这是一个汇编程序，利用8259实现中断管理控制，其中7个开关为中断源，出发七个中断，中断服务子程序的功能是点亮相应位的LED指示灯。-This is an assembler using the 8259 interrupt management control switch 7 interrupt sources, starting seven interrupt, the interrupt service routine is lit the corresponding LED indicator bit.