diff options
| author | Ralf Baechle <ralf@linux-mips.org> | 1999-01-03 17:49:53 +0000 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 1999-01-03 17:49:53 +0000 |
| commit | eb7a5bf93aaa4be1d7c6181100ab7639e74d67f7 (patch) | |
| tree | 5746fea1605ff013be9b78a1556aaad7615d664a /arch/i386/boot/setup.S | |
| parent | 80ea5b1e15398277650e1197957053b5a71c08bc (diff) | |
Merge with Linux 2.1.131 plus some more MIPS goodies.
Diffstat (limited to 'arch/i386/boot/setup.S')
| -rw-r--r-- | arch/i386/boot/setup.S | 32 |
1 files changed, 27 insertions, 5 deletions
diff --git a/arch/i386/boot/setup.S b/arch/i386/boot/setup.S index 22fca192c..a2c8ecb37 100644 --- a/arch/i386/boot/setup.S +++ b/arch/i386/boot/setup.S @@ -145,7 +145,7 @@ start_of_setup: jne bad_sig jmp good_sig1 -! Routine to print ASCII string at DS:SI +! Routine to print ASCIIz string at DS:SI prtstr: lodsb and al,al @@ -345,7 +345,7 @@ is_disk1: mov ds,ax mov ds,ax xor ax,ax - mov [0x220], ax ! set table length to 0 + mov [0xa0], ax ! set table length to 0 mov ah, #0xc0 stc int 0x15 ! puts feature table at es:bx @@ -357,9 +357,13 @@ is_disk1: sub ax, #DELTA_INITSEG ! aka #INITSEG mov es,ax mov si,bx - mov di,#0x220 + mov di,#0xa0 mov cx,(si) add cx,#2 ! table length is a short + cmp cx,#0x10 + jc sysdesc_ok + mov cx,#0x10 ! we keep only first 16 bytes +sysdesc_ok: rep movsb pop ds @@ -392,8 +396,6 @@ no_psmouse: cmp bx,#0x0504d ! check for "PM" signature jne done_apm_bios ! no signature -> no APM BIOS - mov [64],ax ! record the APM BIOS version - mov [76],cx ! and flags and cx,#0x02 ! Is 32 bit supported? je done_apm_bios ! no ... @@ -412,6 +414,26 @@ no_psmouse: mov [74],dx ! BIOS data segment mov [78],esi ! BIOS code segment length mov [82],di ! BIOS data segment length +! +! Redo the installation check as the 32 bit connect +! modifies the flags returned on some BIOSs +! + mov ax,#0x05300 ! APM BIOS installation check + xor bx,bx + int 0x15 + jc apm_disconnect ! error -> should not happen, tidy up + + cmp bx,#0x0504d ! check for "PM" signature + jne apm_disconnect ! no signature -> should not happen, tidy up + + mov [64],ax ! record the APM BIOS version + mov [76],cx ! and flags + jmp done_apm_bios + +apm_disconnect: + mov ax,#0x05304 ! Disconnect + xor bx,bx + int 0x15 ! ignore return code jmp done_apm_bios no_32_apm_bios: |