【汇编语言（第3版）王爽】问题7.9代码

assume cs:codesg,  ss:stacksg, ds:datasg

stacksg segment
    dw 0,0,0,0,0,0,0,0
stacksg ends

datasg segment
    db ‘1. display      ‘
    db ‘2. brows        ‘
    db ‘3. replace      ‘
    db ‘4. modify       ‘
datasg ends


codesg segment
start:    mov ax,datasg
        mov ds,ax
        mov ax,stacksg
        mov ss,ax
        mov bx,0
        
        mov cx,4
s:        push cx
        mov si,0
        mov cx,4
s0:        mov ah,3[bx][si]
        and ah,11011111b
        mov 3[bx][si],ah
        inc si
        loop s0
        
        pop cx        
        add bx,16
        loop s
        
        mov ah,4ch
        int 21h

codesg ends
end start