Shared IRQ and PIC

Shared IRQ and PIC

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Posted by Clifford96 on September 25, 2001 at 01:04:15:

Hi All,

I am a newbie in system programming under win95 environment. According to the document, IRQ can be shared among hardware interrupts, so how can CPU identify which I/O device issues the interrupt signal? Is there anything done in PIC chip to accomplish this task and send result to CPU?

Thanks for any hint!

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