This is the best site by far I have ever found on the subject by a factor of 10.
Many examples are given both in asm and C for different micro computers including the
AVR PJRC Teensy that I am using on the ignition board as well as the FreeScale
processor used in the megasquirt.

http://www.scriptoriumdesigns.com/embedded/interrupt_examples.php

Somebody put a lot a man hours into this site.

Paul Lamar
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