Changing PreScaler during interrupt

[skimask]

I am using a F737 which shares the pre-scaler between the Watchdog and TMR0.....................
I was thinking Pre-Scaler meant the ratio rather than the count. Looks like it should work. Might be time to break out the breadboard and see what happens...
bill

Yep, same deal with the 18F4620, and probably most other PICs. I think you got the picture.