Brad Pousland <PICLIST@MITVMA.MIT.EDU> wrote:

> Trying to impliment interrupt on change service routine.  This
> routine takes control from a loop that is timed with tmr0.  Every
> time a portb input pin goes from low to high, the tmr0 controlled
> loop goes faster.  Is the tmr affected by such load variances?

Brad:

No.  The problem is undoubtedly in your code.  My guess is that
you're either:

1.  Failing to check/clear the interrupt flags, or
2.  Failing to properly save/restore the W and STATUS registers in
    your interrupt service routine.

-Andy

Andrew Warren - fastfwd@ix.netcom.com
Fast Forward Engineering, Vista, California
http://www.geocities.com/SiliconValley/2499