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
设置中断向量表
mov ax,4c00h
int 21h
do0: jmp short do0start
db "overflow!"
do0start: mov ax,cs
mov ds,ax
mov si,0
mov ax,0b800h
mov es,ax
mov di,12*160+36*2
mov cx,9
s: mov al,[si]
mov es:[di],al
inc si
add di,2
loop s
mov ax,4c00h
int 21h
do0end:nop 这里不明白，为什么没有程序结束语句啊，比如end do0start
code ends
end start |
