《彙編語言》王爽—第七章實驗六詳解

編程，完成問題7.9中的程序

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

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,datasg

       mov ds,ax

       mov bx,0

       mov ax,stacksg

       mov ss,ax

       mov sp,16

       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

D:\>debug sy7-9.exe

-d0c4e:0 3f

0C4E:0000  31 2E 20 64 69 73 70 6C-61 79 20 20 20 20 20 20   1. display

0C4E:0010  32 2E 20 62 72 6F 77 73-20 20 20 20 20 20 20 20   2. brows

0C4E:0020  33 2E 20 72 65 70 6C 61-63 65 20 20 20 20 20 20   3. replace

0C4E:0030  34 2E 20 6D 6F 64 69 66-79 20 20 20 20 20 20 20   4. modify

-g

Program terminated normally

-d 0c4e:0 3f

0C4E:0000  31 2E 20 44 49 53 50 6C-61 79 20 20 20 20 20 20   1. DISPlay

0C4E:0010  32 2E 20 42 52 4F 57 73-20 20 20 20 20 20 20 20   2. BROWs

0C4E:0020  33 2E 20 52 45 50 4C 61-63 65 20 20 20 20 20 20   3. REPLace

0C4E:0030  34 2E 20 4D 4F 44 49 66-79 20 20 20 20 20 20 20   4. MODIfy

-