计时器Timer0的溢出中断控制：使用8051的P1连接到一个共阳七段显示器，然后利用计时计器Timer1，让8051在指定的时间间隔内显示出0~9。-Timer0 overflow interrupt timer control: the use of 8051 a total of P1 is connected to a Seven-Segment Display Yang, and then use time keiki Timer1, so that in 8051 within the specified time interval shows that 0 ~ 9.