time.txt

掌握译码电路原理与连线、Inte8253控制工作方式与连线、发光二极管控制原理与电路 接线、编写程序、调试运行

cseg segment
     assume cs:cseg,ds:cseg
start:
      mov dx,307h
      mov al,10010110b
      out dx,al
      mov dx,306h
      mov al,0
      out dx,al
      mov dx,307h
      mov al,01010110b
      out dx,al
      mov al,73
      mov dx,305h
      out dx,al
      mov ax,4c00h
      int 21h
cseg  ends
      end start