diff options
Diffstat (limited to 'modules')
| -rw-r--r-- | modules/Makefile | 2 | ||||
| -rw-r--r-- | modules/poweroff.asm | 86 |
2 files changed, 87 insertions, 1 deletions
diff --git a/modules/Makefile b/modules/Makefile index 2668be82..80eb995d 100644 --- a/modules/Makefile +++ b/modules/Makefile @@ -19,7 +19,7 @@ include $(topdir)/MCONFIG.embedded INCLUDES = -I$(com32)/include -BINS = pxechain.com gfxboot.com +BINS = pxechain.com gfxboot.com poweroff.com all: $(BINS) diff --git a/modules/poweroff.asm b/modules/poweroff.asm new file mode 100644 index 00000000..474723de --- /dev/null +++ b/modules/poweroff.asm @@ -0,0 +1,86 @@ + absolute 0 +pspInt20: resw 1 +pspNextP: resw 1 + resb 124 +pspCmdLen: resb 1 +pspCmdArg: resb 127 + + section .text + org 0x100 + +_start: + mov ax,5300h ; APM Installation Check (00h) + xor bx,bx ; APM BIOS (0000h) + int 15h + jnc check_sig + + mov bx, msg_notpresent + jmp error + +check_sig: + cmp bx,504Dh ; signature 'PM' + je check_ver + + mov bx, msg_notpresent + jmp error + +check_ver: + cmp ax,0101h ; Need version 1.1+ + jae check_state + + mov bx, msg_notsup + jmp error + +check_state: + test cx,8 ; bit 3 APM BIOS Power Management disabled + jz connect + + mov bx, msg_pmdisabled + jmp error + +connect: + mov ax,5301h ; APM Real Mode Interface Connect (01h) + xor bx,bx ; APM BIOS (0000h) + int 15h + jnc connect_ok + + mov bx, msg_connect + jmp error + +connect_ok: + mov ax,530Eh ; APM Driver Version (0Eh) + xor bx,bx ; APM BIOS (0000h) + mov cx,0101h ; APM Driver version 1.1 + int 15h + jnc apm0101_check + + mov bx, msg_notsup + jmp error + +apm0101_check: + cmp cx,0101h ; APM Connection version + jae apm0101_ok + + mov bx, msg_notsup + jmp error + +apm0101_ok: + mov ax,5307h ; Set Power State (07h) + mov bx,0001h ; All devices power managed by the APM BIOS + mov cx,0003h ; Power state off + int 15h + jnc off + + mov bx, msg_failed + +error: + mov ax,2 + int 22h +off: + ret + +msg_notpresent: db 'APM not present.',0dh,0ah,0 +msg_notsup: db 'APM 1.1+ not supported.',0dh,0ah,0 +msg_pmdisabled: db 'Power management disabled.',0dh,0ah,0 +msg_connect: db 'APM RM interface connect failed.',0dh,0ah,0 +msg_failed: db 'Power off failed.',0dh,0ah,0 |