China DOS Union

.Model tiny
.Code
Org 100h
Start:

mov ax,5300h
xor bx,bx
int 15h ; Check APM install
jnb @@1
jmp ExitSys

@@1:
cmp bx,504Dh ; sign
jz @@2
jmp ExitSys

@@2:
cmp ax,101h ; ver 1.1
jnb @@3
jmp ExitSys

@@3:
push cx
mov Version,ax
mov ax,5400h
xor bx,bx
int 2Fh ; power.exe install check?
xor ax,ax
cmp bx,504Dh
jnz @@4
push ax ; power.exe version
mov ax,5401h
mov bx,100h
int 2Fh ; set management enable
pop ax
jb @@4
inc ax
@@4:
pop cx
push ax
push bx
push cx
mov ax,5301h
xor bx,bx
int 15h ; real-mode interface
mov ax,530Eh
xor bx,bx
mov cx,101h
int 15h ; driver version
mov ax,530Fh
mov bx,1
mov cx,bx
int 15h ; engage power management
mov ax,5308h
mov bx,1
mov cx,bx
int 15h ; enable power mamagement
mov ax,5307h
mov bx,1
mov cx,3
int 15h ; power off
pop cx ; support device

test cl,8 ; BIOS power management disable?
jz @@5
push cx
mov ax,5308h
mov bx,1
xor cx,cx
int 15h ; system stand-by
pop cx

@@5:
test cl,10h ; BIOS power disengaged
jz @@6
mov ax,530Fh
mov bx,1
xor cx,cx
int 15h ; disengage power management

@@6:
mov ax,5304h
xor bx,bx
int 15h ; disconnect interface
pop bx
pop ax
test ax,ax
jz ExitSys
mov ax,5401h
mov bl,bh
mov bh,1
int 2Fh ; set APM firmware power manager enable

ExitSys:

mov ax,4c00h
int 21h

Version DW ?

End Start

I'll give it a try.

Thank you, I will cherish it.