First, please change your email settings to not insert a REPLY-TO address so
that the default reply goes to the list.  Many people here, including me,
don't want to waste time writing a reply that only one person reads.

> I am new to PICs and I need help in a project of mine. The PIC16F84 that I
> was using is exhibiting some erratic behavior.

By the way, the 16F84 if obsolete.  The 16F628 does more and costs less.

> I loaded a program that I
> wrote that toggles the state of RA0 every second using the TMR0 timer. I
> have seen this program work before (it was my first PIC program) but it
does
> not toggle RA0 at a steady rate like it used to. I suspected the
oscillator
> (32.768 kHz)considering it looked like a timing error, but a test with the
> digital multimeter proved me wrong. As a test I loaded another program
that
> toggles the state on RA0 every time RB0 is pulled low. Sometimes it does
not
> change states and other times it changes without pulling RB0 low. Are
these
> symptoms of a bad chip? Any help would be appreciated.

Is the watchdog timer enabled perhaps?


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