the k42 series smt module in gated counter mode would be an ideal thing for a tacho and probably a simpler set of interrupts to manage.great lets go.
its at this time you realize that pbp has no support for any pic hardware modules that did not exist at least 15 years ago, the last time pbp had a new command the space shuttles still flew.
so if you want to take advantage of the newer pic's powerful built in stuff you need to learn a whole lot of asm
stuff to prop it up. sadly pbp has become a real programming cul de sac. I put my time and effort into a better method mplabx and C and the wonderful MCC [microchip code configurator]. The real beauty of C is its cross platform compatibility, it opens up a whole new world.
but why not learn something new?
that's my new