> Now, reading all 1s suggests a stuck pin or other short, but these
> other units apear to be sending the ID back shifted one bit to the
> left. Has anyone seen that before?.

That reeks of clock problems. A small series resistor (47 ohm?) and/or a=20
small capacitor at the target chip (22pf?) might help.

> Any suggestions would be apreciated, but I have at least one specific
> question: Is an oscilator on the PIC neccesary for programming? For
> reading the Device ID?

definitely not (twice).

did you ground the LVP pin? is your power OK and decoupled?

--=20

Wouter van Ooijen

-- -------------------------------------------
Van Ooijen Technische Informatica: www.voti.nl
consultancy, development, PICmicro products
docent Hogeschool van Utrecht: www.voti.nl/hvu

--=20
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