汇编语言问题7.9&实验六完整代码

汇编语言问题7.9&实验六完整代码

建议先自己思考问题的答案,不懂则返回看书

问题7.9&实验六

assume cs:code,ds:data,ss:stack
stack segment
 dw 0,0,0,0,0,0,0,0
stack ends

data segment
 db '1. display      '
 db '2. brows        '
 db '3. replace      '
 db '4. modify       '
data ends

code segment
start:
mov ax,stack
mov ss,ax
mov sp,16

mov ax,data
mov ds,ax

mov bx,0
mov cx,4

s0:
push cx
mov si,0

mov cx,4
s1:
mov al,ds:[bx+si+3]
and al,11011111b
mov ds:[bx+si+3],al
inc si
loop s1

add bx,16
pop cx
loop s0

mov ax,4c00h
int 21h
code ends
end start
           

此代码在DOSBox下的运行结果：