Interrupt handling - computer architecture, Computer Engineering

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Interrupt handling:

Handling Interrupts

Several situations where the processor should avoid interrupt requests

Interrupt-enable
Interrupt-disable

Typical scenario

Processor interrupts the program being executed
Device raises interrupt request
Processor disables interrupts &acknowledges interrupt
Interrupt-service routine executed
Interrupts enabled & program execution resumed

A corresponding circuit for an open-drain bus used to implement a general interrupt-request line.

1676_Handling Interrupts1.png

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