On Mon, 15 Dec 1997 19:33:10 -0700 Dwayne Reid <dwayner@PLANET.EON.NET>
writes:
>  As far as RA4 and higher voltages is concerned, a Microchip FAE > has
repeatedly told me that it is OK up to about 14 Vdc.

Doesn't this risk putting the chip into the (undocumented) test mode?  It
does on a 16C5X.  The "absolute maximum rating" is indeed 14V, but the
chip may not work properly there.