7279键盘程序 设0--9数字键，A--F功能键

开机时在最高位显示‘P’

第一次按数字键在最高位显示数据，第2次按数字键在最次位显示数据，。。。。。。第8次按数字键在最低位显示数据

第9次按数字键在最高位显示数据。。。。。。按任意功能键则系统回到初始状态。-7279 keyboard program for 0- 9 numeric keys, A- F function key boot-up at the highest digital display　P the first time by the number keys at the highest bit display data, the 2nd according to the number keys in the second digital display data. . . . . . 8th Press the number keys at the lowest bit display data 9th Press the number keys at the highest bit display data. . . . . . Press any function key while the system back to initial state.