> I'm building a PIC circuit to interface to a very old computer that uses
> 0v for "1" and -10V for "0".
> (http://www.youtube.com/watch?v=8EKBNfm5B4U)
>
> It will make for simpler interface circuits if I run the PIC from 0V and
> -5V.  (I.E. 0V on Vcc pins and -5V on Gnd pins).
>
> Are there any issues with doing this ?
>
> PeterO


I don't see any issues. The PIC doesn't know or care where ground is. Just
make sure all the connected circuitry agrees, such as debuggers and
programmers.

Harold

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