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- 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
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- call show_str
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- mov ax,4c00h
- int 21h
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- show_str: mov ax,0b800h
- mov es,ax
- mov ax,0
- mov al,dh
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- mov bx,0
- mov bl,160
- mul bl
- mov bx,0
- add bx,ax
- mov ax,0
- mov al,dl
- mul cl
- add bx,ax ;bx为首字偏移值
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- mov al,cl ;颜色放al中保存
- mov di,0
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- s0: mov cl,[si]
- mov ch,0
- jcxz s1 ;cx为零时 跳到s1
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- mov es:[bx+di],cl
- mov es:[bx+di+1],al
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- inc si
- add di,2
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- jmp short s0
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- s1: ret
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- code ends
- end start
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