diff options
| author | Bruce Robson <syslinux@mailinator.com> | 2008-02-16 16:06:18 -0800 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2008-02-16 16:06:18 -0800 |
| commit | cfd4ca71972366cbde56d7804696dede526b84c1 (patch) | |
| tree | 542b13657a6f9f3c6f16b32c39cc14a63b1a4a9e | |
| parent | 692f55c6ea720972780d47084a4a2146e56003d5 (diff) | |
| download | syslinux-cfd4ca71972366cbde56d7804696dede526b84c1.tar.gz | |
ISOLINUX: Adaptec bug fix: handle the case of DL missing bit 7syslinux-3.62-pre9
Intel Classic R+ computer with Adaptec 1542CP BIOS 1.02 passes garbage
in sp_drive, and the drive number originally passed in DL does not
have 80h bit set. Check for this case and compensate if appropriate.
| -rw-r--r-- | isolinux.asm | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/isolinux.asm b/isolinux.asm index be8fd0f7..c2457697 100644 --- a/isolinux.asm +++ b/isolinux.asm @@ -320,7 +320,7 @@ found_drive: call writemsg %endif - ; No such luck. See if the the spec packet contained one. + ; No such luck. See if the spec packet contained one. mov eax,[sp_lba] and eax,eax jz set_file ; Good enough @@ -578,16 +578,24 @@ spec_query_failed: ; Okay, good enough... mov si,alright_msg call writemsg - mov [DriveNumber],dl +.found_drive0: mov [DriveNumber],dl .found_drive: jmp found_drive ; Award BIOS 4.51 apparently passes garbage in sp_drive, ; but if this was the drive number originally passed in ; DL then consider it "good enough" .maybe_broken: - cmp byte [DriveNumber],dl + mov al,[DriveNumber] + cmp al,dl je .found_drive + ; Intel Classic R+ computer with Adaptec 1542CP BIOS 1.02 + ; passes garbage in sp_drive, and the drive number originally + ; passed in DL does not have 80h bit set. + or al,80h + cmp al,dl + je .found_drive0 + .still_broken: dec dx cmp dl, 80h jnb .test_loop |