1 assume cs:code
2 //把中断处理程序导入0020:0处,用另一程序测试
3 code segment
4 start:
5 mov ax,cs
6 mov ds,ax
7 mov si,offset do0
8 mov ax,0
9 mov es,ax
10 mov di,200h
11 mov cx,offset do0end - offset do0
12 cld
13 rep movsb
14 mov ax,0
15 mov es,ax
16 mov word ptr es:[0*4],200h
17 mov word ptr es:[0*4+2],0
18 mov ax,4c00h
19 int 21h
20 do0:
21 jmp short do0start
22 db 'overflow!'
23 do0start:
24 mov ax,cs
25 mov ds,ax
26 mov si,202h
27 mov ax,0b800h
28 mov es,ax
29 mov di,12*160 + 36*2
30 mov cx,9
31 s:
32 mov al,[si]
33 mov es:[di],al
34 inc si
35 add di,2
36 loop s
37 mov ax,4c00h
38 int 21h
39 do0end:
40 nop
41 code ends
42
43 end start
1 assume cs:code
2 //测试程序,可显示
3 code segment
4 start:
5 mov ax,1000h
6 mov bl,1
7 div bl
8 mov ax,4c00h
9 int 21h
10 code ends
11
12 end start
