汇编语言（王爽）实验十

 1 assume cs:code
 2 data segment
 3     db ‘Welcome to masm!‘,0
 4 data ends
 5 
 6 code segment
 7 start:
 8     mov dh,8
 9     mov dl,3
10     mov cl,2
11     mov ax,data
12     mov ds,ax
13     mov si,0
14     call show_str
15 
16     mov ax,4c00h
17     int 21h
18 show_str:
19     mov bx,cx
20 
21     mov ax,data
22     mov ds,ax
23 
24     mov ax,0b800h
25     mov es,ax
26 
27     mov al,160
28     mul dh
29 
30     add dl,dl
31     mov cl,dl
32     mov ch,0
33 
34     add ax,cx
35     mov di,ax
36 
37 
38     s:
39     mov ch,0
40     mov cl,ds:[si]
41     jcxz brk
42     mov al,ds:[si]
43     mov ah,bl
44     mov es:[di],ax
45     inc di
46     inc di
47     inc si
48     loop s
49 
50 
51     brk:
52     ret
53 
54     code ends
55     end start