Hi Henrik,

Thanks for the program suggestion and detailed explanation of how it works.
Very nice and succinct code!

I would like to be able to capture events in the single digit millisecond region as a worst case scenario.
The XOR approach opens up more PIC options and I could use one with the fastest clock on offer.
Would you have any idea how long this subroutine would take to complete with a clock speed of say 32MHz or the shortest time achievable between captured events?

I have a bit of thinking to do before making a decision.

Thank you all for your valuable input to this project.

Cheers
Barry
VK2XBP