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博客园 - IT 笔记

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IT 笔记 · 2011-07-22 · via 博客园 - IT 笔记

题目要求将代码补全,JMP 可以回到程序开始位置。

下面是网上的答案, 运行是正确的, 但我有个疑惑是红色标志的代码好像是可有可无,我去掉这行一样是满足要求。

不知道这行的用意是什么? 

assume cs:code

data segment

dd 12345678H

data ends

code segment

start: mov ax, data

mov ds, ax

mov bx, 0

mov [bx], bx

mov [bx+2], cs

jmp word ptr ds:[0]

mov ax, 4c00h

int 21h

code ends

end start

posted on 2011-07-22 04:43  IT 笔记  阅读(1503)  评论(1)    收藏  举报