Description: 8253 programmable timer/counter experiment 1. Learning 8088/86 and 8253 as well as the connection method 8088/8253 of 86 pairs of control methods 2, learning 8253 programmable timer/counter timing methods. Tandem achieve a large time constant timing methods 3, to understand computer sound principles 4, more familiar with the timer programming methods 5, further familiar with the keyboard scan circuit works and programming methods
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