实验12

eol75999

1. assume cs:code
   
2. code segment
   
3. start:
   
4. mov ax,cs
   
5. mov ds,ax
   
6. mov si,offset d0o
   
7. mov ax,0
   
8. mov es,ax
   
9. mov di,200h
   
10. mov cx,offset d0oend-offset d0o
    
11. cld
    
12. rep movsb
    
13. mov ax,0
    
14. mov es,ax
    
15. mov word ptr es:[0*4],200h
    
16. mov word ptr es:[0*4+2],0
    
17. mov ax,4c00h
    
18. int 21h
    
19. d0o:
    
20. jmp short d0ostart
    
21. db "divide errors!"
    
22. d0ostart:
    
23. mov ax,cs
    
24. mov ds,ax
    
25. mov si,0202h
    
26. mov ax,0b800h
    
27. mov es,ax
    
28. mov di,13*160+36*2
    
29. mov cx,13
    
30. s:
    
31. mov al,[si]
    
32. mov es:[di],al
    
33. mov word ptr es:[di+1],2
    
34. inc si
    
35. add di,2
    
36. loop s
    
37. mov ax,4c00h
    
38. int 21h
    
39. d0oend:
    
40. nop
    
41. code ends
    
42. end start

复制代码