乒乓球比赛的汇编程序，利用8255等芯片完成，利用led等的依次亮灭来表示球的运动状态，可调间隔时间，并显示比分。-Table Tennis Competition assembler, using chips such as the completion of 8255, using led light and so in turn the movement off the ball to that state, adjustable interval, and displays the score.