How do interrupts work?

Question

Iron

Please explain on your fingers how software and hardware interrupts work

Answer 1

Software - just a call to a subroutine whose address is recorded in the interrupt vector table, only the stack is formed in a slightly different way.
Hardware is implementation dependent. On x86, EMNIP, a separate controller is used. The signal received from the device latches the corresponding trigger, the processor at a certain stage of command execution checks the status of all triggers in order of priority. When a signal is detected, the desired address is taken from the same interrupt table and the subroutine at this address is called. The interrupt routine must reset the flip-flop before it terminates so that the next signal that arrives can cock it again.

Answer 2

Very simple. Just imagine, you are a processor, sitting at home, minding your own business. Suddenly, bam! interruption - your son's class teacher calls you and asks you to go to the director of the school tomorrow. We have to put this task in the queue for execution :-)

Answer 3

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