51汇编编程，实现四位数码管，在中断控制下，从0~9999循环计数-51 assembler programming, the realization of the four digital tube, under the interrupt control, cycle count from 0 to 9999

通过51单片机来实现中断功能，并用一位数码管显示其结果。-By 51 single chip microcomputer to realize the interruption function, and a digital tube display the results

外部中断数码管显示源代码，51的，直接就可以使用，初学者使用-External interrupt digital tube display source code, 51, can use directly, for beginners to use