> -----Original Message-----
> From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On
Behalf
> Of Michael Dipperstein
> Sent: Friday, February 10, 2006 1:14 PM
> To: Microcontroller discussion list - Public.
> Subject: RE: [PIC] question from someone new to the list
> 
> > From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On
> Behalf
> > Of William Killian
> > Sent: Friday, February 10, 2006 8:44 AM
> >
> > I have the equivalent "stuff" here.  We have never seen the failures
> > here that happen in the casinos.
> >
> > I have a half dozen or more of the board that I can grab.  But they
> > aren't the one that failed....
> >
> > Shipping the whole slot back here probably doesn't make much sense.
> > Failure do not seem to be specific to the same cabinet over and over
> but
> > instead across a bunch of cabinets.
> >
> > In this case they are accommodating but so far I haven't proven
> anything
> > about what could cause the failures.  If I can't reproduce the
problem
> > it's a lot harder to fix.
> 
> I was just reminded of some brownout related problems that I had seen
a
> few years back.  Is it possible that the chip is experiencing a
> brownout?
> 
> They'll do all kinds of funny things under brownout conditions.
> 
> -Mike

My best guess is power issues.  BOR is set in the fuse word but if there
is a point where funny things can start happening before reset -
particularly if too much power is being sucked out the DIO ports drawing
down the voltage it could explain things.

I am learning more as I read the source.  Looks like it isn't EEPROM
after all.  The program reads the EEPROM values only at boot and writes
it only when commanded.  Otherwise it uses a RAM copy of the home
positions.




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