本程序是用汇编语言编写的，倒计时剩5秒时黄灯闪烁警示（交通灯信号通过PA口输出，显示时间直接通过8255的PC口输出至双位数码管）；车辆闯红灯报警；绿灯时间可检测车流量并可通过双位数码管显示。-This program is written in assembly language, countdown 5 seconds when the yellow light flashing warning (traffic light signal through the output port PA