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8255的汇编程序,各种工作方式尽有,是初学者学习的好帮手,也是利用8255扩展IO的普遍方法,只用改下地址直接拿去用就行-8255 compilation of procedures, a variety of working methods have to do is a good helper for beginners to learn, but also the use of 8255 to expand the universal method of IO only change taken directly under the address used on the line