Interface I/O address decoding experiments 鈶? when elected to the address 2A0H, LED lights, and delay 鈶? elected when the address 2A8H, LED lights dim, and delay 鈶? if any key is pressed, the program exits Otherwise, the process cycle continues

实验二（2）.txt
实验二（3）.txt
实验二（4）.txt
实验一.txt
接口实验一实验二.ppt
实验二（1）.txt

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