Hi, Wassup

As Timer 0 is a 8 bits timer ... and we suppose clock is 4Mhz ( ... )

I will be necessary to have a counting loop in the interrupt stub , because interrupts will occur every 256 µs as a maximum

The other solution is to use Timer 1 that has a 16 bits counting range ... and won't need any calculations.

Have a SEARCH for "PicMultiCalc" from Mr E. it's a nice tool to help for Timer designs ...

Alain