Thanks for your help with my project, it is now almost complete and working well enough.
In the end I didn't use an Interrupt Handler, just counted until intcon.2=1, fairly accurate for what I want, about +-0.02%, according to my real time clock.
I've packaged the result as a demo, hoping to strike up some interest with a few of my chums...you never know?
Rgds
Mike
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