汇编语言 实验10.1

assume cs:code,ds:datasgdatasg segmentdb 'welcome to masm!',0
datasg endsstack segmentdw 0,0,0,0,0,0,0,0
stack endscode segment	;代码段start:	mov dh,8mov dl,3mov cl,2mov ax,datasgmov ds,axmov si,0call show_strmov ax,4c00h	;程序返回int 21hshow_str:mov ax,80mul dhmov dh,0add ax,dxmov dx,2   ; ax * 2mul dx     ;  ax = start addr of displaymov di,ax  ; 将起始地址存在di里mov bl,cl  ; 将格式存在bl里mov cx,0s:  mov cl, byte ptr ds:[si]  ; 数据写入cljcxz zero                 ; 如果数据是0 跳转mov ax,dspush axmov ax,0b800hmov ds,axmov ds:[di],clmov ds:[di+1],blpop axmov ds,axinc siadd di,2jmp short szero:retcode ends
end start	;start标号处作为程序入口