运用8255，8253芯片设计交通灯控制程序，8255的三个口分别控制红黄绿灯，8253控制变换时间-8255,8253 chip design to use the traffic light control procedures, 8255, respectively, to control the mouth of the three yellow green, 8253 Transform time control

微型计算机课程设计，通过8253、8255A与8259A芯片实现模拟交通灯-Micro-computer curriculum design, 8253,8255 A through 8259A chip simulation with traffic lights