I have a client who desperately wants to use the lower voltage capability of the L series (3.0V to 3.9V) but also needs to run at 4.9152Mhz. (I think because he has 900 crystals in stock and it would cost him to have the code modified for a 4MHz crystal). Does anyone know what would go wrong with the processor at 3.0V and 4.9152MHz? It's out of spec for speed but not voltage. Obviously the oscillator is still programmed for XT mode not HS mode. Thanks, John Dammeyer -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.