diff options
Diffstat (limited to 'Documentation/fb')
-rw-r--r-- | Documentation/fb/aty128fb.txt | 72 | ||||
-rw-r--r-- | Documentation/fb/framebuffer.txt | 4 |
2 files changed, 74 insertions, 2 deletions
diff --git a/Documentation/fb/aty128fb.txt b/Documentation/fb/aty128fb.txt new file mode 100644 index 000000000..c1c574b42 --- /dev/null +++ b/Documentation/fb/aty128fb.txt @@ -0,0 +1,72 @@ +[This file is cloned from VesaFB/matroxfb] + +What is aty128fb? +================= + +This is a driver for a graphic framebuffer for ATI Rage128 based devices +on Intel and PPC boxes. + +Advantages: + + * It provides a nice large console (128 cols + 48 lines with 1024x768) + without using tiny, unreadable fonts. + * You can run XF68_FBDev on top of /dev/fb0 + * Most important: boot logo :-) + +Disadvantages: + + * graphic mode is slower than text mode... but you should not notice + if you use same resolution as you used in textmode. + * still experimental. + + +How to use it? +============== + +Switching modes is done using the video=aty128fb:<resolution>... modedb +boot parameter or using `fbset' program. + +See Documentation/fb/modedb.txt for more information on modedb +resolutions. + +You should compile in both vgacon (to boot if you remove your Rage128 from +box) and aty128fb (for graphics mode). You should not compile-in vesafb +unless you have primary display on non-Rage128 VBE2.0 device (see +Documentation/vesafb.txt for details). + + +X11 +=== + +XF68_FBDev should generally work fine, but it is non-accelerated. As of +this document, 8 and 32bpp works fine. There have been palette issues +when switching from X to console and back to X. You will have to restart +X to fix this. + + +Configuration +============= + +You can pass kernel command line options to vesafb with +`video=aty128fb:option1,option2:value2,option3' (multiple options should +be separated by comma, values are separated from options by `:'). +Accepted options: + +noaccel - do not use acceleration engine. It is default. +accel - use acceleration engine. Not finished. +vmode:x - chooses PowerMacintosh video mode <x>. Depreciated. +cmode:x - chooses PowerMacintosh colour mode <x>. Depreciated. +<XxX@X> - selects startup videomode. See modedb.txt for detailed + explanation. Default is 640x480x8bpp. + + +Limitations +=========== + +There are known and unknown bugs, features and misfeatures. +Currently there are following known bugs: + + This driver is still experimental and is not finished. Too many + bugs/eratta to list here. + +-- +Brad Douglas <brad@neruo.com> diff --git a/Documentation/fb/framebuffer.txt b/Documentation/fb/framebuffer.txt index c36c76f03..e8c51d1b5 100644 --- a/Documentation/fb/framebuffer.txt +++ b/Documentation/fb/framebuffer.txt @@ -29,9 +29,9 @@ By convention, the following device nodes are used (numbers indicate the device minor numbers): 0 = /dev/fb0 First frame buffer - 32 = /dev/fb1 Second frame buffer + 1 = /dev/fb1 Second frame buffer ... - 224 = /dev/fb7 8th frame buffer + 31 = /dev/fb31 32nd frame buffer For backwards compatibility, you may want to create the following symbolic links: |