> I overlooked that funny detail, used the 'useuall' procedure and I am
> programming 12F675's just fine. That's of course no proof that this is
> correct, but it is something...

I don't remember exactly which chip it was, but I do remember that the
Vpp/Vdd order mattered for it.  One of the symptoms was that the ID word
would sometimes come back all zero.  I experimented enough to see positive
evidence that the Vpp/Vdd order can be important.


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