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| author | H. Peter Anvin <hpa@zytor.com> | 2009-04-04 15:32:24 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2009-04-04 15:32:24 -0700 |
| commit | f7b5a2254ab7c8aa87679c1b731d2ea285c22e80 (patch) | |
| tree | 08e1e00576717e1ca557101164b7e6639e0172a1 /mbr/gptmbr.S | |
| parent | dd51053bbd4a1613d1e3384928a7da7bb164562f (diff) | |
| download | syslinux-f7b5a2254ab7c8aa87679c1b731d2ea285c22e80.tar.gz syslinux-f7b5a2254ab7c8aa87679c1b731d2ea285c22e80.tar.xz syslinux-f7b5a2254ab7c8aa87679c1b731d2ea285c22e80.zip | |
mbr: generate normal versions, force-80 versions, and ctrl-80 versions
Produce MBR variants with normal (DL) behavior, force to drive 80
behavior, and force to 80 on Ctrl pressed behavior.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'mbr/gptmbr.S')
| -rw-r--r-- | mbr/gptmbr.S | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/mbr/gptmbr.S b/mbr/gptmbr.S index 6df67f42..8d42e8b8 100644 --- a/mbr/gptmbr.S +++ b/mbr/gptmbr.S @@ -26,6 +26,8 @@ * * ----------------------------------------------------------------------- */ +#include "adjust.h" + .code16 .text @@ -74,11 +76,8 @@ _start: ljmpw $0, $next next: - /* Escape for the user: if Ctrl is pressed, assume drive hd0 */ - testb $0x04, BIOS_kbdflags /* Ctrl pressed */ - jz 1f - movb $0x80, %dl -1: + + ADJUST_DRIVE pushw %dx /* 0(%bp) = %dl -> drive number */ /* Check to see if we have EBIOS */ @@ -170,10 +169,10 @@ find_part: found_part: xchgw %ax,%cx /* Set up %cx for rep movsb further down */ - + movw $dssi_out,%di pushw %di - + /* 80 00 00 00 ee 00 00 00 - bootable partition, type EFI (EE), no CHS information */ xorl %eax,%eax |