可編程并行接口８２５５Ａ完成的交通燈實驗 用８２５５Ａ的Ｂ端口和Ｃ端口控制１２個ＬＥＤ的亮和滅（輸出為０則亮，輸出為１則滅），模擬十字路口的交通燈。 -programmable parallel interface 8255a completed, the traffic lights experimental 8255a port B and C - I control 12 LED bright and methomyl (output of 0-liang, the output of an anti), the simulation of traffic lights at a crossroads.
