Just a small comment that might help you save some cycles in your ISR
routine.  Since you are only incrementing a counter, you can use "incfsz"
without saving anything else like W or STATUS.  See below.


>;****************         Interrupt routine
>******************;
>
>ISR
>         bcf    INTCON, INTF         ; clear interrupt flag for next time
>
>         incfsz   count_lo, f          ; increment low counter
          retfie
>         Incfsz   count_hi,f           ; yes, increment high counter
          retfie
          retfie
;; Note that you need the last "retfie" doubled at the end just in case
count_hi doesn't get reset when it should.

--Andrew



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