Proteus仿真51单片机中断优先级实验,外部中断0使用低优先级，外部中断1使用高优先级 在中断服务子程序使用不同的工作寄存器组.-Proteus simulation 51 the microcontroller interrupt priority experiments, external interrupt use of low-priority external interrupt high priority　different register set in the interrupt service routine.