文件名称:cx
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8255扫描键盘、显示程序 A- a^n18
利用8255可编程并行口做一个扫描键盘实验，把按键输入的键码，显示在由8279控制的七段数码管上。
8255PA口做键盘输入线，PB口作扫描线。-8255 scanning keyboard, display program A-a ^ n18 programmable parallel port to use 8255 to do a keyboard scan experiment, the button input keys code, displayed in the control of the team respectively by 8279 digital tube. 8255PA I make the keyboard input line, PB mouth for scan line.
利用8255可编程并行口做一个扫描键盘实验，把按键输入的键码，显示在由8279控制的七段数码管上。
8255PA口做键盘输入线，PB口作扫描线。-8255 scanning keyboard, display program A-a ^ n18 programmable parallel port to use 8255 to do a keyboard scan experiment, the button input keys code, displayed in the control of the team respectively by 8279 digital tube. 8255PA I make the keyboard input line, PB mouth for scan line.
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cx.txt