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- assume cs:codesg,ds:datasg,ss:stacksg '实验6
- datasg segment
- db '1. display......'
- db '2. brows........'
- db '3. replace......'
- db '4. modify.......'
- datasg ends
- stacksg segment
- dw 0,0,0,0,0,0,0,0
- stacksg ends
- codesg segment
- start:mov ax,stacksg
- mov ss,ax
- mov sp,16
- mov ax,datasg
- mov ds,ax
- mov bx,0
- mov cx,4
- s0:push cx
- mov si,0
- mov cx,4
- s: mov al,[bx+3+si]
- and al,11011111b
- mov [bx+3+si],al
- inc si
- loop s
- add bx,16
- pop cx
- loop s0
- mov ax,4c00h
- int 21h
- codesg ends
- end start
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