基于Proteus的8086与8255仿真实验
（1）基本输入输出实验。编写程序，使8255 的A口为输入，B口为输出，完成拨动开关到数据灯的数据传输。要求只要开关拨动，数据灯的显示就发生相应改变。
（2）流水灯显示实验。编写程序，使8255 的A口和B口均为输出，数据灯D7～D0由左向右，每次仅亮一个灯，循环显示，D15～D8与D7～D0 正相反，由右向左，每次仅点亮一个灯，循环显示。(Simulation experiments of 8086 and 8255 based on Proteus

(1) basic input and output experiments. Write a program, so that 8255 A port for the input, B port for the output, to complete the dial switch to the data lamp data transmission. As long as the switch is toggle, the display of the data lamp will change accordingly.

(2) water lamp display experiment. Programming, 8255 A and B ports are output, data lights D7-D0 from left to right, each time only one light, circular display, D15-D8 and D7-D0 are opposite, from right to left, each time only one light, circular display.)