王爽《汇编语言》(第三版)实验14解析

代码

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cs:code data segment db '00/00/00 00:00:00','$' db 9,8,7,4,2,0 data ends code segment start: mov ax,data mov ds,ax mov di,0 mov si,18 mov cx,6 s: mov al,[si] out 70h,al in al,71h mov ah,al mov cl,4 shr ah,cl and al,00001111b add ah,30h add al,30h mov byte ptr [di],ah mov byte ptr [di+1],al ;个位数码 inc si add di,3 loop s mov ah,2 mov bh,0 mov dh,12 mov dl,15 int 10h mov ax,data mov ds,ax mov dx,0 mov ah,9 int 21h mov ax,4c00h int 21h code ends end start