1. 显示字符串
1 assume cs:code
2
3 data segment
4 db 'Welcome to masm!',0
5 data ends
6
7 stack segment
8 db 16 dup (0)
9 stack ends
10
11 code segment
12 start:
13 mov dh,8
14 mov dl,3
15 mov cl,2
16 mov ax,data
17 mov ds,ax
18 mov si,0
19 call show_str
20
21 ;一直循环
22 all:
23 jmp short all
24
25 mov ax,4c00h
26 int 21h
27
28 show_str:
29 mov bl,1
30 mov al,dh
31 sub al,bl
32 ;（n行-1）*160=n行开头的偏移地址
33 mov bl,160
34 mul bl
35 mov bx,0b800h
36 mov es,bx ;显存的段地址放在es
37 mov bx,ax ;行
38 mov dh,0
39 ; （n列-1）*2=当前列的偏移地址
40 mov di,dx
41 sub di,1
42 add di,di
43 ;颜色设置
44 mov ch,0
45 mov dx,cx
46 s:
47 mov cl,[si]
48 mov ch,0
49 jcxz ok
50 mov ax,[si]
51 mov es:[bx+di],ax
52 mov es:[bx+di+1],dx
53 ;一个字母占两个字节，一个ascii
54 add di,2
55 inc si
56 loop s
57
58 ok:
59 ret
60
61 code ends
62 end start
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