sound.asm

来自「这是一个电话号码程序」· 汇编 代码 · 共 18 行

sound proc near
push ax
push dx
mov dx,cx
in al,61h
and al,11111100b
trig:
xor al,2
out 61h,al
mov cx,bx
delay:
loop delay 
dec dx
jne trig
pop dx
pop ax
ret 
sound endp