微机原理及接口技术\实验五 中断特性及8259应用编程实验:当无中断请求时，执行主程序，延时显示“main”，若有中断请求，则执行其中断服务程序，显示该中断号“6”或“7”：若正在执行较低级的中断服务程序，则允许比它优先级高的中断被响应（IRQ6＞IRQ7）。主程序在执行过程中，每显示一个“main”，空一格。-Microcomputer Principle and Interface Technology \ test five properties and 8259 interrupted application programming experiment: When no interrupt request, the implementation of the main program, delay shows that " main" , if so, interrupt request, then the implementation of its interrupt service routine, showed that the interruption of its " 6"　or " 7" : if it is the implementation of low-level interrupt service routine, it allows high-priority than it was in response to the interruption (IRQ6>　IRQ7). Main program in the implementation process, each display a " main" , a space.