Interrupt driven I/O transfer of micro-processor

Asked By anonymous 7060 points N/A Posted on - 12/08/2012

Describe the sequence of events that characterize the interrupt driven I/O transfer from point of view of: a) Processor b) I/O module (ISR)

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Answered By Kevinn Nicholas 0 points N/A #194925

Interrupt driven I/O transfer of micro-processor

 

Once the interrupt is activated, the microprocessor follows these steps.

1. It save the address of next instruction in stack and finishes the current instruction.
2. It also saves the current status of all the interrupts.
3. Jump to interrupt vector table that holds the address of ISR (interrupt serves routine).
4. Execute the interrupt until it reaches to RETI (return from interrupt)
5. The processor now returned to the location where it was interrupted. 

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• Posted on - 01/23/2013
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