用行列式按键产生 (接P2口),实现8位按键移位显示.开始时,8个数码管都不亮.按一个行列式按键(只用0----9),数字显示一位(如同手机输号码).数字输入8位后,只显示最近的8个数字.c51的汇编程序。。附protues仿真图-Key determinant generated by (pick P2 port), to achieve 8-bit key shift display. Initially, eight digital control are not bright. Pres