prog7_4.asm

汇编语言-王爽 源代码 加 卜艳萍版源代码

stack  segment stack
       db  64 dup(?)
stack  ends
code  segment
      assume  cs:code,ss:stack
start:mov  dl,0dh
      mov  ah,2
      int  21h
      mov  dl,0ah
      int  21h
      mov  bl,0
next: mov  al,bl
      mov  cl,4
      shr  al,cl
      or  al,30h
      mov  dl,al
      mov  ah,2
      int  21h
      mov  dl,bl
      and  dl,0fh
      or  dl,30h
      mov  ah,2
      int  21h
      mov  al,bl
      inc  al
      daa
      cmp  al,30h
      jnc  finish
      mov  bl,al
      mov  cx,0ffffh
delay:loop  delay
      jmp  next
finish: mov  ah,4ch
      int  21h
code  ends
      end  start