CHƯƠNG TRÌNH THƯỜNG TRÚ NHẤN PHÍM F12 THAY THẾ PHÍM A
Code:
.286
.Model Small
.Code
org 100h
Begin:
jmp Resident
oldint9 dd ?
NewInt9 Proc
Push ax
In al,60h ;doc ma quet al
cmp al,58h
je NewF12
Pop ax
jmp cs:oldint9
NewF12:
Push cx
Mov ah,5
Mov cx,1e61h
Int 16h
Pop cx
Mov al,00100000b ;goi lenh EOI
Out 20h,al
Pop ax
Iret
NewInt9 EndP
Resident:
Mov ax,0000
Mov es,ax
Mov ax,es:[9h*4]
Mov word ptr oldint9,ax
Mov ax,es:[9h*4+2]
Mov word ptr oldint9+2,ax
CLI ;Ghi vao dia chi newint9 vao bang vector ngat
Mov ax, offset NewInt9
Mov es:[9h*4],ax
Mov ax,cs
Mov es:[9h*4+2],ax
STI
Mov dx,offset resident ;thuong tru
Int 27h
End Begin