plus the clock frequency is 2MHz, produces a square wave by 8253, and light-emitting diode in accordance with 1s, flash off intervals of 1s. Draw the circuit, according to the requirements of programming, under simulation debugging environment.

8253.asm
8253.exe
8253.obj
实验五 可编程定时计数器8253实验.doc
实验五 可编程定时计数器8253实验.DSN
实验五 可编程定时计数器8253实验.PWI

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