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来源:互联网 发布:c语言中文网资料云 编辑:程序博客网 时间:2024/05/16 02:29
A CPU without an interrupt pin has been compared to a telephone without a bell.
A processor with a one-at-a-time interrupt policy can be like a household with a single, occupied bathroom.
Since the processor has its guard down, the interrupt controller must not let every incoming interrupt pass through. Otherwise, the ISRs(Interrupt Service Routine) could play ping-pong with the processor.
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