Cherry, Mark wrote:


> Now, the "problem".  When I bring MCLR low to reset the chip,
> the display will usually show erratic values.

While MCLR is low, or after returning MCLR high ?

> If I power
> down the test board, it will power up with the usual erratic
> values, although EEprom holds the correct values.

Do you have any code to init the display at
power-up or reset ?

>
> I have been checking, but haven't found what I might do to
> ensure that PORTB is "clean" to accept the EEprom values at
> restart time.

I'm not sure what "clean" means here. You mean "set up"
correctly ?

When does it run correctly ? Or doesn't it run correctly at all ?

Jan-Erik.

PS.
Get yourself a couple of modern PICs and you'll probably
save yourself some troubles....

--
http://www.piclist.com hint: The PICList is archived three different
ways.  See http://www.piclist.com/#archives for details.