Design issues related to interrupt-driven input

Design issues related to interrupt-driven input - output, Computer Engineering

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Q. Design issues related to interrupt-driven Input - output?

So interrupt handling includes interruption of currently executing program, execution of interrupt servicing program and restart of interrupted program from point of interruption.

Design issues: 2 design issues occur in implementing interrupt-driven I/O:

1) How does processor decide which device issued interrupt?

2) If multiple interrupts have occurred then how does processor determine which one to be processed first?

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