Hi Bryce,

Welcome to the PIC list!

Like Jinx said, I think you just need to reload the counter directly.
Do it as soon as possible after the interrupt to minimize timing
errors. TMR1 increments at 1/4 Fosc, with 20MHz XTAL that's
5MHz so you should be able to get 200ns resolution. Don't know
how much to allow for interrupt latency. Try some code like this:-

interrupt void int_routine(void){
  if(TMR1IF){
    TMR1H = 0xEC;
    TMR1L = 0x77;
    TMR1IF = 0;
    count++;
  }
}

Brent Brown
Electronic Design Solutions
16 English Street
Hamilton, New Zealand
Ph/fax: +64 7 849 0069
Mobile: 025 334 069
eMail:  brent.brown@clear.net.nz

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