> I've got one for you: Not all of the parts start the program memory at > the same spot. AFAIK (but correct me if I am wrong!) all (12 and 14 bit core) pics start at 0, except the ones that have an internal osc start at the highest instruction and wrap around to 0, so for practical purposes (and if you don't use the highest instrcution!) they can also regarded to start at 0. Interrupt starts at 4. Now the SX is a bit special, for it starts at the highest instruction, but interrupt starts at 0. Wouter -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads