Description: The design uses 8253 electronic clock timer with interrupt timer, display and keyboard for the button to amend the 8255 parallel port to control the LED digital tube scan system made of hex a 24-hour electronic clock or watch. Experiment 3 (timer), experimental (interrupt), experiment (parallel port keyboard), seven-segment LED display circuit principle diagram, interrupt programming to complete the design of an electronic clock or watch.
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lab9.asm
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