Apparently using APM opcode 07h to do a system shutdown only works if you
kick the APM BIOS into v1.1 or better mode. The attached patch does this,
correctly shutting an APM 1.1 or 1.2-compliant system down as intended.
Please test this patch, and let me know if it doesn't work for anyone.
Derrik Pates | Sysadmin, Douglas School | #linuxOS on EFnet
[EMAIL PROTECTED] | District (dsdk12.net) | #linuxOS on OPN
--- orig/grub-0.90/stage2/asm.S Tue Feb 27 05:59:00 2001
+++ grub-0.90/stage2/asm.S Thu Aug 2 00:25:42 2001
@@ -260,12 +260,19 @@
xorw %bx, %bx
int $0x15
- /* connect APM (Is this really necessary?) */
+ /* connect APM */
movw $0x5301, %ax
xorw %bx, %bx
int $0x15
jc EXT_C(hard_stop)
+ /* set APM protocol level - 1.1 or bust. (this covers APM 1.2 also) */
+ movw $0x530E, %ax
+ xorw %bx, %bx
+ movw $0x101, %cx
+ int $0x15
+ jc EXT_C(hard_stop)
+
/* set the power state to off */
movw $0x5307, %ax
movw $1, %bx
