Em 11/6/2010 19:29, RANDY ABERNATHY escreveu:
> I would say chip to chip since I have  been reading the old PIC with my p=
rogrammer then inserting another and attempting to burn it.  I know that no=
rmally, when a PIC is protected you usually show all FFFF in the memory and=
 the protected chips I do have show exactly that, however this one does not=
, it has different HEX data in each address location which leads me to thin=
k it truly isn't protected.  The person that sent it to me said it wasn't. =
 It is from a rather old controller that operates a heater, fan, etc. and h=
e couldn't find any of the actual source code left in his files.  Which doe=
sn't surprise me.
>   =



By my experience, PICs read all FFs when erased and all 00s when protected.
Make sure you aren't reading an erased chip (or perhaps you erased it by
accident while messing around with your programmer).

Best regards,
Isaac

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