2002-12-11  Yoshinori K. Okuji  <okuji@enbug.org>

	Add a workaround for buggy BIOSes which don't pass boot drive
	correctly. The idea is that GRUB forces the fixed disk flag
	when booted from a hard disk. When BIOS loads GRUB directly,
	the boot drive must be either of 0x00 and 0x80, so this should
	work, if those BIOSes always pass zero to %dl. AFAIK, this
	assumption is always correct.

	* stage2/builtins.c (install_func): Store the fixed disk flag of
	the destination drive in BOOT_DRIVE_MASK in Stage 1.

	* stage1/stage1.h (STAGE1_BOOT_DRIVE_MASK): New macro.

	* stage1/stage1.S (boot_drive_mask): New variable. It is or'ed
	to %dl.
4 files changed