把RAM区内4000H~40FFH内容清零

2025-02-27 08:44:29
推荐回答(3个)
回答1:

MOV AX,0
MOV DS,AX
MOV CX,256
MOV SI, 0
AA:MOV [SI],0
INC SI
LOOP AA

回答2:

mov ax,4000h
mov cx,0ffh
s:
mov byte ptr[ax+cx],0
loop s
mov ax,4000h
mov byte ptr[ax],0

回答3:

进入DEBUG,
输入f4000 40ff
OK!