> Didn't some of the 'A' model chips shuffle the config bits around, or > reverse their polarity? I seem to recall seeing something to this > effect somewhere. You are thinking the difference between 16C84 and 16F84? Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: www.voti.nl consultancy, development, PICmicro products -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads