汇编语言(王爽)--第十次实验：制作子程序代码

 assume cs:code,ds:data

    
 data segment
    
     db 'welcome to masm!',0
    
 data ends
    
  
    
 code segment
    
  
    
 start: mov dh,8
    
    mov dl,1
    
    mov cl,2
    
    mov ax,data
    
    mov ds,ax
    
    mov si,0
    
    call show_str
    
    
    
    mov ax,4c00h
    
    int 21h
    
 ;显示字符串函数  dh为行号dl为列号cl为颜色       
    
 show_str:mov bl,cl
    
      push cx  
    
      push si
    
      
    
      mov ax,0B800H
    
      mov es,ax                 ;显存段