Quote Originally Posted by wmarchewka View Post
... My question is this: If i am in the INT0 routine and TIMER0 interrupts what happens? Does the TIMER0 interrupt stay flagged so that eventually it will get serviced? ...
Exactly! It will remain flagged, and cause another interrupt as soon as it exits the current one.

So it will be serviced ... Next.

My INT0 is set at HIGH, it is connected to a MCP2515 CAN controller (which is proving to be way more work than i hoped.)
I can only imagine the nightmares.
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