 3.5 of the SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . If it doesn't work out of the box, you may have to change some settings in drivers/scsi/aha1740.h. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called aha1740.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Adaptec AIC7xxx chipset SCSI controller support CONFIG_SCSI_AIC7XXX This is support for the various aic7xxx based Adaptec SCSI controllers. These include the 274x EISA cards; 284x VLB cards; 2902, 2910, 293x, 294x, 394x, 3985 and several other PCI and motherboard based SCSI controllers from Adaptec. It does not support the AAA-13x RAID controllers from Adaptec, nor will it likely ever support them. It does not support the 2920 cards from Adaptec that use the Future Domain SCSI controller chip. For those cards, you need the "Future Domain 16xx SCSI support" driver. In general, if the controller is based on an Adaptec SCSI controller chip from the aic777x series or the aic78xx series, this driver should work. The only exception is the 7810 which is specifically not supported (that's the RAID controller chip on the AAA-13x cards). Note that the AHA2920 SCSI host adapter is *not* supported by this driver; choose "Future Domain 16xx SCSI support" instead if you have one of those. Information on the configuration options for this controller can be found by checking the help file for each of the available configuration options. You should read drivers/scsi/README.aic7xxx at a minimum before contacting the maintainer with any questions. The SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto , can also be of great help. If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called aic7xxx.o. Enable or Disable Tagged Command Queueing by default CONFIG_AIC7XXX_TCQ_ON_BY_DEFAULT This option causes the aic7xxx driver to attempt to use Tagged Command Queueing (TCQ) on all devices that claim to support it. TCQ is a feature of SCSI-2 which improves performance: the host adapter can send several SCSI commands to a device's queue even if previous commands haven't finished yet. Because the device is intelligent, it can optimize its operations (like head positioning) based on its own request queue. Not all devices implement this correctly. If you say Y here, you can still turn off TCQ on troublesome devices with the use of the tag_info boot parameter. See the file drivers/scsi/README.aic7xxx for more information on that and other aic7xxx setup commands. If this option is turned off, you may still enable TCQ on known good devices by use of the tag_info boot parameter. If you are unsure about your devices then it is safest to say N here. However, TCQ can increase performance on some hard drives by as much as 50% or more, so it is recommended that if you say N here, you should at least read the README.aic7xxx file so you will know how to enable this option manually should your drives prove to be safe in regards to TCQ. Conversely, certain drives are known to lock up or cause bus resets when TCQ is enabled on them. If you have a Western Digital Enterprise SCSI drive for instance, then don't even bother to enable TCQ on it as the drive will become unreliable, and it will actually reduce performance. Default number of TCQ commands per device CONFIG_AIC7XXX_CMDS_PER_DEVICE Specify the number of commands you would like to allocate per SCSI device when Tagged Command Queueing (TCQ) is enabled on that device. Reasonable figures are in the range of 8 to 24 commands per device, but depending on hardware could be increased or decreased from that figure. If the number is too high for any particular device, the driver will automatically compensate usually after only 10 minutes of uptime. It will not hinder performance if some of your devices eventually have their command depth reduced, but is a waste of memory if all of your devices end up reducing this number down to a more reasonable figure. NOTE: Certain very broken drives are known to lock up when given more commands than they like to deal with. Quantum Fireball drives are the most common in this category. For the Quantum Fireball drives it is suggested to use no more than 8 commands per device. Default: 8 Collect statistics to report in /proc CONFIG_AIC7XXX_PROC_STATS This option tells the driver to keep track of how many commands have been sent to each particular device and report that information to the user via the /proc/scsi/aic7xxx/n file, where n is the number of the aic7xxx controller you want the information on. This adds a small amount of overhead to each and every SCSI command the aic7xxx driver handles, so if you aren't really interested in this information, it is best to leave it disabled. This will only work if you also say Y to "/proc filesystem support", below. If unsure, say N. Delay in seconds after SCSI bus reset CONFIG_AIC7XXX_RESET_DELAY This sets how long the driver will wait after resetting the SCSI bus before attempting to communicate with the devices on the SCSI bus again. This delay will be used during the reset phase at bootup time as well as after any reset that might occur during normal operation. Reasonable numbers range anywhere from 5 to 15 seconds depending on your devices. DAT tape drives are notorious for needing more time after a bus reset to be ready for the next command, but most hard drives and CD-ROM devices are ready in only a few seconds. This option has a maximum upper limit of 20 seconds to avoid bad interactions between the aic7xxx driver and the rest of the linux kernel. The default value has been reduced to 5 seconds. If this doesn't work with your hardware, try increasing this value. IBM ServeRAID Support CONFIG_SCSI_IPS This is support for the IBM ServeRAID hardware RAID controllers. Consult the SCSI-HOWTO, available via anonymous FTP from ftp://metalab.unc.edu/pub/Linux/docs/HOWTO, and the file README.ips in drivers/scsi for more information. If this driver does not work correctly without modification please contact the author by email at ipslinux@us.ibm.com. IBM ServeRAID Support CONFIG_SCSI_IPS This is support for the IBM ServeRAID hardware RAID controllers. Consult the SCSI-HOWTO, available via anonymous FTP from ftp://metalab.unc.edu/pub/Linux/docs/HOWTO, and the file README.ips in drivers/scsi for more information. If this driver does not work correctly without modification please contact the author by email at ipslinux@us.ibm.com. BusLogic SCSI support CONFIG_SCSI_BUSLOGIC This is support for BusLogic MultiMaster and FlashPoint SCSI Host Adapters. Consult the SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto , and the files README.BusLogic and README.FlashPoint in drivers/scsi for more information. If this driver does not work correctly without modification, please contact the author, Leonard N. Zubkoff, by email to lnz@dandelion.com. You can also build this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), but only a single instance may be loaded. If you want to compile it as a module, say M here and read Documentation/modules.txt. The module will be called BusLogic.o. Omit BusLogic SCSI FlashPoint support CONFIG_SCSI_OMIT_FLASHPOINT This option allows you to omit the FlashPoint support from the BusLogic SCSI driver. The FlashPoint SCCB Manager code is substantial, so users of MultiMaster Host Adapters may wish to omit it. DTC3180/3280 SCSI support CONFIG_SCSI_DTC3280 This is support for DTC 3180/3280 SCSI Host Adapters. Please read the SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto , and the file drivers/scsi/README.dtc3x80. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called dtc.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. EATA-DMA [Obsolete] (DPT, NEC, AT&T, SNI, AST, Olivetti, Alphatronix) support CONFIG_SCSI_EATA_DMA This is support for the EATA-DMA protocol compliant SCSI Host Adapters like the SmartCache III/IV, SmartRAID controller families and the DPT PM2011B and PM2012B controllers. Note that this driver is obsolete; if you have one of the above SCSI Host Adapters, you should normally say N here and Y to "EATA ISA/EISA/PCI support", below. Please read the SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called eata_dma.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. EATA-PIO (old DPT PM2001, PM2012A) support CONFIG_SCSI_EATA_PIO This driver supports all EATA-PIO protocol compliant SCSI Host Adapters like the DPT PM2001 and the PM2012A. EATA-DMA compliant host adapters could also use this driver but are discouraged from doing so, since this driver only supports hard disks and lacks numerous features. You might want to have a look at the SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called eata_pio.o. UltraStor 14F/34F support CONFIG_SCSI_U14_34F This is support for the UltraStor 14F and 34F SCSI-2 host adapters. The source at drivers/scsi/u14-34f.c contains some information about this hardware. If the driver doesn't work out of the box, you may have to change some settings in drivers/scsi/u14-34f.c. Read the SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . Note that there is also another driver for the same hardware: "UltraStor SCSI support", below. You should say Y to both only if you want 24F support as well. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called u14-34f.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. enable elevator sorting CONFIG_SCSI_U14_34F_LINKED_COMMANDS This option enables elevator sorting for all probed SCSI disks and CDROMs. It definitely reduces the average seek distance when doing random seeks, but this does not necessarily result in a noticeable performance improvement: your mileage may vary... The safe answer is N. maximum number of queued commands CONFIG_SCSI_U14_34F_MAX_TAGS This specifies how many SCSI commands can be maximally queued for each probed SCSI device. You should reduce the default value of 8 only if you have disks with buggy or limited tagged command support. Minimum is 2 and maximum is 14. This value is also the window size used by the elevator sorting option above. The effective value used by the driver for each probed SCSI device is reported at boot time. Future Domain 16xx SCSI/AHA-2920A support CONFIG_SCSI_FUTURE_DOMAIN This is support for Future Domain's 16-bit SCSI host adapters (TMC-1660/1680, TMC-1650/1670, TMC-3260, TMC-1610M/MER/MEX) and other adapters based on the Future Domain chipsets (Quantum ISA-200S, ISA-250MG; Adaptec AHA-2920A; and at least one IBM board). It is explained in section 3.7 of the SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . NOTE: Newer Adaptec AHA-2920C boards use the Adaptec AIC-7850 chip and should use the aic7xxx driver ("Adaptec AIC7xxx chipset SCSI controller support"). This Future Domain driver works with the older Adaptec AHA-2920A boards with a Future Domain chip on them. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called fdomain.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Future Domain MCS-600/700 SCSI support CONFIG_SCSI_FD_MCS This is support for Future Domain MCS 600/700 MCA SCSI adapters. Some PS/2 computers are equipped with IBM Fast SCSI Adapter/A which is identical to the MCS 700 and hence also supported by this driver. This driver also supports the Reply SB16/SCSI card (the SCSI part). It supports multiple adapters in the same system. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called fd_mcs.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Generic NCR5380/53c400 SCSI support CONFIG_SCSI_GENERIC_NCR5380 This is the generic NCR family of SCSI controllers, not to be confused with the NCR 53c7 or 8xx controllers. It is explained in section 3.8 of the SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . If it doesn't work out of the box, you may have to change some settings in drivers/scsi/g_NCR5380.h. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called g_NCR5380.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Enable NCR53c400 extensions CONFIG_SCSI_GENERIC_NCR53C400 This enables certain optimizations for the NCR53c400 SCSI cards. You might as well try it out. Note that this driver will only probe for the Trantor T130B in its default configuration; you might have to pass a command line option to the kernel at boot time if it doesn't detect your card. See the file drivers/scsi/README.g_NCR5380 for details. NCR5380/53c400 mapping method (use Port for T130B) CONFIG_SCSI_G_NCR5380_PORT The NCR5380 and NCR53c400 SCSI controllers come in two varieties: port or memory mapped. You should know what you have. The most common card, Trantor T130B, uses port mapped mode. NCR53c7,8xx SCSI support CONFIG_SCSI_NCR53C7xx This is a driver for the 53c7 and 8xx NCR family of SCSI controllers, not to be confused with the NCR 5380 controllers. It is explained in section 3.8 of the SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . If it doesn't work out of the box, you may have to change some settings in drivers/scsi/53c7,8xx.h. Please read drivers/scsi/README.ncr53c7xx for the available boot time command line options. Note: there is another driver for the 53c8xx family of controllers ("NCR53C8XX SCSI support" below). If you want to use them both, you need to say M to both and build them as modules, but only one may be active at a time. If you have a 53c8xx board, it's better to use the other driver. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called 53c7,8xx.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. always negotiate synchronous transfers CONFIG_SCSI_NCR53C7xx_sync In general, this is good; however, it is a bit dangerous since there are some broken SCSI devices out there. Take your chances. Safe bet is N. allow FAST-SCSI [10MHz] CONFIG_SCSI_NCR53C7xx_FAST This will enable 10MHz FAST-SCSI transfers with your host adapter. Some systems have problems with that speed, so it's safest to say N here. allow DISCONNECT CONFIG_SCSI_NCR53C7xx_DISCONNECT This enables the disconnect/reconnect feature of the NCR SCSI controller. When you say Y here, a slow SCSI device will not lock the SCSI bus while processing a request, allowing simultaneous use of e.g. a SCSI hard disk and SCSI tape or CD-ROM drive, and providing much better performance when using slow and fast SCSI devices at the same time. Some devices, however, do not operate properly with this option enabled, and will cause your SCSI system to hang, which might cause a system crash. The safe answer therefore is to say N. NCR53C8XX SCSI support CONFIG_SCSI_NCR53C8XX This is the BSD ncr driver adapted to Linux for the NCR53C8XX family of PCI-SCSI controllers. This driver supports parity checking, tagged command queuing and fast synchronous data transfers up to 80 MB/s with wide FAST-40 LVD devices and controllers. Recent versions of the 53C8XX chips are better supported by the option "SYM53C8XX SCSI support", below. Note: there is yet another driver for the 53c8xx family of controllers ("NCR53c7,8xx SCSI support" above). If you want to use them both, you need to say M to both and build them as modules, but only one may be active at a time. If you have a 53c8xx board, you probably do not want to use the "NCR53c7,8xx SCSI support". Please read drivers/scsi/README.ncr53c8xx for more information. SYM53C8XX SCSI support CONFIG_SCSI_SYM53C8XX This driver supports all the features of recent 53C8XX chips (used in PCI SCSI controllers), notably the hardware phase mismatch feature of the SYM53C896. Older versions of the 53C8XX chips are not supported by this driver. If your system uses either a 810 rev. < 16, a 815, or a 825 rev. < 16 PCI SCSI processor, you must use the generic NCR53C8XX driver ("NCR53C8XX SCSI support" above) or configure both the NCR53C8XX and this SYM53C8XX drivers either as module or linked to the kernel image. When both drivers are linked into the kernel, the SYM53C8XX driver is called first at initialization and you can use the 'excl=ioaddr' driver boot option to exclude attachment of adapters by the SYM53C8XX driver. For example, entering 'sym53c8xx=excl:0xb400,excl=0xc000' at the lilo prompt prevents adapters at io address 0xb400 and 0xc000 from being attached by the SYM53C8XX driver, thus allowing the NCR53C8XX driver to attach them. The 'excl' option is also supported by the NCR53C8XX driver. Please read drivers/scsi/README.ncr53c8xx for more information. synchronous data transfers frequency CONFIG_SCSI_NCR53C8XX_SYNC The SCSI Parallel Interface-2 Standard defines 4 classes of transfer rates: FAST-5, FAST-10, FAST-20 and FAST-40. The numbers are respectively the maximum data transfer rates in mega-transfers per second for each class. For example, a FAST-20 Wide 16 device is able to transfer data at 20 million 16 bit packets per second for a total rate of 40 MB/s. You may specify 0 if you want to only use asynchronous data transfers. This is the safest and slowest option. Otherwise, specify a value between 5 and 40, depending on the capability of your SCSI controller. The higher the number, the faster the data transfer. Note that 40 should normally be ok since the driver decreases the value automatically according to the controller's capabilities. Your answer to this question is ignored for controllers with NVRAM, since the driver will get this information from the user set-up. It also can be overridden using a boot setup option, as follows (example): 'ncr53c8xx=sync:12' will allow the driver to negotiate for FAST-20 synchronous data transfer (20 mega-transfers per second). The normal answer therefore is not to go with the default but to select the maximum value 40 allowing the driver to use the maximum value supported by each controller. If this causes problems with your SCSI devices, you should come back and decrease the value. There is no safe option other than using good cabling, right terminations and SCSI conformant devices. use normal IO CONFIG_SCSI_NCR53C8XX_IOMAPPED If you say Y here, the driver will use normal IO, as opposed to memory mapped IO. Memory mapped IO has less latency than normal IO and works for most Intel-based hardware. Under Linux/Alpha only normal IO is currently supported by the driver and so, this option has no effect on those systems. The normal answer therefore is N; try Y only if you encounter SCSI related problems. not allow targets to disconnect CONFIG_SCSI_NCR53C8XX_NO_DISCONNECT This option is only provided for safety if you suspect some SCSI device of yours to not support properly the target-disconnect feature. In that case, you would say Y here. In general however, to not allow targets to disconnect is not reasonable if there is more than 1 device on a SCSI bus. The normal answer therefore is N. default tagged command queue depth CONFIG_SCSI_NCR53C8XX_DEFAULT_TAGS "Tagged command queuing" is a feature of SCSI-2 which improves performance: the host adapter can send several SCSI commands to a device's queue even if previous commands haven't finished yet. Because the device is intelligent, it can optimize its operations (like head positioning) based on its own request queue. Some SCSI devices don't implement this properly; if you want to disable this feature, enter 0 or 1 here (it doesn't matter which). The default value is 8 and should be supported by most hard disks. This value can be overridden from the boot command line using the 'tags' option as follows (example): 'ncr53c8xx=tags:4/t2t3q16/t0u2q10' will set default queue depth to 4, set queue depth to 16 for target 2 and target 3 on controller 0 and set queue depth to 10 for target 0 / lun 2 on controller 1. The normal answer therefore is to go with the default 8 and to use a boot command line option for devices that need to use a different command queue depth. There is no safe option other than using good SCSI devices. maximum number of queued commands CONFIG_SCSI_NCR53C8XX_MAX_TAGS This option allows you to specify the maximum number of commands that can be queued to any device, when tagged command queuing is possible. The default value is 32. Minimum is 2, maximum is 64. Modern hard disks are able to support 64 tags and even more, but do not seem to be faster when more than 32 tags are being used. So, the normal answer here is to go with the default value 32 unless you are using very large hard disks with large cache (>= 1 MB) that are able to take advantage of more than 32 tagged commands. There is no safe option and the default answer is recommended. assume boards are SYMBIOS compatible (EXPERIMENTAL) CONFIG_SCSI_NCR53C8XX_SYMBIOS_COMPAT This option allows you to enable some features depending on GPIO wiring. These General Purpose Input/Output pins can be used for vendor specific features or implementation of the standard SYMBIOS features. Genuine SYMBIOS controllers use GPIO0 in output for controller LED and GPIO3 bit as a flag indicating singled-ended/differential interface. The Tekram DC-390U/F boards uses a different GPIO wiring. Your answer to this question is ignored if all your controllers have NVRAM, since the driver is able to detect the board type from the NVRAM format. If all the controllers in your system are genuine SYMBIOS boards or use BIOS and drivers from SYMBIOS, you would want to say Y here, otherwise N. N is the safe answer. enable profiling statistics gathering CONFIG_SCSI_NCR53C8XX_PROFILE This option allows you to enable profiling information gathering. These statistics are not very accurate due to the low frequency of the kernel clock (100 Hz on i386) and have performance impact on systems that use very fast devices. The normal answer therefore is N. include support for the NCR PQS/PDS SCSI card CONFIG_SCSI_NCR53C8XX_PQS_PDS Say Y here if you have a special SCSI adapter produced by NCR corporation called a PCI Quad SCSI or PCI Dual SCSI. You do not need this if you do not have one of these adapters. However, since this device is detected as a specific PCI device, this option is quite safe. The common answer here is N, but answering Y is safe. IBMMCA SCSI support CONFIG_SCSI_IBMMCA This is support for the IBM SCSI adapter found in many of the PS/2 series computers. These machines have an MCA bus, so you need to answer Y to "MCA support" as well and read Documentation/mca.txt. If the adapter isn't found during boot (a common problem for models 56, 57, 76, and 77) you'll need to use the 'ibmmcascsi=' kernel option, where is the id of the SCSI subsystem (usually 7, but if that doesn't work check your reference diskette). Owners of model 95 with a LED-matrix-display can in addition activate some activity info like under OS/2, but more informative, by setting 'ibmmcascsi=display' as an additional kernel parameter. Try "man bootparam" or see the documentation of your boot loader about how to pass options to the kernel. The lilo procedure is also explained in the SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called ibmmca.o. Standard SCSI-order CONFIG_IBMMCA_SCSI_ORDER_STANDARD In the PC-world and in most modern SCSI-BIOS-setups, SCSI-hard disks are assigned to the drive letters, starting with the lowest SCSI-id (physical number -- pun) to be drive C:, as seen from DOS and similar operating systems. When looking into papers describing the ANSI-SCSI-standard, this assignment of drives appears to be wrong. The SCSI-standard follows a hardware-hierarchy which says that id 7 has the highest priority and id 0 the lowest. Therefore, the host adapters are still today everywhere placed as SCSI-id 7 by default. In the SCSI-standard, the drive letters express the priority of the disk. C: should be the hard disk, or a partition on it, with the highest priority. This must therefore be the disk with the highest SCSI-id (e.g. 6) and not the one with the lowest! IBM-BIOS kept the original definition of the SCSI-standard as also industrial- and process-control-machines, like VME-CPUs running under realtime-OSs (e.g. LynxOS, OS9) do. If you like to run Linux on your MCA-machine with the same assignment of hard disks as seen from e.g. DOS or OS/2 on your machine, which is in addition conformant to the SCSI-standard, you must say Y here. This is also necessary for MCA-Linux users who want to keep downward compatibility to older releases of the IBM-MCA-SCSI-driver (older than driver-release 2.00 and older than June 1997). If you like to have the lowest SCSI-id assigned as drive C:, as modern SCSI-BIOSes do, which does not conform to the standard, but is widespread and common in the PC-world of today, you must say N here. If unsure, say Y. Reset SCSI-devices at boot time CONFIG_IBMMCA_SCSI_DEV_RESET By default, SCSI-devices are reset when the machine is powered on. However, some devices exist, like special-control-devices, SCSI-CNC-machines, SCSI-printer or scanners of older type, that do not reset when switched on. If you say Y here, each device connected to your SCSI-bus will be issued a reset-command after it has been probed, while the kernel is booting. This may cause problems with more modern devices, like hard disks, which do not appreciate these reset commands, and can cause your system to hang. So say Y only if you know that one of your older devices needs it; N is the safe answer. NCR 53C9x MCA support CONFIG_SCSI_MCA_53C9X Some Microchannel machines, notably the NCR 35xx line, use a SCSI controller based on the NCR 53C94. This driver will allow use of the controller on the 3550, and very possibly others. If you want to compile this as a module (= code which can be inserted and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called mca_53c9x.o. Always IN2000 SCSI support CONFIG_SCSI_IN2000 This is support for an ISA bus SCSI host adapter. You'll find more information in drivers/scsi/in2000.readme. If it doesn't work out of the box, you may have to change the jumpers for IRQ or address selection. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called in2000.o. Initio 91XXU(W) SCSI support CONFIG_SCSI_INITIO This is support for the Initio 91XXU(W) SCSI host adapter. Please read the SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called initio.o PAS16 SCSI support CONFIG_SCSI_PAS16 This is support for a SCSI host adapter. It is explained in section 3.10 of the SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . If it doesn't work out of the box, you may have to change some settings in drivers/scsi/pas16.h. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called pas16.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Initio INI-A100U2W SCSI support CONFIG_SCSI_INIA100 This is support for the Initio INI-A100U2W SCSI host adapter. Please read the SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called a100u2w.o PCI2000 support CONFIG_SCSI_PCI2000 This is support for the PCI2000I EIDE interface card which acts as a SCSI host adapter. Please read the SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This driver is also available as a module called pci2000.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. PCI2220i support CONFIG_SCSI_PCI2220I This is support for the PCI2220i EIDE interface card which acts as a SCSI host adapter. Please read the SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This driver is also available as a module called pci2220i.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. PSI240i support CONFIG_SCSI_PSI240I This is support for the PSI240i EIDE interface card which acts as a SCSI host adapter. Please read the SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This driver is also available as a module called psi240i.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. Qlogic FAS SCSI support CONFIG_SCSI_QLOGIC_FAS This is a driver for the ISA, VLB, and PCMCIA versions of the Qlogic FastSCSI! cards as well as any other card based on the FASXX chip (including the Control Concepts SCSI/IDE/SIO/PIO/FDC cards). This driver does NOT support the PCI versions of these cards. The PCI versions are supported by the Qlogic ISP driver ("Qlogic ISP SCSI support"), below. Information about this driver is contained in drivers/scsi/README.qlogicfas. You should also read the SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called qlogicfas.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Qlogic ISP SCSI support (EXPERIMENTAL) CONFIG_SCSI_QLOGIC_ISP This driver works for all QLogic PCI SCSI host adapters (IQ-PCI, IQ-PCI-10, IQ_PCI-D) except for the PCI-basic card. (This latter card is supported by the "AM53/79C974 PCI SCSI" driver). If you say Y here, make sure to choose "BIOS" at the question "PCI access mode". Please read the file drivers/scsi/README.qlogicisp. You should also read the SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called qlogicisp.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Qlogic ISP FC SCSI support CONFIG_SCSI_QLOGIC_FC This is a driver for the QLogic ISP2100 SCSI-FCP host adapter. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called qlogicfc.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Seagate ST-02 and Future Domain TMC-8xx SCSI support CONFIG_SCSI_SEAGATE These are 8-bit SCSI controllers; the ST-01 is also supported by this driver. It is explained in section 3.9 of the SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . If it doesn't work out of the box, you may have to change some settings in drivers/scsi/seagate.h. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called seagate.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Trantor T128/T128F/T228 SCSI support CONFIG_SCSI_T128 This is support for a SCSI host adapter. It is explained in section 3.11 of the SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . If it doesn't work out of the box, you may have to change some settings in drivers/scsi/t128.h. Note that Trantor was purchased by Adaptec, and some former Trantor products are being sold under the Adaptec name. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called t128.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. UltraStor SCSI support CONFIG_SCSI_ULTRASTOR This is support for the UltraStor 14F, 24F and 34F SCSI-2 host adapter family. This driver is explained in section 3.12 of the SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . If it doesn't work out of the box, you may have to change some settings in drivers/scsi/ultrastor.h. Note that there is also another driver for the same hardware: "UltraStor 14F/34F support", above. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called ultrastor.o. 7000FASST SCSI support CONFIG_SCSI_7000FASST This driver supports the Western Digital 7000 SCSI host adapter family. Some information is in the source: drivers/scsi/wd7000.c. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called wd7000.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. ACARD SCSI support CONFIG_SCSI_ACARD This driver supports the ACARD 870U/W SCSI host adapter. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called atp870u.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. EATA ISA/EISA/PCI (DPT and generic EATA/DMA-compliant boards) support CONFIG_SCSI_EATA This driver supports all EATA/DMA-compliant SCSI host adapters. DPT ISA and all EISA i/o addresses are probed looking for the "EATA" signature. If you chose "BIOS" at the question "PCI access mode", the addresses of all the PCI SCSI controllers reported by the PCI subsystem are probed as well. You want to read the start of drivers/scsi/eata.c and the SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . Note that there is also another driver for the same hardware available: "EATA-DMA support". You should say Y to only one of them. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called eata.o. enable tagged command queuing CONFIG_SCSI_EATA_TAGGED_QUEUE This is a feature of SCSI-2 which improves performance: the host adapter can send several SCSI commands to a device's queue even if previous commands haven't finished yet. Most EATA adapters negotiate this feature automatically with the device, even if your answer is N. The safe answer is N. enable elevator sorting CONFIG_SCSI_EATA_LINKED_COMMANDS This option enables elevator sorting for all probed SCSI disks and CDROMs. It definitely reduces the average seek distance when doing random seeks, but this does not necessarily result in a noticeable performance improvement: your mileage may vary... The safe answer is N. maximum number of queued commands CONFIG_SCSI_EATA_MAX_TAGS This specifies how many SCSI commands can be maximally queued for each probed SCSI device. You should reduce the default value of 16 only if you have disks with buggy or limited tagged command support. Minimum is 2 and maximum is 62. This value is also the window size used by the elevator sorting option above. The effective value used by the driver for each probed SCSI device is reported at boot time. NCR53c406a SCSI support CONFIG_SCSI_NCR53C406A This is support for the NCR53c406a SCSI host adapter. For user configurable parameters, check out drivers/scsi/NCR53c406.c in the kernel source. Also read the SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called NCR53c406.o. Symbios Logic sym53c416 support CONFIG_SCSI_SYM53C416 This is support for the sym53c416 SCSI host adapter, the SCSI adapter that comes with some HP scanners. This driver requires that the sym53c416 is configured first using some sort of pnp configuration program (e.g. isapnp) or by a PnP aware BIOS. If you are using isapnp then you need to compile this driver as a module and then load it using insmod after isapnp has run. The parameters of the configured card(s) should be passed to the driver. The format is: insmod sym53c416 sym53c416=, [sym53c416_1=,] There is support for up to four adapters. If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called sym53c416.o. Tekram DC390(T) and Am53/79C974 (PCscsi) SCSI support CONFIG_SCSI_DC390T This driver supports PCI SCSI host adapters based on the Am53C974A chip, e.g. Tekram DC390(T), DawiControl 2974 and some onboard PCscsi/PCnet (Am53/79C974) solutions. Documentation can be found in linux/drivers/scsi/README.tmscsim. Note that this driver does NOT support Tekram DC390W/U/F, which are based on NCR/Symbios chips. Use "NCR53C8XX SCSI support" for those. Also note that there is another generic Am53C974 driver, "AM53/79C974 PCI SCSI support" below. You can pick either one. If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called tmscsim.o. Omit support for other Am53/79C974 based SCSI adapters CONFIG_SCSI_DC390T_NOGENSUPP If you say N here, the DC390(T) SCSI driver relies on the DC390 EEPROM to get initial values for its settings, such as speed, termination, etc. If it can't find this EEPROM, it will use defaults or the user supplied boot/module parameters. For details on driver configuration see linux/drivers/scsi/README.tmscsim. If you say Y here and if no EEPROM is found, the driver gives up and thus only supports Tekram DC390(T) adapters. This can be useful if you have a DC390(T) and another Am53C974 based adapter, which, for some reason, you want to drive with the other AM53C974 driver. If unsure, say N. AM53/79C974 PCI SCSI support CONFIG_SCSI_AM53C974 This is support for the AM53/79C974 SCSI host adapters. Please read drivers/scsi/README.AM53C974 for details. Also, the SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto , is for you. Note that there is another driver for AM53C974 based adapters: "Tekram DC390(T) and Am53/79C974 (PCscsi) SCSI support", above. You can pick either one. If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called AM53C974.o. AMI MegaRAID support CONFIG_SCSI_MEGARAID This driver supports the AMI MegaRAID 418, 428, 438, 466, 762, 490 and 467 SCSI host adapters. If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called megaraid.o. GDT SCSI Disk Array Controller support CONFIG_SCSI_GDTH This is a driver for all SCSI Disk Array Controllers (EISA/ISA/PCI) manufactured by ICP vortex. It is documented in the kernel source in drivers/scsi/gdth.c and drivers/scsi/gdth.h. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. IOMEGA parallel port (ppa - older drives) CONFIG_SCSI_PPA This driver supports older versions of IOMEGA's parallel port ZIP drive (a 100 MB removable media device). Note that you can say N here if you have the SCSI version of the ZIP drive: it will be supported automatically if you said Y to the generic "SCSI disk support", above. If you have the ZIP Plus drive or a more recent parallel port ZIP drive (if the supplied cable with the drive is labeled "AutoDetect") then you should say N here and Y to "IOMEGA parallel port (imm - newer drives)", below. For more information about this driver and how to use it you should read the file drivers/scsi/README.ppa. You should also read the SCSI-HOWTO, which is available from http://www.linuxdoc.org/docs.html#howto . If you use this driver, you will still be able to use the parallel port for other tasks, such as a printer; it is safe to compile both drivers into the kernel. This driver is also available as a module which can be inserted in and removed from the running kernel whenever you want. To compile this driver as a module, say M here and read Documentation/modules.txt. The module will be called ppa.o. IOMEGA parallel port (imm - newer drives) CONFIG_SCSI_IMM This driver supports newer versions of IOMEGA's parallel port ZIP drive (a 100 MB removable media device). Note that you can say N here if you have the SCSI version of the ZIP drive: it will be supported automatically if you said Y to the generic "SCSI disk support", above. If you have the ZIP Plus drive or a more recent parallel port ZIP drive (if the supplied cable with the drive is labeled "AutoDetect") then you should say Y here; if you have an older ZIP drive, say N here and Y to "IOMEGA Parallel Port (ppa - older drives)", above. For more information about this driver and how to use it you should read the file drivers/scsi/README.ppa. You should also read the SCSI-HOWTO, which is available from http://metalab.unc.edu/mdw/linux.html#howto . If you use this driver, you will still be able to use the parallel port for other tasks, such as a printer; it is safe to compile both drivers into the kernel. This driver is also available as a module which can be inserted in and removed from the running kernel whenever you want. To compile this driver as a module, say M here and read Documentation/modules.txt. The module will be called imm.o. Force the Iomega ZIP drivers to use EPP-16 CONFIG_SCSI_IZIP_EPP16 EPP (Enhanced Parallel Port) is a standard for parallel ports which allows them to act as expansion buses that can handle up to 64 peripheral devices. Some parallel port chipsets are slower than their motherboard, and so we have to control the state of the chipset's FIFO queue every now and then to avoid data loss. This will be done if you say Y here. Generally, saying Y is the safe option and slows things down a bit. Assume slow parallel port control register CONFIG_SCSI_IZIP_SLOW_CTR Some parallel ports are known to have excessive delays between changing the parallel port control register and good data being available on the parallel port data/status register. This option forces a small delay (1.0 usec to be exact) after changing the control register to let things settle out. Enabling this option may result in a big drop in performance but some very old parallel ports (found in 386 vintage machines) will not work properly. Generally, saying N is fine. SCSI Debug host simulator. (EXPERIMENTAL) CONFIG_SCSI_DEBUG This is a host adapter simulator that can be programmed to simulate a large number of conditions that could occur on a real bus. The advantage is that many hard to reproduce problems can be tested in a controlled environment where there is reduced risk of losing important data. This is primarily of use to people trying to debug the middle and upper layers of the SCSI subsystem. If unsure, say N. Fibre Channel support CONFIG_FC4 This is an experimental support for storage arrays connected to the system using Fibre Optic and the "X3.269-199X Fibre Channel Protocol for SCSI" specification. You'll also need the generic SCSI support, as well as the drivers for the storage array itself and for the interface adapter such as SOC. This subsystem could even serve for IP networking, with some code extensions. If unsure, say N. Sun SOC CONFIG_FC4_SOC Serial Optical Channel is an interface card with one or two Fibre Optic ports, each of which can be connected to a disk array. Only the SBus incarnation of the adapter is supported at the moment. SparcSTORAGE Array 100 and 200 series CONFIG_SCSI_PLUTO If you never bought a disk array made by Sun, go with N. AcornSCSI support CONFIG_SCSI_ACORNSCSI_3 This enables support for the Acorn SCSI card (aka30). If you have an Acorn system with one of these, say Y. If unsure, say N. Acorn SCSI tagged queue support CONFIG_SCSI_ACORNSCSI_TAGGED_QUEUE Say Y here to enable tagged queuing support on the Acorn SCSI card. This is a feature of SCSI-2 which improves performance: the host adapter can send several SCSI commands to a device's queue even if previous commands haven't finished yet. Some SCSI devices don't implement this properly, so the safe answer is N. Acorn SCSI Synchronous transfers support CONFIG_SCSI_ACORNSCSI_SYNC Say Y here to enable synchronous transfer negotiation with all targets on the Acorn SCSI card. In general, this improves performance; however some SCSI devices don't implement it properly, so the safe answer is N. Oak SCSI support CONFIG_SCSI_OAK1 This enables support for the Oak SCSI card. If you have an Acorn system with one of these, say Y. If unsure, say N. Cumana SCSI I support CONFIG_SCSI_CUMANA_1 This enables support for the Cumana SCSI I card. If you have an Acorn system with one of these, say Y. If unsure, say N. Cumana SCSI II support (EXPERIMENTAL) CONFIG_SCSI_CUMANA_2 This enables support for the Cumana SCSI II card. If you have an Acorn system with one of these, say Y. If unsure, say N. EcoSCSI support CONFIG_SCSI_ECOSCSI This enables support for the EcoSCSI card -- a small card that sits in the Econet socket. If you have an Acorn system with one of these, say Y. If unsure, say N. EESOX SCSI support (EXPERIMENTAL) CONFIG_SCSI_EESOXSCSI This enables support for the EESOX SCSI card. If you have an Acorn system with one of these, say Y, otherwise say N. Powertec SCSI support (EXPERIMENTAL) CONFIG_SCSI_POWERTECSCSI This enables support for the Powertec SCSI card on Acorn systems. If you have one of these, say Y. If unsure, say N. Network device support? CONFIG_NETDEVICES You can say N here if you don't intend to connect your Linux box to any other computer at all or if all your connections will be over a telephone line with a modem either via UUCP (UUCP is a protocol to forward mail and news between unix hosts over telephone lines; read the UUCP-HOWTO, available from http://www.linuxdoc.org/docs.html#howto ) or dialing up a shell account or a BBS, even using term (term is a program which gives you almost full Internet connectivity if you have a regular dial up shell account on some Internet connected Unix computer. Read http://www.bart.nl/~patrickr/term-howto/Term-HOWTO.html ). You'll have to say Y if your computer contains a network card that you want to use under Linux (make sure you know its name because you will be asked for it and read the Ethernet-HOWTO (especially if you plan to use more than one network card under Linux)) or if you want to use SLIP (Serial Line Internet Protocol is the protocol used to send Internet traffic over telephone lines or null modem cables) or CSLIP (compressed SLIP) or PPP (Point to Point Protocol, a better and newer replacement for SLIP) or PLIP (Parallel Line Internet Protocol is mainly used to create a mini network by connecting the parallel ports of two local machines) or AX.25/KISS (protocol for sending Internet traffic over amateur radio links). Make sure to read the NET-3-HOWTO. Eventually, you will have to read Olaf Kirch's excellent and free book "Network Administrator's Guide", to be found in ftp://metalab.unc.edu/pub/Linux/docs/LDP . If unsure, say Y. Dummy net driver support CONFIG_DUMMY This is essentially a bit-bucket device (i.e. traffic you send to this device is consigned into oblivion) with a configurable IP address. It is most commonly used in order to make your currently inactive SLIP address seem like a real address for local programs. If you use SLIP or PPP, you might want to say Y here. Since this thing often comes in handy, the default is Y. It won't enlarge your kernel either. What a deal. Read about it in the Network Administrator's Guide, available from http://metalab.unc.edu/mdw/linux.html#guide . If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called dummy.o. If you want to use more than one dummy device at a time, you need to compile this driver as a module. Instead of 'dummy', the devices will then be called 'dummy0', 'dummy1' etc. SLIP (serial line) support CONFIG_SLIP Say Y if you intend to use SLIP or CSLIP (compressed SLIP) to connect to your Internet service provider or to connect to some other local Unix box or if you want to configure your Linux box as a Slip/CSlip server for other people to dial in. SLIP (Serial Line Internet Protocol) is a protocol used to send Internet traffic over serial connections such as telephone lines or null modem cables; nowadays, the protocol PPP is more commonly used for this same purpose. Normally, your access provider has to support SLIP in order for you to be able to use it, but there is now a SLIP emulator called SLiRP around (available via FTP (user: anonymous) from ftp://metalab.unc.edu/pub/Linux/system/network/serial/ ) which allows you to use SLIP over a regular dial up shell connection. If you plan to use SLiRP, make sure to say Y to CSLIP, below. The NET-3-HOWTO, available from http://www.linuxdoc.org/docs.html#howto , explains how to configure SLIP. Note that you don't need this option if you just want to run term (term is a program which gives you almost full Internet connectivity if you have a regular dial up shell account on some Internet connected Unix computer. Read http://www.bart.nl/~patrickr/term-howto/Term-HOWTO.html ). SLIP support will enlarge your kernel by about 4 KB. If unsure, say N. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. The module will be called slip.o. CSLIP compressed headers CONFIG_SLIP_COMPRESSED This protocol is faster than SLIP because it uses compression on the TCP/IP headers (not on the data itself), but it has to be supported on both ends. Ask your access provider if you are not sure and answer Y, just in case. You will still be able to use plain SLIP. If you plan to use SLiRP, the SLIP emulator (available from ftp://metalab.unc.edu/pub/Linux/system/network/serial/ ) which allows you to use SLIP over a regular dial up shell connection, you definitely want to say Y here. The NET-3-HOWTO, available from http://www.linuxdoc.org/docs.html#howto , explains how to configure CSLIP. This won't enlarge your kernel. Keepalive and linefill CONFIG_SLIP_SMART Adds additional capabilities to the SLIP driver to support the RELCOM line fill and keepalive monitoring. Ideal on poor quality analogue lines. Six bit SLIP encapsulation CONFIG_SLIP_MODE_SLIP6 Just occasionally you may need to run IP over hostile serial networks that don't pass all control characters or are only seven bit. Saying Y here adds an extra mode you can use with SLIP: "slip6". In this mode, SLIP will only send normal ASCII symbols over the serial device. Naturally, this has to be supported at the other end of the link as well. It's good enough, for example, to run IP over the async ports of a Camtec JNT Pad. If unsure, say N. PPP (point-to-point protocol) support CONFIG_PPP PPP (Point to Point Protocol) is a newer and better SLIP. It serves the same purpose: sending Internet traffic over telephone (and other serial) lines. Ask your access provider if they support it, because otherwise you can't use it; most internet access providers these days support PPP rather than SLIP. To use PPP, you need an additional program called pppd as described in Documentation/networking/ppp.txt and in the PPP-HOWTO, available at http://www.linuxdoc.org/docs.html#howto . If you upgrade from an older kernel, you might need to upgrade pppd as well. The PPP option enlarges your kernel by about 16 KB. There are actually two versions of PPP: the traditional PPP for asynchronous lines, such as regular analog phone lines, and synchronous PPP which can be used over digital ISDN lines for example. If you want to use PPP over phone lines or other asynchronous serial lines, you need to say Y (or M) here and also to the next option, "PPP support for async serial ports". For PPP over synchronous lines, you should say Y (or M) here and to "Support synchronous PPP", below. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). If you said Y to "Version information on all symbols" above, then you cannot compile the PPP driver into the kernel; you can then only compile it as a module. The module will be called ppp_generic.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. PPP support for async serial ports CONFIG_PPP_ASYNC Say Y (or M) here if you want to be able to use PPP over standard asynchronous serial ports, such as COM1 or COM2 on a PC. If you use a modem (not a synchronous or ISDN modem) to contact your ISP, you need this option. This code is also available as a module (code which can be inserted into and removed from the running kernel). If you want to compile it as a module, say M here and read Documentation/modules.txt. CONFIG_PPP_SYNC_TTY Say Y (or M) here if you want to be able to use PPP over synchronous (HDLC) tty devices, such as the SyncLink adapter. These devices are often used for high-speed leased lines like T1/E1. This code is also available as a module (code which can be inserted into and removed from the running kernel). If you want to compile it as a module, say M here and read Documentation/modules.txt. PPP Deflate compression CONFIG_PPP_DEFLATE Support for the Deflate compression method for PPP, which uses the Deflate algorithm (the same algorithm that gzip uses) to compress each PPP packet before it is sent over the wire. The machine at the other end of the PPP link (usually your ISP) has to support the Deflate compression method as well for this to be useful. Even if they don't support it, it is safe to say Y here. This code is also available as a module (code which can be inserted into and removed from the running kernel). If you want to compile it as a module, say M here and read Documentation/modules.txt. PPP BSD-Compress compression CONFIG_PPP_BSDCOMP Support for the BSD-Compress compression method for PPP, which uses the LZW compression method to compress each PPP packet before it is sent over the wire. The machine at the other end of the PPP link (usually your ISP) has to support the BSD-Compress compression method as well for this to be useful. Even if they don't support it, it is safe to say Y here. The PPP Deflate compression method ("PPP Deflate compression", above) is preferable to BSD-Compress, because it compresses better and is patent-free. Note that the BSD compression code will always be compiled as a module; it is called bsd_comp.o and will show up in the directory modules once you have said "make modules". If unsure, say N. Wireless LAN (non-hamradio) CONFIG_NET_RADIO Support for wireless LANs and everything having to do with radio, but not with amateur radio. Note that the answer to this question won't directly affect the kernel: saying N will just cause this configure script to skip all the questions about radio interfaces. Some user-level drivers for scarab devices which don't require special kernel support are available from ftp://shadow.cabi.net/pub/Linux . STRIP (Metricom Starmode radio IP) CONFIG_STRIP Say Y if you have a Metricom radio and intend to use Starmode Radio IP. STRIP is a radio protocol developed for the MosquitoNet project (on the WWW at http://mosquitonet.stanford.edu/ ) to send Internet traffic using Metricom radios. Metricom radios are small, battery powered, 100kbit/sec packet radio transceivers, about the size and weight of a cellular telephone. (You may also have heard them called "Metricom modems" but we avoid the term "modem" because it misleads many people into thinking that you can plug a Metricom modem into a phone line and use it as a modem.) You can use STRIP on any Linux machine with a serial port, although it is obviously most useful for people with laptop computers. If you think you might get a Metricom radio in the future, there is no harm in saying Y to STRIP now, except that it makes the kernel a bit bigger. You can also compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called strip.o. AT&T WaveLAN & DEC RoamAbout DS support CONFIG_WAVELAN The Lucent WaveLAN (formerly NCR and AT&T; or DEC RoamAbout DS) is a Radio LAN (wireless Ethernet-like Local Area Network) using the radio frequencies 900 MHz and 2.4 GHz. This driver support the ISA version of the WaveLAN card. A separate driver for the PCMCIA (PC-card) hardware is available in David Hinds' pcmcia-cs package (see the file Documentation/Changes for location). If you want to use an ISA WaveLAN card under Linux, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . Some more specific information is contained in Documentation/networking/wavelan.txt and in the source code drivers/net/wavelan.p.h. You will also need the wireless tools package available from ftp://hyper.stanford.edu/pub/pcmcia/contrib/ . Please read the man pages contained therein. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called wavelan.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. Aironet Arlan 655 & IC2200 DS support CONFIG_ARLAN Aironet makes Arlan, a class of wireless LAN adapters. These use the www.Telxon.com chip, which is also used on several similar cards. This driver is tested on the 655 and IC2200 series cards. Look at http://www.ylenurme.ee/~elmer/655/ for latest information. The driver is built as two modules, arlan and arlan-proc. The latter is the /proc interface and is not needed most of time. On some computers the card ends up in non-valid state after some time. Use a ping-reset script to clear it. Aironet 4500/4800 series adapters CONFIG_AIRONET4500 www.aironet.com (recently bought by Cisco) makes these 802.11 DS adapters. Driver by Elmer Joandi (elmer@ylenurme.ee). Work sponsored by www.spectrumwireless.net and www.vendomar.ee This configuration option enables common code for all devices (PCI, ISA, PCMCIA) module is aironet4500_core quickconfig parameters: SSID=tsunami - "The Password" adhoc=1 there are no Access Points around master=1 Adhoc master (the one who creates network sync) slave=1 Adhoc slave(btw, it is still forming own net sometimes) channel=1..? meaningful in adhoc mode all other parameters can be set via proc interface These parameters belong to .._card module, but alas, they are here if you have problems with screwin up card, both_bap_lock=1 is conservative value (performance hit 15%) for any other configuration options look at ..._proc module Aironet 4500/4800 ISA/PCI/PNP/365 support CONFIG_AIRONET4500_NONCS This is module aironet4500_card, which includes _possibility_ to support for following PCI device ISA device in ISA mode(does not work currently) ISA device in PNP mode PCMCIA device _without_ cardservices, direct 365 chip INIT, does not work currently PCMCIA _with_ CardServices(normal way) is at another module radio parameters are currently configurable at ..._core module Aironet 4500/4800 PNP support CONFIG_AIRONET4500_PNP This option should be enabled for ISA cards, remember to enable PNP jumper on board. module aironet4500_card Aironet 4500/4800 PCI support CONFIG_AIRONET4500_PCI This option should be enabled for PCI cards module aironet4500_card Aironet 4500/4800 ISA broken support (EXPERIMENTAL) CONFIG_AIRONET4500_ISA This option enables support for ISA cards in non-PNP mode. Does not operate correctly by now. module aironet4500_card Aironet 4500/4800 I365 broken support (EXPERIMENTAL) CONFIG_AIRONET4500_I365 This option enables support for PCMCIA cards on i365 controller _without_ cardservices. Doesnt have much sense and is not working properly. Comes from times where there was no PCMCIA support in kernel main source tree Aironet 4500/4800 PCMCIA support CONFIG_AIRONET4500_CS This option enables support for PCMCIA cards to be used with CardServices. This is not for ISA and PCI adapters. module aironet4500_cs.o The same option is both on: 1. PCMCIA netdevices configuring panel 2. Wireless netdevices configuring panel Possibility to change this option depeds on options set in 2. Aironet 4500/4800 PROC interface CONFIG_AIRONET4500_PROC This option enables /proc/sys/aironet4500 interface for configuring the device. NOTE: it takes lot of memory. Compile it as module and remove after configuration module: aironet4500_proc additional info: look into drivers/net/aironet4500_rids.c this is quite human-readable(no need to know C) LAPB over Ethernet driver CONFIG_LAPBETHER This is a driver for a pseudo device (typically called /dev/lapb0) which allows you to open an LAPB point-to-point connection to some other computer on your Ethernet network. In order to do this, you need to say Y or M to the driver for your Ethernet card as well as to "LAPB Data Link Driver". If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called lapbether.o. If unsure, say N. X.25 async driver CONFIG_X25_ASY This is a driver for sending and receiving X.25 frames over regular asynchronous serial lines such as telephone lines equipped with ordinary modems. Experts should note that this driver doesn't currently comply with the asynchronous HDLS framing protocols in CCITT recommendation X.25. If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called x25_asy.o. If unsure, say N. PCMCIA network device support CONFIG_NET_PCMCIA Say Y if you would like to include support for any PCMCIA network adapters. If unsure, say N. 3Com 3c589 PCMCIA support CONFIG_PCMCIA_3C589 Say Y here if you intend to attach a 3Com 3c589 or compatible PCMCIA (PC-card) Ethernet card to your computer. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called 3c589_cs.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. If unsure, say N. 3Com 3c574 PCMCIA support CONFIG_PCMCIA_3C574 Say Y here if you intend to attach a 3Com 3c574 or compatible PCMCIA (PC-card) Fast Ethernet card to your computer. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called 3c574_cs.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. If unsure, say N. Fujitsu FMV-J18x PCMCIA support CONFIG_PCMCIA_FMVJ18X Say Y here if you intend to attach a Fujitsu FMV-J18x or compatible PCMCIA (PC-card) Ethernet card to your computer. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called fmvj18x_cs.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. If unsure, say N. NE2000 compatible PCMCIA support CONFIG_PCMCIA_PCNET Say Y here if you intend to attach an NE2000 compatible PCMCIA (PC-card) Ethernet or Fast Ethernet card to your computer. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called pcnet_cs.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. If unsure, say N. New Media PCMCIA support CONFIG_PCMCIA_NMCLAN Say Y here if you intend to attach a New Media Ethernet or LiveWire PCMCIA (PC-card) Ethernet card to your computer. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called nmclan_cs.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. If unsure, say N. SMC 91Cxx PCMCIA support CONFIG_PCMCIA_SMC91C92 Say Y here if you intend to attach an SMC 91Cxx compatible PCMCIA (PC-card) Ethernet or Fast Ethernet card to your computer. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called smc91c92_cs.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. If unsure, say N. Xircom 16-bit PCMCIA support CONFIG_PCMCIA_XIRC2PS Say Y here if you intend to attach a Xircom 16-bit PCMCIA (PC-card) Ethernet or Fast Ethernet card to your computer. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called xirc2ps_cs.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. If unsure, say N. 3Com 3c575 CardBus support CONFIG_PCMCIA_3C575 This driver supports the 3Com 3c575 series of CardBus Fast Ethernet adapters. This driver can only be compiled as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called 3c575_cb.o. If you want to do that, say M here and read Documentation/modules.txt. If unsure, say N. DEC Tulip CardBus support CONFIG_PCMCIA_TULIP This driver supports CardBus Fast Ethernet adapters based on DEC Tulip and compatible chipsets. This driver can only be compiled as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called tulip_cb.o. If you want to do that, say M here and read Documentation/modules.txt. If unsure, say N. SMC EPIC CardBus support CONFIG_PCMCIA_EPIC100 This driver supports CardBus Fast Ethernet adapters based on the SMC EPIC chipset. This driver can only be compiled as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called epic100_cb.o. If you want to do that, say M here and read Documentation/modules.txt. If unsure, say N. Aviator/Raytheon 2.4MHz wireless support CONFIG_PCMCIA_RAYCS Say Y here if you intend to attach an Aviator/Raytheon PCMCIA (PC-card) wireless Ethernet networking card to your computer. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called ray_cs.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. If unsure, say N. Xircom Netwave AirSurfer wireless support CONFIG_PCMCIA_NETWAVE Say Y here if you intend to attach a Xircom Netwave AirSurfer PCMCIA (PC-card) wireless Ethernet networking card to your computer. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called netwave_cs.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. If unsure, say N. AT&T/Lucent Wavelan wireless support CONFIG_PCMCIA_WAVELAN Say Y here if you intend to attach an AT&T/Lucent Wavelan PCMCIA (PC-card) wireless Ethernet networking card to your computer. This driver is for the non-IEEE-802.11 Wavelan cards. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called wavelan_cs.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. If unsure, say N. PLIP (parallel port) support CONFIG_PLIP PLIP (Parallel Line Internet Protocol) is used to create a reasonably fast mini network consisting of two (or, rarely, more) local machines. A PLIP link from a Linux box is a popular means to install a Linux distribution on a machine which doesn't have a CDROM drive (a minimal system has to be transferred with floppies first). The kernels on both machines need to have this PLIP option enabled for this to work. The PLIP driver has two modes, mode 0 and mode 1. The parallel ports (the connectors at the computers with 25 holes) are connected with "null printer" or "Turbo Laplink" cables which can transmit 4 bits at a time (mode 0) or with special PLIP cables, to be used on bidirectional parallel ports only, which can transmit 8 bits at a time (mode 1); you can find the wiring of these cables in Documentation/networking/PLIP.txt. The cables can be up to 15m long. Mode 0 works also if one of the machines runs DOS/Windows and has some PLIP software installed, e.g. the Crynwr PLIP packet driver (http://oak.oakland.edu/simtel.net/msdos/pktdrvr-pre.html ) and winsock or NCSA's telnet. If you want to use PLIP, say Y and read the PLIP mini-HOWTO as well as the NET-3-HOWTO, both available from http://www.linuxdoc.org/docs.html#howto . Note that the PLIP protocol has been changed and this PLIP driver won't work together with the PLIP support in Linux versions 1.0.x. This option enlarges your kernel by about 8 KB. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. The module will be called plip.o. If unsure, say Y or M, in case you buy a laptop later. EQL (serial line load balancing) support CONFIG_EQUALIZER If you have two serial connections to some other computer (this usually requires two modems and two telephone lines) and you use SLIP (the protocol for sending Internet traffic over telephone lines) or PPP (a better SLIP) on them, you can make them behave like one double speed connection using this driver. Naturally, this has to be supported at the other end as well, either with a similar EQL Linux driver or with a Livingston Portmaster 2e. Say Y if you want this and read Documentation/networking/eql.txt. You may also want to read section 6.2 of the NET-3-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called eql.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. If unsure, say N. Ethertap network tap (EXPERIMENTAL) CONFIG_ETHERTAP If you say Y here (and have said Y to "Kernel/User network link driver", above) and create a character special file /dev/tap0 with major number 36 and minor number 16 using mknod ("man mknod"), you will be able to have a user space program read and write raw Ethernet frames from/to that special file. tap0 can be configured with ifconfig and route like any other Ethernet device but it is not connected to any physical LAN; everything written by the user to /dev/tap0 is treated by the kernel as if it had come in from a LAN to the device tap0; everything the kernel wants to send out over the device tap0 can instead be read by the user from /dev/tap0: the user mode program replaces the LAN that would be attached to an ordinary Ethernet device. Please read the file Documentation/networking/ethertap.txt for more information. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called ethertap.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. If you don't know what to use this for, you don't need it. Sealevel Systems 4021 support CONFIG_SEALEVEL_4021 This is a driver for the Sealevel Systems ACB 56 serial I/O adapter. This driver can only be compiled as a module ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to do that, say M here. The module will be called sealevel.o. Frame Relay (DLCI) support CONFIG_DLCI This is support for the frame relay protocol; frame relay is a fast low-cost way to connect to a remote Internet access provider or to form a private wide area network. The one physical line from your box to the local "switch" (i.e. the entry point to the frame relay network, usually at the phone company) can carry several logical point-to-point connections to other computers connected to the frame relay network. For a general explanation of the protocol, check out http://www.frforum.com/ on the WWW. To use frame relay, you need supporting hardware (called FRAD) and certain programs from the net-tools package as explained in Documentation/networking/framerelay.txt. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called dlci.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Max open DLCI CONFIG_DLCI_COUNT This is the maximal number of logical point-to-point frame relay connections (the identifiers of which are called DCLIs) that the driver can handle. The default is probably fine. Max DLCI per device CONFIG_DLCI_MAX You can specify here how many logical point-to-point frame relay connections (the identifiers of which are called DCLIs) should be handled by each of your hardware frame relay access devices. Go with the default. Sangoma S502A FRAD support CONFIG_SDLA Say Y here if you need a driver for the Sangoma S502A, S502E, and S508 Frame Relay Access Devices. These are multi-protocol cards, but only frame relay is supported by the driver at this time. Please read Documentation/framerelay.txt. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called sdla.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Acorn Econet/AUN protocols (EXPERIMENTAL) CONFIG_ECONET Econet is a fairly old and slow networking protocol mainly used by Acorn computers to access file and print servers. It uses native Econet network cards. AUN is an implementation of the higher level parts of Econet that runs over ordinary Ethernet connections, on top of the UDP packet protocol, which in turn runs on top of the Internet protocol IP. If you say Y here, you can choose with the next two options whether to send Econet/AUN traffic over a UDP Ethernet connection or over a native Econet network card. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called econet.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. AUN over UDP CONFIG_ECONET_AUNUDP Say Y here if you want to send Econet/AUN traffic over a UDP connection (UDP is a packet based protocol that runs on top of the Internet protocol IP) using an ordinary Ethernet network card. Native Econet CONFIG_ECONET_NATIVE Say Y here if you have a native Econet network card installed in your computer. WAN Router CONFIG_WAN_ROUTER Wide Area Networks (WANs), such as X.25, frame relay and leased lines, are used to interconnect Local Area Networks (LANs) over vast distances with data transfer rates significantly higher than those achievable with commonly used asynchronous modem connections. Usually, a quite expensive external device called a `WAN router' is needed to connect to a WAN. As an alternative, WAN routing can be built into the Linux kernel. With relatively inexpensive WAN interface cards available on the market, a perfectly usable router can be built for less than half the price of an external router. If you have one of those cards and wish to use your Linux box as a WAN router, say Y here and also to the WAN driver for your card, below. You will then need the wan-tools package which is available from ftp://ftp.sangoma.com . Read Documentation/networking/wan-router.txt for more information. The WAN routing support is also available as a module called wanrouter.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. If unsure, say N. Fast switching (read help!) CONFIG_NET_FASTROUTE Saying Y here enables direct NIC-to-NIC (NIC = Network Interface Card) data transfers on the local network, which is fast. IMPORTANT NOTE: This option is NOT COMPATIBLE with "Network packet filtering" (CONFIG_NETFILTER). Say N here if you say Y there. However, it will work with all options in the "IP: advanced router" section (except for "IP: use TOS value as routing key" and "IP: use FWMARK value as routing key"). At the moment, few devices support fast switching (tulip is one of them, a modified 8390 driver can be found at ftp://ftp.inr.ac.ru/ip-routing/fastroute/fastroute-8390.tar.gz ). If unsure, say N. Forwarding between high speed interfaces CONFIG_NET_HW_FLOWCONTROL This option enables NIC (Network Interface Card) hardware throttling during periods of extremal congestion. At the moment only a couple of device drivers support it (really only one -- tulip, a modified 8390 driver can be found at ftp://ftp.inr.ac.ru/ip-routing/fastroute/fastroute-8390.tar.gz ). Really, this option is applicable to any machine attached to a fast enough network, and even a 10 Mb NIC is able to kill a not very slow box, such as a 120MHz Pentium. However, do not say Y here if you did not experience any serious problems. QoS and/or fair queueing CONFIG_NET_SCHED When the kernel has several packets to send out over a network device, it has to decide which ones to send first, which ones to delay, and which ones to drop. This is the job of the packet scheduler, and several different algorithms for how to do this "fairly" have been proposed. If you say N here, you will get the standard packet scheduler, which is a FIFO (first come, first served). If you say Y here, you will be able to choose from among several alternative algorithms which can then be attached to different network devices. This is useful for example if some of your network devices are real time devices that need a certain minimum data flow rate, or if you need to limit the maximum data flow rate for traffic which matches specified criteria. This code is considered to be experimental. To administer these schedulers, you'll need the user-level utilities from the package iproute2+tc at ftp://ftp.inr.ac.ru/ip-routing/ . That package also contains some documentation; for more, check out http://snafu.freedom.org/linux2.2/iproute-notes.html . If you say Y here and to "/proc filesystem" below, you will be able to read status information about packet schedulers from the file /proc/net/psched. The available schedulers are listed in the following questions; you can say Y to as many as you like. If unsure, say N now. CBQ packet scheduler CONFIG_NET_SCH_CBQ Say Y here if you want to use the Class-Based Queueing (CBQ) packet scheduling algorithm for some of your network devices. This algorithm classifies the waiting packets into a tree-like hierarchy of classes; the leaves of this tree are in turn scheduled by separate algorithms (called "disciplines" in this context). See the top of net/sched/sch_cbq.c for references about the CBQ algorithm. CBQ is a commonly used scheduler, so if you're unsure, you should say Y here. Then say Y to all the queueing algorithms below that you want to use as CBQ disciplines. Then say Y to "Packet classifier API" and say Y to all the classifiers you want to use; a classifier is a routine that allows you to sort your outgoing traffic into classes based on a certain criterion. This code is also available as a module called sch_cbq.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. CSZ packet scheduler CONFIG_NET_SCH_CSZ Say Y here if you want to use the Clark-Shenker-Zhang (CSZ) packet scheduling algorithm for some of your network devices. At the moment, this is the only algorithm that can guarantee service for real-time applications (see the top of net/sched/sch_csz.c for details and references about the algorithm). Note: this scheduler is currently broken. This code is also available as a module called sch_csz.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. #ATM pseudo-scheduler #CONFIG_NET_SCH_ATM # # ??? # The simplest PRIO pseudo scheduler CONFIG_NET_SCH_PRIO Say Y here if you want to use an n-band priority queue packet "scheduler" for some of your network devices or as a leaf discipline for the CBQ scheduling algorithm. If unsure, say Y. This code is also available as a module called sch_prio.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. RED queue CONFIG_NET_SCH_RED Say Y here if you want to use the Random Early Detection (RED) packet scheduling algorithm for some of your network devices (see the top of net/sched/sch_red.c for details and references about the algorithm). This code is also available as a module called sch_red.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. SFQ queue CONFIG_NET_SCH_SFQ Say Y here if you want to use the Stochastic Fairness Queueing (SFQ) packet scheduling algorithm for some of your network devices or as a leaf discipline for the CBQ scheduling algorithm (see the top of net/sched/sch_sfq.c for details and references about the SFQ algorithm). This code is also available as a module called sch_sfq.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. TEQL queue CONFIG_NET_SCH_TEQL Say Y here if you want to use the True Link Equalizer (TLE) packet scheduling algorithm for some of your network devices or as a leaf discipline for the CBQ scheduling algorithm. This queueing discipline allows the combination of several physical devices into one virtual device. (see the top of net/sched/sch_teql.c for details). This code is also available as a module called sch_teql.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. TBF queue CONFIG_NET_SCH_TBF Say Y here if you want to use the Simple Token Bucket Filter (TBF) packet scheduling algorithm for some of your network devices or as a leaf discipline for the CBQ scheduling algorithm (see the top of net/sched/sch_tbf.c for a description of the TBF algorithm). This code is also available as a module called sch_tbf.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. QoS support CONFIG_NET_QOS Say Y here if you want to include Quality Of Service scheduling features, which means that you will be able to request certain rate-of-flow limits for your network devices. Note that the answer to this question won't directly affect the kernel: saying N will just cause this configure script to skip all the questions about QoS support. Rate estimator CONFIG_NET_ESTIMATOR In order for Quality of Service scheduling to work, the current rate-of-flow for a network device has to be estimated; if you say Y here, the kernel will do just that. Packet classifier API CONFIG_NET_CLS The CBQ scheduling algorithm requires that network packets which are scheduled to be sent out over a network device be classified according to some criterion. If you say Y here, you will get a choice of several different packet classifiers with the following questions. Routing tables based classifier CONFIG_NET_CLS_ROUTE If you say Y here, you will be able to classify outgoing packets according to the route table entry they matched. If unsure, say Y. This code is also available as a module called cls_route.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. Firewall based classifier CONFIG_NET_CLS_FW If you say Y here, you will be able to classify outgoing packets according to firewall criteria you specified. This code is also available as a module called cls_fw.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. U32 classifier CONFIG_NET_CLS_U32 If you say Y here, you will be able to classify outgoing packets according to their destination address. If unsure, say Y. This code is also available as a module called cls_u32.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt Special RSVP classifier CONFIG_NET_CLS_RSVP The Resource Reservation Protocol (RSVP) permits end systems to request a minimum and maximum data flow rate for a connection; this is important for real time data such as streaming sound or video. Say Y here if you want to be able to classify outgoing packets based on their RSVP requests. This code is also available as a module called cls_rsvp.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt Special RSVP classifier for IPv6 CONFIG_NET_CLS_RSVP6 The Resource Reservation Protocol (RSVP) permits end systems to request a minimum and maximum data flow rate for a connection; this is important for real time data such as streaming sound or video. Say Y here if you want to be able to classify outgoing packets based on their RSVP requests and you are using the new Internet Protocol IPv6 as opposed to the older and more common IPv4. This code is also available as a module called cls_rsvp6.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt # # Ingres traffic policing # CONFIG_NET_CLS_POLICE ### ### Some expert please fill these in ### Network code profiler CONFIG_NET_PROFILE If you say Y here and to "/proc filesystem support" below, some obscure and undocumented information about the network code's performance will be written to /proc/net/profile. If you don't know what it is about, you don't need it: say N. Comtrol Hostess SV-11 support CONFIG_HOSTESS_SV11 This is a network card for low speed synchronous serial links, at up to 256Kbps. It supports both PPP and Cisco HDLC. At this point, the driver can only be compiled as a module. COSA/SRP sync serial boards support CONFIG_COSA This is a driver for COSA and SRP synchronous serial boards. These boards allow to connect synchronous serial devices (for example base-band modems, or any other device with the X.21, V.24, V.35 or V.36 interface) to your Linux box. The cards can work as the character device, synchronous PPP network device, or the Cisco HDLC network device. To actually use the COSA or SRP board, you will need user-space utilities for downloading the firmware to the cards and to set them up. Look at the http://www.fi.muni.cz/~kas/cosa/ for more information about the cards (including the pointer to the user-space utilities). You can also read the comment at the top of the drivers/net/cosa.c for details about the cards and the driver itself. The driver will be compiled as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called cosa.o. For general information about modules read Documentation/modules.txt. # Fibre Channel driver support # CONFIG_NET_FC # Interphase 5526 Tachyon chipset based adaptor support # CONFIG_IPHASE5526 Red Creek Hardware VPN (EXPERIMENTAL) CONFIG_RCPCI This is a driver for hardware which provides a Virtual Private Network (VPN). Say Y if you have it. This code is also available as a module called rcpci.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. SBNI Leased Line Adapters CONFIG_SBNI This is a driver for ISA SBNI12-xx cards that is a low cost alternative to leased line modems. Say Y if you want to insert driver into kernel or say M to compile driver as a module. You can find more information and last versions of drivers and utilities at http://www.granch.ru. If you have any question you can mail to sbni@granch.ru. Say N if unsure. WAN Drivers CONFIG_WAN_DRIVERS Say Y to this option if your Linux box contains a WAN card and you are planning to use the box as a WAN ( = Wide Area Network) router ( = device used to interconnect local area networks over wide area communication links, such as leased lines or public data networks, e.g. X.25 or frame relay) and you will be offered a list of drivers for WAN cards currently available. For more information, read Documentation/networking/wan-router.txt. Note that the answer to this question won't directly affect the kernel: saying N will just cause this configure script to skip all the questions about WAN card drivers. If unsure, say N. Sangoma WANPIPE(tm) multiprotocol cards CONFIG_VENDOR_SANGOMA WANPIPE from Sangoma Technologies Inc. (http://www.sangoma.com ) is a family of intelligent multiprotocol WAN adapters with data transfer rates up to T1 (1.544 Mbps). They are also known as Synchronous Data Link Adapters (SDLA) and designated S502E(A), S503 or S508. These cards support the X.25, Frame Relay, and PPP protocols. If you have one or more of these cards, say Y to this option; you may then also want to read the file Documentation/networking/wanpipe.txt. The next questions will ask you about the protocols you want the driver to support. The driver will be compiled as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called wanpipe.o. For general information about modules read Documentation/modules.txt. Maximum number of cards CONFIG_WANPIPE_CARDS Enter number of WANPIPE adapters installed in your machine. The driver can support up to 8 cards. You may enter more than you actually have if you plan to add more cards in the future without re-compiling the driver, but remember that in this case you'll waste some kernel memory (about 1K per card). WANPIPE X.25 support CONFIG_WANPIPE_X25 Say Y to this option if you are planning to connect a WANPIPE card to an X.25 network. You should then also have said Y to "CCITT X.25 Packet Layer" and "LAPB Data Link Driver", above. If you say N, the X.25 support will not be included in the driver (saves about 16 KB of kernel memory). WANPIPE Frame Relay support CONFIG_WANPIPE_FR Say Y to this option if you are planning to connect a WANPIPE card to a frame relay network. You should then also have said Y to "Frame Relay (DLCI) support", above. If you say N, the frame relay support will not be included in the driver (saves about 16 KB of kernel memory). WANPIPE PPP support CONFIG_WANPIPE_PPP Say Y to this option if you are planning to connect a WANPIPE card to a leased line using Point-to-Point protocol (PPP). You should then also have said Y to "PPP (point-to-point) support", above. If you say N, the PPP support will not be included in the driver (saves about 16 KB of kernel memory). Cyclom 2X(tm) multiprotocol cards (EXPERIMENTAL) CONFIG_CYCLADES_SYNC Cyclom 2X from Cyclades Corporation (http://www.cyclades.com and http://www.cyclades.com.br) is an intelligent multiprotocol WAN adapter with data transfer rates up to 512 Kbps. These cards support the X.25 and SNA related protocols. If you have one or more of these cards, say Y to this option. The next questions will ask you about the protocols you want the driver to support (for now only X.25 is supported). While no documentation is available at this time please grab the wanconfig tarball in http://www.conectiva.com.br/~acme/cycsyn-devel (with minor changes to make it compile with the current wanrouter include files; efforts are being made to use the original package available at ftp://ftp.sangoma.com ). Feel free to contact me or the cycsyn-devel mailing list at acme@conectiva.com.br and cycsyn-devel@bazar.conectiva.com.br for additional details, I hope to have documentation available as soon as possible (Cyclades Brazil is writing the Documentation). The driver will be compiled as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called cyclomx.o. For general information about modules read Documentation/modules.txt. Cyclom 2X X.25 support CONFIG_CYCLOMX_X25 Say Y to this option if you are planning to connect a Cyclom 2X card to an X.25 network. If you say N, the X.25 support will not be included in the driver (saves about 11 KB of kernel memory). Ethernet (10 or 100Mbit) CONFIG_NET_ETHERNET Ethernet (also called IEEE 802.3 or ISO 8802-2) is the most common type of Local Area Network (LAN) in universities and companies. Common varieties of Ethernet are: 10BASE-2 or Thinnet (10 Mbps over coaxial cable, linking computers in a chain), 10BASE-T or twisted pair (10 Mbps over twisted pair cable, linking computers to central hubs), 10BASE-F (10 Mbps over optical fiber links, using hubs), 100BASE-TX (100 Mbps over two twisted pair cables, using hubs), 100BASE-T4 (100 Mbps over 4 standard voice-grade twisted pair cables, using hubs), 100BASE-FX (100 Mbps over optical fiber links) [the 100BASE varieties are also known as Fast Ethernet], and Gigabit Ethernet (1 Gbps over optical fiber or short copper links). If your Linux machine will be connected to an Ethernet and you have an Ethernet network interface card (NIC) installed in your computer, say Y here and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . You will then also have to say Y to the driver for your particular NIC. Note that the answer to this question won't directly affect the kernel: saying N will just cause this configure script to skip all the questions about Ethernet network cards. If unsure, say N. Sun LANCE Ethernet support CONFIG_SUN_LANCE This is support for lance Ethernet cards on Sun workstations such as the SPARCstation IPC (any SPARC with a network interface 'le0' under SunOS basically). This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called lance.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Sun Intel Ethernet support CONFIG_SUN_INTEL This is support for the Intel Ethernet cards on some Sun workstations (all those with a network interface 'ie0' under SunOS). Western Digital/SMC cards CONFIG_NET_VENDOR_SMC If you have a network (Ethernet) card belonging to this class, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . Note that the answer to this question doesn't directly affect the kernel: saying N will just cause this configure script to skip all the questions about Western Digital cards. If you say Y, you will be asked for your specific card in the following questions. WD80*3 support CONFIG_WD80x3 If you have a network (Ethernet) card of this type, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called wd.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. SMC Ultra MCA support CONFIG_ULTRAMCA If you have a network (Ethernet) card of this type and are running an MCA based system (PS/2), say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called smc-mca.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. SMC Ultra support CONFIG_ULTRA If you have a network (Ethernet) card of this type, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . Important: There have been many reports that, with some motherboards mixing an SMC Ultra and an Adaptec AHA154x SCSI card (or compatible, such as some BusLogic models) causes corruption problems with many operating systems. The Linux smc-ultra driver has a work-around for this but keep it in mind if you have such a SCSI card and have problems. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called smc-ultra.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. SMC Ultra32 EISA support CONFIG_ULTRA32 If you have a network (Ethernet) card of this type, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called smc-ultra32.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. SMC 9194 Support CONFIG_SMC9194 This is support for the SMC9xxx based Ethernet cards. Choose this option if you have a DELL laptop with the docking station, or another SMC9192/9194 based chipset. Say Y if you want it compiled into the kernel, and read the file Documentation/networking/smc9.txt and the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called smc9194.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. PCI NE2000 support CONFIG_NE2K_PCI This driver is for NE2000 compatible PCI cards. It will not work with ISA NE2000 cards (they have their own driver, "NE2000/NE1000 support" below). If you have a PCI NE2000 network (Ethernet) card, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called ne2k-pci.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. PCI DM9102 support CONFIG_DM9102 This driver is for DM9102 compatible PCI cards from Davicom (http://www.davicom.com.tw) If you have a PCI DM9102 network (Ethernet) card, say Y. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called dmfe.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. Racal-Interlan (Micom) NI cards CONFIG_NET_VENDOR_RACAL If you have a network (Ethernet) card belonging to this class, such as the NI5010, NI5210 or NI6210, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . Note that the answer to this question doesn't directly affect the kernel: saying N will just cause this configure script to skip all the questions about NI cards. If you say Y, you will be asked for your specific card in the following questions. NI5010 support (EXPERIMENTAL) CONFIG_NI5010 If you have a network (Ethernet) card of this type, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . Note that this is still experimental code. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called ni5010.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. NI5210 support CONFIG_NI52 If you have a network (Ethernet) card of this type, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called ni52.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. NI6510 support CONFIG_NI65 If you have a network (Ethernet) card of this type, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called ni65.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. RealTek 8129/8139 (not 8019/8029!) support CONFIG_RTL8139 This is a driver for the Fast Ethernet PCI network cards based on the RTL8129 and RTL8139 chips. If you have one of those, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. This is recommended. The module will be called rtl8139.o. SiS 900 PCI Fast Ethernet Adapter support CONFIG_SIS900 This is a driver for the Fast Ethernet PCI network cards based on the SiS 900 and SiS 7016 chips. The SiS 900 core is also embedded in SiS 630 and SiS 540 chipsets. If you have one of those, say Y and read the Ethernet-HOWTO, available via FTP (user: anonymous) in ftp://metalab.unc.edu/pub/Linux/docs/HOWTO. Please read Documentation/networking/sis900.txt and comments at the beginning of drivers/net/sis900.c for more information. This driver also supports AMD 79C901 HomePNA such that you can use your phone line as network cable. If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. This is recommended. The module will be called sis900.o. Packet Engines Yellowfin Gigabit-NIC support CONFIG_YELLOWFIN Say Y here if you have a Packet Engines G-NIC PCI Gigabit Ethernet adapter. This adapter is used by the Beowulf Linux cluster project. See http://cesdis.gsfc.nasa.gov/linux/drivers/yellowfin.html for more information about this driver in particular and Beowulf in general. If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. This is recommended. The module will be called yellowfin.o. General Instruments Surfboard 1000 CONFIG_NET_SB1000 This is a driver for the General Instrument (also known as NextLevel) SURFboard 1000 internal cable modem. This is an ISA card which is used by a number of cable TV companies to provide cable modem access. It's a one-way downstream-only cable modem, meaning that your upstream net link is provided by your regular phone modem. At present this driver only compiles as a module, so say M here if you have this card. The module will be called sb1000.o. Then read Documentation/networking/README.sb1000 for information on how to use this module, as it needs special ppp scripts for establishing a connection. Further documentation and the necessary scripts can be found at: http://www.jacksonville.net/~fventuri/ http://home.adelphia.net/~siglercm/sb1000.html http://linuxpower.cx/~cable/ If you don't have this card, of course say N. Alteon AceNIC/3Com 3C985/NetGear GA620 Gigabit support CONFIG_ACENIC Say Y here if you have an Alteon AceNIC, 3Com 3C985(B), NetGear GA620, SGI Gigabit or Farallon PN9000-SX PCI Gigabit Ethernet adapter. The driver allows for using the Jumbo Frame option (9000 bytes/frame) however it requires that your switches can handle this as well. To enable Jumbo Frames, add `mtu 9000' to your ifconfig line. If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. This is recommended. The module will be called acenic.o. Omit support for older Tigon I based AceNICs CONFIG_ACENIC_OMIT_TIGON_I Say Y here if you only have Tigon II based AceNICs and want to leave out support for the older Tigon I based cards which are no longer being sold (ie. the original Alteon AceNIC and 3Com 3C985 (non B version)). This will reduce the size of the driver object by app. 100KB. If you are not sure whether your card is a Tigon I or a Tigon II, say N here. The safe and default value for this is N. SysKonnect SK-98xx support CONFIG_SK98LIN Say Y here if you have a SysKonnect SK-98xx Gigabit Ethernet Server Adapter. The following adapters are supported by this driver: - SK-9841 (single link 1000Base-LX) - SK-9842 (dual link 1000Base-LX) - SK-9843 (single link 1000Base-SX) - SK-9844 (dual link 1000Base-SX) - SK-9821 (single link 1000Base-T) - SK-9822 (dual link 1000Base-T) The dual link adapters support a link-failover feature. Read Documentation/networking/sk98lin.txt for information about optional driver parameters. Questions concerning this driver may be addresse to: linux@syskonnect.de If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. This is recommended. The module will be called sk98lin.o. AMD LANCE and PCnet (AT1500 and NE2100) support CONFIG_LANCE If you have a network (Ethernet) card of this type, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . Some LinkSys cards are of this type. If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. This is recommended. The module will be called lance.o. 3COM cards CONFIG_NET_VENDOR_3COM If you have a network (Ethernet) card belonging to this class, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . Note that the answer to this question doesn't directly affect the kernel: saying N will just cause this configure script to skip all the questions about 3COM cards. If you say Y, you will be asked for your specific card in the following questions. 3c501 support CONFIG_EL1 If you have a network (Ethernet) card of this type, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . Also, consider buying a new card, since the 3c501 is slow, broken, and obsolete: you will have problems. Some people suggest to ping ("man ping") a nearby machine every minute ("man cron") when using this card. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called 3c501.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. 3c503 support CONFIG_EL2 If you have a network (Ethernet) card of this type, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called 3c503.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. 3c505 support CONFIG_ELPLUS Information about this network (Ethernet) card can be found in Documentation/networking/3c505.txt. If you have a card of this type, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. The module will be called 3c505.o. 3c507 support (EXPERIMENTAL) CONFIG_EL16 If you have a network (Ethernet) card of this type, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called 3c507.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. 3c523 support CONFIG_ELMC If you have a network (Ethernet) card of this type, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called 3c523.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. 3c527 support CONFIG_ELMC_II If you have a network (Ethernet) card of this type, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called 3c527.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. 3c509/3c579 support CONFIG_EL3 If you have a network (Ethernet) card belonging to the 3Com EtherLinkIII series, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . If your card is not working you may need to use the DOS setup disk to disable Plug & Play mode, and to select the default media type. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. The module will be called 3c509.o. 3c590 series (592/595/597) "Vortex" support CONFIG_VORTEX If you have a 3Com "Vortex" (Fast EtherLink 3c590/3c592/3c595/3c597) or "Boomerang" series (EtherLink XL 3c900 or 3c905) network (Ethernet) card, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . More specific information is in Documentation/networking/vortex.txt and in the comments at the beginning of drivers/net/3c59x.c. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. Other ISA cards CONFIG_NET_ISA If your network (Ethernet) card hasn't been mentioned yet and its bus system (that's the way the cards talks to the other components of your computer) is ISA (as opposed to EISA, VLB or PCI), say Y. Make sure you know the name of your card. Read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . If unsure, say Y. Note that the answer to this question doesn't directly affect the kernel: saying N will just cause this configure script to skip all the remaining ISA network card questions. If you say Y, you will be asked for your specific card in the following questions. Generic ARCnet support CONFIG_ARCNET If you have a network card of this type, say Y and check out the (arguably) beautiful poetry in Documentation/networking/arcnet.txt. You need both this driver, and the driver for the particular ARCnet chipset of your card. If you don't know, then it's probably a COM90xx type card, so say Y (or M) to "ARCnet COM90xx chipset support" below. You might also want to have a look at the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto (even though ARCnet is not really Ethernet). This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called arcnet.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. Enable arc0e (ARCnet "ether-encap" packet format) CONFIG_ARCNET_ETH This allows you to use "Ethernet encapsulation" with your ARCnet card via the virtual arc0e device. You only need arc0e if you want to talk to nonstandard ARCnet software, specifically, DOS/Windows-style "NDIS" drivers. You do not need to say Y here to communicate with industry-standard RFC1201 implementations, like the arcether.com packet driver or most DOS/Windows ODI drivers. RFC1201 is included automatically as the arc0 device. Please read the ARCnet documentation in Documentation/networking/arcnet.txt for more information about using arc0e and arc0s. Enable arc0s (ARCnet RFC1051 packet format) CONFIG_ARCNET_1051 This allows you to use RFC1051 with your ARCnet card via the virtual arc0s device. You only need arc0s if you want to talk to ARCnet software complying with the "old" standard, specifically, the DOS arcnet.com packet driver, Amigas running AmiTCP, and some variants of NetBSD. You do not need to say Y here to communicate with industry-standard RFC1201 implementations, like the arcether.com packet driver or most DOS/Windows ODI drivers. RFC1201 is included automatically as the arc0 device. Please read the ARCnet documentation in Documentation/networking/arcnet.txt for more information about using arc0e and arc0s. ARCnet COM90xx (normal) chipset driver CONFIG_ARCNET_COM90xx This is the chipset driver for the standard COM90xx cards. If you have always used the old ARCnet driver without knowing what type of card you had, this is probably the one for you. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called com90xx.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. ARCnet COM90xx (IO mapped) chipset driver CONFIG_ARCNET_COM90xxIO This is the chipset driver for the COM90xx cards, using them in IO-mapped mode instead of memory-mapped mode. This is slower than the normal driver. Only use it if your card doesn't support shared memory. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called com90io.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. ARCnet COM90xx (RIM I) chipset driver CONFIG_ARCNET_RIM_I This is yet another chipset driver for the COM90xx cards, but this time only using memory-mapped mode, and no IO ports at all. This driver is completely untested, so if you have one of these cards, please mail David.Woodhouse@mvhi.com, especially if it works! This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called arc-rimi.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. ARCnet COM20020 chipset driver CONFIG_ARCNET_COM20020 This is the driver for the new COM20020 chipset. It supports such things as promiscuous mode, so packet sniffing is possible, and extra diagnostic information. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called com20020.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. Cabletron E21xx support CONFIG_E2100 If you have a network (Ethernet) card of this type, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called e2100.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. CS89x0 support CONFIG_CS89x0 Support for CS89x0 chipset based Ethernet cards. If you have a network (Ethernet) card of this type, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto as well as Documentation/networking/cs89x0.txt. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. The module will be called cs89x.o. DEPCA support CONFIG_DEPCA If you have a network (Ethernet) card of this type, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto as well as drivers/net/depca.c. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. The module will be called depca.o. EtherWorks 3 support CONFIG_EWRK3 This driver supports the DE203, DE204 and DE205 network (Ethernet) cards. If this is for you, say Y and read Documentation/networking/ewrk3.txt in the kernel source as well as the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. The module will be called ewrk3.o. SEEQ8005 support CONFIG_SEEQ8005 This is a driver for the SEEQ 8005 network (Ethernet) card. If this is for you, read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. The module will be called ewrk3.o. AT1700/1720 support CONFIG_AT1700 If you have a network (Ethernet) card of this type, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. The module will be called at1700.o. FMV-181/182/183/184 support CONFIG_FMV18X If you have a Fujitsu FMV-181/182/183/184 network (Ethernet) card, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . If you use an FMV-183 or FMV-184 and it is not working, you may need to disable Plug & Play mode of the card. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called fmv18x.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. EtherExpress PRO support CONFIG_EEXPRESS_PRO If you have a network (Ethernet) card of this type, say Y. Note however that the EtherExpress PRO/100 Ethernet card has its own separate driver. Please read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called eepro.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. EtherExpress support CONFIG_EEXPRESS If you have an EtherExpress16 network (Ethernet) card, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . Note that the Intel EtherExpress16 card used to be regarded as a very poor choice because the driver was very unreliable. We now have a new driver that should do better. If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. The module will be called eexpress.o. HP PCLAN+ (27247B and 27252A) support CONFIG_HPLAN_PLUS If you have a network (Ethernet) card of this type, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called hp-plus.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. HP PCLAN (27245 and other 27xxx series) support CONFIG_HPLAN If you have a network (Ethernet) card of this type, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called hp.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. HP 10/100VG PCLAN (ISA, EISA, PCI) support CONFIG_HP100 If you have a network (Ethernet) card of this type, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. The module will be called hp100.o. NE2000/NE1000 support CONFIG_NE2000 If you have a network (Ethernet) card of this type, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . Many Ethernet cards without a specific driver are compatible with NE2000. If you have a PCI NE2000 card however, say N here and Y to "PCI NE2000 support", above. If you have a NE2000 card and are running on an MCA system (a bus system used on some IBM PS/2 computers and laptops), say N here and Y to "NE/2 (ne2000 MCA version) support", below. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called ne.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. SK_G16 support CONFIG_SK_G16 If you have a network (Ethernet) card of this type, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . NE/2 (ne2000 MCA version) support CONFIG_NE2_MCA If you have a network (Ethernet) card of this type, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called ne2.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. SKnet MCA support CONFIG_SKMC These are Micro Channel ethernet adapters. You need to say Y to "MCA support" in order to use this driver. Supported cards are the SKnet Junior MC2 and the SKnet MC2(+). The driver automatically distinguishes between the two cards. Note that using multiple boards of different type hasn't been tested with this driver. Say Y if you have one of these ethernet adapters. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module is called sk_mca.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. EISA, VLB, PCI and on board controllers CONFIG_NET_EISA This is another class of network cards which attach directly to the bus. If you have one of those, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . Note that the answer to this question doesn't directly affect the kernel: saying N will just cause this configure script to skip all the questions about this class of network cards. If you say Y, you will be asked for your specific card in the following questions. If you are unsure, say Y. AMD PCnet32 (VLB and PCI) support CONFIG_PCNET32 If you have a PCnet32 or PCnetPCI based network (Ethernet) card, answer Y here and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called pcnet32.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. Ansel Communications EISA 3200 support CONFIG_AC3200 If you have a network (Ethernet) card of this type, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called ac3200.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. Mylex EISA LNE390A/LNE390B support (EXPERIMENTAL) CONFIG_LNE390 If you have a network (Ethernet) card of this type, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called lne390.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. Novell/Eagle/Microdyne NE3210 EISA support (EXPERIMENTAL) CONFIG_NE3210 If you have a network (Ethernet) card of this type, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . Note that this driver will NOT WORK for NE3200 cards as they are completely different. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called ne3210.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. Apricot Xen-II on board Ethernet CONFIG_APRICOT If you have a network (Ethernet) controller of this type, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. The module will be called apricot.o. Generic DECchip & DIGITAL EtherWORKS PCI/EISA CONFIG_DE4X5 This is support for the DIGITAL series of PCI/EISA Ethernet cards. These include the DE425, DE434, DE435, DE450 and DE500 models. If you have a network card of this type, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . More specific information is contained in Documentation/networking/de4x5.txt. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called de4x5.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. DECchip Tulip (dc21x4x) PCI support CONFIG_DEC_ELCP This driver is developed for the SMC EtherPower series Ethernet cards and also works with cards based on the DECchip 21040/21041/21140 (Tulip series) chips. Some LinkSys PCI cards are of this type. (If your card is NOT SMC EtherPower 10/100 PCI (smc9332dst), you can also try the driver for "Generic DECchip" cards, above. However, most people with a network card of this type will say Y here.) Do read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . More specific information is contained in Documentation/networking/tulip.txt. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called tulip.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. Digi Intl. RightSwitch support CONFIG_DGRS This is support for the Digi International RightSwitch series of PCI/EISA Ethernet switch cards. These include the SE-4 and the SE-6 models. If you have a network card of this type, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . More specific information is contained in Documentation/networking/dgrs.txt. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called dgrs.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. EtherExpress PRO/100 support CONFIG_EEXPRESS_PRO100 If you have an Intel EtherExpress PRO/100 PCI network (Ethernet) card, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called eepro100.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. ICL EtherTeam 16i/32 support (EXPERIMENTAL) CONFIG_ETH16I If you have a network (Ethernet) card of this type, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called eth16i.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. TI ThunderLAN support (EXPERIMENTAL) CONFIG_TLAN If you have a PCI Ethernet network card based on the ThunderLAN chip which is supported by this driver, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . Devices currently supported by this driver are Compaq Netelligent, Compaq NetFlex and Olicom cards. Please read the file Documentation/networking/tlan.txt for more details. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called tlan.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. Please email feedback to torben.mathiasen@compaq.com. VIA Rhine support CONFIG_VIA_RHINE If you have a VIA "rhine" based network card (Rhine-I (3043) or Rhine-2 (VT86c100A)), say Y here. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called via-rhine.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. Racal-Interlan EISA ES3210 support (EXPERIMENTAL) CONFIG_ES3210 If you have a network (Ethernet) card of this type, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called es3210.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. SMC EtherPower II (EXPERIMENTAL) CONFIG_EPIC100 If you have an SMC EtherPower II 9432 PCI Ethernet network card which is based on the SMC83c170, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called epic100.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. SGI Seeq ethernet controller support CONFIG_SGISEEQ Say Y here if you have an Seeq based Ethernet network card. This is used in many Silicon Graphics machines. Zenith Z-Note support (EXPERIMENTAL) CONFIG_ZNET The Zenith Z-Note notebook computer has a built-in network (Ethernet) card, and this is the Linux driver for it. Note that the IBM Thinkpad 300 is compatible with the Z-Note and is also supported by this driver. Read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . Adaptec Starfire support CONFIG_ADAPTEC_STARFIRE If you have an Ethernet network card like this, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called starfire.o. If you want to compile it as a module, say M here and read Documentation/modules.txt as well as Documentation/networking/net-modules.txt. Pocket and portable adapters CONFIG_NET_POCKET Cute little network (Ethernet) devices which attach to the parallel port ("pocket adapters"), commonly used with laptops. If you have one of those, say Y and read the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . If you want to plug a network (or some other) card into the PCMCIA (or PC-card) slot of your laptop instead (PCMCIA is the standard for credit card size extension cards used by all modern laptops), you need the pcmcia-cs package (location contained in the file Documentation/Changes) and you can say N here. Laptop users should read the Linux Laptop home page at http://www.cs.utexas.edu/users/kharker/linux-laptop/ . Note that the answer to this question doesn't directly affect the kernel: saying N will just cause this configure script to skip all the questions about this class of network devices. If you say Y, you will be asked for your specific device in the following questions. AT-LAN-TEC/RealTek pocket adapter support CONFIG_ATP This is a network (Ethernet) device which attaches to your parallel port. Read drivers/net/atp.c as well as the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto , if you want to use this. If you intend to use this driver, you should have said N to the Parallel Printer support, because the two drivers don't like each other. D-Link DE600 pocket adapter support CONFIG_DE600 This is a network (Ethernet) device which attaches to your parallel port. Read Documentation/networking/DLINK.txt as well as the Ethernet-HOWTO, available from http://www.linuxdoc.org/docs.html#howto , if you want to use this. It is possible to have several devices share a single parallel port and it is safe to compile the corresponding drivers into the kernel. If you want to compile this driver as a module however ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called de600.o. D-Link DE620 pocket adapter support CONFIG_DE620 This is a network (Ethernet) device which attaches to your parallel port. Read Documentation/networking/DLINK.txt as well as the Ethernet-HOWTO, available from http://metalab.unc.edu/mdw/linux.html#howto , if you want to use this. It is possible to have several devices share a single parallel port and it is safe to compile the corresponding drivers into the kernel. If you want to compile this driver as a module however ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called de620.o. Token Ring driver support CONFIG_TR Token Ring is IBM's way of communication on a local network; the rest of the world uses Ethernet. To participate on a Token Ring network, you need a special Token ring network card. If you are connected to such a Token Ring network and want to use your Token Ring card under Linux, say Y here and to the driver for your particular card below and read the Token-Ring mini-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . Most people can say N here. IBM Tropic chipset based adapter support CONFIG_IBMTR This is support for all IBM Token Ring cards that don't use DMA. If you have such a beast, say Y and read the Token-Ring mini-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . Warning: this driver will almost definitely fail if more than one active Token Ring card is present. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called ibmtr.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. IBM Olympic chipset PCI adapter support CONFIG_IBMOL This is support for all non-Lanstreamer IBM PCI Token Ring Cards. Specifically this is all IBM PCI, PCI Wake On Lan, PCI II, PCI II Wake On Lan, and PCI 100/16/4 adapters. If you have such an adapter, say Y and read the Token-Ring mini-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will will be called olympic.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Also read the file Documentation/networking/olympic.txt or check the Linux Token Ring Project site for the latest information at http://www.linuxtr.net Generic TMS380 Token Ring ISA/PCI adapter support CONFIG_TMS380TR This driver provides generic support for token ring adapters based on the Texas Instruments TMS380 series chipsets. This includes the SysKonnect TR4/16(+) ISA (SK-4190), SysKonnect TR4/16(+) PCI (SK-4590), SysKonnect TR4/16 PCI (SK-4591), Compaq 4/16 PCI, Thomas-Conrad TC4048 4/16 PCI, and Intel TokenExpress 4/16 and PRO ISA adapters. If you have such an adapter and would like to use it, say Y or M and read the Token-Ring mini-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . Also read the file linux/Documentation/networking/tms380tr.txt or check http://www.auk.cx/tms380tr/ SMC ISA TokenRing adapter support CONFIG_SMCTR This is support for the ISA SMC Token Ring cards, specifically SMC TokenCard Elite (8115T) and SMC TokenCard Elite/A (8115T/A) adapters. If you have such an adapter and would like to use it, say Y or M and read the Token-Ring mini-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . Traffic Shaper (EXPERIMENTAL) CONFIG_SHAPER The traffic shaper is a virtual network device that allows you to limit the rate of outgoing data flow over some other network device. The traffic that you want to slow down can then be routed through these virtual devices. See Documentation/networking/shaper.txt for more information. An alternative to this traffic shaper is the experimental Class-Based Queueing (CBQ) scheduling support which you get if you say Y to "QoS and/or fair queueing" above. To set up and configure shaper devices, you need the shapecfg program, available from ftp://shadow.cabi.net/pub/Linux in the shaper package. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called shaper.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. If unsure, say N. FDDI driver support CONFIG_FDDI Fiber Distributed Data Interface is a high speed local area network design; essentially a replacement for high speed Ethernet. FDDI can run over copper or fiber. If you are connected to such a network and want a driver for the FDDI card in your computer, say Y here (and then also Y to the driver for your FDDI card, below). Most people will say N. Digital DEFEA and DEFPA adapter support CONFIG_DEFXX This is support for the DIGITAL series of EISA (DEFEA) and PCI (DEFPA) controllers which can connect you to a local FDDI network. HIgh Performance Parallel Interface support (EXPERIMENTAL) CONFIG_HIPPI HIgh Performance Parallel Interface (HIPPI) is a 800Mbit/sec and 1600Mbit/sec dual-simplex switched or point-to-point network. HIPPI can run over copper (25m) or fiber (300m on multi-mode or 10km on single-mode). HIPPI networks are commonly used for clusters and to connect to super computers. If you are connected to a HIPPI network and have a HIPPI network card in your computer that you want to use under Linux, say Y here (you must also remember to enable the driver for your HIPPI card below). Most people will say N here. Essential RoadRunner HIPPI PCI adapter support CONFIG_ROADRUNNER Say Y here if this is your PCI HIPPI network card. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called rrunner.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. If unsure, say N. Use large TX/RX rings CONFIG_ROADRUNNER_LARGE_RINGS If you say Y here, the RoadRunner driver will preallocate up to 2 MB of additional memory to allow for fastest operation, both for transmitting and receiving. This memory cannot be used by any other kernel code or by user space programs. Say Y here only if you have the memory. Acorn Ether1 card CONFIG_ARM_ETHER1 If you have an Acorn system with one of these (AKA25) network cards, you should say Y to this option if you wish to use it with Linux. Acorn/ANT Ether3 card CONFIG_ARM_ETHER3 If you have an Acorn system with one of these network cards, you should say Y to this option if you wish to use it with Linux. I Cubed EtherH card CONFIG_ARM_ETHERH If you have an Acorn system with one of these network cards, you should say Y to this option if you wish to use it with Linux. EBSA-110 Ethernet interface CONFIG_ARM_AM79C961A If you wish to compile a kernel for the EBSA-110, then you should always answer Y to this. Support CDROM drives that are not SCSI or IDE/ATAPI CONFIG_CD_NO_IDESCSI If you have a CDROM drive that is neither SCSI nor IDE/ATAPI, say Y here, otherwise N. Read the CDROM-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . Note that the answer to this question doesn't directly affect the kernel: saying N will just cause this configure script to skip all the questions about these CDROM drives. If you are unsure what you have, say Y and find out whether you have one of the following drives. For each of these drivers, a file Documentation/cdrom/ exists. Especially in cases where you do not know exactly which kind of drive you have you should read there. Most of these drivers use a file drivers/cdrom/.h where you can define your interface parameters and switch some internal goodies. All these CDROM drivers are also usable as a module ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile them as module, say M instead of Y and read Documentation/modules.txt. If you want to use any of these CDROM drivers, you also have to answer Y or M to "ISO 9660 CDROM filesystem support" below (this answer will get "defaulted" for you if you enable any of the Linux CDROM drivers). Sony CDU31A/CDU33A CDROM support CONFIG_CDU31A These CDROM drives have a spring-pop-out caddyless drawer, and a rectangular green LED centered beneath it. NOTE: these CDROM drives will not be auto detected by the kernel at boot time; you have to provide the interface address as an option to the kernel at boot time as described in Documentation/cdrom/cdu31a or fill in your parameters into drivers/cdrom/cdu31a.c. Try "man bootparam" or see the documentation of your boot loader (lilo or loadlin) about how to pass options to the kernel. The lilo procedure is also explained in the SCSI-HOWTO. If you say Y here, you should also say Y or M to "ISO 9660 CDROM filesystem support" below, because that's the filesystem used on CDROMs. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called cdu31a.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Standard Mitsumi [no XA/Multisession] CDROM support CONFIG_MCD This is the older of the two drivers for the older Mitsumi models LU-005, FX-001 and FX-001D. This is not the right driver for the FX-001DE and the triple or quad speed models (all these are IDE/ATAPI models). Please also the file Documentation/cdrom/mcd. With the old LU-005 model, the whole drive chassis slides out for cd insertion. The FX-xxx models use a motorized tray type mechanism. Note that this driver does not support XA or MultiSession CDs (PhotoCDs). There is a new driver (next question) which can do this. If you want that one, say N here. If you say Y here, you should also say Y or M to "ISO 9660 CDROM filesystem support" below, because that's the filesystem used on CDROMs. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called mcd.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. IRQ channel for Mitsumi CD-ROM CONFIG_MCD_IRQ This allows you to specify the default value of the IRQ used by the driver. This setting can be overridden by passing the "mcd=" parameter to the kernel at boot time (or at module load time if you said M to "Standard Mitsumi CDROM support"). I/O base address for Mitsumi CD-ROM CONFIG_MCD_BASE This allows you to specify the default value of the I/O base address used by the driver. This setting can be overridden by passing the "mcd=" parameter to the kernel at boot time (or at module load time if you said M to "Standard Mitsumi CDROM support"). Mitsumi [XA/MultiSession] support CONFIG_MCDX Use this driver if you want to be able to read XA or MultiSession CDs (PhotoCDs) as well as ordinary CDs with your Mitsumi LU-005, FX-001 or FX-001D CDROM drive. In addition, this driver uses much less kernel memory than the old one, if that is a concern. This driver is able to support more than one drive, but each drive needs a separate interface card. Please read the file Documentation/cdrom/mcdx. If you say Y here, you should also say Y or M to "ISO 9660 CDROM filesystem support" below, because that's the filesystem used on CDROMs. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called mcdx.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Matsushita/Panasonic/Creative, Longshine, TEAC CDROM support CONFIG_SBPCD This driver supports most of the drives which use the Panasonic or Sound Blaster interface. Please read the file Documentation/cdrom/sbpcd. The Matsushita CR-521, CR-522, CR-523, CR-562, CR-563 drives (sometimes labeled "Creative"), the Creative Labs CD200, the Longshine LCS-7260, the "IBM External ISA CDROM" (in fact a CR-56x model), the TEAC CD-55A fall under this category. Some other "electrically compatible" drives (Vertos, Genoa, some Funai models) are currently not supported; for the Sanyo H94A drive currently a separate driver (asked later) is responsible. Most drives have a uniquely shaped faceplate, with a caddyless motorized drawer, but without external brand markings. The older CR-52x drives have a caddy and manual loading/eject, but still no external markings. The driver is able to do an extended auto-probing for interface addresses and drive types; this can help to find facts in cases you are not sure, but can consume some time during the boot process if none of the supported drives gets found. Once your drive got found, you should enter the reported parameters into drivers/cdrom/sbpcd.h and set "DISTRIBUTION 0" there. This driver can support up to four CDROM controller cards, and each card can support up to four CDROM drives; if you say Y here, you will be asked how many controller cards you have. If compiled as a module, only one controller card (but with up to four drives) is usable. If you say Y here, you should also say Y or M to "ISO 9660 CDROM filesystem support" below, because that's the filesystem used on CDROMs. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called sbpcd.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Matsushita/Panasonic, ... second CDROM controller support CONFIG_SBPCD2 Say Y here only if you have two CDROM controller cards of this type (usually only if you have more than four drives). You should enter the parameters for the second, third and fourth interface card into linux/include/linux/sbpcd.h before compiling the new kernel. Read the file Documentation/cdrom/sbpcd. Aztech/Orchid/Okano/Wearnes/TXC/CyDROM CDROM support CONFIG_AZTCD This is your driver if you have an Aztech CDA268-01A, Orchid CD-3110, Okano or Wearnes CDD110, Conrad TXC, or CyCDROM CR520 or CR540 CDROM drive. This driver -- just like all these CDROM drivers -- is NOT for CDROM drives with IDE/ATAPI interfaces, such as Aztech CDA269-031SE. Please read the file Documentation/cdrom/aztcd. If you say Y here, you should also say Y or M to "ISO 9660 CDROM filesystem support" below, because that's the filesystem used on CDROMs. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called aztcd.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Sony CDU535 CDROM support CONFIG_CDU535 This is the driver for the older Sony CDU-535 and CDU-531 CDROM drives. Please read the file Documentation/cdrom/sonycd535. If you say Y here, you should also say Y or M to "ISO 9660 CDROM filesystem support" below, because that's the filesystem used on CDROMs. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called sonycd535.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Goldstar R420 CDROM support CONFIG_GSCD If this is your CDROM drive, say Y here. As described in the file linux/Documentation/cdrom/gscd, you might have to change a setting in the file linux/drivers/cdrom/gscd.h before compiling the kernel. Please read the file Documentation/cdrom/gscd. If you say Y here, you should also say Y or M to "ISO 9660 CDROM filesystem support" below, because that's the filesystem used on CDROMs. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called gscd.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Philips/LMS CM206 CDROM support CONFIG_CM206 If you have a Philips/LMS CDROM drive cm206 in combination with a cm260 host adapter card, say Y here. Please also read the file Documentation/cdrom/cm206. If you say Y here, you should also say Y or M to "ISO 9660 CDROM filesystem support" below, because that's the filesystem used on CDROMs. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called cm206.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Optics Storage DOLPHIN 8000AT CDROM support CONFIG_OPTCD This is the driver for the 'DOLPHIN' drive with a 34-pin Sony compatible interface. It also works with the Lasermate CR328A. If you have one of those, say Y. This driver does not work for the Optics Storage 8001 drive; use the IDE-ATAPI CDROM driver for that one. Please read the file Documentation/cdrom/optcd. If you say Y here, you should also say Y or M to "ISO 9660 CDROM filesystem support" below, because that's the filesystem used on CDROMs. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called optcd.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Sanyo CDR-H94A CDROM support CONFIG_SJCD If this is your CDROM drive, say Y here and read the file Documentation/cdrom/sjcd. You should then also say Y or M to "ISO 9660 CDROM filesystem support" below, because that's the filesystem used on CDROMs. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called sjcd.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Soft configurable cdrom interface card support CONFIG_CDI_INIT If you want to include boot-time initialization of any cdrom interface card that is software configurable, say Y here. Currently only the ISP16/MAD16/Mozart sound cards with built-in cdrom interfaces are supported. Note that the answer to this question doesn't directly affect the kernel: saying N will just cause this configure script to skip all the questions about these CDROM drives. ISP16/MAD16/Mozart soft configurable cdrom interface support CONFIG_ISP16_CDI These are sound cards with built-in cdrom interfaces using the OPTi 82C928 or 82C929 chips. Say Y here to have them detected and possibly configured at boot time. In addition, You'll have to say Y to a driver for the particular cdrom drive you have attached to the card. Read Documentation/cdrom/isp16 for details. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called isp16.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Quota support CONFIG_QUOTA If you say Y here, you will be able to set per user limits for disk usage (also called disk quotas). Currently, it works only for the ext2 filesystem. You need additional software in order to use quota support; for details, read the Quota mini-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . Probably the quota support is only useful for multi user systems. If unsure, say N. Support for USB CONFIG_USB Universal Serial Bus (USB) is a specification for a serial bus subsystem which offers higher speeds and more features than the traditional PC serial port. The bus supplies power to peripherals and allows for hot swapping. Up to 127 USB peripherals can be connected to a single USB port in a tree structure. The USB port is the root of the tree, the peripherals are the leaves, and the inner nodes are special USB devices called hubs. Many newer PCs have USB ports and newer peripherals such as scanners, keyboards, mice, modems, and printers support the USB protocol and can be connected to the PC via those ports. Say Y here if your computer has a USB port and you want to use USB devices. You then need to say Y to at least one of "UHCI support" or "OHCI support" below (the type of interface that the USB hardware in your computer provides) and then choose from among the drivers for USB peripherals. This code is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called usbcore.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. UHCI (intel PIIX4, VIA, ...) support? CONFIG_USB_UHCI The Universal Host Controller Interface is a standard by Intel for accessing the USB hardware in the PC (which is also called the USB host controller). If your USB host controller conforms to this standard, say Y. All recent boards with Intel PCI chipsets (like intel 430TX, 440FX, 440LX, 440BX, i810, i820) conform to this standard. Also all VIA PCI chipsets (like VIA VP2, VP3, MVP3, Apollo Pro, Apollo Pro II or Apollo Pro 133). If unsure, say Y. This code is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called usb-uhci.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. OHCI-HCD (Compaq, iMacs, OPTi, SiS, ALi, ...) support? CONFIG_USB_OHCI_HCD The Open Host Controller Interface is a standard by Compaq/Microsoft/National for accessing the USB PC hardware (also called USB host controller). If your USB host controller conforms to this standard, say Y. The USB host controllers on most non-Intel architectures and on several x86 compatibles with non-Intel chipsets - like SiS (actual 610, 610 and so on) or ALi (ALi IV, ALi V, Aladdin Pro..) - conform to this standard. You may want to read the file Documentation/usb/ohci-hcd.txt. This code is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called usb-ohci-hcd.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. USB Human Interface Device (HID) support CONFIG_USB_HID Say Y here if you want to connect a keyboard, mouse, joystick, graphic tablet, UPS or any other HID based devices to your computer via USB. USB HIDBP Keyboard support CONFIG_USB_KBD Say Y here if you don't want to use the generic HID driver for your USB keyboard and prefer to use the keyboard in its limited Boot Protocol mode. This driver is much smaller than the HID one. USB HIDBP Mouse support CONFIG_USB_MOUSE Say Y here if you don't want to use the generic HID driver for your USB mouse and prefer to use the mouse in its limited Boot Protocol mode. This driver is much smaller than the HID one. Wacom Graphire tablet support CONFIG_USB_GRAPHIRE Say Y here if you want to use the USB version of the Wacom Graphire tablet. Make sure you select Mouse and Event support, don't select HID support, because this driver collides with it. Use HIDBP support for keyboards and mice instead if you need it. Logitech WingMan Force joystick support CONFIG_USB_WMFORCE Say Y here if you want to use the Logitech WingMan Force with Linux on the USB port. No force-feedback support yet, but other than that, it should work like a normal joystick. Keyboard support CONFIG_INPUT_KEYBDEV Say Y here if you want your USB HID keyboard to be able to serve as a system keyboard. Mouse support CONFIG_INPUT_MOUSEDEV Say Y here if you want your USB HID mouse to be accessible as misc devices 32+ under /dev/, as an emulated PS/2 mouse. Mix all mice into one device CONFIG_INPUT_MOUSEDEV_MIX Say Y here if you want input from all your USB HID mice to be mixed into one misc device. If you say N, you'll have a separate device for each your USB mouse. Joystick support CONFIG_INPUT_JOYDEV Say Y here if you want your USB HID joystick or gamepad to be accessible as /dev/js device. You can't use a normal joystick if you select this. Event interface support CONFIG_INPUT_EVDEV Say Y here if you want your USB HID device events be accessible under /dev/inputX (misc 64+) in a generic way. This is the future ... USB Scanner support CONFIG_USB_SCANNER Say Y here if you want to connect a USB scanner to your computer's USB port. Please read Documentation/usb/scanner.txt and Documentation/usb/scanner-hp-sane.txt for more information. This code is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called hp_scanner.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. USB Audio support CONFIG_USB_AUDIO Say Y here if you want to connect USB audio equipment such as speakers to your computer's USB port. This code is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called audio.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. USB Modem (CDC ACM) support CONFIG_USB_ACM This driver supports USB modems and ISDN adapters which support the Communication Device Class Abstract Control Model interface. This code is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called acm.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. USB Serial converter support CONFIG_USB_SERIAL Say Y here if you want to connect a Connect Tech WhiteHEAT multi-port USB to serial converter; a Belkin, Peracom, or eTek single port USB to serial converter; or a Handspring Visor. Please read Documentation/usb/usb-serial.txt for more information. This code is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called usb-serial.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. USB Generic Serial Driver CONFIG_USB_SERIAL_GENERIC Say Y here if you want to use the generic USB serial driver. Please read Documentation/usb/usb-serial.txt for more information on using this driver. It is recommended that the USB Serial Driver be compiled as a module for this driver to be used properly. USB ConnectTech WhiteHEAT Serial Driver CONFIG_USB_SERIAL_WHITEHEAT Say Y here if you want to use a ConnectTech WhiteHEAT 4 port USB to serial converter device. USB Handspring Visor Driver CONFIG_USB_SERIAL_VISOR Say Y here if you want to connect to your HandSpring Visor through its USB docking station. USB Belkin Single Port Serial Driver CONFIG_USB_SERIAL_BELKIN Say Y here if you want to use a Belkin single port USB to serial converter device. USB Peracom Single Port Serial Driver CONFIG_USB_SERIAL_PERACOM Say Y here if you want to use a Peracom single port USB to serial converter device. USB Printer support CONFIG_USB_PRINTER Say Y here if you want to connect a USB printer to your computer's USB port. This code is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called printer.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. USB CPiA Camera support CONFIG_USB_CPIA Say Y here if you want to connect this type of camera to your computer's USB port. This code is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called cpia.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. USB OV511 Camera support CONFIG_USB_OV511 Say Y here if you want to connect this type of camera to your computer's USB port. See Documentation/usb/ov511.txt for more information and for a list of supported cameras. This code is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called ov511.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. USB Kodak DC-2xx Camera support CONFIG_USB_DC2XX Say Y here if you want to connect this type of still camera to your computer's USB port. See Documentation/usb/dc2xx.txt for more information; some non-Kodak cameras may also work with this driver, given application support (such as www.gPhoto.org). This code is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called dc2xx.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. USB SCSI (mass storage) support CONFIG_USB_SCSI Say Y here if you want to connect USB mass storage devices to your computer's USB port. This code is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called usb-scsi.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. USB SCSI verbose debug CONFIG_USB_SCSI_DEBUG Say Y here in order to have the USB SCSI code generate verbose debugging messages. USS720 parport driver CONFIG_USB_USS720 This driver is for USB parallel port adapters that use the Lucent Technologies USS-720 chip. These adapters provide USB compatibility to peripherals designed with parallel port interfaces. The chip has two modes: automatic mode and manual mode. In automatic mode, it looks to the computer like a standard USB printer. Only printers may be connected to the USS-720 in this mode. The generic USB printer driver ("USB Printer support", above) may be used in that mode, and you can say N here if you want to use the chip only in this mode. Manual mode is not limited to printers, any parallel port device should work. This driver utilizes manual mode. Note however that some operations are three orders of magnitude slower than on a PCI/ISA Parallel Port, so timing critical applications might not work. Say Y here if you own an USS-720 USB->Parport cable and intend to connect anything other than a printer to it. This code is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called uss720.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. USB device filesystem CONFIG_USB_DEVICEFS This file system implements a "devices" file, that lists the currently connected to your USB busses, a "drivers" file that lists the USB kernel client drivers currently loaded, and for every connected device a file named "xxx/yyy", where xxx is the bus number and yyy the device number, that can be used by userspace drivers to talk to the device. Most users want to say Y here. DABUSB driver CONFIG_USB_DABUSB A Digital Audio Broadcasting (DAB) Receiver for USB and Linux brought to you by the DAB-Team (http://dab.in.tum.de). This driver can be taken as an example for URB-based bulk, control, and isochronous transactions. This code is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called dabusb.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. ACPI support CONFIG_ACPI Advanced Configuration and Power Interface (ACPI) is an interface specification to support power management of peripherals. If your system supports it, say Y here. Minix fs support CONFIG_MINIX_FS Minix is a simple operating system used in many classes about OS's. The minix filesystem (method to organize files on a hard disk partition or a floppy disk) was the original filesystem for Linux, but has been superseded by the second extended filesystem ext2fs. You don't want to use the minix filesystem on your hard disk because of certain built-in restrictions, but it is sometimes found on older Linux floppy disks. This option will enlarge your kernel by about 28 kB. If unsure, say N. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called minix.o. Note that the filesystem of your root partition (the one containing the directory /) cannot be compiled as a module. Second extended fs support CONFIG_EXT2_FS This is the de facto standard Linux filesystem (method to organize files on a storage device) for hard disks. You want to say Y here, unless you intend to use Linux exclusively from inside a DOS partition using the umsdos filesystem. The advantage of the latter is that you can get away without repartitioning your hard drive (which often implies backing everything up and restoring afterwards); the disadvantage is that Linux becomes susceptible to DOS viruses and that umsdos is somewhat slower than ext2fs. Even if you want to run Linux in this fashion, it might be a good idea to have ext2fs around: it enables you to read more floppy disks and facilitates the transition to a *real* Linux partition later. Another (rare) case which doesn't require ext2fs is a diskless Linux box which mounts all files over the network using NFS (in this case it's sufficient to say Y to "NFS filesystem support" below). Saying Y here will enlarge your kernel by about 44 kB. The Ext2fs-Undeletion mini-HOWTO, available from http://www.linuxdoc.org/docs.html#howto , gives information about how to retrieve deleted files on ext2fs filesystems. To change the behavior of ext2 filesystems, you can use the tune2fs utility ("man tune2fs"). To modify attributes of files and directories on ext2 filesystems, use chattr ("man chattr"). Ext2fs partitions can be read from within DOS using the ext2tool command line tool package (available via FTP (user: anonymous) from ftp://metalab.unc.edu/pub/Linux/system/filesystems/ext2 ) and from within Windows NT using the ext2nt command line tool package from ftp://metalab.unc.edu/pub/Linux/utils/dos . Explore2fs is a graphical explorer for ext2fs partitions which runs on Windows 95 and Windows NT and includes experimental write support; it is available from http://jnewbigin-pc.it.swin.edu.au/Linux/Explore2fs.htm . If you want to compile this filesystem as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called ext2.o. Be aware however that the filesystem of your root partition (the one containing the directory /) cannot be compiled as a module, and so this could be dangerous. Most everyone wants to say Y here. SCO UnixWare BFS Support CONFIG_BFS_FS Boot Filesystem (BFS) is a filesystem used under SCO UnixWare to allow bootloader access the kernel image and other important files during the boot process. It is usually mounted under /stand and corresponds to the slice marked as "STAND" in the UnixWare partition. This is useful if you want to access files on your /stand slice from Linux. More information on this filesystem can be found in Documentation/filesystems/bfs.txt file. If you do not know what it is, say N. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called bfs.o. Note that the filesystem of your root partition (the one containing the directory /) cannot be compiled as a module. ISO 9660 CDROM filesystem support CONFIG_ISO9660_FS This is the standard filesystem used on CDROMs. It was previously known as "High Sierra Filesystem" and is called "hsfs" on other Unix systems. The so-called Rock-Ridge extensions which allow for long Unix filenames and symbolic links are also supported by this driver. If you have a CDROM drive and want to do more with it than just listen to audio CDs and watch its LEDs, say Y (and read Documentation/filesystems/isofs.txt and the CDROM-HOWTO, available from http://www.linuxdoc.org/docs.html#howto ), thereby enlarging your kernel by about 27 KB; otherwise say N. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called isofs.o. Microsoft Joliet CDROM extensions CONFIG_JOLIET Joliet is a Microsoft extension for the ISO 9660 CDROM filesystem which allows for long filenames in unicode format (unicode is the new 16 bit character code, successor to ASCII, which encodes the characters of almost all languages of the world; see http://www.unicode.org for more information). Say Y here if you want to be able to read Joliet CDROMs under Linux. UDF Filesystem support (read only) CONFIG_UDF_FS This is the new filesystem used by some CDROMS and DVD drivers. Say Y if you intend to mount DVD discs or CDRW's written in packet mode, or if written to by other UDF utilities, such as DirectCD. Please read Documentation/filesystems/udf.txt. This filesystem support is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module is called udf.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. If unsure, say N. UDF write support (DANGEROUS) CONFIG_UDF_RW Say Y if you want to test write support for UDF filesystems. Due to lack of support for writing to CDR/CDRW's, this option is only supported for Hard Discs, DVD-RAM, and loopback files. DOS FAT fs support CONFIG_FAT_FS If you want to use one of the FAT-based filesystems (the MS-DOS, VFAT (Windows 95) and UMSDOS (used to run Linux on top of an ordinary DOS partition) filesystems), then you must say Y or M here to include FAT support. You will then be able to mount partitions or diskettes with FAT-based filesystems and transparently access the files on them, i.e. MSDOS files will look and behave just like all other Unix files. This FAT support is not a filesystem in itself, it only provides the foundation for the other filesystems. You will have to say Y or M to at least one of "msdos fs support" or "vfat fs support" in order to make use of it. Another way to read and write MSDOS floppies and hard drive partitions from within Linux (but not transparently) is with the mtools ("man mtools") program suite. This doesn't require the FAT filesystem support. It is now also becoming possible to read and write compressed FAT filesystems; read Documentation/filesystems/fat_cvf.txt for details. The FAT support will enlarge your kernel by about 37 KB. If unsure, say Y. If you want to compile this as a module however ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called fat.o. Note that if you compile the FAT support as a module, you cannot compile any of the FAT-based filesystems into the kernel -- they will have to be modules as well. The filesystem of your root partition (the one containing the directory /) cannot be a module, so don't say M here if you intend to use UMSDOS as your root filesystem. MSDOS fs support CONFIG_MSDOS_FS This allows you to mount MSDOS partitions of your hard drive (unless they are compressed; to access compressed MSDOS partitions under Linux, you can either use the DOS emulator DOSEMU, described in the DOSEMU-HOWTO, available from http://www.linuxdoc.org/docs.html#howto , or try dmsdosfs in ftp://metalab.unc.edu/pub/Linux/system/filesystems/dosfs . If you intend to use dosemu with a non-compressed MSDOS partition, say Y here) and MSDOS floppies. This means that file access becomes transparent, i.e. the MSDOS files look and behave just like all other Unix files. If you want to use umsdos, the Unix-like filesystem on top of DOS, which allows you to run Linux from within a DOS partition without repartitioning, you'll have to say Y or M here. If you have Windows 95 or Windows NT installed on your MSDOS partitions, you should use the VFAT filesystem (say Y to "vfat fs support" below), or you will not be able to see the long filenames generated by Windows 95 / Windows NT. This option will enlarge your kernel by about 7 KB. If unsure, answer Y. This will only work if you said Y to "fat fs support" as well. If you want to compile this as a module however ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called msdos.o. VFAT (Windows-95) fs support CONFIG_VFAT_FS This option provides support for normal Windows filesystems with long filenames. That includes non-compressed FAT-based filesystems used by Windows 95, Windows 98, Windows NT 4.0, and mtools. You cannot use the VFAT filesystem for your Linux root partition (the one containing the directory /); use UMSDOS instead if you want to run Linux from within a DOS partition (i.e. say Y to "umsdos: Unix like fs on top of std MSDOS fs", below). The VFAT support enlarges your kernel by about 10 KB and it only works if you said Y to the "fat fs support" above. Please read the file Documentation/filesystems/vfat.txt for details. If unsure, say Y. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called vfat.o. UMSDOS: Unix-like filesystem on top of standard MSDOS filesystem CONFIG_UMSDOS_FS Say Y here if you want to run Linux from within an existing DOS partition of your hard drive. The advantage of this is that you can get away without repartitioning your hard drive (which often implies backing everything up and restoring afterwards) and hence you're able to quickly try out Linux or show it to your friends; the disadvantage is that Linux becomes susceptible to DOS viruses and that UMSDOS is somewhat slower than ext2fs. Another use of UMSDOS is to write files with long unix filenames to MSDOS floppies; it also allows Unix-style softlinks and owner/permissions of files on MSDOS floppies. You will need a program called umssync in order to make use of umsdos; read Documentation/filesystems/umsdos.txt. To get utilities for initializing/checking UMSDOS filesystem, or latest patches and/or information, visit UMSDOS homepage at http://www.voyager.hr/~mnalis/umsdos/ . This option enlarges your kernel by about 28 KB and it only works if you said Y to both "fat fs support" and "msdos fs support" above. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called umsdos.o. Note that the filesystem of your root partition (the one containing the directory /) cannot be a module, so saying M could be dangerous. If unsure, say N. /proc filesystem support CONFIG_PROC_FS This is a virtual filesystem providing information about the status of the system. "Virtual" means that it doesn't take up any space on your hard disk: the files are created on the fly by the kernel when you try to access them. Also, you cannot read the files with older version of the program less: you need to use more or cat. It's totally cool; for example, "cat /proc/interrupts" gives information about what the different IRQs are used for at the moment (there is a small number of Interrupt ReQuest lines in your computer that are used by the attached devices to gain the CPU's attention -- often a source of trouble if two devices are mistakenly configured to use the same IRQ). The /proc filesystem is explained in the file Documentation/filesystems/proc.txt and on the proc(5) manpage ("man 5 proc"). This option will enlarge your kernel by about 67 KB. Several programs depend on this, so everyone should say Y here. NFS filesystem support CONFIG_NFS_FS If you are connected to some other (usually local) Unix computer (using SLIP, PLIP, PPP or Ethernet) and want to mount files residing on that computer (the NFS server) using the Network File Sharing protocol, say Y. "Mounting files" means that the client can access the files with usual UNIX commands as if they were sitting on the client's hard disk. For this to work, the server must run the programs nfsd and mountd (but does not need to have NFS filesystem support enabled in its kernel). NFS is explained in the Network Administrator's Guide, available from http://metalab.unc.edu/mdw/linux.html#guide , on its man page: "man nfs", and in the NFS-HOWTO. A superior but less widely used alternative to NFS is provided by the Coda filesystem; see "Coda filesystem support" below. If you say Y here, you should have said Y to TCP/IP networking also. This option would enlarge your kernel by about 27 KB. This filesystem is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module is called nfs.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. If you are configuring a diskless machine which will mount its root filesystem over NFS at boot time, say Y here and to "IP: kernel level autoconfiguration" above and to "Root file system on NFS" below. You cannot compile this driver as a module in this case. There are two packages designed for booting diskless machines over the net: netboot and etherboot, both available via FTP from ftp://metalab.unc.edu/pub/Linux/system/boot/ethernet/ . If you don't know what all this is about, say N. Root file system on NFS CONFIG_ROOT_NFS If you want your Linux box to mount its whole root filesystem (the one containing the directory /) from some other computer over the net via NFS (presumably because your box doesn't have a hard disk), say Y. Read Documentation/nfsroot.txt for details. It is likely that in this case, you also want to say Y to "IP: kernel level autoconfiguration" so that your box can discover its network address at boot time. Most people say N here. NFS server support CONFIG_NFSD If you want your Linux box to act as an NFS *server*, so that other computers on your local network which support NFS can access certain directories on your box transparently, you have two options: you can use the self-contained user space program nfsd, in which case you should say N here, or you can say Y and use the kernel based NFS server. The advantage of the kernel based solution is that it is faster. In either case, you will need support software; the respective locations are given in the file Documentation/Changes in the NFS section. Please read the NFS-HOWTO, available from http://www.linuxdoc.org/HOWTO/NFS-HOWTO.html . The NFS server is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module is called nfsd.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. If unsure, say N. Provide NFSv3 server support (EXPERIMENTAL) CONFIG_NFSD_V3 If you would like to include the NFSv3 server was well as the NFSv2 server, say Y here. File locking, via the NLMv4 protocol, is not supported yet. If unsure, say N. OS/2 HPFS filesystem support CONFIG_HPFS_FS OS/2 is IBM's operating system for PC's, the same as Warp, and HPFS is the filesystem used for organizing files on OS/2 hard disk partitions. Say Y if you want to be able to read files from an OS/2 HPFS partition of your hard drive. OS/2 floppies however are in regular MSDOS format, so you don't need this option in order to be able to read them. Read Documentation/filesystems/hpfs.txt. This filesystem is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module is called hpfs.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. If unsure, say N. Windows NT NTFS support (read only) CONFIG_NTFS_FS NTFS is the file system of Microsoft Windows NT. Say Y if you want to get read access to files on NTFS partitions of your hard drive. The Linux NTFS driver supports most of the mount options of the VFAT driver, see Documentation/filesystems/ntfs.txt. Saying Y here will give you read-only access to NTFS partitions. This code is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called ntfs.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. NTFS write support (DANGEROUS) CONFIG_NTFS_RW If you say Y here, you will (hopefully) be able to write to NTFS file systems as well as read from them. The read-write support in NTFS is far from being complete and is not well tested. If you enable this, back up your NTFS volume first since it may get damaged. If unsure, say N. System V and Coherent filesystem support (read only) CONFIG_SYSV_FS SCO, Xenix and Coherent are commercial Unix systems for Intel machines. Saying Y here would allow you to read from their floppies and hard disk partitions. If you have floppies or hard disk partitions like that, it is likely that they contain binaries from those other Unix systems; in order to run these binaries, you will want to install iBCS2 (Intel Binary Compatibility Standard is a kernel module which lets you run SCO, Xenix, Wyse, UnixWare, Dell Unix and System V programs under Linux and is often needed to run commercial software that's only available for those systems. It's available via FTP (user: anonymous) from ftp://tsx-11.mit.edu/pub/linux/BETA ). If you only intend to mount files from some other Unix over the network using NFS, you don't need the System V filesystem support (but you need NFS filesystem support obviously). Note that this option is generally not needed for floppies, since a good portable way to transport files and directories between unixes (and even other operating systems) is given by the tar program ("man tar" or preferably "info tar"). Note also that this option has nothing whatsoever to do with the option "System V IPC". Read about the System V filesystem in Documentation/filesystems/sysv-fs.txt. Saying Y here will enlarge your kernel by about 27 kB. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called sysv.o. If you haven't heard about all of this before, it's safe to say N. SYSV filesystem write support (DANGEROUS) CONFIG_SYSV_FS_WRITE If you say Y here, you will (hopefully) be able to write to System V and Coherent file systems as well as read from them. The read-write support in SYSV is not well tested yet. If you enable this, back up your SYSV/Coherent volumes first since they may get damaged. If unsure, say N. Amiga FFS filesystem support CONFIG_AFFS_FS The Fast File System (FFS) is the common filesystem used on hard disks by Amiga(tm) systems since AmigaOS Version 1.3 (34.20). Say Y if you want to be able to read and write files from and to an Amiga FFS partition on your hard drive. Amiga floppies however cannot be read with this driver due to an incompatibility of the floppy controller used in an Amiga and the standard floppy controller in PCs and workstations. Read Documentation/filesystems/affs.txt and fs/affs/Changes. With this driver you can also mount disk files used by Bernd Schmidt's Un*X Amiga Emulator (http://www.freiburg.linux.de/~uae/ ). If you want to do this, you will also need to say Y or M to "Loop device support", above. This filesystem is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module is called affs.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. If unsure, say N. Apple Macintosh filesystem support (EXPERIMENTAL) CONFIG_HFS_FS If you say Y here, you will be able to mount Macintosh-formatted floppy disks and hard drive partitions with full read-write access. Please read fs/hfs/HFS.txt to learn about the available mount options. This filesystem support is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module is called hfs.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. ROM filesystem support CONFIG_ROMFS_FS This is a very small read-only filesystem mainly intended for initial ram disks of installation disks, but it could be used for other read-only media as well. Read Documentation/filesystems/romfs.txt for details. This filesystem support is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module is called romfs.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. If you don't know whether you need it, then you don't need it: answer N. QNX4 filesystem support (read only) (EXPERIMENTAL) CONFIG_QNX4FS_FS This is the filesystem used by the operating system QNX 4. Say Y if you intend to mount QNX hard disks or floppies. Unless you say Y to "QNX4FS write support" below, you will only be able to read these filesystems. This filesystem support is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module is called qnx4.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. If you don't know whether you need it, then you don't need it: answer N. QNX4FS write support (DANGEROUS) CONFIG_QNX4FS_RW Say Y if you want to test write support for QNX4 filesystems. Kernel automounter support CONFIG_AUTOFS_FS The automounter is a tool to automatically mount remote filesystems on demand. This implementation is partially kernel-based to reduce overhead in the already-mounted case; this is unlike the BSD automounter (amd), which is a pure user space daemon. To use the automounter you need the user-space tools from ftp://ftp.kernel.org/pub/linux/daemons/autofs ; you also want to answer Y to "NFS filesystem support", below. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called autofs.o. If you are not a part of a fairly large, distributed network, you probably do not need an automounter, and can say N here. EFS filesystem support (read only) (EXPERIMENTAL) CONFIG_EFS_FS EFS is an older filesystem used for non-ISO9660 CDROMs and hard disk partitions by SGI's IRIX operating system (IRIX 6.0 and newer uses the XFS filesystem for hard disk partitions however). This implementation only offers read-only access. If you don't know what all this is about, it's safe to say N. For more information about EFS see its home page at http://aeschi.ch.eu.org/efs/ . If you want to compile the EFS filesystem support as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called efs.o. SGI disklabel support CONFIG_SGI_DISKLABEL Say Y to this only if you plan on mounting disks with SGI disklabels. This is not required to mount EFS-format CDROMs. UFS filesystem support (read only) CONFIG_UFS_FS BSD and derivate versions of Unix (such as SunOS, FreeBSD, NetBSD, OpenBSD and NeXTstep) use a filesystem called UFS. Some System V Unixes can create and mount hard disk partitions and diskettes using this filesystem as well. Saying Y here will allow you to read from these partitions; if you also want to write to them, say Y to the experimental "UFS filesystem write support", below. Please read the file Documentation/filesystems/ufs.txt for more information. If you only intend to mount files from some other Unix over the network using NFS, you don't need the UFS filesystem support (but you need NFS filesystem support obviously). Note that this option is generally not needed for floppies, since a good portable way to transport files and directories between unixes (and even other operating systems) is given by the tar program ("man tar" or preferably "info tar"). When accessing NeXTstep files, you may need to convert them from the NeXT character set to the Latin1 character set; use the program recode ("info recode") for this purpose. If you want to compile the UFS filesystem support as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called ufs.o. If you haven't heard about all of this before, it's safe to say N. UFS filesystem write support (DANGEROUS) CONFIG_UFS_FS_WRITE Say Y here if you want to try writing to UFS partitions. This is experimental, so you should back up your UFS partitions beforehand. Advanced partition selection CONFIG_PARTITION_ADVANCED Say Y here if you would like to use hard disks under Linux which were partitioned under an operating system running on a different architecture than your Linux system. Note that the answer to this question won't directly affect the kernel: saying N will just cause this configure script to skip all the questions about foreign partitioning schemes. If unsure, say N. Alpha OSF partition support CONFIG_OSF_PARTITION Say Y here if you would like to use hard disks under Linux which were partitioned on an Alpha machine. Macintosh partition map support CONFIG_MAC_PARTITION Say Y here if you would like to use hard disks under Linux which were partitioned on a Macintosh. PC BIOS (MSDOS partition tables) support CONFIG_MSDOS_PARTITION Say Y here if you would like to use hard disks under Linux which were partitioned on an x86 PC (not necessarily by DOS). BSD disklabel (FreeBSD partition tables) support CONFIG_BSD_DISKLABEL FreeBSD uses its own hard disk partition scheme on your PC. It requires only one entry in the primary partition table of your disk and manages it similarly to DOS extended partitions, putting in its first sector a new partition table in BSD disklabel format. Saying Y here allows you to read these disklabels and further mount FreeBSD partitions from within Linux if you have also said Y to "UFS filesystem support", above. If you don't know what all this is about, say N. Sun partition tables support CONFIG_SUN_PARTITION Like most systems, SunOS uses its own hard disk partition table format, incompatible with all others. Saying Y here allows you to read these partition tables and further mount SunOS partitions from within Linux if you have also said Y to "UFS filesystem support", above. This is mainly used to carry data from a SPARC under SunOS to your Linux box via a removable medium like magneto-optical or ZIP drives; note however that a good portable way to transport files and directories between unixes (and even other operating systems) is given by the tar program ("man tar" or preferably "info tar"). If you don't know what all this is about, say N. Solaris (x86) partition table support CONFIG_SOLARIS_X86_PARTITION Like most systems, Solaris x86 uses its own hard disk partition table format, incompatible with all others. Saying Y here allows you to read these partition tables and further mount Solaris x86 partitions from within Linux if you have also said Y to "UFS filesystem support", above. SGI partition support CONFIG_SGI_PARTITION Say Y here if you would like to be able to read the hard disk partition table format used by SGI machines. ADFS filesystem support (read only) (EXPERIMENTAL) CONFIG_ADFS_FS The Acorn Disc Filing System is the standard filesystem of the RiscOS operating system which runs on Acorn's ARM-based Risc PC systems and the Acorn Archimedes range of machines. If you say Y here, Linux will be able to read from ADFS partitions on hard drives and from ADFS-formatted floppy discs. The ADFS partition should be the first partition (i.e., /dev/[hs]d?1) on each of your drives. Please read the file Documentation/filesystems/adfs.txt for further details. This code is also available as a module called adfs.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. If unsure, say N. /dev/pts filesystem for Unix98 PTYs CONFIG_DEVPTS_FS You should say Y here if you said Y to "Unix98 PTY support" above. You'll then get a virtual filesystem which can be mounted on /dev/pts with "mount -t devpts". This, together with the pseudo terminal master multiplexer /dev/ptmx, is used for pseudo terminal support as described in The Open Group's Unix98 standard: in order to acquire a pseudo terminal, a process opens /dev/ptmx; the number of the pseudo terminal is then made available to the process and the pseudo terminal slave can be accessed as /dev/pts/. What was traditionally /dev/ttyp2 will then be /dev/pts/2, for example. The GNU C library glibc 2.1 contains the requisite support for this mode of operation; you also need client programs that use the Unix98 API. UnixWare slices support (EXPERIMENTAL) CONFIG_UNIXWARE_DISKLABEL Like some systems, UnixWare uses its own slice table inside a partition (VTOC - Virtual Table of Contents). Its format is incompatible with all other OSes. Saying Y here allows you to read VTOC and further mount UnixWare partitions read-only from within Linux if you have also said Y to "UFS filesystem support" or "System V and Coherent filesystem support", above. This is mainly used to carry data from a UnixWare box to your Linux box via a removable medium like magneto-optical, ZIP or removable IDE drives. Note, however, that a good portable way to transport files and directories between unixes (and even other operating systems) is given by the tar program ("man tar" or preferably "info tar"). If you don't know what all this is about, say N. SMB filesystem support (to mount Windows shares etc.) CONFIG_SMB_FS SMB (Server Message Block) is the protocol Windows for Workgroups (WfW), Windows 95/98, Windows NT and OS/2 Lan Manager use to share files and printers over local networks. Saying Y here allows you to mount their filesystems (often called "shares" in this context) and access them just like any other Unix directory. Currently, this works only if the Windows machines use TCP/IP as the underlying transport protocol, and not NetBEUI. For details, read Documentation/filesystems/smbfs.txt and the SMB-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . Note: if you just want your box to act as an SMB *server* and make files and printing services available to Windows clients (which need to have a TCP/IP stack), you don't need to say Y here; you can use the program samba (available via FTP (user: anonymous) in ftp://metalab.unc.edu/pub/Linux/system/network/samba ) for that. General information about how to connect Linux, Windows machines and Macs is on the WWW at http://www.eats.com/linux_mac_win.html . If you want to compile the SMB support as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called smbfs.o. Most people say N, however. Coda filesystem support (advanced network fs) CONFIG_CODA_FS Coda is an advanced network filesystem, similar to NFS in that it enables you to mount filesystems of a remote server and access them with regular Unix commands as if they were sitting on your hard disk. Coda has several advantages over NFS: support for disconnected operation (e.g. for laptops), read/write server replication, security model for authentication and encryption, persistent client caches and write back caching. If you say Y here, your Linux box will be able to act as a Coda *client*. You will need user level code as well, both for the client and server. Servers are currently user level, i.e. need no kernel support. Please read Documentation/filesystems/coda.txt and check out the Coda home page http://www.coda.cs.cmu.edu . If you want to compile the coda client support as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called coda.o. NCP filesystem support (to mount NetWare volumes) CONFIG_NCP_FS NCP (NetWare Core Protocol) is a protocol that runs over IPX and is used by Novell NetWare clients to talk to file servers. It is to IPX what NFS is to TCP/IP, if that helps. Saying Y here allows you to mount NetWare file server volumes and to access them just like any other Unix directory. For details, please read the file Documentation/filesystems/ncpfs.txt in the kernel source and the IPX-HOWTO from http://www.linuxdoc.org/docs.html#howto . You do not have to say Y here if you want your Linux box to act as a file *server* for Novell NetWare clients. General information about how to connect Linux, Windows machines and Macs is on the WWW at http://www.eats.com/linux_mac_win.html . If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called ncpfs.o. Say N unless you are connected to a Novell network. Packet signatures CONFIG_NCPFS_PACKET_SIGNING NCP allows packets to be signed for stronger security. If you want security, say Y. Normal users can leave it off. To be able to use packet signing you must use ncpfs > 2.0.12. Proprietary file locking CONFIG_NCPFS_IOCTL_LOCKING Allows locking of records on remote volumes. Say N unless you have special applications which are able to utilize this locking scheme. Clear remove/delete inhibit when needed CONFIG_NCPFS_STRONG Allows manipulation of files flagged as Delete or Rename Inhibit. To use this feature you must mount volumes with the ncpmount parameter "-s" (ncpfs-2.0.12 and newer). Say Y unless you are not mounting volumes with -f 444. Use NFS namespace when available CONFIG_NCPFS_NFS_NS Allows you to utilize NFS namespace on NetWare servers. It brings you case sensitive filenames. Say Y. You can disable it at mount-time with the `-N nfs' parameter of ncpmount. Use OS2/LONG namespace when available CONFIG_NCPFS_OS2_NS Allows you to utilize OS2/LONG namespace on NetWare servers. Filenames in this namespace are limited to 255 characters, they are case insensitive, and case in names is preserved. Say Y. You can disable it at mount time with the -N os2 parameter of ncpmount. Lowercase DOS filenames on LONG namespace volume CONFIG_NCPFS_SMALLDOS If you say Y here, every filename on a NetWare server volume using the OS2/LONG namespace and created under DOS or on a volume using DOS namespace will be converted to lowercase characters. Saying N here will give you these filenames in uppercase. This is only a cosmetic option since the OS2/LONG namespace is case insensitive. The only major reason for this option is backward compatibility when moving from DOS to OS2/LONG namespace support. Long filenames (created by Win95) will not be affected. This option does not solve the problem that filenames appear differently under Linux and under Windows, since Windows does an additional conversions on the client side. You can achieve similar effects by saying Y to "Allow using of Native Language Support" below. Allow mounting of volume subdirectories CONFIG_NCPFS_MOUNT_SUBDIR Allows you to mount not only whole servers or whole volumes, but also subdirectories from a volume. It can be used to reexport data and so on. There is no reason to say N, so Y is recommended unless you count every byte. To utilize this feature you must use ncpfs-2.0.12 or newer. NDS interserver authentication domains CONFIG_NCPFS_NDS_DOMAINS This allows storing NDS private keys in kernel space where they can be used to authenticate another server as interserver NDS accesses need it. You must use ncpfs-2.0.12.1 or newer to utilize this feature. Say Y if you are using NDS connections to NetWare servers. Do not say Y if security is primary for you because root can read your session key (from /proc/kcore). Allow using of Native Language Support CONFIG_NCPFS_NLS Allows you to use codepages and I/O charsets for file name translation between the server file system and input/output. This may be useful, if you want to access the server with other operating systems, e.g. Windows 95. See also NLS for more Information. To select codepages and I/O charsets use ncpfs-2.2.0.13 or newer. Symbolic links and mode permission bits CONFIG_NCPFS_EXTRAS This enables the use of symbolic links and an execute permission bit on NCPFS. The file server need not have long name space or NFS name space loaded for these to work. To use the new attributes, it is recommended to use the flags '-f 600 -d 755' on the ncpmount command line. nls codepage 437 CONFIG_NLS_CODEPAGE_437 The Microsoft fat filesystem family can deal with filenames in native language character sets. These character sets are stored in so-called DOS codepages. You need to include the appropriate codepage if you want to be able to read/write these filenames on DOS/Windows partitions correctly. This does apply to the filenames only, not to the file contents. You can include several codepages; say Y here if you want to include the DOS codepage that is used in the United States and parts of Canada. This is recommended. nls codepage 737 CONFIG_NLS_CODEPAGE_737 The Microsoft fat filesystem family can deal with filenames in native language character sets. These character sets are stored in so-called DOS codepages. You need to include the appropriate codepage if you want to be able to read/write these filenames on DOS/Windows partitions correctly. This does apply to the filenames only, not to the file contents. You can include several codepages; say Y here if you want to include the DOS codepage that is used for Greek. If unsure, say N. nls codepage 775 CONFIG_NLS_CODEPAGE_775 The Microsoft fat filesystem family can deal with filenames in native language character sets. These character sets are stored in so-called DOS codepages. You need to include the appropriate codepage if you want to be able to read/write these filenames on DOS/Windows partitions correctly. This does apply to the filenames only, not to the file contents. You can include several codepages; say Y here if you want to include the DOS codepage that is used for the Baltic Rim Languages. If unsure, say N. nls codepage 850 CONFIG_NLS_CODEPAGE_850 The Microsoft fat filesystem family can deal with filenames in native language character sets. These character sets are stored in so-called DOS codepages. You need to include the appropriate codepage if you want to be able to read/write these filenames on DOS/Windows partitions correctly. This does apply to the filenames only, not to the file contents. You can include several codepages; say Y here if you want to include the DOS codepage that is used for much of Europe -- United Kingdom, Germany, Spain, Italy, and [add more countries here]. It has some characters useful to many European languages that are not part of the US codepage 437. If unsure, say Y. nls codepage 852 CONFIG_NLS_CODEPAGE_852 The Microsoft fat filesystem family can deal with filenames in native language character sets. These character sets are stored in so-called DOS codepages. You need to include the appropriate codepage if you want to be able to read/write these filenames on DOS/Windows partitions correctly. This does apply to the filenames only, not to the file contents. You can include several codepages; say Y here if you want to include the Latin 2 codepage used by DOS for much of Central and Eastern Europe. It has all the required characters for these languages: Albanian, Croatian, Czech, English, Finnish, Hungarian, Irish, German, Polish, Romanian, Serbian (Latin transcription), Slovak, Slovenian, and Sorbian. nls codepage 855 CONFIG_NLS_CODEPAGE_855 The Microsoft fat filesystem family can deal with filenames in native language character sets. These character sets are stored in so-called DOS codepages. You need to include the appropriate codepage if you want to be able to read/write these filenames on DOS/Windows partitions correctly. This does apply to the filenames only, not to the file contents. You can include several codepages; say Y here if you want to include the DOS codepage for Cyrillic. nls codepage 857 CONFIG_NLS_CODEPAGE_857 The Microsoft fat filesystem family can deal with filenames in native language character sets. These character sets are stored in so-called DOS codepages. You need to include the appropriate codepage if you want to be able to read/write these filenames on DOS/Windows partitions correctly. This does apply to the filenames only, not to the file contents. You can include several codepages; say Y here if you want to include the DOS codepage for Turkish. nls codepage 860 CONFIG_NLS_CODEPAGE_860 The Microsoft fat filesystem family can deal with filenames in native language character sets. These character sets are stored in so-called DOS codepages. You need to include the appropriate codepage if you want to be able to read/write these filenames on DOS/Windows partitions correctly. This does apply to the filenames only, not to the file contents. You can include several codepages; say Y here if you want to include the DOS codepage for Portuguese. nls codepage 861 CONFIG_NLS_CODEPAGE_861 The Microsoft fat filesystem family can deal with filenames in native language character sets. These character sets are stored in so-called DOS codepages. You need to include the appropriate codepage if you want to be able to read/write these filenames on DOS/Windows partitions correctly. This does apply to the filenames only, not to the file contents. You can include several codepages; say Y here if you want to include the DOS codepage for Icelandic. nls codepage 862 CONFIG_NLS_CODEPAGE_862 The Microsoft fat filesystem family can deal with filenames in native language character sets. These character sets are stored in so-called DOS codepages. You need to include the appropriate codepage if you want to be able to read/write these filenames on DOS/Windows partitions correctly. This does apply to the filenames only, not to the file contents. You can include several codepages; say Y here if you want to include the DOS codepage for Hebrew. nls codepage 863 CONFIG_NLS_CODEPAGE_863 The Microsoft fat filesystem family can deal with filenames in native language character sets. These character sets are stored in so-called DOS codepages. You need to include the appropriate codepage if you want to be able to read/write these filenames on DOS/Windows partitions correctly. This does apply to the filenames only, not to the file contents. You can include several codepages; say Y here if you want to include the DOS codepage for Canadian French. nls codepage 864 CONFIG_NLS_CODEPAGE_864 The Microsoft fat filesystem family can deal with filenames in native language character sets. These character sets are stored in so-called DOS codepages. You need to include the appropriate codepage if you want to be able to read/write these filenames on DOS/Windows partitions correctly. This does apply to the filenames only, not to the file contents. You can include several codepages; say Y here if you want to include the DOS codepage for Arabic. nls codepage 865 CONFIG_NLS_CODEPAGE_865 The Microsoft fat filesystem family can deal with filenames in native language character sets. These character sets are stored in so-called DOS codepages. You need to include the appropriate codepage if you want to be able to read/write these filenames on DOS/Windows partitions correctly. This does apply to the filenames only, not to the file contents. You can include several codepages; say Y here if you want to include the DOS codepage for the Nordic European countries. nls codepage 866 CONFIG_NLS_CODEPAGE_866 The Microsoft fat filesystem family can deal with filenames in native language character sets. These character sets are stored in so-called DOS codepages. You need to include the appropriate codepage if you want to be able to read/write these filenames on DOS/Windows partitions correctly. This does apply to the filenames only, not to the file contents. You can include several codepages; say Y here if you want to include the DOS codepage for Cyrillic/Russian. nls codepage 869 CONFIG_NLS_CODEPAGE_869 The Microsoft fat filesystem family can deal with filenames in native language character sets. These character sets are stored in so-called DOS codepages. You need to include the appropriate codepage if you want to be able to read/write these filenames on DOS/Windows partitions correctly. This does apply to the filenames only, not to the file contents. You can include several codepages; say Y here if you want to include the DOS codepage for Greek. ### ### Why do we have two codepages for Greek and Cyrillic? ### nls codepage 874 CONFIG_NLS_CODEPAGE_874 The Microsoft fat filesystem family can deal with filenames in native language character sets. These character sets are stored in so-called DOS codepages. You need to include the appropriate codepage if you want to be able to read/write these filenames on DOS/Windows partitions correctly. This does apply to the filenames only, not to the file contents. You can include several codepages; say Y here if you want to include the DOS codepage for Thai. nls iso8859-1 CONFIG_NLS_ISO8859_1 If you want to display filenames with native language characters from the Microsoft fat filesystem family or from JOLIET CDROMs correctly on the screen, you need to include the appropriate input/output character sets. Say Y here for the Latin 1 character set, which covers most West European languages such as Albanian, Catalan, Danish, Dutch, English, Faeroese, Finnish, French, German, Galician, Irish, Icelandic, Italian, Norwegian, Portuguese, Spanish, and Swedish. It is also the default for the US. If unsure, say Y. nls iso8859-2 CONFIG_NLS_ISO8859_2 If you want to display filenames with native language characters from the Microsoft fat filesystem family or from JOLIET CDROMs correctly on the screen, you need to include the appropriate input/output character sets. Say Y here for the Latin 2 character set, which works for most Latin-written Slavic and Central European languages: Czech, German, Hungarian, Polish, Rumanian, Croatian, Slovak, Slovene. nls iso8859-3 CONFIG_NLS_ISO8859_3 If you want to display filenames with native language characters from the Microsoft fat filesystem family or from JOLIET CDROMs correctly on the screen, you need to include the appropriate input/output character sets. Say Y here for the Latin 3 character set, which is popular with authors of Esperanto, Galician, Maltese, and Turkish. nls iso8859-4 CONFIG_NLS_ISO8859_4 If you want to display filenames with native language characters from the Microsoft fat filesystem family or from JOLIET CDROMs correctly on the screen, you need to include the appropriate input/output character sets. Say Y here for the Latin 4 character set which introduces letters for Estonian, Latvian, and Lithuanian. It is an incomplete predecessor of Latin 6. nls iso8859-5 CONFIG_NLS_ISO8859_5 If you want to display filenames with native language characters from the Microsoft fat filesystem family or from JOLIET CDROMs correctly on the screen, you need to include the appropriate input/output character sets. Say Y here for ISO8859-5, a Cyrillic character set with which you can type Bulgarian, Byelorussian, Macedonian, Russian, Serbian, and Ukrainian. Note that the charset KOI8-R is preferred in Russia. nls iso8859-6 CONFIG_NLS_ISO8859_6 If you want to display filenames with native language characters from the Microsoft fat filesystem family or from JOLIET CDROMs correctly on the screen, you need to include the appropriate input/output character sets. Say Y here for ISO8859-6, the Arabic character set. nls iso8859-7 CONFIG_NLS_ISO8859_7 If you want to display filenames with native language characters from the Microsoft fat filesystem family or from JOLIET CDROMs correctly on the screen, you need to include the appropriate input/output character sets. Say Y here for ISO8859-7, the Modern Greek character set. nls iso8859-8 CONFIG_NLS_ISO8859_8 If you want to display filenames with native language characters from the Microsoft fat filesystem family or from JOLIET CDROMs correctly on the screen, you need to include the appropriate input/output character sets. Say Y here for ISO8859-8, the Hebrew character set. nls iso8859-9 CONFIG_NLS_ISO8859_9 If you want to display filenames with native language characters from the Microsoft fat filesystem family or from JOLIET CDROMs correctly on the screen, you need to include the appropriate input/output character sets. Say Y here for the Latin 5 character set, and it replaces the rarely needed Icelandic letters in Latin 1 with the Turkish ones. Useful in Turkey. nls iso8859-10 CONFIG_NLS_ISO8859_10 If you want to display filenames with native language characters from the Microsoft fat filesystem family or from JOLIET CDROMs correctly on the screen, you need to include the appropriate input/output character sets. Say Y here for the Latin 6 character set, which adds the last Inuit (Greenlandic) and Sami (Lappish) letters that were missing in Latin 4 to cover the entire Nordic area. NLS ISO 8859-14 (Latin 8; Celtic) CONFIG_NLS_ISO8859_14 If you want to display filenames with native language characters from the Microsoft fat filesystem family or from JOLIET CDROMs correctly on the screen, you need to include the appropriate input/output character sets. Say Y here for the Latin 8 character set, which adds the last accented vowels for Welsh (and Manx Gaelic) that were missing in Latin 1. http://linux.speech.cymru.org/ has further information. nls iso8859-15 CONFIG_NLS_ISO8859_15 If you want to display filenames with native language characters from the Microsoft fat filesystem family or from JOLIET CDROMs correctly on the screen, you need to include the appropriate input/output character sets. Say Y here for the Latin 9 character set, which covers most West European languages such as Albanian, Catalan, Danish, Dutch, English, Estonian, Faeroese, Finnish, French, German, Galician, Irish, Icelandic, Italian, Norwegian, Portuguese, Spanish, and Swedish. Latin 9 is an update to Latin 1 (ISO 8859-1) that removes a handful of rarely used characters and instead adds support for Estonian, corrects the support for French and Finnish, and adds the new Euro character. If unsure, say Y. nls koi8-r CONFIG_NLS_KOI8_R If you want to display filenames with native language characters from the Microsoft fat filesystem family or from JOLIET CDROMs correctly on the screen, you need to include the appropriate input/output character sets. Say Y here for the preferred Russian character set. Virtual terminal CONFIG_VT If you say Y here, you will get support for terminal devices with display and keyboard devices. These are called "virtual" because you can run several virtual terminals (also called virtual consoles) on one physical terminal. This is rather useful, for example one virtual terminal can collect system messages and warnings, another one can be used for a text-mode user session, and a third could run an X session, all in parallel. Switching between virtual terminals is done with certain key combinations, usually Alt-. The setterm command ("man setterm") can be used to change the properties (such as colors) of a virtual terminal. You need at least one virtual terminal device in order to make use of your keyboard and monitor. Therefore, only people configuring an embedded system would want to say N here in order to save some memory; the only way to log into such a system is then via a serial or network connection. If unsure, say Y, or else you won't be able to do much with your new shiny Linux system :-) Support for console on virtual terminal CONFIG_VT_CONSOLE The system console is the device which receives all kernel messages and warnings and which allows logins in single user mode. If you answer Y here, a virtual terminal (the device used to interact with a physical terminal) can be used as system console. This is the most common mode of operations, so you should say Y here unless you want the kernel messages be output only to a serial port (in which case you should say Y to "Console on serial port", below). If you do say Y here, by default the currently visible virtual terminal (/dev/tty0) will be used as system console. You can change that with a kernel command line option such as "console=tty3" which would use the third virtual terminal as system console. (Try "man bootparam" or see the documentation of your boot loader (lilo or loadlin) about how to pass options to the kernel at boot time. The lilo procedure is also explained in the SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto .) If unsure, say Y. Software generated cursor CONFIG_SOFTCURSOR If you say Y here, you'll be able to do lots of nice things with the cursors of your virtual consoles -- for example turn them into non-blinking block cursors which are more visible on laptop screens, or change their colors depending on the virtual console they're on. See Documentation/VGA-softcursor.txt for more information. Support for PowerMac keyboard CONFIG_MAC_KEYBOARD This option allows you to use an ADB keyboard attached to your machine. Note that this disables any other (ie. PS/2) keyboard support, even if your machine is physically capable of using both at the same time. If you use an ADB keyboard (4 pin connector), say Y here. If you use a PS/2 keyboard (6 pin connector), say N here. Standard/generic serial support CONFIG_SERIAL This selects whether you want to include the driver for the standard serial ports. The standard answer is Y. People who might say N here are those that are setting up dedicated Ethernet WWW/FTP servers, or users that have one of the various bus mice instead of a serial mouse and don't intend to use their machine's standard serial port for anything. (Note that the Cyclades and Stallion multi serial port drivers do not need this driver built in for them to work.) If you want to compile this driver as a module, say M here and read Documentation/modules.txt. The module will be called serial.o. [WARNING: Do not compile this driver as a module if you are using non-standard serial ports, since the configuration information will be lost when the driver is unloaded. This limitation may be lifted in the future.] BTW1: If you have a mouseman serial mouse which is not recognized by the X window system, try running gpm first. BTW2: If you intend to use a software modem (also called Winmodem) under Linux, forget it. These modems are crippled and require proprietary drivers which are only available under Windows. Most people will say Y or M here, so that they can use serial mice, modems and similar devices connecting to the standard serial ports. Support for console on serial port CONFIG_SERIAL_CONSOLE If you say Y here, it will be possible to use a serial port as the system console (the system console is the device which receives all kernel messages and warnings and which allows logins in single user mode). This could be useful if some terminal or printer is connected to that serial port. Even if you say Y here, the currently visible virtual console (/dev/tty0) will still be used as the system console by default, but you can alter that using a kernel command line option such as "console=ttyS1". (Try "man bootparam" or see the documentation of your boot loader (lilo or loadlin) about how to pass options to the kernel at boot time. The lilo procedure is also explained in the SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto .) If you don't have a VGA card installed and you say Y here, the kernel will automatically use the first serial line, /dev/ttyS0, as system console. If unsure, say N. Support for PowerMac serial ports CONFIG_MAC_SERIAL If you have Macintosh style serial ports (8 pin mini-DIN), say Y here. If you also have regular serial ports and enable the driver for them, you can't currently use the serial console feature. Comtrol Rocketport support CONFIG_ROCKETPORT This is a driver for the Comtrol Rocketport cards which provide multiple serial ports. You would need something like this to connect more than two modems to your Linux box, for instance in order to become a dial-in server. If you want to compile this driver as a module, say M here and read Documentation/modules.txt. The module will be called rocket.o. Digiboard Intelligent async support CONFIG_DIGIEPCA This is a driver for Digi International's Xx, Xeve, and Xem series of cards which provide multiple serial ports. You would need something like this to connect more than two modems to your Linux box, for instance in order to become a dial-in server. This driver supports the original PC (ISA) boards as well as PCI, and EISA. If you have a card like this, say Y here and read the file Documentation/digiepca.txt. NOTE: There is another, separate driver for the Digiboard PC boards: "Digiboard PC/Xx Support" below. You should (and can) only select one of the two drivers. If you want to compile this driver as a module, say M here and read Documentation/modules.txt. The module will be called epca.o. Digiboard PC/Xx Support CONFIG_DIGI This is a driver for the Digiboard PC/Xe, PC/Xi, and PC/Xeve cards that give you many serial ports. You would need something like this to connect more than two modems to your Linux box, for instance in order to become a dial-in server. If you have a card like that, say Y here and read the file Documentation/digiboard.txt. If you want to compile this driver as a module, say M here and read Documentation/modules.txt. The module will be called pcxx.o. SDL RISCom/8 card support CONFIG_RISCOM8 This is a driver for the SDL Communications RISCom/8 multiport card, which gives you many serial ports. You would need something like this to connect more than two modems to your Linux box, for instance in order to become a dial-in server. If you have a card like that, say Y here and read the file Documentation/riscom8.txt. Also it's possible to say M here and compile this driver as kernel loadable module; the module will be called riscom8.o. Computone IntelliPort Plus serial support CONFIG_COMPUTONE This driver supports the entire family of Intelliport II/Plus controllers with the exception of the MicroChannel controllers. It does not support products previous to the Intelliport II. These are multiport cards, which give you many serial ports. You would need something like this to connect more than two modems to your Linux box, for instance in order to become a dial-in server. If you have a card like that, say Y here and read Documentation/computone.txt. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. You will get two modules called ip2.o and ip2main.o. Specialix IO8+ card support CONFIG_SPECIALIX This is a driver for the Specialix IO8+ multiport card (both the ISA and the PCI version) which gives you many serial ports. You would need something like this to connect more than two modems to your Linux box, for instance in order to become a dial-in server. If you have a card like that, say Y here and read the file Documentation/specialix.txt. Also it's possible to say M here and compile this driver as kernel loadable module which will be called specialix.o. Specialix DTR/RTS pin is RTS CONFIG_SPECIALIX_RTSCTS The Specialix card can only support either RTS or DTR. If you say N here, the driver will use the pin as "DTR" when the tty is in software handshake mode. If you say Y here or hardware handshake is on, it will always be RTS. Read the file Documentation/specialix.txt for more information. Cyclades async mux support CONFIG_CYCLADES This is a driver for a card that gives you many serial ports. You would need something like this to connect more than two modems to your Linux box, for instance in order to become a dial-in server. For information about the Cyclades-Z card, read drivers/char/README.cycladesZ. As of 1.3.9x kernels, this driver's minor numbers start at 0 instead of 32. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called cyclades.o. If you haven't heard about it, it's safe to say N. Cyclades-Z interrupt mode operation (EXPERIMENTAL) CONFIG_CYZ_INTR The Cyclades-Z family of multiport cards allows 2 (two) driver op modes: polling and interrupt. In polling mode, the driver will check the status of the Cyclades-Z ports every certain amount of time (which is called polling cycle and is configurable). In interrupt mode, it will use an interrupt line (IRQ) in order to check the status of the Cyclades-Z ports. The default op mode is polling. If unsure, say N. Stallion multiport serial support CONFIG_STALDRV Stallion cards give you many serial ports. You would need something like this to connect more than two modems to your Linux box, for instance in order to become a dial-in server. If you say Y here, you will be asked for your specific card model in the next questions. Make sure to read drivers/char/README.stallion in this case. If you have never heard about all this, it's safe to say N. Stallion EasyIO or EC8/32 support CONFIG_STALLION If you have an EasyIO or EasyConnection 8/32 multiport Stallion card, then this is for you; say Y. Make sure to read Documentation/stallion.txt. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called stallion.o. Stallion EC8/64, ONboard, Brumby support CONFIG_ISTALLION If you have an EasyConnection 8/64, ONboard, Brumby or Stallion serial multiport card, say Y here. Make sure to read Documentation/stallion.txt. To compile it as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called istallion.o. Microgate SyncLink adapter support CONFIG_SYNCLINK Provides support for the SyncLink ISA and PCI multiprotocol serial adapters. These adapters support asynchronous and HDLC bit synchronous communication up to 10Mbps (PCI adapter). This driver can only be built as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called synclink.o. If you want to do that, say M here. Synchronous HDLC line discipline support CONFIG_N_HDLC Allows synchronous HDLC communications with tty device drivers that support synchronous HDLC such as the Microgate SyncLink adapter. This driver can only be built as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called n_hdlc.o. If you want to do that, say M here. Specialix SX (and SI) card support CONFIG_SX This is a driver for the SX and SI multiport serial cards. Please read the file Documentation/sx.txt for details. This driver can only be built as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called sx.o. If you want to do that, say M here. Hayes ESP serial port support CONFIG_ESPSERIAL This is a driver which supports Hayes ESP serial ports. Both single port cards and multiport cards are supported. Make sure to read Documentation/hayes-esp.txt. To compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called esp.o. If unsure, say N. Multi-Tech multiport card support (EXPERIMENTAL) CONFIG_ISI This is a driver for the Multi-Tech cards which provide several serial ports. The driver is experimental and can currently only be built as a module ( = code which can be inserted in and removed from the running kernel whenever you want). Please read Documentation/modules.txt. The module will be called isicom.o Unix98 PTY support CONFIG_UNIX98_PTYS A pseudo terminal (PTY) is a software device consisting of two halves: a master and a slave. The slave device behaves identical to a physical terminal; the master device is used by a process to read data from and write data to the slave, thereby emulating a terminal. Typical programs for the master side are telnet servers and xterms. Linux has traditionally used the BSD-like names /dev/ptyxx for masters and /dev/ttyxx for slaves of pseudo terminals. This scheme has a number of problems. The GNU C library glibc 2.1 and later, however, supports the Unix98 naming standard: in order to acquire a pseudo terminal, a process opens /dev/ptmx; the number of the pseudo terminal is then made available to the process and the pseudo terminal slave can be accessed as /dev/pts/. What was traditionally /dev/ttyp2 will then be /dev/pts/2, for example. The entries in /dev/pts/ are created on the fly by a virtual filesystem; therefore, if you say Y here you should say Y to "/dev/pts filesystem for Unix98 PTYs" as well. If you want to say Y here, you need to have the C library glibc 2.1 or later (equal to libc-6.1, check with "ls -l /lib/libc.so.*"). Read the instructions in Documentation/Changes pertaining to pseudo terminals. It's safe to say N. Maximum number of Unix98 PTYs in use (0-2048) CONFIG_UNIX98_PTY_COUNT The maximum number of Unix98 PTYs that can be used at any one time. The default is 256, and should be enough for desktop systems. Server machines which support incoming telnet/rlogin/ssh connections and/or serve several X terminals may want to increase this: every incoming connection and every xterm uses up one PTY. When not in use, each additional set of 256 PTYs occupy approximately 8 KB of kernel memory on 32-bit architectures. Parallel printer support CONFIG_PRINTER If you intend to attach a printer to the parallel port of your Linux box (as opposed to using a serial printer; if the connector at the printer has 9 or 25 holes ["female"], then it's serial), say Y. Also read the Printing-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . It is possible to share one parallel port among several devices (e.g. printer and ZIP drive) and it is safe to compile the corresponding drivers into the kernel. If you want to compile this driver as a module however ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt and Documentation/parport.txt. The module will be called lp.o. If you have several parallel ports, you can specify which ports to use with the "lp" kernel command line option. (Try "man bootparam" or see the documentation of your boot loader (lilo or loadlin) about how to pass options to the kernel at boot time. The lilo procedure is also explained in the SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto .) The syntax of the "lp" command line option can be found in drivers/char/lp.c. If you have more than 3 printers, you need to increase the LP_NO variable in lp.c. Support for console on line printer CONFIG_LP_CONSOLE If you want kernel messages to be printed out as they occur, you can have a console on the printer. This option adds support for doing that; to actually get it to happen you need to pass the option "console=lp" to the kernel at boot time. Note that kernel messages can get lost if the printer is out of paper (or off, or unplugged, or too busy..), but this behaviour can be changed. See drivers/char/lp.c (do this at your own risk). If unsure, say N. Bus Mouse Support CONFIG_BUSMOUSE Say Y here if your machine has a bus mouse as opposed to a serial mouse. Most people have a regular serial MouseSystem or Microsoft mouse (made by Logitech) that plugs into a COM port (rectangular with 9 or 25 pins). These people say N here. If you have something else, read the Busmouse-HOWTO, available from http://www.linuxdoc.org/docs.html#howto , and say Y here. If you have a laptop, you either have to check the documentation or experiment a bit to find out whether the trackball is a serial mouse or not; it's best to say Y here for you. This is the generic bus mouse driver code. If you have a bus mouse, you will have to say Y here and also to the specific driver for your mouse below. This code is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called busmouse.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Mouse Support (not serial and bus mice) CONFIG_MOUSE This is for machines with a mouse which is neither a serial nor a bus mouse. Examples are PS/2 mice (such as the track balls on some laptops) and some digitizer pads. Most people have a regular serial MouseSystem or Microsoft mouse (made by Logitech) that plugs into a COM port (rectangular with 9 or 25 pins). These people say N here. If you have something else, read the Busmouse-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This HOWTO contains information about all non-serial mice, not just bus mice. If you have a laptop, you either have to check the documentation or experiment a bit to find out whether the trackball is a serial mouse or not; it's best to say Y here for you. Note that the answer to this question won't directly affect the kernel: saying N will just cause this configure script to skip all the questions about non-serial mice. If unsure, say Y. Logitech busmouse support CONFIG_LOGIBUSMOUSE Logitech mouse connected to a proprietary interface card. It's generally a round connector with 9 pins. Note that the newer mice made by Logitech don't use the Logitech protocol anymore; for those, you don't need this option. You want to read the Busmouse-HOWTO , available from http://www.linuxdoc.org/docs.html#howto . If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called busmouse.o. If you are unsure, say N and read the HOWTO nevertheless: it will tell you what you have. PS/2 mouse (aka "auxiliary device") support CONFIG_PSMOUSE The PS/2 mouse connects to a special mouse port that looks much like the keyboard port (small circular connector with 6 pins). This way, the mouse does not use any serial ports. This port can also be used for other input devices like light pens, tablets, keypads. Compaq, AST and IBM all use this as their mouse port on currently shipping machines. The trackballs of some laptops are PS/2 mice also. In particular, the C&T 82C710 mouse on TI Travelmates is a PS/2 mouse. Although PS/2 mice are not technically bus mice, they are explained in detail in the Busmouse-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . When using a PS/2 mouse, you can get problems if you want to use the mouse both on the Linux console and under X. Using the "-R" option of the Linux mouse managing program gpm (available from ftp://metalab.unc.edu/pub/Linux/system/mouse ) solves this problem, or you can get the "mconv2" utility from the same location. C&T 82C710 mouse port support (as on TI Travelmate) CONFIG_82C710_MOUSE This is a certain kind of PS/2 mouse used on the TI Travelmate. If you are unsure, try first to say N here and come back if the mouse doesn't work. Read the Busmouse-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . PC110 digitizer pad support CONFIG_PC110_PAD This drives the digitizer pad on the IBM PC110 palmtop. It can turn the digitizer pad into a PS/2 mouse emulation with tap gestures or into an absolute pad. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called pc110pad.o. Microsoft busmouse support CONFIG_MS_BUSMOUSE These animals (also called Inport mice) are connected to an expansion board using a round connector with 9 pins. If this is what you have, say Y and read the Busmouse-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . If you are unsure, say N and read the HOWTO nevertheless: it will tell you what you have. Also be aware that several vendors talk about 'Microsoft busmouse' and actually mean PS/2 busmouse -- so count the pins on the connector. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called msbusmouse.o. Apple Desktop Bus mouse support CONFIG_ADBMOUSE Say Y here if you have this type of bus mouse (4 pin connector) as is common on Macintoshes. You may want to read the Busmouse-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called adbmouse.o. ATIXL busmouse support CONFIG_ATIXL_BUSMOUSE This is a rare type of busmouse that is connected to the back of an ATI video card. Say Y if you have one of those. Note however that most mice by ATI are actually Microsoft busmice; you should say Y to "Microsoft busmouse support" above if you have one of those. Read the Busmouse-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called atixlmouse.o. If you are unsure, say N and read the HOWTO nevertheless: it will tell you what you have. QIC-02 tape support CONFIG_QIC02_TAPE If you have a non-SCSI tape drive like that, say Y. Or, if you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called tpqic02.o. Do you want runtime configuration for QIC-02 CONFIG_QIC02_DYNCONF You can either configure this driver once and for all by editing a header file (include/linux/tpqic02.h), in which case you should say N, or you can fetch a program via anonymous FTP which is able to configure this driver during runtime. The program to do this is called 'qic02conf' and it is part of the tpqic02-support-X.Y.tar.gz support package. If you want to use the qic02conf program, say Y. Floppy tape drive (QIC-80/40/3010/3020/TR-1/TR-2/TR-3) support CONFIG_FTAPE If you have a tape drive that is connected to your floppy controller, say Y here. Some tape drives (like the Seagate "Tape Store 3200" or the Iomega "Ditto 3200" or the Exabyte "Eagle TR-3") come with a "high speed" controller of their own. These drives (and their companion controllers) are also supported if you say Y here. If you have a special controller (such as the CMS FC-10, FC-20, Mountain Mach-II, or any controller that is based on the Intel 82078 FDC like the high speed controllers by Seagate and Exabyte and Iomega's "Ditto Dash") you must configure it by selecting the appropriate entries from the "Floppy tape controllers" sub-menu below and possibly modify the default values for the IRQ and DMA channel and the IO base in ftape's configuration menu. If you want to use your floppy tape drive on a PCI-bus based system, please read the file drivers/char/ftape/README.PCI. The ftape kernel driver is also available as a runtime loadable module ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. The module will be called ftape.o. Note that the Ftape-HOWTO is out of date (sorry) and documents the older version 2.08 of this software but still contains useful information. There is a web page with more recent documentation at http://www.math1.rwth-aachen.de/~heine/ftape/ . This page always contains the latest release of the ftape driver and useful information (backup software, ftape related patches and documentation, FAQ). Note that the file system interface has changed quite a bit compared to previous versions of ftape. Please read Documentation/ftape.txt. The file system interface for ftape CONFIG_ZFTAPE Normally, you want to say Y or M. DON'T say N here or you WON'T BE ABLE TO USE YOUR FLOPPY TAPE DRIVE. The ftape module itself no longer contains the routines necessary to interface with the kernel VFS layer (i.e. to actually write data to and read data from the tape drive). Instead the file system interface (i.e. the hardware independent part of the driver) has been moved to a separate module. If you say M zftape will be compiled as a runtime loadable module ( = code which can be inserted in and removed from the running kernel whenever you want). In this case you should read Documentation/modules.txt. The module will be called zftape.o. Regardless of whether you say Y or M here, an additional runtime loadable module called `zft-compressor.o' which contains code to support user transparent on-the-fly compression based on Ross William's lzrw3 algorithm will be produced. If you have enabled the kernel module loader (i.e. have said Y to "Kernel module loader support", above) then `zft-compressor.o' will be loaded automatically by zftape when needed. Despite its name, zftape does NOT use compression by default. The file Documentation/ftape.txt contains a short description of the most important changes in the file system interface compared to previous versions of ftape. The ftape home page http://www-math.math.rwth-aachen.de/~LBFM/claus/ftape/ contains further information. IMPORTANT NOTE: zftape can read archives created by previous versions of ftape and provide file mark support (i.e. fast skipping between tape archives) but previous version of ftape will lack file mark support when reading archives produced by zftape. Default block size for zftape CONFIG_ZFT_DFLT_BLK_SZ If unsure leave this at its default value, i.e. 10240. Note that you specify only the default block size here. The block size can be changed at run time using the MTSETBLK tape operation with the MTIOCTOP ioctl (i.e. with "mt -f /dev/qft0 setblk #BLKSZ" from the shell command line). The probably most striking difference between zftape and previous versions of ftape is the fact that all data must be written or read in multiples of a fixed block size. The block size defaults to 10240 which is what GNU tar uses. The values for the block size should be either 1 or multiples of 1024 up to a maximum value of 63488 (i.e. 62 K). If you specify `1' then zftape's builtin compression will be disabled. Reasonable values are `10240' (GNU tar's default block size), `5120' (afio's default block size), `32768' (default block size some backup programs assume for SCSI tape drives) or `1' (no restriction on block size, but disables builtin compression). Number of DMA buffers CONFIG_FT_NR_BUFFERS Please leave this at `3' unless you REALLY know what you are doing. It is not necessary to change this value. Values below 3 make the proper use of ftape impossible, values greater than 3 are a waste of memory. You can change the amount of DMA memory used by ftape at runtime with "mt -f /dev/qft0 setdrvbuffer #NUMBUFFERS". Each buffer wastes 32 KB of memory. Please note that this memory cannot be swapped out. Procfs entry for ftape CONFIG_FT_PROC_FS Optional. Saying Y will result in creation of a directory `/proc/ftape' under the proc file system. The files can be viewed with your favorite pager (i.e. use "more /proc/ftape/history" or "less /proc/ftape/history" or simply "cat /proc/ftape/history"). The file will contain some status information about the inserted cartridge, the kernel driver, your tape drive, the floppy disk controller and the error history for the most recent use of the kernel driver. Saying Y will enlarge the size of the ftape driver by approximately 2 KB. WARNING: When compiling ftape as a module (i.e. saying M to "Floppy tape drive") it is dangerous to use ftape's proc file system interface. Accessing `/proc/ftape' while the module is unloaded will result in a kernel Oops. This cannot be fixed from inside ftape. Controlling the amount of debugging output of ftape CONFIG_FT_NORMAL_DEBUG This option controls the amount of debugging output the ftape driver is ABLE to produce; it does not increase or diminish the debugging level itself. If unsure, leave this at its default setting, i.e. choose "Normal". Ftape can print lots of debugging messages to the system console resp. kernel log files. Reducing the amount of possible debugging output reduces the size of the kernel module by some KB, so it might be a good idea to use "None" for emergency boot floppies. If you want to save memory then the following strategy is recommended: leave this option at its default setting "Normal" until you know that the driver works as expected, afterwards reconfigure the kernel, this time specifying "Reduced" or "None" and recompile and install the kernel as usual. Note that choosing "Excessive" debugging output does not increase the amount of debugging output printed to the console but only makes it possible to produce "Excessive" debugging output. Please read Documentation/ftape.txt for a short description how to control the amount of debugging output. The floppy drive controller for ftape CONFIG_FT_STD_FDC Only change this setting if you have a special controller. If you didn't plug any add-on card into your computer system but just plugged the floppy tape cable into the already existing floppy drive controller then you don't want to change the default setting, i.e. choose "Standard". Choose "MACH-2" if you have a Mountain Mach-2 controller. Choose "FC-10/FC-20" if you have a Colorado FC-10 or FC-20 controller. Choose "Alt/82078" if you have another controller that is located at an IO base address different from the standard floppy drive controller's base address of `0x3f0', or uses an IRQ (interrupt) channel different from `6', or a DMA channel different from `2'. This is necessary for any controller card that is based on Intel's 82078 FDC such as Seagate's, Exabyte's and Iomega's "high speed" controllers. If you choose something other than "Standard" then please make sure that the settings for the IO base address and the IRQ and DMA channel in the configuration menus below are correct. Use the manual of your tape drive to determine the correct settings! If you are already successfully using your tape drive with another operating system then you definitely should use the same settings for the IO base, the IRQ and DMA channel that have proven to work with that other OS. Note that this menu lets you specify only the default setting for the hardware setup. The hardware configuration can be changed at boot time (when ftape is compiled into the kernel, i.e. if you have said Y to "Floppy tape drive") or module load time (i.e. if you have said M to "Floppy tape drive"). Please read also the file Documentation/ftape.txt which contains a short description of the parameters that can be set at boot or load time. If you want to use your floppy tape drive on a PCI-bus based system, please read the file drivers/char/ftape/README.PCI. IO base of the floppy disk controller used with Ftape CONFIG_FT_FDC_BASE You don't need to specify a value if the following default settings for the base IO address are correct: <<< MACH-2 : 0x1E0 >>> <<< FC-10/FC-20: 0x180 >>> <<< Secondary : 0x370 >>> Secondary refers to a secondary FDC controller like the "high speed" controllers delivered by Seagate or Exabyte or Iomega's Ditto Dash. Please make sure that the setting for the IO base address specified here is correct. USE THE MANUAL OF YOUR TAPE DRIVE OR CONTROLLER CARD TO DETERMINE THE CORRECT SETTING. If you are already successfully using the tape drive with another operating system then you definitely should use the same settings for the IO base that has proven to work with that other OS. Note that this menu lets you specify only the default setting for the IO base. The hardware configuration can be changed at boot time (when ftape is compiled into the kernel, i.e. if you specified Y to "Floppy tape drive") or module load time (i.e. if you have said M to "Floppy tape drive"). Please read also the file Documentation/ftape.txt which contains a short description of the parameters that can be set at boot or load time. IRQ channel for the floppy disk controller used with Ftape CONFIG_FT_FDC_IRQ You don't need to specify a value if the following default settings for the interrupt channel are correct: <<< MACH-2 : 6 >>> <<< FC-10/FC-20: 9 >>> <<< Secondary : 6 >>> Secondary refers to secondary a FDC controller like the "high speed" controllers delivered by Seagate or Exabyte or Iomega's Ditto Dash. Please make sure that the setting for the IO base address specified here is correct. USE THE MANUAL OF YOUR TAPE DRIVE OR CONTROLLER CARD TO DETERMINE THE CORRECT SETTING. If you are already successfully using the tape drive with another operating system then you definitely should use the same settings for the IO base that has proven to work with that other OS. Note that this menu lets you specify only the default setting for the IRQ channel. The hardware configuration can be changed at boot time (when ftape is compiled into the kernel, i.e. if you said Y to "Floppy tape drive") or module load time (i.e. if you said M to "Floppy tape drive"). Please read also the file Documentation/ftape.txt which contains a short description of the parameters that can be set at boot or load time. DMA channel for the floppy disk controller used with Ftape CONFIG_FT_FDC_DMA You don't need to specify a value if the following default settings for the DMA channel are correct: <<< MACH-2 : 2 >>> <<< FC-10/FC-20: 3 >>> <<< Secondary : 2 >>> Secondary refers to a secondary FDC controller like the "high speed" controllers delivered by Seagate or Exabyte or Iomega's Ditto Dash. Please make sure that the setting for the IO base address specified here is correct. USE THE MANUAL OF YOUR TAPE DRIVE OR CONTROLLER CARD TO DETERMINE THE CORRECT SETTING. If you are already successfully using the tape drive with another operating system then you definitely should use the same settings for the IO base that has proven to work with that other OS. Note that this menu lets you specify only the default setting for the DMA channel. The hardware configuration can be changed at boot time (when ftape is compiled into the kernel, i.e. if you said Y to "Floppy tape drive") or module load time (i.e. if you said M to "Floppy tape drive"). Please read also the file Documentation/ftape.txt which contains a short description of the parameters that can be set at boot or load time. FDC FIFO Threshold before requesting DMA service CONFIG_FT_FDC_THR Set the FIFO threshold of the FDC. If this is higher the DMA controller may serve the FDC after a higher latency time. If this is lower, fewer DMA transfers occur leading to less bus contention. You may try to tune this if ftape annoys you with "reduced data rate because of excessive overrun errors" messages. However, this doesn't seem to have too much effect. If unsure, don't touch the initial value, i.e. leave it at "8". FDC maximum data rate CONFIG_FT_FDC_MAX_RATE With some motherboard/FDC combinations ftape will not be able to run your FDC/tape drive combination at the highest available speed. If this is the case you'll encounter "reduced data rate because of excessive overrun errors" messages and lots of retries before ftape finally decides to reduce the data rate. In this case it might be desirable to tell ftape beforehand that it need not try to run the tape drive at the highest available speed. If unsure, leave this disabled, i.e. leave it at 2000 bits/sec. Direct Rendering Manager (XFree86 DRI support) CONFIG_DRM Kernel-level support for the Direct Rendering Infrastructure (DRI) introduced in XFree86 4.x. These modules provide support for synchronization, security, and DMA transfers. Select the module that provides support for your graphics card. tdfx Direct Rendering Manager (XFree86 DRI support) CONFIG_DRM_TDFX Choose M here if you have a 3dfx Banshee/Voodoo3 graphics card. 3dlabs GMX 2000 Direct Rendering Driver (XFree86 DRI support) CONFIG_DRM_GAMMA Choose M here if you have a 3dlabs GMX 2000 graphics card. MTRR control and configuration CONFIG_MTRR On Intel P6 family processors (Pentium Pro, Pentium II and later) the Memory Type Range Registers (MTRRs) may be used to control processor access to memory ranges. This is most useful when you have a video (VGA) card on a PCI or AGP bus. Enabling write-combining allows bus write transfers to be combined into a larger transfer before bursting over the PCI/AGP bus. This can increase performance of image write operations 2.5 times or more. This option creates a /proc/mtrr file which may be used to manipulate your MTRRs. Typically the X server should use this. This should have a reasonably generic interface so that similar control registers on other processors can be easily supported. The Cyrix 6x86, 6x86MX and M II processors have Address Range Registers (ARRs) which provide a similar functionality to MTRRs. For these, the ARRs are used to emulate the MTRRs, which means that it makes sense to say Y here for these processors as well. The AMD K6-2 (stepping 8 and above) and K6-3 processors have two MTRRs. The Centaur C6 (WinChip) has 8 MCRs, allowing write-combining. All of these processors are supported by this code. The Centaur C6 (WinChip) has 8 MCRs, allowing write-combining. These are supported. Saying Y here also fixes a problem with buggy SMP BIOSes which only set the MTRRs for the boot CPU and not the secondary CPUs. This can lead to all sorts of problems. You can safely say Y even if your machine doesn't have MTRRs, you'll just add about 9K to your kernel. See Documentation/mtrr.txt for more information. Main CPU frequency, only for DEC alpha machine CONFIG_FT_ALPHA_CLOCK On some DEC Alpha machines the CPU clock frequency cannot be determined automatically, so you need to specify it here ONLY if running a DEC Alpha, otherwise this setting has no effect. Zilog serial support CONFIG_SUN_ZS This driver does not exist at this point, so you might as well say N. Double Talk PC internal speech card support CONFIG_DTLK This driver is for the DoubleTalk PC, a speech synthesizer manufactured by RC Systems (http://www.rcsys.com/ ). It is also called the `internal DoubleTalk'. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called dtlk.o. Siemens R3964 serial protocol support CONFIG_R3964 This driver allows synchronous communication with devices using the Siemens R3964 packet protocol. Unless you are dealing with special hardware like PLCs, you are unlikely to need this. To compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called n_r3964.o. If unsure, say N. Applicom intelligent fieldbus card support CONFIG_APPLICOM This driver provides the kernel-side support for the intelligent fieldbus cards made by Applicom International. More information about these cards can be found on the WWW at the address http://www.applicom-int.com/ , or by email from David Woodhouse . To compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called applicom.o. If unsure, say N. Advanced Power Management CONFIG_APM APM is a BIOS specification for saving power using several different techniques. This is mostly useful for battery powered laptops with APM compliant BIOSes. If you say Y here, the system time will be reset after a RESUME operation, the /proc/apm device will provide battery status information, and user-space programs will receive notification of APM "events" (e.g. battery status change). If you select "Y" here, you can disable actual use of the APM BIOS by passing the "apm=off" option to the kernel at boot time. Note that the APM support is almost completely disabled for machines with more than one CPU. Supporting software is available; for more information, read the Battery Powered Linux mini-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . This driver does not spin down disk drives (see the hdparm(8) manpage ("man 8 hdparm") for that), and it doesn't turn off VESA-compliant "green" monitors. This driver does not support the TI 4000M TravelMate and the ACER 486/DX4/75 because they don't have compliant BIOSes. Many "green" desktop machines also don't have compliant BIOSes, and this driver may cause those machines to panic during the boot phase. If you are running Linux on a laptop, you may also want to read the Linux Laptop home page on the WWW at http://www.cs.utexas.edu/users/kharker/linux-laptop/ . Generally, if you don't have a battery in your machine, there isn't much point in using this driver and you should say N. If you get random kernel OOPSes or reboots that don't seem to be related to anything, try disabling/enabling this option (or disabling/enabling APM in your BIOS). Some other things you should try when experiencing seemingly random, "weird" problems: 1) make sure that you have enough swap space and that it is enabled. 2) pass the "no-hlt" option to the kernel 3) switch on floating point emulation in the kernel and pass the "no387" option to the kernel 4) pass the "floppy=nodma" option to the kernel 5) pass the "mem=4M" option to the kernel (thereby disabling all but the first 4 MB of RAM) 6) make sure that the CPU is not over clocked. 7) read the sig11 FAQ at http://www.bitwizard.nl/sig11/ 8) disable the cache from your BIOS settings 9) install a fan for the video card or exchange video RAM 10) install a better fan for the CPU 11) exchange RAM chips 12) exchange the motherboard. Ignore USER SUSPEND CONFIG_APM_IGNORE_USER_SUSPEND This option will ignore USER SUSPEND requests. On machines with a compliant APM BIOS, you want to say N. However, on the NEC Versa M series notebooks, it is necessary to say Y because of a BIOS bug. Enable APM at boot time CONFIG_APM_DO_ENABLE Enable APM features at boot time. From page 36 of the APM BIOS specification: "When disabled, the APM BIOS does not automatically power manage devices, enter the Standby State, enter the Suspend State, or take power saving steps in response to CPU Idle calls." This driver will make CPU Idle calls when Linux is idle (unless this feature is turned off -- see "Do CPU IDLE calls", below). This should always save battery power, but more complicated APM features will be dependent on your BIOS implementation. You may need to turn this option off if your computer hangs at boot time when using APM support, or if it beeps continuously instead of suspending. Turn this off if you have a NEC UltraLite Versa 33/C or a Toshiba T400CDT. This is off by default since most machines do fine without this feature. Do CPU IDLE calls CONFIG_APM_CPU_IDLE Enable calls to APM CPU Idle/CPU Busy inside the kernel's idle loop. On some machines, this can activate improved power savings, such as a slowed CPU clock rate, when the machine is idle. These idle calls are made after the idle loop has run for some length of time (e.g., 333 mS). On some machines, this will cause a hang at boot time or whenever the CPU becomes idle. (On machines with more than one CPU, this option does nothing.) Enable console blanking using APM CONFIG_APM_DISPLAY_BLANK Enable console blanking using the APM. Some laptops can use this to turn off the LCD backlight when the screen blanker of the Linux virtual console blanks the screen. Note that this is only used by the virtual console screen blanker, and won't turn off the backlight when using the X Window system. This also doesn't have anything to do with your VESA-compliant power-saving monitor. Further, this option doesn't work for all laptops -- it might not turn off your backlight at all, or it might print a lot of errors to the console, especially if you are using gpm. Ignore multiple suspend/standby events CONFIG_APM_IGNORE_MULTIPLE_SUSPEND This option is necessary on the IBM Thinkpad 560, but should work on all other laptops. When the APM BIOS returns multiple suspend or standby events while one is already being processed they will be ignored. Without this the Thinkpad 560 has troubles with the user level daemon apmd, and with the PCMCIA package pcmcia-cs. Ignore multiple suspend/resume cycles CONFIG_APM_IGNORE_SUSPEND_BOUNCE This option is necessary on the Dell Inspiron 3200 and others, but should be safe for all other laptops. When enabled, a system suspend event that occurs within three seconds of a resume is ignored. Without this the Inspiron will shut itself off a few seconds after you open the lid, requiring you to press the power button to resume it a second time. Say Y. RTC stores time in GMT CONFIG_APM_RTC_IS_GMT Say Y here if your RTC (Real Time Clock a.k.a. hardware clock) stores the time in GMT (Greenwich Mean Time). Say N if your RTC stores localtime. It is in fact recommended to store GMT in your RTC, because then you don't have to worry about daylight savings time changes. The only reason not to use GMT in your RTC is if you also run a broken OS that doesn't understand GMT. Allow interrupts during APM BIOS calls CONFIG_APM_ALLOW_INTS Normally we disable external interrupts while we are making calls to the APM BIOS as a measure to lessen the effects of a badly behaving BIOS implementation. The BIOS should reenable interrupts if it needs to. Unfortunately, some BIOSes do not - especially those in many of the newer IBM Thinkpads. If you experience hangs when you suspend, try setting this to Y. Otherwise, say N. Entry point offset fix (some Acer laptops) CONFIG_APM_BAD_ENTRY_OFFSET Some implementations of the APM BIOS provide the driver with a bad entry point offset. If you set this option to Y, then the upper sixteen bits of the offset will be set to zero. This is usually unnecessary but harmless. This is required for the Acer Travelmate 510DX, Travelmate 510T and Extensa 503T. For others, say N. Use real mode APM BIOS call to power off CONFIG_APM_REAL_MODE_POWER_OFF Use real mode APM BIOS calls to switch off the computer. This is a work-around for a number of buggy BIOSes. Switch this option on if your computer crashes instead of powering off properly. Watchdog Timer Support CONFIG_WATCHDOG If you say Y here (and to one of the following options) and create a character special file /dev/watchdog with major number 10 and minor number 130 using mknod ("man mknod"), you will get a watchdog, i.e.: subsequently opening the file and then failing to write to it for longer than 1 minute will result in rebooting the machine. This could be useful for a networked machine that needs to come back online as fast as possible after a lock-up. There's both a watchdog implementation entirely in software (which can sometimes fail to reboot the machine) and a driver for hardware watchdog boards, which are more robust and can also keep track of the temperature inside your computer. For details, read Documentation/watchdog.txt in the kernel source. The watchdog is usually used together with the watchdog daemon which is available via FTP (user: anonymous) from ftp://tsx-11.mit.edu/pub/linux/sources/sbin/ . This daemon can also monitor NFS connections and can reboot the machine when the process table is full. If unsure, say N. Disable watchdog shutdown on close CONFIG_WATCHDOG_NOWAYOUT The default watchdog behaviour (which you get if you say N here) is to stop the timer if the process managing it closes the file /dev/watchdog. It's always remotely possible that this process might get killed. If you say Y here, the watchdog cannot be stopped once it has been started. WDT Watchdog timer CONFIG_WDT If you have a WDT500P or WDT501P watchdog board, say Y here, otherwise N. It is not possible to probe for this board, which means that you have to set the IO port and IRQ it uses in the kernel source at the top of drivers/char/wdt.c. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called wdt.o. WDT501 features CONFIG_WDT_501 Saying Y here and creating a character special file /dev/temperature with major number 10 and minor number 131 ("man mknod") will give you a thermometer inside your computer: reading from /dev/temperature yields one byte, the temperature in degrees Fahrenheit. This works only if you have a WDT501P watchdog board installed. Fan Tachometer CONFIG_WDT_501_FAN Enable the Fan Tachometer on the WDT501. Only do this if you have a fan tachometer actually set up. Software Watchdog CONFIG_SOFT_WATCHDOG A software monitoring watchdog. This will fail to reboot your system from some situations that the hardware watchdog will recover from. Equally it's a lot cheaper to install. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. The module will be called softdog.o. Berkshire Products PC Watchdog CONFIG_PCWATCHDOG This is the driver for the Berkshire Products PC Watchdog card. This card simply watches your kernel to make sure it doesn't freeze, and if it does, it reboots your computer after a certain amount of time. This driver is like the WDT501 driver but for different hardware. Please read Documentation/pcwd-watchdog.txt. The PC watchdog cards can be ordered from http://www.berkprod.com . This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module is called pcwd.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Most people will say N. Acquire SBC Watchdog Timer CONFIG_ACQUIRE_WDT This is the driver for the hardware watchdog on the PSC-6x86 Single Board Computer produced by Acquire Inc (and others). This watchdog simply watches your kernel to make sure it doesn't freeze, and if it does, it reboots your computer after a certain amount of time. This driver is like the WDT501 driver but for different hardware. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module is called pscwdt.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Most people will say N. Enhanced Real Time Clock Support CONFIG_RTC If you say Y here and create a character special file /dev/rtc with major number 10 and minor number 135 using mknod ("man mknod"), you will get access to the real time clock built into your computer. Every PC has such a clock built in. It can be used to generate signals from as low as 1Hz up to 8192Hz, and can also be used as a 24 hour alarm. It reports status information via the file /proc/rtc and its behaviour is set by various ioctls on /dev/rtc. If you run Linux on a multiprocessor machine and said Y to "Symmetric Multi Processing" above, you should say Y here to read and set the RTC in an SMP compatible fashion. If you think you have a use for such a device (such as periodic data sampling), then say Y here, and read Documentation/rtc.txt for details. Tadpole ANA H8 Support CONFIG_H8 The Hitachi H8/337 is a microcontroller used to deal with the power and thermal environment. If you say Y here, you will be able to communicate with it via a character special device. If unsure, say N. /dev/nvram support CONFIG_NVRAM If you say Y here and create a character special file /dev/nvram with major number 10 and minor number 144 using mknod ("man mknod"), you get read and write access to the 50 bytes of non-volatile memory in the real time clock (RTC), which is contained in every PC and most Ataris. This memory is conventionally called "CMOS RAM" on PCs and "NVRAM" on Ataris. /dev/nvram may be used to view settings there, or to change them (with some utility). It could also be used to frequently save a few bits of very important data that may not be lost over power-off and for which writing to disk is too insecure. Note however that most NVRAM space in a PC belongs to the BIOS and you should NEVER idly tamper with it. See Ralf Brown's interrupt list for a guide to the use of CMOS bytes by your BIOS. On Atari machines, /dev/nvram is always configured and does not need to be selected. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called nvram.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Joystick support CONFIG_JOYSTICK If you have a joystick, 6dof controller, gamepad, steering wheel, weapon control system or something like that you can say Y here to enable generic support for these controllers. You will also need to say Y or M to at least one of the hardware specific drivers. This will make the controllers available as /dev/jsX devices. Please read the file Documentation/joystick.txt which contains more information and the location of the joystick package that you'll need. Classic PC analog CONFIG_JOY_ANALOG Say Y here if you have a controller that connects to the PC gameport. This supports many different types, including joysticks with throttle control, with rudders, or with extensions like additional hats and buttons compatible with CH Flightstick Pro, ThrustMaster FCS or 6 and 8 button gamepads. For more information on how to use the driver please read Documentation/joystick.txt FPGaming and MadCatz A3D CONFIG_JOY_ASSASSIN Say Y here if you have an FPGaming or MadCatz controller using the A3D protocol over the PC gameport. For more information on how to use the driver please read Documentation/joystick.txt Gravis GrIP CONFIG_JOY_GRAVIS Say Y here if you have a Gravis controller using the GrIP protocol over the PC gameport. For more information on how to use the driver please read Documentation/joystick.txt Logitech ADI CONFIG_JOY_LOGITECH Say Y here if you have a Logitech controller using the ADI protocol over the PC gameport. For more information on how to use the driver please read Documentation/joystick.txt Microsoft SideWinder CONFIG_JOY_SIDEWINDER Say Y here if you have a Microsoft controller using the Digital Overdrive protocol over PC gameport. For more information on how to use the driver please read Documentation/joystick.txt ThrustMaster DirectConnect CONFIG_JOY_THRUSTMASTER Say Y here if you have a ThrustMaster controller using the DirectConnect (BSP) protocol over the PC gameport. For more information on how to use the driver please read Documentation/joystick.txt Creative Labs Blaster CONFIG_JOY_CREATIVE Say Y here if you have a Creative Labs controller using the Blaster protocol over the PC gameport. For more information on how to use the driver please read Documentation/joystick.txt PDPI Lightning 4 card CONFIG_JOY_LIGHTNING Say Y here if you have a PDPI Lightning 4 gamecard and an analog joystick or gamepad connected to it. For more information on how to use the driver please read Documentation/joystick.txt Trident 4DWave and Aureal Vortex gameport CONFIG_JOY_PCI Say Y here if you have a Trident 4DWave DX/NX or Aureal Vortex 1/2 card and want to use its gameport in its enhanced digital mode with and ordinary analog joystick. For more information on how to use the driver please read Documentation/joystick.txt Magellan and Space Mouse CONFIG_JOY_MAGELLAN Say Y here if you have a Magellan or Space Mouse 6DOF controller connected to your computer's serial port. For more information on how to use the driver please read Documentation/joystick.txt SpaceTec SpaceOrb 360 and SpaceBall Avenger CONFIG_JOY_SPACEORB Say Y here if you have a SpaceOrb 360 or SpaceBall Avenger 6DOF controller connected to your computer's serial port. For more information on how to use the driver please read Documentation/joystick.txt SpaceTec SpaceBall 4000 FLX CONFIG_JOY_SPACEBALL Say Y here if you have a SpaceTec SpaceBall 4000 FLX controller connected to your computer's serial port. For more information on how to use the driver please read Documentation/joystick.txt Logitech WingMan Warrior CONFIG_JOY_WARRIOR Say Y here if you have a Logitech WingMan Warrior controller connected to your computer's serial port. For more information on how to use the driver please read Documentation/joystick.txt NES, SNES, N64, PSX, Multi CONFIG_JOY_CONSOLE Say Y here if you have a Nintendo Entertainment System gamepad, Super Nintendo Entertainment System gamepad, Nintendo 64 gamepad, Sony PlayStation gamepad or a Multisystem -- Atari, Amiga, Commodore, Amstrad CPC joystick connected to your parallel port. For more information on how to use the driver please read Documentation/joystick.txt and Documentation/joystick-parport.txt Sega, Multi CONFIG_JOY_DB9 Say Y here if you have a Sega Master System gamepad, Sega Genesis gamepad, Sega Saturn gamepad, or a Multisystem -- Atari, Amiga, Commodore, Amstrad CPC joystick connected to your parallel port. For more information on how to use the driver please read Documentation/joystick.txt and Documentation/joystick-parport.txt TurboGraFX interface CONFIG_JOY_TURBOGRAFX Say Y here if you have the TurboGraFX interface by Steffen Schwenke, and want to use it with Multiststem -- Atari, Amiga, Commodore, Amstrad CPC joystick. For more information on how to use the driver please read Documentation/joystick.txt and Documentation/joystick-parport.txt Amiga joysticks CONFIG_JOY_AMIGA Say Y here if you have an Amiga with a digital joystick connected to it. For more information on how to use the driver please read Documentation/joystick.txt Atomwide Serial Support CONFIG_ATOMWIDE_SERIAL If you have an Atomwide Serial card for an Acorn system, say Y to this option. The driver can handle 1, 2, or 3 port cards. If unsure, say N The Serial Port Dual Serial Port CONFIG_DUALSP_SERIAL If you have the Serial Port's dual serial card for an Acorn system, say Y to this option. If unsure, say N NetWinder Button CONFIG_NWBUTTON If you say Y here and create a character device node /dev/nwbutton with major and minor numbers 10 and 158 ("man mknod"), then every time the orange button is pressed a number of times, the number of times the button was pressed will be written to that device. This is most useful for applications, as yet unwritten, which perform actions based on how many times the button is pressed in a row. Do not hold the button down for too long, as the driver does not alter the behaviour of the hardware reset circuitry attached to the button; it will still execute a hard reset if the button is held down for longer than approximately five seconds. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. The module will be called nwbutton.o. Most people will answer Y to this question and "Reboot Using Button" below to be able to initiate a system shutdown from the button. Reboot Using Button CONFIG_NWBUTTON_REBOOT If you say Y here, then you will be able to initiate a system shutdown and reboot by pressing the orange button a number of times. The number of presses to initiate the shutdown is two by default, but this can be altered by modifying the value of NUM_PRESSES_REBOOT in nwbutton.h and recompiling the driver or, if you compile the driver as a module, you can specify the number of presses at load time with "insmod button reboot_count=". Sound card support CONFIG_SOUND If you have a sound card in your computer, i.e. if it can say more than an occasional beep, say Y. Be sure to have all the information about your sound card and its configuration down (I/O port, interrupt and DMA channel), because you will be asked for it. You want to read the Sound-HOWTO, available from http://www.linuxdoc.org/docs.html#howto . General information about the modular sound system is contained in the files Documentation/sound/Introduction. The file Documentation/sound/README.OSS contains some slightly outdated but still useful information as well. If you have a PnP sound card and you want to configure it at boot time using the ISA PnP tools (read http://www.roestock.demon.co.uk/isapnptools/ ), then you need to compile the sound card support as a module ( = code which can be inserted in and removed from the running kernel whenever you want) and load that module after the PnP configuration is finished. To do this, say M here and read Documentation/modules.txt as well as Documentation/sound/README.modules; the module will be called soundcore.o. I'm told that even without a sound card, you can make your computer say more than an occasional beep, by programming the PC speaker. Kernel patches and supporting utilities to do that are in the pcsp package, available at ftp://ftp.infradead.org/pub/pcsp/. OSS sound modules CONFIG_SOUND_OSS OSS is the Open Sound System suite of sound card drivers. They make sound programming easier since they provide a common API. Say Y or M here (the module will be called sound.o) if you haven't found a driver for your sound card above, then pick your driver from the list below. Persistent DMA buffers CONFIG_SOUND_DMAP Linux can often have problems allocating DMA buffers for ISA sound cards on machines with more than 16MB of RAM. This is because ISA DMA buffers must exist below the 16MB boundary and it is quite possible that a large enough free block in this region cannot be found after the machine has been running for a while. If you say Y here the DMA buffers (64Kb) will be allocated at boot time and kept until the shutdown. This option is only useful if you said Y to "OSS sound modules", above. If you said M to "OSS sound modules" then you can get the persistent DMA buffer functionality by passing the command-line argument "dmabuf=1" to the sound.o module. Say Y unless you have 16MB or less RAM or a PCI sound card. Support for Aztech Sound Galaxy (non-PnP) cards CONFIG_SOUND_SGALAXY This module initializes the older non Plug and Play sound galaxy cards from Aztech. It supports the Waverider Pro 32 - 3D and the Galaxy Washington 16. Support for AD1816(A) based cards (EXPERIMENTAL) CONFIG_SOUND_AD1816 Say M here if you have a sound card based on the Analog Devices AD1816(A) chip. NOTE: This driver is still EXPERIMENTAL. See Documentation/sound/AD1816 for further information. Yamaha OPL3-SA1 audio controller CONFIG_SOUND_OPL3SA1 Say Y or M if you have a Yamaha OPL3-SA1 sound chip, which is usually built into motherboards. Read Documentation/sound/OPL3-SA for details. ProAudioSpectrum 16 support CONFIG_SOUND_PAS Answer Y only if you have a Pro Audio Spectrum 16, ProAudio Studio 16 or Logitech SoundMan 16 sound card. Don't answer Y if you have some other card made by Media Vision or Logitech since they are not PAS16 compatible. 100% Sound Blaster compatibles (SB16/32/64, ESS, Jazz16) support CONFIG_SOUND_SB Answer Y if you have an original Sound Blaster card made by Creative Labs or a 100% hardware compatible clone (like the Thunderboard or SM Games). For an unknown card you may answer Y if the card claims to be Sound Blaster-compatible. Please read the file Documentation/sound/Soundblaster. You should also say Y here for cards based on the Avance Logic ALS-007 chip (read Documentation/sound/ALS007) and for cards based on ESS chips (read Documentation/sound/ESS1868 and Documentation/sound/ESS). If you have an SB AWE 32 or SB AWE 64, say Y here and also to "Additional lowlevel drivers" and to "SB32/AWE support" below and read Documentation/sound/INSTALL.awe. If you have an IBM Mwave card, say Y here and read Documentation/sound/mwave. You can say M here to compile this driver as a module; the module is called sb.o. Generic OPL2/OPL3 FM synthesizer support CONFIG_SOUND_ADLIB Answer Y if your card has a FM chip made by Yamaha (OPL2/OPL3/OPL4). Answering Y is usually a safe and recommended choice, however some cards may have software (TSR) FM emulation. Enabling FM support with these cards may cause trouble (I don't currently know of any such cards, however). Please read the file Documentation/sound/OPL3 if your card has an OPL3 chip. If unsure, say Y. #Loopback MIDI device support #CONFIG_SOUND_VMIDI ### ### somebody please fill this in. ### # Gravis Ultrasound support CONFIG_SOUND_GUS Say Y here for any type of Gravis Ultrasound card, including the GUS or GUS MAX. See also Documentation/sound/ultrasound for more information on configuring this card with modules. MPU-401 support (NOT for SB16) CONFIG_SOUND_MPU401 Be careful with this question. The MPU401 interface is supported by all sound cards. However, some natively supported cards have their own driver for MPU401. Enabling this MPU401 option with these cards will cause a conflict. Also, enabling MPU401 on a system that doesn't really have a MPU401 could cause some trouble. If your card was in the list of supported cards, look at the card specific instructions in the drivers/sound/Readme.cards file. It's safe to answer Y if you have a true MPU401 MIDI interface card. 6850 UART support CONFIG_SOUND_UART6850 This option enables support for MIDI interfaces based on the 6850 UART chip. This interface is rarely found on sound cards. It's safe to answer N to this question. VIDC Sound CONFIG_VIDC_SOUND Say Y here for ARM systems with the VIDC video controller and 16-bit Linear sound DACs. If unsure, say N. PSS (AD1848, ADSP-2115, ESC614) support CONFIG_SOUND_PSS Answer Y or M if you have an Orchid SW32, Cardinal DSP16, Beethoven ADSP-16 or some other card based on the PSS chipset (AD1848 codec + ADSP-2115 DSP chip + Echo ESC614 ASIC CHIP). For more information on how to compile it into the kernel or as a module see the file Documentation/sound/PSS. Enable PSS mixer (Beethoven ADSP-16 and other compatible) CONFIG_PSS_MIXER Answer Y for Beethoven ADSP-16. You may try to say Y also for other cards if they have master volume, bass, treble, and you can't control it under Linux. If you answer N for Beethoven ADSP-16, you can't control master volume, bass, treble and synth volume. If you said M to "PSS support" above, you may enable or disable this PSS mixer with the module parameter pss_mixer. For more information see the file Documentation/sound/PSS. Have DSPxxx.LD firmware file CONFIG_PSS_HAVE_BOOT If you have the DSPxxx.LD file or SYNTH.LD file for you card, say Y to include this file. Without this file the synth device (OPL) may not work. Full pathname of DSPxxx.LD firmware file CONFIG_PSS_BOOT_FILE Enter the full pathname of your DSPxxx.LD file or SYNTH.LD file, starting from /. 16 bit sampling option of GUS (_NOT_ GUS MAX) CONFIG_SOUND_GUS16 Answer Y if you have installed the 16 bit sampling daughtercard on your GUS. Answer N if you have a GUS MAX, since saying Y here disables GUS MAX support. GUS MAX support CONFIG_SOUND_GUSMAX Answer Y only if you have a Gravis Ultrasound MAX. Microsoft Sound System support CONFIG_SOUND_MSS Again think carefully before answering Y to this question. It's safe to answer Y if you have the original Windows Sound System card made by Microsoft or Aztech SG 16 Pro (or NX16 Pro). Also you may say Y in case your card is NOT among these: ATI Stereo F/X, AdLib, Audio Excell DSP16, Cardinal DSP16, Ensoniq SoundScape (and compatibles made by Reveal and Spea), Gravis Ultrasound, Gravis Ultrasound ACE, Gravis Ultrasound Max, Gravis Ultrasound with 16 bit option, Logitech Sound Man 16, Logitech SoundMan Games, Logitech SoundMan Wave, MAD16 Pro (OPTi 82C929), Media Vision Jazz16, MediaTriX AudioTriX Pro, Microsoft Windows Sound System (MSS/WSS), Mozart (OAK OTI-601), Orchid SW32, Personal Sound System (PSS), Pro Audio Spectrum 16, Pro Audio Studio 16, Pro Sonic 16, Roland MPU-401 MIDI interface, Sound Blaster 1.0, Sound Blaster 16, Sound Blaster 16ASP, Sound Blaster 2.0, Sound Blaster AWE32, Sound Blaster Pro, TI TM4000M notebook, ThunderBoard, Turtle Beach Tropez, Yamaha FM synthesizers (OPL2, OPL3 and OPL4), 6850 UART MIDI Interface. For cards having native support in VoxWare, consult the card specific instructions in drivers/sound/Readme.cards. Some drivers have their own MSS support and saying Y to this option will cause a conflict. SGI Visual Workstation on-board audio CONFIG_SOUND_VWSND Say Y or M if you have an SGI Visual Workstation and you want to be able to use its on-board audio. Read Documentation/sound/visws for more info on this driver's capabilities. Ensoniq Soundscape support CONFIG_SOUND_SSCAPE Answer Y if you have a sound card based on the Ensoniq SoundScape chipset. Such cards are being manufactured at least by Ensoniq, Spea and Reveal (Reveal makes also other cards). MediaTriX AudioTriX Pro support CONFIG_SOUND_TRIX Answer Y if you have the AudioTriX Pro sound card manufactured by MediaTrix. Have TRXPRO.HEX firmware file CONFIG_TRIX_HAVE_BOOT The MediaTrix AudioTrix Pro has an on-board microcontroller which needs to be initialized by downloading the code from the file TRXPRO.HEX in the DOS driver directory. If you don't have the TRXPRO.HEX file handy you may skip this step. However, the SB and MPU-401 modes of AudioTrix Pro will not work without this file! Full pathname of TRXPRO.HEX firmware file CONFIG_TRIX_BOOT_FILE Enter the full pathname of your TRXPRO.HEX file, starting from /. Support for OPTi MAD16 and/or Mozart based cards CONFIG_SOUND_MAD16 Answer Y if your card has a Mozart (OAK OTI-601) or MAD16 (OPTi 82C928 or 82C929 or 82C931) audio interface chip. For the 82C931, please read drivers/sound/README.C931. These chips are currently quite common so it's possible that many no-name cards have one of them. In addition the MAD16 chip is used in some cards made by known manufacturers such as Turtle Beach (Tropez), Reveal (some models) and Diamond (latest ones). Note however that the Tropez sound cards have their own driver; if you have one of those, say N here and Y or M to "Full support for Turtle Beach WaveFront", below. See also Documentation/sound/Opti and Documentation/sound/MAD16 for more information on setting these cards up as modules. Full support for Turtle Beach WaveFront synth/sound cards CONFIG_SOUND_WAVEFRONT Answer Y or M if you have a Tropez Plus, Tropez or Maui sound card and read the files Documentation/sound/Wavefront and Documentation/sound/Tropez+. Support MIDI in older MAD16 based cards (requires SB) CONFIG_MAD16_OLDCARD Answer Y (or M) if you have an older card based on the C928 or Mozart chipset and you want to have MIDI support. If you enable this option you also need to enable support for Sound Blaster. Support for Crystal CS4232 based (PnP) cards CONFIG_SOUND_CS4232 Say Y here if you have a card based on the Crystal CS4232 chip set, which uses its own Plug and Play protocol. See Documentation/sound/CS4232 for more information on configuring this card. Support for Yamaha OPL3-SA2, SA3, and SAx based PnP cards CONFIG_SOUND_OPL3SA2 Say Y or M if you have a card based on one of these Yamaha sound chipsets. Read Documentation/sound/OPL3-SA2 for more information on configuring these cards. Support for Turtle Beach Wave Front (Maui, Tropez) synthesizers CONFIG_SOUND_MAUI Say Y here if you have a Turtle Beach Wave Front, Maui, or Tropez sound card. Have OSWF.MOT firmware file CONFIG_MAUI_HAVE_BOOT Turtle Beach Maui and Tropez sound cards have a microcontroller which needs to be initialized prior to use. OSWF.MOT is a file distributed with the card's DOS/Windows drivers. Answer Y if you have this file. Full pathname of OSWF.MOT firmware file CONFIG_MAUI_BOOT_FILE Enter the full pathname of your OSWF.MOT file, starting from /. Support for Turtle Beach MultiSound Classic, Tahiti, Monterey CONFIG_SOUND_MSNDCLAS Say M here if you have a Turtle Beach MultiSound Classic, Tahiti or Monterey (not for the Pinnacle or Fiji). See Documentation/sound/MultiSound for important information about this driver. Full pathname of MSNDINIT.BIN firmware file CONFIG_MSNDCLAS_INIT_FILE The MultiSound cards have two firmware files which are required for operation, and are not currently included. These files can be obtained from Turtle Beach. See Documentation/sound/MultiSound for information on how to obtain this. Full pathname of MSNDPERM.BIN firmware file CONFIG_MSNDCLAS_PERM_FILE The MultiSound cards have two firmware files which are required for operation, and are not currently included. These files can be obtained from Turtle Beach. See Documentation/sound/MultiSound for information on how to obtain this. Support for Turtle Beach MultiSound Pinnacle, Fiji CONFIG_SOUND_MSNDPIN Say M here if you have a Turtle Beach MultiSound Pinnacle or Fiji. See Documentation/sound/MultiSound for important information about this driver. Full pathname of PNDSPINI.BIN firmware file CONFIG_MSNDPIN_INIT_FILE The MultiSound cards have two firmware files which are required for operation, and are not currently included. These files can be obtained from Turtle Beach. See Documentation/sound/MultiSound for information on how to obtain this. Full pathname of PNDSPERM.BIN firmware file CONFIG_MSNDPIN_PERM_FILE The MultiSound cards have two firmware files which are required for operation, and are not currently included. These files can be obtained from Turtle Beach. See Documentation/sound/MultiSound for information on how to obtain this. MSND Pinnacle have S/PDIF I/O CONFIG_MSNDPIN_DIGITAL If you have the S/PDIF daughter board for the Pinnacle or Fiji, answer Y here; otherwise, say N. If you have this, you will be able to play and record from the S/PDIF port (digital signal). See Documentation/sound/MultiSound for information on how to make use of this capability. MSND Pinnacle non-PnP Mode CONFIG_MSNDPIN_NONPNP The Pinnacle and Fiji card resources can be configured either with PnP, or through a configuration port. Say Y here if your card is NOT in PnP mode. For the Pinnacle, configuration in non-PnP mode allows use of the IDE and joystick peripherals on the card as well; these do not show up when the card is in PnP mode. Specifying zero for any resource of a device will disable the device. If you are running the card in PnP mode, you must say N here and use isapnptools to configure the card's resources. MSND Pinnacle config port CONFIG_MSNDPIN_CFG This is the port which the Pinnacle and Fiji uses to configure the card's resources when not in PnP mode. If your card is in PnP mode, then be sure to say N to the previous option, "MSND Pinnacle Non-PnP Mode". MSND buffer size (kB) CONFIG_MSND_FIFOSIZE Configures the size of each audio buffer, in kilobytes, for recording and playing in the MultiSound drivers (both the Classic and Pinnacle). Larger values reduce the chance of data overruns at the expense of overall latency. If unsure, use the default. /dev/dsp and /dev/audio support CONFIG_SOUND_AUDIO If you say Y here, you will get the /dev/dsp and /dev/audio devices; these are the analog-digital and digital-analog converter devices and are very useful, so say Y. MIDI interface support CONFIG_SOUND_MIDI Answering N disables /dev/midixx devices and access to any MIDI ports using /dev/sequencer and /dev/music. This option also affects any MPU401 and/or General MIDI compatible devices. Answer Y. FM synthesizer (YM3812/OPL-3) support CONFIG_SOUND_YM3812 Answer Y here, unless you know you will not need the option. Sun Audio support CONFIG_SUN_AUDIO This is support for the sound cards on Sun workstations. The code does not exist yet, so you might as well say N here. Additional low level drivers CONFIG_LOWLEVEL_SOUND If you need additional low level sound drivers which have not yet appeared, say Y. The answer to this question does not directly affect the kernel; saying Y will simply cause this configure script to present you with more options. If unsure, say Y. ACI mixer (miroPCM12/PCM20) CONFIG_ACI_MIXER ACI (Audio Command Interface) is a protocol used to communicate with the microcontroller on some sound cards produced by miro, e.g. the miroSOUND PCM12 and PCM20. The main function of the ACI is to control the mixer and to get a product identification. This Voxware ACI driver currently only supports the ACI functions on the miroSOUND PCM12 and PCM20 cards. On the PCM20, ACI also controls the radio tuner. This is supported in the video4linux radio-miropcm20 driver. SB32/AWE support CONFIG_AWE32_SYNTH Say Y here if you have a Sound Blaster SB32, AWE32-PnP, SB AWE64 or similar sound card. See Documentation/sound/README.awe, Documentation/sound/AWE32 and the Soundblaster-AWE mini-HOWTO, available from http://www.linuxdoc.org/docs.html#howto for more info. Gallant's Audio Excel DSP 16 support (SC-6000 and SC-6600) CONFIG_AEDSP16 Answer Y if you have a Gallant's Audio Excel DSP 16 card. This driver supports Audio Excel DSP 16 but not the III nor PnP versions of this card. The Gallant's Audio Excel DSP 16 card can emulate either an SBPro or a Microsoft Sound System card, so you should have said Y to either "100% Sound Blaster compatibles (SB16/32/64, ESS, Jazz16) support" or "Microsoft Sound System support", above, and you need to answer the "MSS emulation" and "SBPro emulation" questions below accordingly. You should say Y to one and only one of these two questions. Read the drivers/sound/lowlevel/README.aedsp16 file and the head of drivers/sound/lowlevel/aedsp16.c as well as Documentation/sound/AudioExcelDSP16 to get more information about this driver and its configuration. I/O base for Audio Excel DSP 16 CONFIG_AEDSP16_BASE This is the base I/O address of the Audio Excel DSP 16 card. It must be 220 or 240. If you compiled aedsp16.o as a module you can specify this parameter as 'io=0xNNN'. Audio Excel DSP 16 (SBPro emulation) CONFIG_AEDSP16_SBPRO Answer Y if you want your audio card to emulate Sound Blaster Pro. You should then say Y to "100% Sound Blaster compatibles (SB16/32/64, ESS, Jazz16) support" and N to "Audio Excel DSP 16 (MSS emulation)". Audio Excel DSP 16 IRQ CONFIG_AEDSP16_SB_IRQ This is the IRQ of the Audio Excel DSP 16 card. It must be 5, 7, 9, 10 or 11. If you compiled aedsp16.o as a module you can specify this parameter as 'irq=NN'. Audio Excel DSP 16 DMA CONFIG_AEDSP16_SB_DMA This is the IRQ of the Audio Excel DSP 16 card. It must be 0, 1 or 3. If you compiled aedsp16.o as a module you can specify this parameter as 'dma=NN'. Audio Excel DSP 16 (MSS emulation) CONFIG_AEDSP16_MSS Answer Y if you want your audio card to emulate Microsoft Sound System. You should then say Y to "Microsoft Sound System support" and say N to "Audio Excel DSP 16 (SBPro emulation)". Audio Excel DSP 16 IRQ CONFIG_AEDSP16_MSS_IRQ This is the IRQ of the Audio Excel DSP 16 card. It must be 5, 7, 9, 10 or 11. If you compiled aedsp16.o as a module you can specify this parameter as 'irq=NN'. Audio Excel DSP 16 DMA CONFIG_AEDSP16_MSS_DMA This is the IRQ of the Audio Excel DSP 16 card. It must be 0, 1 or 3. If you compiled aedsp16.o as a module you can specify this parameter as 'dma=NN'. SC-6600 based audio cards (new Audio Excel DSP 16) CONFIG_SC6600 The SC6600 is the new version of DSP mounted on the Audio Excel DSP 16 cards. Find in the manual the FCC ID of your audio card and answer Y if you have an SC6600 DSP. SC-6600 Joystick Interface CONFIG_SC6600_JOY Say Y here in order to use the joystick interface of the Audio Excel DSP 16 card. SC-6600 CDROM Interface CONFIG_SC6600_CDROM This is used to activate the the CDROM interface of the Audio Excel DSP 16 card. Enter: 0 for Sony, 1 for Panasonic, 2 for IDE, 4 for no CDROM present. Audio Excel DSP 16 (MPU401 emulation) CONFIG_AEDSP16_MPU401 Answer Y if you want your audio card to emulate the MPU-401 midi interface. You should then also say Y to "MPU-401 support". Note that the I/O base for MPU-401 support of aedsp16 is the same you have selected for "MPU-401 support". If you are using this driver as a module you have to specify the MPU I/O base address with the parameter 'mpu_base=0xNNN'. MPU401 IRQ for Audio Excel DSP 16 CONFIG_AEDSP16_MPU_IRQ This is the IRQ of the MPU-401 emulation of your Audio Excel DSP 16 card. It must be 5, 7, 9, 10 or 0 (to disable MPU-401 interface). If you compiled aedsp16.o as a module you can specify this parameter as 'mpu_irq=NN'. Ensoniq ES1370 based PCI sound cards CONFIG_SOUND_ES1370 Say Y or M if you have a PCI sound card utilizing the Ensoniq ES1370 chipset, such as Ensoniq's AudioPCI (non-97). To find out if your sound card uses an ES1370 without removing your computer's cover, use lspci -n and look for the PCI ID 1274:5000. Since Ensoniq was bought by Creative Labs, Sound Blaster 64/PCI models are either ES1370 or ES1371 based. This driver differs slightly from OSS/Free, so PLEASE READ Documentation/sound/es1370. Ensoniq ES1371 based PCI sound cards CONFIG_SOUND_ES1371 Say Y or M if you have a PCI sound card utilizing the Ensoniq ES1371 chipset, such as Ensoniq's AudioPCI97. To find out if your sound card uses an ES1371 without removing your computer's cover, use lspci -n and look for the PCI ID 1274:1371. Since Ensoniq was bought by Creative Labs, Sound Blaster 64/PCI models are either ES1370 or ES1371 based. This driver differs slightly from OSS/Free, so PLEASE READ Documentation/sound/es1371. ESS Solo1 based PCI sound cards (eg. SC1938) CONFIG_SOUND_ESSSOLO1 Say Y or M if you have a PCI sound card utilizing the ESS Technology Solo1 chip. To find out if your sound card uses a Solo1 chip without removing your computer's cover, use lspci -n and look for the PCI ID 125D:1969. This driver differs slightly from OSS/Free, so PLEASE READ Documentation/sound/solo1. S3 SonicVibes based PCI sound cards CONFIG_SOUND_SONICVIBES Say Y or M if you have a PCI sound card utilizing the S3 SonicVibes chipset. To find out if your sound card uses a SonicVibes chip without removing your computer's cover, use lspci -n and look for the PCI ID 5333:CA00. This driver differs slightly from OSS/Free, so PLEASE READ Documentation/sound/sonicvibes. Rockwell WaveArtist CONFIG_SOUND_WAVEARTIST Say Y here to include support for the Rockwell WaveArtist sound system. This driver is mainly for the NetWinder. VIA 82Cxxx Audio Codec CONFIG_SOUND_VIA82CXXX Say Y here to include support for the audio codec found on VIA 82Cxxx-based chips. Typically these are built into a motherboard. DO NOT select SoundBlaster or Adlib with this driver, unless you have a SoundBlaster or Adlib card in addition to your VIA audio chip. NeoMagic 256AV/256ZX sound chipsets CONFIG_SOUND_NM256 Say M here to include audio support for the NeoMagic 256AV/256ZX chipsets. These are the audio chipsets found in the Sony Z505S/SX/DX, some Sony F-series, and the Dell Latitude CPi and CPt laptops. It includes support for an AC97-compatible mixer and an apparently proprietary sound engine. See Documentation/sound/NM256 for further information. ESS Maestro sound chipsets CONFIG_SOUND_MAESTRO Say Y or M if you have a sound system driven by ESS's Maestro line of PCI sound chips. These include the Maestro 1, Maestro 2, and Maestro 2E. See Documentation/sound/Maestro for more details. Are you using a crosscompiler CONFIG_CROSSCOMPILE Say Y here if you are compiling the kernel on a different architecture than the one it is intended to run on. Kernel support for Linux/MIPS 32-bit binary compatibility CONFIG_MIPS32_COMPAT Select this option this option if you want Linux/MIPS 32-bit binary compatibility. Since all software available available for Linux/MIPS is currently 32-bit you should say Y here. Build fp exception handler module CONFIG_MIPS_FPE_MODULE Build the floating point exception handler module. This option is only useful for people working on the floating point exception handler. If you don't, say N. Remote GDB kernel debugging CONFIG_REMOTE_DEBUG If you say Y here, it will be possible to remotely debug the MIPS kernel using gdb. This enlarges your kernel image disk size by several megabytes and requires a machine with more than 16 MB, better 32 MB RAM to avoid excessive linking time. This is only useful for kernel hackers. If unsure, say N. Magic System Request Key support CONFIG_MAGIC_SYSRQ If you say Y here, you will have some control over the system even if the system crashes for example during kernel debugging (e.g., you will be able to flush the buffer cache to disk, reboot the system immediately or dump some status information). This is accomplished by pressing various keys while holding SysRq (Alt+PrintScreen). The keys are documented in Documentation/sysrq.txt. Don't say Y unless you really know what this hack does. ISDN subsystem CONFIG_ISDN ISDN ("Integrated Services Digital Networks", called RNIS in France) is a special type of fully digital telephone service; it's mostly used to connect to your Internet service provider (with SLIP or PPP). The main advantage is that the speed is higher than ordinary modem/telephone connections, and that you can have voice conversations while downloading stuff. It only works if your computer is equipped with an ISDN card and both you and your service provider purchased an ISDN line from the phone company. For details, read http://alumni.caltech.edu/~dank/isdn/ on the WWW. This driver allows you to use an ISDN-card for networking connections and as dialin/out device. The isdn-tty's have a built in AT-compatible modem emulator. Network devices support autodial, channel-bundling, callback and caller-authentication without having a daemon running. A reduced T.70 protocol is supported with tty's suitable for German BTX. On D-Channel, the protocols EDSS1 (Euro-ISDN) and 1TR6 (German style) are supported. See Documentation/isdn/README for more information. If you want to compile the ISDN code as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called isdn.o. If unsure, say N. Support synchronous PPP CONFIG_ISDN_PPP Over digital connections such as ISDN, there is no need to synchronize sender and recipient's clocks with start and stop bits as is done over analog telephone lines. Instead, one can use "synchronous PPP". Saying Y here will include this protocol. This protocol is used by Cisco and Sun for example. So you want to say Y here if the other end of your ISDN connection supports it. You will need a special version of pppd (called ipppd) for using this feature. See Documentation/isdn/README.syncppp and Documentation/isdn/syncPPP.FAQ for more information. Support generic MP (RFC 1717) CONFIG_ISDN_MPP With synchronous PPP enabled, it is possible to increase throughput by bundling several ISDN-connections, using this protocol. See Documentation/isdn/README.syncppp for more information. Use VJ-compression with synchronous PPP CONFIG_ISDN_PPP_VJ This enables Van Jacobson header compression for synchronous PPP. Say Y if the other end of the connection supports it. Support audio via ISDN CONFIG_ISDN_AUDIO If you say Y here, the modem-emulator will support a subset of the EIA Class 8 Voice commands. Using a getty with voice-support (mgetty+sendfax by gert@greenie.muc.de with an extension, available with the ISDN utility package for example), you will be able to use your Linux box as an ISDN-answering machine. Of course, this must be supported by the lowlevel driver also. Currently, the HiSax driver is the only voice-supporting driver. See Documentation/isdn/README.audio for more information. X.25 PLP on top of ISDN CONFIG_ISDN_X25 This feature provides the X.25 protocol over ISDN connections. See Documentation/isdn/README.x25 for more information if you are thinking about using this. ISDN diversion services support CONFIG_ISDN_DIVERSION This option allows you to use some supplementary diversion services in conjunction with the HiSax driver on an EURO/DSS1 line. Supported options are CD (call deflection), CFU (Call forward unconditional), CFB (Call forward when busy) and CFNR (call forward not reachable). Additionally the actual CFU, CFB and CFNR state may be interrogated. The use of CFU, CFB, CFNR and interrogation may be limited to some countries. The keypad protocol is still not implemented. CD should work in all countries if the service has been subscribed to. Please read the file Documentation/isdn/README.diversion. ICN 2B and 4B support CONFIG_ISDN_DRV_ICN This enables support for two kinds of ISDN-cards made by a German company called ICN. 2B is the standard version for a single ISDN line with two B-channels, 4B supports two ISDN lines. For running this card, additional firmware is necessary, which has to be downloaded into the card using a utility which is distributed separately. See Documentation/isdn/README and README.icn for more information. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called icn.o. isdnloop support CONFIG_ISDN_DRV_LOOP This driver provides a virtual ISDN card. Its primary purpose is testing of linklevel features or configuration without getting charged by your service-provider for lots of phone calls. You need will need the loopctrl utility from the latest isdn4k-utils package to set up this driver. HiSax SiemensChipSet driver support CONFIG_ISDN_DRV_HISAX This is a driver supporting the Siemens chipset on various ISDN-cards (like AVM A1, Elsa ISDN cards, Teles S0-16.0, Teles S0-16.3, Teles S0-8, Teles/Creatix PnP, ITK micro ix1 and many compatibles). HiSax is just the name of this driver, not the name of any hardware. If you have a card with such a chipset, you should say Y here and also to the configuration option of the driver for your particular card, below. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called hisax.o. See Documentation/isdn/README.HiSax for more information on using this driver. HiSax Support for EURO/DSS1 CONFIG_HISAX_EURO Enable this if you have a EURO ISDN line. Support for german chargeinfo CONFIG_DE_AOC If you have german AOC, you can enable this to get the charginfo. Disable sending complete CONFIG_HISAX_NO_SENDCOMPLETE If you have trouble with some ugly exchanges or you live in Australia select this option. Disable sending low layer compatibility CONFIG_HISAX_NO_LLC If you have trouble with some ugly exchanges try to select this option. HiSax Support for german 1TR6 CONFIG_HISAX_1TR6 Enable this if you have a old german 1TR6 line. HiSax Support for Teles 16.0/8.0 CONFIG_HISAX_16_0 This enables HiSax support for the Teles ISDN-cards S0-16.0, S0-8 and many compatibles. See Documentation/isdn/README.HiSax on how to configure it using the different cards, a different D-channel protocol, or non-standard IRQ/port/shmem settings. HiSax Support for Teles 16.3 or PNP or PCMCIA CONFIG_HISAX_16_3 This enables HiSax support for the Teles ISDN-cards S0-16.3 the Teles/Creatix PnP and the Teles PCMCIA. See Documentation/isdn/README.HiSax on how to configure it using the different cards, a different D-channel protocol, or non-standard IRQ/port settings. HiSax Support for Teles PCI CONFIG_HISAX_TELESPCI This enables HiSax support for the Teles PCI. See Documentation/isdn/README.HiSax on how to configure it. HiSax Support for Teles S0Box CONFIG_HISAX_S0BOX This enables HiSax support for the Teles/Creatix parallel port S0BOX. See Documentation/isdn/README.HiSax on how to configure it. HiSax Support for AVM A1 (Fritz) CONFIG_HISAX_AVM_A1 This enables HiSax support for the AVM A1 (aka "Fritz"). See Documentation/isdn/README.HiSax on how to configure it using the different cards, a different D-channel protocol, or non-standard IRQ/port settings. HiSax Support for AVM PnP/PCI (Fritz!PNP/PCI) CONFIG_HISAX_FRITZPCI This enables HiSax support for the AVM "Fritz!PnP" and "Fritz!PCI". See Documentation/isdn/README.HiSax on how to configure it. HiSax Support for AVM A1 PCMCIA (Fritz) CONFIG_HISAX_AVM_A1_PCMCIA This enables HiSax support for the AVM A1 "Fritz!PCMCIA"). See Documentation/isdn/README.HiSax on how to configure it. HiSax Support for Elsa cards CONFIG_HISAX_ELSA This enables HiSax support for the Elsa Mircolink ISA cards, for the Elsa Quickstep series cards and Elsa PCMCIA. See Documentation/isdn/README.HiSax on how to configure it using the different cards, a different D-channel protocol, or non-standard IRQ/port settings. HiSax Support for ITK ix1-micro Revision 2 CONFIG_HISAX_IX1MICROR2 This enables HiSax support for the ITK ix1-micro Revision 2 card. See Documentation/isdn/README.HiSax on how to configure it using the different cards, a different D-channel protocol, or non-standard IRQ/port settings. HiSax Support for Eicon.Diehl Diva cards CONFIG_HISAX_DIEHLDIVA This enables HiSax support for the Eicon.Diehl Diva none PRO versions passive ISDN cards. See Documentation/isdn/README.HiSax on how to configure it using the different cards, a different D-channel protocol, or non-standard IRQ/port settings. HiSax Support for ASUSCOM cards CONFIG_HISAX_ASUSCOM This enables HiSax support for the AsusCom and their OEM versions passive ISDN cards. See Documentation/isdn/README.HiSax on how to configure it using the different cards, a different D-channel protocol, or non-standard IRQ/port settings. HiSax Support for TELEINT cards CONFIG_HISAX_TELEINT This enables HiSax support for the TELEINT SA1 semiactiv ISDN card. See Documentation/isdn/README.HiSax on how to configure it using the different cards, a different D-channel protocol, or non-standard IRQ/port settings. HiSax Support for HFC-S based cards CONFIG_HISAX_HFCS This enables HiSax support for the HFC-S 2BDS0 based cards, like teles 16.3c. See Documentation/isdn/README.HiSax on how to configure it using the different cards, a different D-channel protocol, or non-standard IRQ/port settings. HiSax Support for Sedlbauer cards CONFIG_HISAX_SEDLBAUER This enables HiSax support for the Sedlbauer passive ISDN cards. See Documentation/isdn/README.HiSax on how to configure it using the different cards, a different D-channel protocol, or non-standard IRQ/port settings. HiSax Support for USR Sportster internal TA CONFIG_HISAX_SPORTSTER This enables HiSax support for the USR Sportster internal TA card. See Documentation/isdn/README.HiSax on how to configure it using a different D-channel protocol, or non-standard IRQ/port settings. HiSax Support for MIC card CONFIG_HISAX_MIC This enables HiSax support for the ITH MIC card. See Documentation/isdn/README.HiSax on how to configure it using a different D-channel protocol, or non-standard IRQ/port settings. HiSax Support for NETjet card CONFIG_HISAX_NETJET This enables HiSax support for the NetJet from Traverse Technologies. See Documentation/isdn/README.HiSax on how to configure it using a different D-channel protocol, or non-standard IRQ/port settings. HiSax Support for Niccy PnP/PCI card CONFIG_HISAX_NICCY This enables HiSax support for the Dr. Neuhaus Niccy PnP or PCI. See Documentation/isdn/README.HiSax on how to configure it using a different D-channel protocol, or non-standard IRQ/port settings. HiSax Support for Siemens I-Surf card CONFIG_HISAX_ISURF This enables HiSax support for the Siemens I-Talk/I-Surf card with ISAR chip. See Documentation/isdn/README.HiSax on how to configure it using a different D-channel protocol, or non-standard IRQ/port settings. HiSax Support for HST Saphir card CONFIG_HISAX_HSTSAPHIR This enables HiSax support for the HST Saphir card. See Documentation/isdn/README.HiSax on how to configure it using a different D-channel protocol, or non-standard IRQ/port settings. HiSax Support for Telekom A4T card CONFIG_HISAX_BKM_A4T This enables HiSax support for the Telekom A4T card. See Documentation/isdn/README.HiSax on how to configure it using a different D-channel protocol, or non-standard IRQ/port settings. HiSax Support for Scitel Quadro card CONFIG_HISAX_SCT_QUADRO This enables HiSax support for the Scitel Quadro card. See Documentation/isdn/README.HiSax on how to configure it using a different D-channel protocol, or non-standard IRQ/port settings. HiSax Support for Gazel cards CONFIG_HISAX_GAZEL This enables HiSax support for the Gazel cards. See Documentation/isdn/README.HiSax on how to configure it using a different D-channel protocol, or non-standard IRQ/port settings. HiSax Support for HFC PCI-Bus cards CONFIG_HISAX_HFC_PCI This enables HiSax support for the HFC-S PCI 2BDS0 based cards. For more informations see under Documentation/isdn/README.hfc-pci. HiSax Support for Winbond W6692 based cards CONFIG_HISAX_W6692 This enables HiSax support for Winbond W6692 based PCI ISDN cards. See Documentation/isdn/README.HiSax on how to configure it using a different D-channel protocol, or non-standard IRQ/port settings. HiSax Support for Am7930 (EXPERIMENTAL) CONFIG_HISAX_AMD7930 This enables HiSax support for the AMD7930 chips on some SPARCs. This code is not finished yet. PCBIT-D support CONFIG_ISDN_DRV_PCBIT This enables support for the PCBIT ISDN-card. This card is manufactured in Portugal by Octal. For running this card, additional firmware is necessary, which has to be downloaded into the card using a utility which is distributed separately. See Documentation/isdn/README and Documentation/isdn/README.pcbit for more information. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called pcbit.o. Spellcaster support (EXPERIMENTAL) CONFIG_ISDN_DRV_SC This enables support for the Spellcaster BRI ISDN boards. This driver currently builds only in a modularized version ( = code which can be inserted in and removed from the running kernel whenever you want, details in Documentation/modules.txt); the module will be called sc.o. See Documentation/isdn/README.sc and http://www.spellcast.com for more information. Eicon.Diehl active card support CONFIG_ISDN_DRV_EICON Say Y here if you have an Eicon active ISDN card. In order to use this card, additional firmware is necessary, which has to be loaded into the card using the eiconctrl utility which is part of the latest isdn4k-utils package. Please read the file Documentation/isdn/README.eicon for more information. Eicon old-type card support CONFIG_ISDN_DRV_EICON_ISA Say Y here if you have an old-type Eicon active ISDN card. In order to use this card, additional firmware is necessary, which has to be loaded into the card using the eiconctrl utility which is part of the latest isdn4k-utils package. Please read the file Documentation/isdn/README.eicon for more information. Support AT-Fax Class 2 commands CONFIG_ISDN_TTY_FAX If you say Y here, the modem-emulator will support a subset of the Fax Class 2 commands. Using a getty with fax-support (mgetty+sendfax, hylafax), you will be able to use your Linux box as an ISDN-fax-machine. This must be supported by the lowlevel driver also. See Documentation/isdn/README.fax for more information. AVM CAPI2.0 support CONFIG_ISDN_DRV_AVMB1 This enables support for the AVM B1/T1 ISDN networking cards.In addition, a CAPI (Common ISDN Application Programming Interface, a standard making it easy for programs to access ISDN hardware, see http://www.capi.org/; to browse the WWW, you need to have access to a machine on the Internet that has a program like lynx or netscape) interface for this card is provided. In order to use this card, additional firmware is necessary, which has to be downloaded into the card using a utility which is distributed separately. Please read the file Documentation/isdn/README.avmb1. This code is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called avmb1.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. AVM B1 ISA support CONFIG_ISDN_DRV_AVMB1_B1ISA Enable support for the ISA version of the AVM B1 card. AVM B1 PCI support CONFIG_ISDN_DRV_AVMB1_B1PCI Enable support for the PCI version of the AVM B1 card. AVM T1/T1-B ISA support CONFIG_ISDN_DRV_AVMB1_T1ISA Enable support for the AVM T1 T1B card. Note: This is a PRI card and handle 30 B-channels. AVM B1/M1/M2 PCMCIA support CONFIG_ISDN_DRV_AVMB1_B1PCMCIA Enable support for the PCMCIA version of the AVM B1 card. AVM T1/T1-B PCI support CONFIG_ISDN_DRV_AVMB1_T1PCI Enable support for the AVM T1 T1B card. Note: This is a PRI card and handle 30 B-channels. Verbose reason code reporting (kernel size +=7K) CONFIG_ISDN_DRV_AVMB1_VERBOSE_REASON If you say Y here, the AVM B1 driver will give verbose reasons for disconnecting. This will increase the size of the kernel by 7 KB. If unsure, say Y. IBM Active 2000 support (EXPERIMENTAL) CONFIG_ISDN_DRV_ACT2000 Say Y here if you have an IBM Active 2000 ISDN card. In order to use this card, additional firmware is necessary, which has to be loaded into the card using a utility which is part of the latest isdn4k-utils package. Please read the file Documentation/isdn/README.act2000 for more information. Support for AP1000 multicomputer CONFIG_AP1000 This enables support for a SPARC based parallel multi-computer called AP1000+. For details on our efforts to port Linux to this machine see http://cap.anu.edu.au/cap/projects/linux or mail to hackers@cafe.anu.edu.au Support for Sun4 architecture CONFIG_SUN4 Say Y here if, and only if, your machine is a Sun4. Note that a kernel compiled with this option will run only on Sun4. (And the current version will probably work only on sun4/330.) SPARC ESP SCSI support CONFIG_SCSI_SUNESP This is the driver for the Sun ESP SCSI host adapter. The ESP chipset is present in most SPARC-based computers. SPARC /dev/openprom compatibility driver (EXPERIMENTAL) CONFIG_SUN_OPENPROMIO This driver provides user programs with an interface to the SPARC PROM device tree. The driver implements a SunOS-compatible interface and a NetBSD-compatible interface. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M and read Documentation/modules.txt. If unsure, say Y. Mostek real time clock support CONFIG_SUN_MOSTEK_RTC The Mostek RTC chip is used on all knows Sun computers except some JavaStations. For a JavaStation you need to say Y both here and to "Enhanced Real Time Clock Support". Say Y here unless you are building a special purpose kernel. #Siemens SAB82532 serial support #CONFIG_SAB82532 ### ### Please someone fill these in. ### IEEE 1394 (aka FireWire) support CONFIG_IEEE1394 IEEE 1394 describes a high performance serial bus, which is also known as FireWire(tm) or i.Link(tm) and is used for connecting all sorts of devices (most notably digital video cameras). If you have FireWire hardware and want to use it, say Y here. This is the core support only, you will also need to select a driver for your IEEE 1394 adapter. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called ieee1394.o. FireWire is a trademark by Apple Inc. and i.Link is a trademark by Sony. TI PCILynx IEEE 1394 support CONFIG_IEEE1394_PCILYNX Say Y here if you have a IEEE-1394 controller with the Texas Instruments PCILynx chip. Note: this driver is written for revision 2 of this chip and may not work with revision 0. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called pcilynx.o. Use local RAM on PCILynx board CONFIG_IEEE1394_PCILYNX_LOCALRAM This option makes the PCILynx driver use local RAM available on some PCILynx setups for Packet Control Lists. Local RAM may speed up command processing because no PCI transfers are necessary during use of the Packet Control Lists. Note that there are no known PCILynx systems providing local RAM except for the evaluation boards by Texas Instruments and that the PCILynx does not reliably report missing RAM. Unless you are absolutely sure that you have 64kB of local RAM and that you want to use it or if you don't know what this is all about, say N here. Adaptec AIC-5800 IEEE 1394 support CONFIG_IEEE1394_AIC5800 Say Y here if you have a IEEE 1394 controller using the Adaptec AIC-5800 chip. All Adaptec host adapters (89xx series) use this chip, as well as miro's DV boards. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called aic5800.o. OHCI (Open Host Controller Interface) support CONFIG_IEEE1394_OHCI1394 Say Y here if you have a IEEE 1394 controller based on OHCI. The current driver was only tested with OHCI chipsets made by Texas Instruments. However, most third-party vendors use TI chips. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called ohci1394.o. RAW IEEE 1394 I/O support CONFIG_IEEE1394_RAWIO Say Y here if you want support for the raw device. This is generally a good idea, so you should say Y here. The raw device enables direct communication of user programs to the IEEE 1394 bus. If you want to compile this as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called raw1394.o. # # m68k-specific kernel options # Documented by Chris Lawrence et al. # Amiga support CONFIG_AMIGA This option enables support for the Amiga series of computers. If you plan to use this kernel on an Amiga, say Y here and browse the material available in Documentation/m68k; otherwise say N. Atari support CONFIG_ATARI This option enables support for the 68000-based Atari series of computers (including the TT, Falcon and Medusa). If you plan to use this kernel on an Atari, say Y here and browse the material available in Documentation/m68k; otherwise say N. Hades support CONFIG_HADES This option enables support for the Hades Atari clone. If you plan to use this kernel on a Hades, say Y here; otherwise say N. Macintosh support CONFIG_MAC This option enables support for the Apple Macintosh series of computers (yes, there is experimental support now, at least for part of the series). Say N unless you're willing to code the remaining necessary support. ;) HP9000/300 support CONFIG_HP300 This option enables support for the HP9000/300 series of workstations. Support for these machines is still very experimental. If you plan to try to use the kernel on such a machine say Y here. Everybody else says N. Sun 3 support CONFIG_SUN3 This option enables support for the Sun 3 series of workstations. Be warned that this support is very experimental. You will also want to say Y to 68020 support and N to the other processors below. Currently, it is not possible to build a kernel with support for the Sun 3 and something else, so make sure you have said N to all the other machines. This option does not support the sun3x series of machines (the Sun 3/80 and 3/460). If you don't want to compile a kernel for a Sun 3, say N. 68020 support CONFIG_M68020 If you anticipate running this kernel on a computer with a MC68020 processor, say Y. Otherwise, say N. Note that the 68020 requires a 68851 MMU (Memory Management Unit) to run Linux/m68k, except on the Sun 3, which provides its own version. 68030 support CONFIG_M68030 If you anticipate running this kernel on a computer with a MC68030 processor, say Y. Otherwise, say N. Note that a MC68EC030 will not work, as it does not include an MMU (Memory Management Unit). 68040 support CONFIG_M68040 If you anticipate running this kernel on a computer with a MC68LC040 or MC68040 processor, say Y. Otherwise, say N. Note that an MC68EC040 will not work, as it does not include an MMU (Memory Management Unit). 68060 support CONFIG_M68060 If you anticipate running this kernel on a computer with a MC68060 processor, say Y. Otherwise, say N. Math emulation support (EXPERIMENTAL) CONFIG_M68KFPU_EMU At some point in the future, this will cause floating-point math instructions to be emulated by the kernel on machines that lack a floating-point math coprocessor. Thrill-seekers and chronically sleep-deprived psychotic hacker types can say Y now, everyone else should probably wait a while. Math emulation only kernel CONFIG_M68KFPU_EMU_ONLY This option prevents any floating-point instructions from being compiled into the kernel, thereby the kernel doesn't save any floating point context anymore during task switches, so this kernel will only be usable on machines without a floating-point math coprocessor. This makes the kernel a bit faster as no tests needs to be executed whether a floating-point instruction in the kernel should be executed or not. Math emulation extra precision CONFIG_M68KFPU_EMU_EXTRAPREC The fpu uses normally a few bit more during calculations for correct rounding, the emulator can (often) do the same but this extra calculation can cost quite some time, so you can disable it here. The emulator will then "only" calculate with a 64 bit mantissa and round slightly incorrect, what is more then enough for normal usage. Advanced processor options CONFIG_ADVANCED_CPU This gives you access to some advanced options for the CPU. The defaults should be fine for most users, but these options may make it possible for you to improve performance somewhat if you know what you are doing. Most users should say N to this question. Use read-modify-write instructions CONFIG_RMW_INSNS This allows to use certain instructions that work with indivisible read-modify-write bus cycles. While this is faster than the workaround of disabling interrupts, it can conflict with DMA ( = direct memory access) on many Amiga systems, and it is also said to destabilize other machines. It is very likely that this will cause serious problems on any Amiga or Atari Medusa if set. The only configuration where it should work are 68030-based Ataris, where it apparently improves performance. But you've been warned! Unless you really know what you are doing, say N. Try Y only if you're quite adventurous. Amiga AutoConfig Identification CONFIG_ZORRO This enables support for automatic identification of Amiga expansion cards that obey the AutoConfig(tm) specification. Say Y if you want your expansion cards to be identified on bootup; it will enlarge your kernel by about 10 KB. The identification information is also available through /proc/zorro (say Y to "/proc filesystem support"!). Note that even if you say N here, you can still use your expansion cards. If in doubt, say Y. Amiga 1200/600 PCMCIA support (EXPERIMENTAL) CONFIG_AMIGA_PCMCIA Include support in the kernel for pcmcia on Amiga 1200 and Amiga 600. If you intend to use pcmcia cards say Y; otherwise say N. Amiga GSP (TMS340x0) support CONFIG_AMIGA_GSP Include support for Amiga graphics cards that use the Texas Instruments TMS340x0 GSP (Graphics Signal Processor) chips. Say Y if you want to use a DMI Resolver or Commodore A2410 (Lowell) graphics card on an Amiga; otherwise, say N. DMI Resolver support CONFIG_GSP_RESOLVER Include support in the kernel for the DMI Resolver graphics card. If you have one, say Y; otherwise, say N. A2410 support CONFIG_GSP_A2410 Include support in the kernel for the Commodore/University of Lowell A2410 graphics card. If you have one, say Y; otherwise, say N. Amiga Zorro II ramdisk support CONFIG_AMIGA_Z2RAM This enables support for using Chip RAM and Zorro II RAM as a ramdisk or as a swap partition. Say Y if you want to include this driver in the kernel. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module is called z2ram.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Atari ST-RAM swap support CONFIG_STRAM_SWAP This enables support for using (parts of) ST-RAM as swap space, instead of as normal system memory. This can first enhance system performance if you have lots of alternate RAM (compared to the size of ST-RAM), because executable code always will reside in faster memory. ST-RAM will remain as ultra-fast swap space. On the other hand, it allows much improved dynamic allocations of ST-RAM buffers for device driver modules (e.g. floppy, ACSI, SLM printer, DMA sound). The probability that such allocations at module load time fail is drastically reduced. Atari ACSI support CONFIG_ATARI_ACSI This enables support for the Atari ACSI interface. The driver supports hard disks and CD-ROMs, which have 512-byte sectors, or can be switched to that mode. Due to the ACSI command format, only disks up to 1 GB are supported. Special support for certain ACSI to SCSI adapters, which could relax that, isn't included yet. The ACSI driver is also the basis for certain other drivers for devices attached to the ACSI bus: Atari SLM laser printer, BioNet-100 Ethernet, and PAMsNet Ethernet. If you want to use one of these devices, you need ACSI support, too. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called acsi.o. Probe all LUNs on each ACSI device CONFIG_ACSI_MULTI_LUN If you have a ACSI device that supports more than one LUN (Logical Unit Number), e.g. a CD jukebox, you should say Y here so that all will be found by the ACSI driver. An ACSI device with multiple LUNs acts logically like multiple ACSI devices. The vast majority of ACSI devices have only one LUN, and so most people can say N here and should in fact do so, because it is safer. Atari SLM laser printer support CONFIG_ATARI_SLM If you have an Atari SLM laser printer, say Y to include support for it in the kernel. Otherwise, say N. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called acsi_slm.o. Be warned: the driver needs much ST-RAM and can cause problems due to that fact! A3000 WD33C93A support CONFIG_A3000_SCSI If you have an Amiga 3000 and have SCSI devices connected to the built-in SCSI controller, say Y. Otherwise, say N. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module is called wd33c93.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. A2091 WD33C93A support CONFIG_A2091_SCSI If you have a Commodore A2091 SCSI controller, say Y. Otherwise, say N. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module is called wd33c93.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. GVP Series II WD33C93A support CONFIG_GVP11_SCSI If you have a Great Valley Products Series II SCSI controller, answer Y. Also say Y if you have a later model of GVP SCSI controller (such as the GVP A4008 or a Combo board). Otherwise, answer N. This driver does NOT work for the T-Rex series of accelerators from TekMagic and GVP-M. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called gvp11.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Cyberstorm SCSI support CONFIG_CYBERSTORM_SCSI If you have an Amiga with an original (MkI) Phase5 Cyberstorm accelerator board and the optional Cyberstorm SCSI controller, answer Y. Otherwise, say N. Cyberstorm II SCSI support CONFIG_CYBERSTORMII_SCSI If you have an Amiga with a Phase5 Cyberstorm MkII accelerator board and the optional Cyberstorm SCSI controller, say Y. Otherwise, answer N. Blizzard 2060 SCSI support CONFIG_BLZ2060_SCSI If you have an Amiga with a Phase5 Blizzard 2060 accelerator board and want to use the onboard SCSI controller, say Y. Otherwise, answer N. Blizzard 1230IV/1260 SCSI support CONFIG_BLZ1230_SCSI If you have an Amiga 1200 with a Phase5 Blizzard 1230IV or Blizzard 1260 accelerator, and the optional SCSI module, say Y. Otherwise, say N. Blizzard PowerUP 603e+ SCSI support (EXPERIMENTAL) CONFIG_BLZ603EPLUS_SCSI If you have an Amiga 1200 with a Phase5 Blizzard PowerUP 603e+ accelerator, say Y. Otherwise, say N. Fastlane SCSI support CONFIG_FASTLANE_SCSI If you have the Phase5 Fastlane Z3 SCSI controller, or plan to use one in the near future, say Y to this question. Otherwise, say N. Atari native SCSI support CONFIG_ATARI_SCSI If you have an Atari with built-in NCR5380 SCSI controller (TT, Falcon, ...) say Y to get it supported. Of course also, if you have a compatible SCSI controller (e.g. for Medusa). This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module is called atari_scsi.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. This driver supports both styles of NCR integration into the system: the TT style (separate DMA), and the Falcon style (via ST-DMA, replacing ACSI). It does NOT support other schemes, like in the Hades (without DMA). Long delays for Toshiba CD-ROMs CONFIG_ATARI_SCSI_TOSHIBA_DELAY This option increases the delay after a SCSI arbitration to accommodate some flaky Toshiba CD-ROM drives. Say Y if you intend to use a Toshiba CD-ROM drive; otherwise, the option is not needed and would impact performance a bit, so say N. Hades SCSI DMA emulator (EXPERIMENTAL) CONFIG_TT_DMA_EMUL This option enables code which emulates the TT SCSI DMA chip on the Hades. This increases the SCSI transfer rates at least ten times compared to PIO transfers. Note that this code is experimental and has only been tested on a Hades with a 68060 processor. Before you use this, make backups of your entire hard disk. Ariadne support CONFIG_ARIADNE If you have a Village Tronic Ariadne Ethernet adapter, say Y. Otherwise, say N. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module is called ariadne.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Ariadne II support CONFIG_ARIADNE2 If you have a Village Tronic Ariadne II Ethernet adapter, say Y. Otherwise, say N. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module is called ariadne2.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. A2065 support CONFIG_A2065 If you have a Commodore A2065 Ethernet adapter, say Y. Otherwise, say N. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module is called a2065.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Hydra support CONFIG_HYDRA If you have a Hydra Ethernet adapter, say Y. Otherwise, say N. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module is called hydra.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Pcmcia NE2000 compatible support CONFIG_APNE If you have a pcmcia ne2000 compatible adapter, say Y. Otherwise, say N. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module is called apne.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Atari Lance support CONFIG_ATARILANCE Say Y to include support for several Atari Ethernet adapters based on the AMD Lance chipset: RieblCard (with or without battery), or PAMCard VME (also the version by Rhotron, with different addresses). BioNet-100 support CONFIG_ATARI_BIONET Say Y to include support for BioData's BioNet-100 Ethernet adapter for the ACSI port. The driver works (has to work...) with a polled I/O scheme, so it's rather slow :-( PAMsNet support CONFIG_ATARI_PAMSNET Say Y to include support for the PAMsNet Ethernet adapter for the ACSI port ("ACSI node"). The driver works (has to work...) with a polled I/O scheme, so it's rather slow :-( Multiface Card III parallel support CONFIG_MULTIFACE_III_LP If you have a Multiface III card for your Amiga, and want to use its parallel port in Linux, say Y. Otherwise, say N. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module is called lp_m68k.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Amiga mouse support CONFIG_AMIGAMOUSE If you want to be able to use an Amiga mouse in Linux, say Y. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module is called amigamouse.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Amiga Copper Console CONFIG_COPCON This configures the console to use the Amiga's graphics coprocessor for scrolling, instead of using the CPU. This option markedly improves response times in the high color modes (5 bitplanes and up). If you would like to use this, say Y; otherwise, say N. Atari mouse support CONFIG_ATARIMOUSE If you want to be able to use an Atari mouse in Linux, say Y. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module is called atarimouse.o. If you want to compile it as a module, say M here and read Documentation/modules.txt. Atari MFP serial support CONFIG_ATARI_MFPSER If you like to use the MFP serial ports ("Modem1", "Serial1") under Linux, say Y. The driver equally supports all kinds of MFP serial ports and automatically detects whether Serial1 is available. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. Note for Falcon users: You also have an MFP port, it's just not wired to the outside... But you could use the port under Linux. Atari SCC serial support CONFIG_ATARI_SCC If you have serial ports based on a Zilog SCC chip (Modem2, Serial2, LAN) and like to use them under Linux, say Y. All built-in SCC's are supported (TT, MegaSTE, Falcon), and also the ST-ESCC. If you have two connectors for channel A (Serial2 and LAN), they are visible as two separate devices. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. Atari SCC serial DMA support CONFIG_ATARI_SCC_DMA This enables DMA support for receiving data on channel A of the SCC. If you have a TT you may say Y here and read drivers/char/atari_SCC.README. All other users should say N here, because only the TT has SCC-DMA, even if your machine keeps claiming so at boot time. Atari MIDI serial support CONFIG_ATARI_MIDI If you want to use your Atari's MIDI port in Linux, say Y. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. Atari DSP56k Digital Signal Processor support (EXPERIMENTAL) CONFIG_ATARI_DSP56K If you want to be able to use the DSP56001 in Falcons, say Y. This driver is still experimental, and if you don't know what it is, or if you don't have this processor, just say N. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. Amiga builtin serial support CONFIG_AMIGA_BUILTIN_SERIAL If you want to use your Amiga's built-in serial port in Linux, answer Y. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. GVP IO-Extender support CONFIG_GVPIOEXT If you want to use a GVP IO-Extender serial card in Linux, say Y. Otherwise, say N. Multiface Card III serial support CONFIG_MULTIFACE_III_TTY If you want to use a Multiface III card's serial port in Linux, answer Y. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. Amiga or Atari DMA sound support CONFIG_DMASOUND If you want to use the internal audio of your Atari or Amiga in Linux, answer Y to this question. This will provide a Sun-like /dev/audio, compatible with the Linux/i386 sound system. Otherwise, say N. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. HP DCA serial support CONFIG_HPDCA If you want to use the internal "DCA" serial ports on an HP300 machine, say Y here. HP on-board LANCE support CONFIG_HPLANCE If you want to use the builtin "LANCE" Ethernet controller on an HP300 machine, say Y here. Sun 3 onboard LANCE support CONFIG_SUN3LANCE If you want to use the onboard AMD "LANCE" (le) Ethernet hardware on a Sun 3, you will need to say Y here. DIO bus support CONFIG_DIO Say Y here to enable support for the "DIO" expansion bus used in HP300 machines. If you are using such a system you almost certainly want this. Processor Type CONFIG_6xx There are three types of PowerPC chips supported. The more common types (601, 603, 604, 740, 750), the Motorola embedded versions (821, 823, 850, 855, 860), and the IBM embedded versions (403 and 405). Unless you are building a kernel for one of the embedded processor systems, choose 6xx. Machine Type CONFIG_PMAC Linux currently supports several different kinds of PowerPC-based machines: Apple Power Macintoshes and clones (such as the Motorola Starmax series), PReP (PowerPC Reference Platform) machines such as the Motorola PowerStack, Amiga Power-Up systems (APUS), CHRP and the embedded MBX boards from Motorola. Currently, a single kernel binary only supports one type or the other. However, there is very early work on support for CHRP, PReP and PowerMac's from a single binary. Support for Open Firmware device tree in /proc CONFIG_PROC_DEVICETREE This option adds a device-tree directory under /proc which contains an image of the device tree that the kernel copies from Open Firmware. If unsure, say Y here. MESH (Power Mac internal SCSI) support CONFIG_SCSI_MESH Many Power Macintoshes and clones have a MESH (Macintosh Enhanced SCSI Hardware) SCSI bus adaptor (the 7200 doesn't, but all of the other Power Macintoshes do). Say Y to include support for this SCSI adaptor. This driver is also available as a module called mesh.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. Maximum synchronous transfer rate CONFIG_SCSI_MESH_SYNC_RATE On Power Macintoshes (and clones) where the MESH SCSI bus adaptor drives a bus which is entirely internal to the machine (such as the 7500, 7600, 8500, etc.), the MESH is capable of synchronous operation at up to 10 MB/s. On machines where the SCSI bus controlled by the MESH can have external devices connected, it is usually rated at 5 MB/s. 5 is a safe value here unless you know the MESH SCSI bus is internal only; in that case you can say 10. Say 0 to disable synchronous operation. 53C94 (Power Mac external SCSI) support CONFIG_SCSI_MAC53C94 On Power Macintoshes (and clones) with two SCSI buses, the external SCSI bus is usually controlled by a 53C94 SCSI bus adaptor. Older machines which only have one SCSI bus, such as the 7200, also use the 53C94. Say Y to include support for the 53C94. This driver is also available as a module called mac53c94.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. MACE (Power Mac Ethernet) support CONFIG_MACE Power Macintoshes and clones with Ethernet built-in on the motherboard will usually use a MACE (Medium Access Control for Ethernet) interface. Say Y to include support for the MACE chip. This driver is also available as a module called mace.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. BMAC (G3 ethernet) support CONFIG_BMAC Say Y for support of BMAC Ethernet interfaces. These are used on G3 computers. This driver is also available as a module called bmac.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. Video For Linux CONFIG_VIDEO_DEV Support for audio/video capture and overlay devices and FM radio cards. The exact capabilities of each device vary. User tools for this are available from ftp://ftp.uk.linux.org/pub/linux/video4linux . If you are interested in writing a driver for such an audio/video device or user software interacting with such a driver, please read the file Documentation/video4linux/API.html. This driver is also available as a module called videodev.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. AIMSlab RadioTrack (aka RadioReveal) support CONFIG_RADIO_RTRACK Choose Y here if you have one of these FM radio cards, and then fill in the port address below. Note that newer AIMSlab RadioTrack cards have a different chipset and are not supported by this driver. For these cards, use the RadioTrack II driver below. If you have a GemTeks combined (PnP) sound- and radio card you must use this driver as a module and setup the card with isapnptools. You must also pass the module a suitable io parameter, 0x248 has been reported to be used by these cards. In order to control your radio card, you will need to use programs that are compatible with the Video for Linux API. Information on this API and pointers to "v4l" programs may be found on the WWW at http://roadrunner.swansea.uk.linux.org/v4l.shtml . More information is contained in the file Documentation/video4linux/radiotrack.txt. If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called radio-aimslab.o. RadioTrack i/o port CONFIG_RADIO_RTRACK_PORT Enter either 0x30f or 0x20f here. The card default is 0x30f, if you haven't changed the jumper setting on the card. AIMSlab RadioTrack II support CONFIG_RADIO_RTRACK2 Choose Y here if you have this FM radio card, and then fill in the port address below. In order to control your radio card, you will need to use programs that are compatible with the Video for Linux API. Information on this API and pointers to "v4l" programs may be found on the WWW at http://roadrunner.swansea.uk.linux.org/v4l.shtml . If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called radio-rtrack2.o. RadioTrack II i/o port CONFIG_RADIO_RTRACK2_PORT Enter either 0x30c or 0x20c here. The card default is 0x30c, if you haven't changed the jumper setting on the card. Aztech/Packard Bell Radio CONFIG_RADIO_AZTECH Choose Y here if you have one of these FM radio cards, and then fill in the port address below. In order to control your radio card, you will need to use programs that are compatible with the Video for Linux API. Information on this API and pointers to "v4l" programs may be found on the WWW at http://roadrunner.swansea.uk.linux.org/v4l.shtml . If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called radio-aztech.o. Aztech/Packard Bell radio card i/o port CONFIG_RADIO_AZTECH_PORT Enter either 0x350 or 0x358 here. The card default is 0x350, if you haven't changed the setting of jumper JP3 on the card. Removing the jumper sets the card to 0x358. ADS Cadet AM/FM Radio Tuner Card CONFIG_RADIO_CADET Choose Y here if you have one of these AM/FM radio cards, and then fill in the port address below. In order to control your radio card, you will need to use programs that are compatible with the Video for Linux API. Information on this API and pointers to "v4l" programs may be found on the WWW at http://roadrunner.swansea.uk.linux.org/v4l.shtml . Further documentation on this driver can be found on the WWW at http://linux.blackhawke.net/cadet.html . If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called radio-cadet.o. ADS Cadet AM/FM Radio Tuner Card I/O Port CONFIG_RADIO_CADET_PORT Enter the I/O address of the card here (most commonly 330). SF16FMI Radio CONFIG_RADIO_SF16FMI Choose Y here if you have one of these FM radio cards, and then fill in the port address below. In order to control your radio card, you will need to use programs that are compatible with the Video for Linux API. Information on this API and pointers to "v4l" programs may be found on the WWW at http://roadrunner.swansea.uk.linux.org/v4l.shtml . If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called radio-sf16fmi.o SF16FMI I/O port (0x284 or 0x384) CONFIG_RADIO_SF16FMI_PORT Enter the I/O port of your SF16FMI radio card. Typhoon Radio CONFIG_RADIO_TYPHOON Choose Y here if you have one of these FM radio cards, and then fill in the port address and the frequency used for muting below. In order to control your radio card, you will need to use programs that are compatible with the Video for Linux API. Information on this API and pointers to "v4l" programs may be found on the WWW at http://roadrunner.swansea.uk.linux.org/v4l.shtml . If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called radio-typhoon.o Support for /proc/radio-typhoon CONFIG_RADIO_TYPHOON_PROC_FS Say Y here if you want the typhoon radio card driver to write status information (frequency, volume, muted, mute frequency, base address) to /proc/radio-typhoon. The file can be viewed with your favorite pager (i.e. use "more /proc/radio-typhoon" or "less /proc/radio-typhoon" or simply "cat /proc/radio-typhoon"). Typhoon I/O port (0x316 or 0x336) CONFIG_RADIO_TYPHOON_PORT Enter the I/O port of your Typhoon or EcoRadio radio card. Typhoon frequency set when muting the device (kHz) CONFIG_RADIO_TYPHOON_MUTEFREQ Enter the frequency used for muting the radio. The device is never completely silent. If the volume is just turned down, you can still hear silent voices and music. For that reason, the frequency of the radio device is set to the frequency you can enter here whenever the device is muted. There should be no local radio station at that frequency. Zoltrix Radio CONFIG_RADIO_ZOLTRIX Choose Y here if you have one of these FM radio cards, and then fill in the port address below. In order to control your radio card, you will need to use programs that are compatible with the Video for Linux API. Information on this API and pointers to "v4l" programs may be found on the WWW at http://roadrunner.swansea.uk.linux.org/v4l.shtml; to browse the WWW, you need to have access to a machine on the Internet that has a program like lynx or netscape. If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called radio-zoltrix.o ZOLTRIX I/O port (0x20c or 0x30c) CONFIG_RADIO_ZOLTRIX_PORT Enter the I/O port of your Zoltrix radio card. IIC on parallel port CONFIG_I2C_PARPORT I2C is a simple serial bus system used in many micro controller applications. Saying Y here will allow you to use your parallel port as an I2C interface. If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called i2c-parport.o. Miro PCM20 Radio CONFIG_RADIO_MIROPCM20 Choose Y here if you have this FM radio card. You also need to say Y to "ACI mixer (miroPCM12/PCM20)" (in "additional low level sound drivers") for this to work. In order to control your radio card, you will need to use programs that are compatible with the Video for Linux API. Information on this API and pointers to "v4l" programs may be found on the WWW at http://roadrunner.swansea.uk.linux.org/v4l.shtml . If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called radio-miropcm20.o GemTek Radio Card CONFIG_RADIO_GEMTEK Choose Y here if you have this FM radio card, and then fill in the port address below. In order to control your radio card, you will need to use programs that are compatible with the Video for Linux API. Information on this API and pointers to "v4l" programs may be found on the WWW at http://roadrunner.swansea.uk.linux.org/v4l.shtml; to browse the WWW, you need to have access to a machine on the Internet that has a program like lynx or netscape. If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called radio-gemtek.o. GemTek i/o port CONFIG_RADIO_GEMTEK_PORT Enter either 0x20c, 0x30c, 0x24c or 0x34c here. The card default is 0x34c, if you haven't changed the jumper setting on the card. PlanB Video-In for PowerMacs CONFIG_VIDEO_PLANB PlanB is the V4L driver for the PowerMac 7x00/8x00 series video input hardware. If you want to experiment with this, say Y. Otherwise, or if you don't understand a word, say N. See http://www.cpu.lu/~mlan/planb.html for more info. Saying M will compile this driver as a module (planb.o). TerraTec ActiveRadio CONFIG_RADIO_TERRATEC Choose Y here if you have this FM radio card, and then fill in the port address below. (TODO) Note: This driver is in its early stages. Right now volume and frequency control and muting works at least for me, but unfortunately i have not found anybody who wants to use this card with linux. So if it is this what YOU are trying to do right now, PLEASE DROP ME A NOTE!! Rolf Offermanns (rolf@offermanns.de) In order to control your radio card, you will need to use programs that are compatible with the Video for Linux API. Information on this API and pointers to "v4l" programs may be found on the WWW at http://roadrunner.swansea.uk.linux.org/v4l.shtml; to browse the WWW, you need to have access to a machine on the Internet that has a program like lynx or netscape. If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read Documentation/modules.txt. The module will be called radio-terratec.o. # Zoran ZR36057/36060 support # CONFIG_VIDEO_ZORAN # Include support for Iomega Buz # CONFIG_VIDEO_BUZ BT848 Video For Linux CONFIG_VIDEO_BT848 Support for BT848 based frame grabber/overlay boards. This includes the Miro, Hauppauge and STB boards. Please read the material in Documentation/video4linux/bttv for more information. This driver is also available as a module called bttv.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. ZR36120/36125 Video for Linux CONFIG_VIDEO_ZR36120 Support for ZR36120/ZR36125 based frame grabber/overlay boards. This includes the Victor II, WaveWatcher, Video Wonder, Maxi-TV, and Buster boards. Please read the material in Documentation/video4linux/zr36120.txt for more information. This driver is also available as a module called zr36120.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. SAA5249 Teletext processor CONFIG_VIDEO_SAA5249 Support for I2C bus based teletext using the SAA5249 chip. At the moment this is only useful on some European WinTV cards. This driver is also available as a module called saa5249.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. Quickcam BW Video For Linux CONFIG_VIDEO_BWQCAM Say Y have if you the black and white version of the QuickCam camera. See the next option for the color version. This driver is also available as a module called bw-qcam.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. Colour QuickCam Video For Linux CONFIG_VIDEO_CQCAM This is the video4linux driver for the colour version of the Connectix Quickcam. If you have one of these cameras, say Y here, otherwise say N. This driver does not work with the original monochrome Quickcam, Quickcam VC or QuickClip. It is also available as a module (c-qcam.o). Mediavision Pro Movie Studio Video For Linux CONFIG_VIDEO_PMS Say Y if you have such a thing. This driver is also available as a module called pms.o ( = code which can be inserted in and removed from the running kernel whenever you want). If you want to compile it as a module, say M here and read Documentation/modules.txt. Compaq SMART2 support CONFIG_BLK_CPQ_DA This is the driver for Compaq Smart Array controllers. Everyone using these boards should say Y here. See the file Documentation/cpqarray.txt for the current list of boards supported by this driver, and for further information on the use of this driver. QuickNet Internet LineJack/PhoneJack support CONFIG_PHONE_IXJ Say M if you have a telephony card manufactured by Quicknet Technologies, Inc. These include the Internet PhoneJACK and Internet LineJACK Telephony Cards. For the ISA versions of these products, you can configure the cards using the isapnp tools (pnpdump/isapnp) or you can use the isapnp support. Please read: /usr/src/linux/Documentation/telephony/ixj.txt. For more information on these cards, see Quicknet's website at: http://www.quicknet.net/ If you do not have any Quicknet telephony cards, you can safely ignore this option. # # ARM options # CPU Optimization CONFIG_CPU_ARM2 This selects the processor type of your CPU. This is only used to determine C compiler optimization options, and can affect the compatibility of the kernel on other processors. If you specify ARM6, the kernel should work on all 32-bit processors. If you specify ARM2, ARM250 or ARM3, it should work on all 26-bit processors. If you're not sure, set it to "None". ARM System type CONFIG_ARCH_ARC This selects what ARM system you wish to build the kernel for. It also selects to some extent the CPU type. If you are unsure what to set this option to, please consult any information supplied with your system. Include support for Chalice CATS boards CONFIG_CATS Say Y here if you intend to run this kernel on a CATS system. Include support for Intel EBSA285 CONFIG_ARCH_EBSA285 board. Include support for the NetWinder CONFIG_ARCH_NETWINDER Say Y here if you intend to run this kernel on the NetWinder. Virtual/Physical Memory Split CONFIG_1GB If you are compiling a kernel which will never run on a machine with more than 1 Gigabyte total physical RAM, answer "3GB/1GB" here (default choice). On 32-bit x86 systems Linux can use up to 64 Gigabytes of physical memory. However 32-bit x86 processors have only 4 Gigabytes of virtual memory space. This option specifies the maximum amount of virtual memory space one process can potentially use. Certain types of applications (eg. database servers) perform better if they have as much virtual memory per process as possible. The remaining part of the 4G virtual memory space is used by the kernel to 'permanently map' as much physical memory as possible. Certain types of applications perform better if there is more 'permanently mapped' kernel memory. [WARNING! Certain boards do not support PCI DMA to physical addresses bigger than 2 Gigabytes. Non-DMA-able memory must not be permanently mapped by the kernel, thus a 1G/3G split will not work on such boxes.] As you can see there is no 'perfect split' - the fundamental problem is that 4G of 32-bit virtual memory space is short. So you'll have to pick your own choice - depending on the application load of your box. A 2G/2G split is typically a good choice for a generic Linux server with lots of RAM. Any potentially remaining (not permanently mapped) part of physical memory is called 'high memory'. How much total high memory the kernel can handle is influenced by the (next) High Memory configuration option. The actual amount of total physical memory will either be autodetected or can be forced by using a kernel command line option such as "mem=256M". (Try "man bootparam" or see the documentation of your boot loader (lilo or loadlin) about how to pass options to the kernel at boot time. The lilo procedure is also explained in the SCSI-HOWTO, available from http://www.linuxdoc.org/docs.html#howto .) Math emulation CONFIG_NWFPE Say Y to include the NWFPE floating point emulator in the kernel. This is necessary to run most binaries. Linux does not currently support floating point hardware so you need to say Y here even if your machine has an FPA or floating point co-processor podule. It is also possible to say M to build the emulator as a module (nwfpe.o) or indeed to leave it out altogether. However, unless you know what you are doing this can easily render your machine unbootable. Saying Y is the safe option. You may say N here if you are going to load the Acorn FPEmulator early in the bootup. DS1620 Thermometer support CONFIG_DS1620 Say Y here to include support for the thermal management hardware found in the NetWinder. This driver allows the user to control the temperature set points and to read the current temperature. It is also possible to say M here to build it as a module (ds1620.o) It is recommended to be used on a NetWinder, but it is not a necessity. Verbose kernel error messages CONFIG_DEBUG_ERRORS This option controls verbose debugging information which can be printed when the kernel detects an internal error. This debugging information is useful to kernel hackers when tracking down problems, but mostly meaningless to other people. It's safe to say Y unless you are concerned with the code size or don't want to see these messages. Build Tools Selection CONFIG_BINUTILS_NEW Say Y here if and only if you're using GCC 2.8.1/EGCS with a binutils version >= 2.8.1 to compile the kernel (check with "gcc --version" and "ld -v"). Compile kernel with frame pointer CONFIG_FRAME_POINTER If you say Y here, the resulting kernel will be slightly larger and slower, but it will give useful debugging information. If you don't debug the kernel, you can say N. User fault debugging CONFIG_DEBUG_USER When a user program crashes due to an exception, the kernel can print a brief message explaining what the problem was. This is sometimes helpful for debugging but serves no purpose on a production system. Most people should say N here. Include gdb debugging information in kernel binary CONFIG_DEBUG_INFO Say Y here to include source-level debugging information in the `vmlinux' binary image. This is handy if you want to use gdb or addr2line to debug the kernel. It has no impact on the in-memory footprint of the running kernel but it can increase the amount of time and disk space needed for compilation of the kernel. If in doubt say N. Split initialisation functions into discardable section CONFIG_TEXT_SECTIONS If you say Y here, kernel code that is only used during initialisation is collected into a special area of the kernel so that it can be discarded and the memory reclaimed when initialisation is complete. In addition, if the kernel you wish to build is able to run on multiple architectures, it allows the unused code to be discarded. Some versions of binutils, however, have a bug that causes the kernel to crash during startup when this option is enabled. Say Y unless you experience problems that you suspect may be caused by this. Disable pgtable cache (EXPERIMENTAL) CONFIG_NO_PGT_CACHE Normally the kernel maintains a `quicklist' of preallocated pagetable structures in order to increase performance. On machines with very few pages this may however be a loss. Say Y here to disable the pgtable cache. RISC OS personality CONFIG_ARTHUR Say Y here to include the kernel code necessary if you want to run Acorn RISC OS/Arthur binaries under Linux. This code is still very experimental; if this sounds frightening, say N and sleep in peace. You can also say M here to compile this support as a module (which will be called arthur.o). Initial kernel command line CONFIG_CMDLINE On some architectures (EBSA110 and CATS), there is currently no way for the boot loader to pass arguments to the kernel. For these architectures, you should supply some command-line options at build time by entering them here. As a minimum, you should specify the memory size and the root device (e.g., mem=64M root=/dev/nfs) Hardware alignment trap (EXPERIMENTAL) CONFIG_ALIGNMENT_TRAP ARM processors can not fetch/store information which is not naturally aligned on the bus, i.e., a 4 byte fetch must start at an address divisible by 4. On 32-bit ARM processors, these non-aligned fetch/store instructions will be emulated in software if you say here, which has a severe performance impact. This is necessary for correct operation of some network protocols. With an IP-only configuration it is safe to say N, otherwise say Y. 21285 serial port support CONFIG_SERIAL_21285 If you have a machine based on a 21285 (Footbridge) StrongARM/PCI bridge you can enable its onboard serial port by enabling this option. The device has major ID 4, minor 64. Console on 21285 serial port CONFIG_SERIAL_21285_CONSOLE If you have enabled the serial port on the 21285 footbridge you can make it the console by answering Y to this option. Footbridge Mode CONFIG_HOST_FOOTBRIDGE The 21285 Footbridge chip can operate in either `host mode' or `add-in' mode. Say Y if your 21285 is in host mode, and therefore is the configuration master, otherwise say N. This must not be set to Y if the card is used in 'add-in' mode. MFM hard disk support CONFIG_BLK_DEV_MFM Support the MFM hard drives on the Acorn Archimedes both on-board the A4x0 motherboards and via the Acorn MFM podules. Drives up to 64MB are supported. If you haven't got one of these machines or drives just say N. Old Archimedes floppy (1772) support CONFIG_BLK_DEV_FD1772 Support the floppy drive on the Acorn Archimedes (A300, A4x0, A540, R140 and R260) series of computers; it supports only 720K floppies at the moment. If you don't have one of these machines just answer N. Autodetect hard drive geometry CONFIG_BLK_DEV_MFM_AUTODETECT If you answer Y, the MFM code will attempt to automatically detect the cylinders/heads/sectors count on your hard drive. WARNING: This sometimes doesn't work and it also does some dodgy stuff which potentially might damage your drive. IrDA Protocols CONFIG_IRDA Say Y here if you want to build support for the IrDA (TM) protocols. The Infrared Data Associations (tm) specifies standards for wireless infrared communication and is supported by most laptops and PDA's. To use Linux support for the IrDA (tm) protocols, you will also need some user-space utilities like the irmanager and probably irattach as well. For more information, see the file Documentation/networking/irda.txt. You also want to read the IR-HOWTO, available at http://www.linuxdoc.org/docs.html#howto . This support is also available as a module. If you want to compile it as a module, say M here and read Documentation/modules.txt. IrDA Cache last LSAP CONFIG_IRDA_CACHE_LAST_LSAP Say Y here if you want IrLMP to cache the last LSAP used. This makes sense since most frames will be sent/received on the same connection. Enabling this option will save a hash-lookup per frame. If unsure, say Y. IrDA Fast RR's CONFIG_IRDA_FAST_RR Say Y here is you want IrLAP to send fast RR (Receive Ready) frames when acting as a primary station. This will make IrLAP send out a RR frame immediately when receiving a frame if its own transmit queue is currently empty. This will give a lot of speed improvement when receiving much data since the secondary station will not have to wait the max. turn around time before it is allowed to transmit the next time. If the transmit queue of the secondary is also empty the primary will back off waiting longer for sending out the RR frame until the timeout reaches the normal value. Enabling this option will make the IR-diode burn more power and thus reduce your battery life. If unsure, say N. IrDA Debug CONFIG_IRDA_DEBUG Say Y here if you want the IrDA subsystem to write debug information to your syslog. You can change the debug level in /proc/sys/net/irda/debug If unsure, say Y (since it makes it easier to find the bugs). IrLAP Compression support CONFIG_IRDA_COMPRESSION Compression is _not_ part of the IrDA(tm) protocol specification, but it's working great! Linux is the first to try out compression support at the IrLAP layer. This means that you will only benefit from compression if you are running a Linux <-> Linux configuration. If you say Y here, you also need to say Y or M to a compression protocol below. IrLAP Deflate Compression Protocol (EXPERIMENTAL) CONFIG_IRDA_DEFLATE Say Y here if you want to build support for the Deflate compression protocol. The deflate compression (GZIP) is exactly the same as the one used by the PPP protocol. If you want to compile this compression support as a module, say M here and read Documentation/modules.txt. The module will be called irda_deflate.o. IrLAN Protocol CONFIG_IRLAN Say Y here if you want to build support for the IrLAN protocol. If you want to compile it as a module, say M here and read Documentation/modules.txt. IrLAN emulates an Ethernet and makes it possible to put up a wireless LAN using infrared beams. The IrLAN protocol can be used to talk with infrared access points like the HP NetbeamIR, or the ESI JetEye NET. You can also connect to another Linux machine running the IrLAN protocol for ad-hoc networking! IrCOMM Protocol CONFIG_IRCOMM Say Y here if you want to build support for the IrCOMM protocol. If you want to compile it as a module, say M here and read Documentation/modules.txt. IrCOMM implements serial port emulation, and makes it possible to use all existing applications that understands TTY's with an infrared link. Thus you should be able to use application like PPP, minicom and others. Enabling this option will create two modules called ircomm and ircomm_tty. For more information go to http://www.pluto.dti.ne.jp/~thiguchi/irda/ IrTTY IrDA Device Driver CONFIG_IRTTY_SIR Say Y here if you want to build support for the IrTTY line discipline. If you want to compile it as a module, say M here and read Documentation/modules.txt. IrTTY makes it possible to use Linux's own serial driver for all IrDA ports that are 16550 compatible. Most IrDA chips are 16550 compatible so you should probably say Y to this option. Using IrTTY will however limit the speed of the connection to 115200 bps (IrDA SIR mode) If unsure, say Y. IrPORT IrDA Device Driver CONFIG_IRPORT_SIR Say Y here if you want to build support for the IrPORT IrDA device driver. If you want to compile it as a module, say M here and read Documentation/modules.txt. IrPORT can be used instead of IrTTY and sometimes this can be better. One example is if your IrDA port does not have echo-canceling, which will work OK with IrPORT since this driver is working in half-duplex mode only. You don't need to use irattach with IrPORT, but you just insert it the same way as FIR drivers (insmod irport io=0x3e8 irq=11). Notice that IrPORT is a SIR device driver which means that speed is limited to 115200 bps. If unsure, say Y. SiS5513 chipset support CONFIG_BLK_DEV_SIS5513 This driver ensures (U)DMA support for SIS5513 chipset based mainboards. SiS620/530 UDMA mode 4, SiS5600/5597 UDMA mode 2, all other DMA mode 2 limited chipsets are unsupported to date. If you say Y here, you need to say Y to "Use DMA by default when available" as well. Please read the comments at the top of drivers/block/sis5513.c Winbond W83977AF IrDA Device Driver CONFIG_WINBOND_FIR Say Y here if you want to build IrDA support for the Winbond W83977AF super-io chipset. If you want to compile it as a module, say M here and read Documentation/modules.txt. This driver should be used for the IrDA chipset in the Corel NetWinder. The driver supports SIR, MIR and FIR (4Mbps) speeds. NSC PC87108 IrDA Device Driver CONFIG_NSC_FIR Say Y here if you want to build support for the NSC PC87108 IrDA chipset. If you want to compile it as a module, say M here and read Documentation/modules.txt. This drivers currently only supports the ACTiSYS IR2000B ISA card and supports SIR, MIR and FIR (4Mbps) speeds. Toshiba Type-O IR Port Device Driver CONFIG_TOSHIBA_FIR Say Y here if you want to build support for the Toshiba Type-O IR chipset. If you want to compile it as a module, say M here and read Documentation/modules.txt. This chipset is used by the Toshiba Libretto 100CT, and many more laptops. ESI JetEye PC Dongle CONFIG_ESI_DONGLE Say Y here if you want to build support for the Extended Systems JetEye PC dongle. If you want to compile it as a module, say M here and read Documentation/modules.txt. The ESI dongle attaches to the normal 9-pin serial port connector, and can currently only be used by IrTTY. To activate support for ESI dongles you will have to insert "irattach -d esi" in the /etc/irda/drivers script. ACTiSYS IR-220L and IR220L+ dongle CONFIG_ACTISYS_DONGLE Say Y here if you want to build support for the ACTiSYS IR-220L and IR220L+ dongles. If you want to compile it as a module, say M here and read Documentation/modules.txt. The ACTiSYS dongles attaches to the normal 9-pin serial port connector, and can currently only be used by IrTTY. To activate support for ACTiSYS dongles you will have to insert "irattach -d actisys" or "irattach -d actisys_plus" in the/etc/irda/drivers script. Tekram IrMate 210B dongle CONFIG_TEKRAM_DONGLE Say Y here if you want to build support for the Tekram IrMate 210B dongle. If you want to compile it as a module, say M here and read Documentation/modules.txt. The Tekram dongle attaches to the normal 9-pin serial port connector, and can currently only be used by IrTTY. To activate support for Tekram dongles you will have to insert "irattach -d tekram" in the /etc/irda/drivers script. Greenwich GIrBIL dongle CONFIG_GIRBIL_DONGLE Say Y here if you want to build support for the Greenwich GIrBIL dongle. If you want to compile it as a module, say M here and read Documentation/modules.txt. The Greenwich dongle attaches to the normal 9-pin serial port connector, and can currently only be used by IrTTY. To activate support for Greenwich dongles you will have to insert "irattach -d girbil" in the /etc/irda/drivers script. Parallax Litelink dongle CONFIG_LITELINK_DONGLE Say Y here if you want to build support for the Parallax Litelink dongle. If you want to compile it as a module, say M here and read Documentation/modules.txt. The Parallax dongle attaches to the normal 9-pin serial port connector, and can currently only be used by IrTTY. To activate support for Parallax dongles you will have to insert "irattach -d litelink" in the /etc/irda/drivers script. Adaptec Airport 1000 and 2000 dongle CONFIG_AIRPORT_DONGLE Say Y here if you want to build support for the Adaptec Airport 1000 and 2000 dongles. If you want to compile it as a module, say M here and read Documentation/modules.txt. The module will be called airport.o. The Airport dongle attaches to the normal 9-pin serial port connector, and can currently only be used by IrTTY. To activate support for Airport dongles you will have to insert "irattach -d airport" in the /etc/irda/drivers script. VME (Motorola and BVM) support CONFIG_VME Say Y here if you want to build a kernel for a 680x0 based VME board. Boards currently supported include Motorola boards MVME162, MVME166, MVME167, MVME172, and MVME177. BVME4000 and BVME6000 boards from BVM Ltd are also supported. MVME162, 166 and 167 support CONFIG_MVME16x Say Y to include support for Motorola VME boards. This will build a kernel which can run on MVME162, MVME166, MVME167, MVME172, and MVME177 boards. If you select this option you will have to select the appropriate drivers for SCSI, Ethernet and serial ports later on. BVME4000 and BVME6000 support CONFIG_BVME6000 Say Y to include support for VME boards from BVM Ltd. This will build a kernel which can run on BVME4000 and BVME6000 boards. If you select this option you will have to select the appropriate drivers for SCSI, Ethernet and serial ports later on. Use write-through caching for 68060 supervisor accesses CONFIG_060_WRITETHROUGH The 68060 generally uses copyback caching of recently accessed data. Copyback caching means that memory writes will be held in an on-chip cache and only written back to memory some time later. Saying Y here will force supervisor (kernel) accesses to use writethrough caching. Writethrough caching means that data is written to memory straight away, so that cache and memory data always agree. Writethrough caching is less efficient, but is needed for some drivers on 68060 based systems where the 68060 bus snooping signal is hardwired on. The 53c710 SCSI driver is known to suffer from this problem. NCR53C710 SCSI driver for MVME16x CONFIG_MVME16x_SCSI The Motorola MVME162, 166, 167, 172 and 177 boards use the NCR53C710 SCSI controller chip. Almost everyone using one of these boards will want to say Y to this question. NCR53C710 SCSI driver for BVME6000 CONFIG_BVME6000_SCSI The BVME4000 and BVME6000 boards from BVM Ltd use the NCR53C710 SCSI controller chip. Almost everyone using one of these boards will want to say Y to this question. Simple 53c710 SCSI support (Compaq, NCR machines) CONFIG_SCSI_SIM710 This is a driver for the NCR53C710 chip commonly found in Compaq and NCR machines. If you are looking for 53C710 support for an Amiga or some 680x0 based VME card then you probably want the other NCR53C710 driver. MVME16x Ethernet support CONFIG_MVME16x_NET This is the driver for the Ethernet interface on the Motorola MVME162, 166, 167, 172 and 177 boards. Say Y here to include the driver for this chip in your kernel. If you want to compile it as a module, say M here and read Documentation/modules.txt. BVME6000 Ethernet support CONFIG_BVME6000_NET This is the driver for the Ethernet interface on BVME4000 and BVME6000 VME boards. Say Y here to include the driver for this chip in your kernel. If you want to compile it as a module, say M here and read Documentation/modules.txt. CD2401 support for MVME166/7 serial ports CONFIG_SERIAL167 This is the driver for the serial ports on the Motorola MVME166, 167, and 172 boards. Everyone using one of these boards should say Y here. SCC support for MVME162 serial ports CONFIG_MVME162_SCC This is the driver for the serial ports on the Motorola MVME162 and 172 boards. Everyone using one of these boards should say Y here. SCC support for BVME6000 serial ports CONFIG_BVME6000_SCC This is the driver for the serial ports on the BVME4000 and BVME6000 boards from BVM Ltd. Everyone using one of these boards should say Y here. Support for user-space parallel port device drivers CONFIG_PPDEV Saying Y to this adds support for /dev/parport device nodes. This is needed for programs that want portable access to the parallel port, for instance deviceid (which displays Plug-and-Play device IDs). This is the parallel port equivalent of SCSI generic support (sg). It is safe to say N to this -- it is not needed for normal printing or parallel port CD-ROM/disk support. This support is also available as a module. If you want to compile it as a module, say M here and read Documentation/modules.txt. The module will be called ppdev.o. If unsure, say N. Kernel httpd acceleration (EXPERIMENTAL) CONFIG_KHTTPD The kernel httpd acceleration daemon (kHTTPd) is a (limited) web server build into the kernel. It is limited since it can only serve files from the filesystem. Saying "M" here builds the kHTTPd module; this is NOT enough to have a working kHTTPd. For safety reasons, the module has to be activated by doing a "echo 1 > /proc/sys/net/khttpd/start" after inserting the module. Before using this, read the README in /usr/src/linux/net/khttpd ! The kHTTPd is experimental. Be careful when using it on a production machine. Also note that kHTTPd doesn't support virtual servers yet. I2C support CONFIG_I2C I2C (pronounce: I-square-C) is a slow bus protocol developed by Philips. SMBus, or System Management Bus is a sub-protocol of I2C. Both I2C and SMBus are supported here. You will need this for hardware sensors support, and in the future for Video for Linux support. Beside this option, you will also need to select specific drivers for your bus adapter(s). I2C bit-banging interfaces CONFIG_I2C_ALGOBIT This allows you to use a range of I2C adapters called bit-banging adapters. Why they are called so is rather technical and uninteresting; but you need to select this if you own one of the adapters listed under it. Philips style parallel port adapter CONFIG_I2C_PHILIPSPAR This supports parallel-port I2C adapters made by Philips. Unless you own such an adapter, you do not need to select this. ELV adapter CONFIG_I2C_ELV This supports parallel-port I2C adapters called ELV. Unless you own such an adapter, you do not need to select this. Velleman K9000 adapter CONFIG_I2C_VELLEMAN This supports the Velleman K9000 parallel-port I2C adapter. Unless you own such an adapter, you do not need to select this. I2C PCF 8584 interfaces CONFIG_I2C_ALGOPCF This allows you to use a range of I2C adapters called PCF adapters. Why they are called so is rather technical and uninteresting; but you need to select this if you own one of the adapters listed under it. Elektor ISA card CONFIG_I2C_ELEKTOR This supports the PCF8584 ISA bus I2C adapter. Unless you own such an adapter, you do not need to select this. I2C device interface CONFIG_I2C_CHARDEV Here you find the drivers which allow you to use the i2c-* device files, usually found in the /dev directory on your system. They make it possible to have user-space programs use the I2C bus. # # A couple of things I keep forgetting: # capitalize: AppleTalk, Ethernet, DOS, DMA, FAT, FTP, Internet, # Intel, IRQ, Linux, MSDOS, NetWare, NetWinder, NFS, # PCI, SCSI, SPARC # two words: hard drive, hard disk, sound card, home page # other: it's safe to save; daemon; use --, not - or --- # # # This is used by Emacs' spell checker ispell.el: # # LocalWords: CONFIG coprocessor DX Pentium SX lilo loadlin HOWTO ftp metalab # LocalWords: unc edu docs emu README kB BLK DEV FD Thinkpad fd MFM RLL IDE gz # LocalWords: cdrom diskless netboot nfs xzvf ATAPI MB ide pavia rubini pl pd # LocalWords: HD CDROMs IDECD NEC MITSUMI filesystem XT XD PCI BIOS cezar ATEN # LocalWords: ISA EISA Microchannel VESA BIOSes IPC SYSVIPC ipc Ctrl dmesg hlt # LocalWords: BINFMT Linkable http ac uk jo html GCC SPARC AVANTI CABRIOLET EB # LocalWords: netscape gcc LD CC toplevel MODVERSIONS insmod rmmod modprobe IP # LocalWords: genksyms INET loopback gatewaying ethernet PPP ARP Arp MEMSIZE # 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