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- assume cs:code
- code segment
- start: mov ax,cs
- mov ds,ax
- mov si,offset do0
- mov ax,0
- mov es,ax
- mov di,200h
- mov cx,offset do0end-offset do0
- cld
- rep movsb
- ;设置0号中断向量
- mov ax,0
- mov es,ax
- mov word ptr es:[0*4],200h
- mov word ptr es:[0*4+2],0
-
-
-
- mov ax,4c00h
- int 21h
-
-
-
- do0: jmp do0start
- db "overflow"
-
- do0start: mov ax,cs
- mov ds,ax
- mov si,203h
- mov ax,0b800h
- mov es,ax
- mov di,12*160+36*2
- mov cx,8
- s: mov al,ds:[si]
- mov es:[di],al
- mov byte ptr es:[di+1],71h
- add si,1
- add di,2
- loop s
- mov ax,4c00h
- int 21h
- do0end: nop
- code ends
- end start
复制代码
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