此为4*4扩展键盘程序，用的是atmega128开发板-This is the expansion of 4* 4 keyboard procedures are used ATmega128 development board

电脑维护大全。。。 电脑故障维护大全目录 1楼：主板故障 2楼：显卡故障 3楼：声卡故障 4楼：硬盘故障 5楼：内存故障 6楼：光驱故障 7楼：鼠标故障 8楼：键盘故障 9楼：MODEM故障 -Computer maintenance daqo... Computer breakdown maintenance daqo directory 1 floor: mainboard failure 2 floor: video card fau