boot/i386/pc/boot.S reads:
/*
* This is a workaround for buggy BIOSes which don't pass boot
* drive correctly. If GRUB is installed into a HDD, check if
* DL is masked correctly. If not, assume that the BIOS passed
* a bogus value and set DL to 0x80, since this is the only
* possible boot drive. If GRUB is installed into a floppy,
* this does nothing (only jump).
*/
boot_drive_check:
jmp 1f /* grub-setup may overwrite this jump */
testb $0x80, %dl
jnz 1f
movb $0x80, %dl
1:
However, if 0x80 is really "the only possible boot drive", that means the
test is pointless and can be replaced with:
boot_drive_check:
jmp 1f /* grub-setup may overwrite this jump */
movb $0x80, %dl
1:
So AFAICT either the comment or the code needs adjusting.
--
Robert Millan
<GPLv2> I know my rights; I want my phone call!
<DRM> What use is a phone call, if you are unable to speak?
(as seen on /.)
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