Using timer 8253 and extended keyboard display module to realize clock display and time setting function: 1) the clock display content is "minute: second", "MM.SS"; 2) P key is used to start the clock setting. Through the digital modification time on the keyboard, the parameters are in the flicker state during the modification process and the scintillation frequency 2Hz

Filename	Size	Update
微机原理.docx	31131	2018-03-28

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