Description: 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.
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