汇编语言——显示字符串(子程序)

爱被打了一巴掌 2022-09-06 10:18 142阅读 0赞

## 运行效果(显示"Welcome to masm!"字符串): ##

![(https://img-blog.csdnimg.cn/f77a4961df2f4350b7fae9e82aa44a89.png?x-oss-process=image/watermark,type\_ZmFuZ3poZW5naGVpdGk,shadow\_10,text\_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl81MzM5MTk1Nw==,size\_16,color\_FFFFFF,t\_70)][https_img-blog.csdnimg.cn_f77a4961df2f4350b7fae9e82aa44a89.png_x-oss-process_image_watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl81MzM5MTk1Nw_size_16_color_FFFFFF_t_70]  
程序如下：

assume cs:code
    data segment
    	db 'Welcome to masm!',0
    data ends
    
    code segment
    start:	
    	mov dh,8
    	mov dl,3
    	mov cl,2
    	mov ax,data 
    	mov ds,ax
    	mov si,0
    	
    	call show_str
    	
    	mov ax,4c00h
    	int 21h
    
    show_str:
    	push cx
    	push si
    	;ax获取，bx存放
    	mov al,0a0h
    	
    	dec dh
    	mul dh
    	
    	mov bx,ax
    	
    	mov al,2
    	mul dl
    	sub ax,2
    	
    	add bx,ax
    	;ax行列号偏移地址获取，bx存放行列号偏移地址
    	
    	mov ax,0b800h
    	mov es,ax
    	
    	mov di,0
    	
    	mov al,cl	;al存放颜色，cl存放字符
    	
    	mov ch,0
    
    s:	
    	mov cl,ds:[si]
    	
    	jcxz ok
    	
    	;al存放颜色，cl存放字符
    	mov es:[bx+di],cl
    	mov es:[bx+di+1],al
    	
    	inc si
    	
    	add di,2
    	jmp short s
    	
    ok:
    	pop si
    	pop cx
    	ret
    
    
    code ends
    end start

[https_img-blog.csdnimg.cn_f77a4961df2f4350b7fae9e82aa44a89.png_x-oss-process_image_watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl81MzM5MTk1Nw_size_16_color_FFFFFF_t_70]: /images/20220829/2e48a1f8efd5488ca6089ab7b2b7e467.png