4 Replies - 1000 Views - Last Post: 09 October 2012 - 02:17 PM

#1 koricha  Icon User is offline

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operating system interrupts

Posted 07 October 2012 - 03:09 PM

What does it mean to "ignore" an interrupt?
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#2 Lemur  Icon User is offline

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Re: operating system interrupts

Posted 07 October 2012 - 03:20 PM

What does it mean to ignore anything?
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#3 tlhIn`toq  Icon User is offline

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Re: operating system interrupts

Posted 07 October 2012 - 03:25 PM

Do nothing in response to the event.

Kind of a "duh" question.
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#4 Skydiver  Icon User is online

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Re: operating system interrupts

Posted 08 October 2012 - 12:04 PM

Lemur and tlhIn`toq are quite correct in the general sense. I was under the impression that unless the interrupt flag is clear, "ignoring" an interrupt still requires work. Any registers that were pushed on the stack as a result of the interrupt still need to be popped off and put back into their respective registers, otherwise the stack will keep growing and the instruction pointer will not resume back to where it was prior to the interrupt. So "ignoring" an interrupt more often means acknowledging that an interrupt happened by virtue of doing some work to cleanup, but not actually doing any work to handle the event that the interrupt represents.

This post has been edited by Skydiver: 08 October 2012 - 12:34 PM

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#5 koricha  Icon User is offline

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Re: operating system interrupts

Posted 09 October 2012 - 02:17 PM

thank you Skydiver very helpful
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