第九章实验九，一早上一下午的成果，非甲鱼老师的代码

decoder

运行结果

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1. [hide]assume ds:data,cs:code
   
2. data segment
   
3. db 'WELCOME TO MASM!'
   
4. db 02h,24h,71h
   
5. db 32 dup(0)
   
6. data ends
   
7. 
   
8. code segment
   
9. start:
   
10. mov ax,data
    
11. mov ds,ax
    
12. mov ax,0b87ch
    
13. mov es,ax
    
14. mov bx,0
    
15. mov si,0
    
16. mov di,0h
    
17. mov cx,10h
    
18. s:         xor ax,ax
    
19. mov al,[bx]
    
20. mov byte ptr [si+13h],al
    
21. mov dl,ds:[10h]
    
22. mov byte ptr [si+14h],dl
    
23. mov ax,word ptr ds:[si+13h]
    
24. mov es:[di],ax
    
25. mov dl,ds:[11h]
    
26. mov byte ptr [si+14h],dl
    
27. mov ax,word ptr ds:[si+13h]
    
28. mov es:[di+0a0h],ax
    
29. mov dl,ds:[12h]
    
30. mov byte ptr [si+14h],dl
    
31. mov ax,word ptr ds:[si+13h]
    
32. mov es:[di+140h],ax
    
33. inc bx
    
34. inc di
    
35. inc di
    
36. add si,2
    
37. loop s
    
38. 
    
39. mov ax,4c00h
    
40. int 21h
    
41. code ends
    
42. end start[/hide]

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