汇编语言实验九

在屏幕中间显示‘welcome to masm!’

assume cs:code,ds:datasg

datasg segment
	db 'welcome to masm!'
datasg ends

stack segment
	dw 0,0,0,0,0,0,0,0
stack ends


code segment	;代码段

	start:	
		nop
		mov cx,16
		mov si,0
		mov bx,0

	s:	mov ax,datasg
		mov ds,ax
		
		mov dh,02
		mov dl, ds:[bx] ; data to dx

		mov ax,0b800h
		mov ds,ax		
		
		mov ds:[si+720h],dl	
		mov ds:[si+720h+1],dh ; dx to b800h	
		
		inc bx
		add si,2

		loop s	
	
		mov cx,16
		mov si,0
		mov bx,0

	s1:	mov ax,datasg
		mov ds,ax
		
		mov dh,24h
		mov dl, ds:[bx] ; data to dx

		mov ax,0b800h
		mov ds,ax		
		
		mov ds:[si+7c0h],dl	
		mov ds:[si+7c0h+1],dh ; dx to b800h	
		
		inc bx
		add si,2

		loop s1

		mov cx,16
		mov si,0
		mov bx,0

	s2:	mov ax,datasg
		mov ds,ax
		
		mov dh,71h
		mov dl, ds:[bx] ; data to dx

		mov ax,0b800h
		mov ds,ax		
		
		mov ds:[si+860h],dl	
		mov ds:[si+860h+1],dh ; dx to b800h	
		
		inc bx
		add si,2

		loop s2

		mov ax,4c00h	;程序返回
		int 21h

		
code ends
end start	;start标号处作为程序入口
在这里插入代码片