>Or if it's definitely not available, I'd like to know that too. Then I may >look into writing one. Any idea how similar the PIC code would be to one of >the existing bootloaders for the 16F877? Would that be a good place to >start? Microchip have an app note for a 16F87x/18F???? bootloader, along with a zip of the source code that they list. IIRC it also includes code to run under windows to handle the other end. Probably as good a place to start as any. Look for AN851. -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads