Hopkins wrote: > > Can anyone show an example of how to set the __CONFIG bits in > a PIC 18F452 Hi. The __CONFIG symbol is set in the assembler source code The "config bits" are then transfered to the HEX file by the assembler and lastly from the HEX file the the PIC by the programmer tools. What, more specificly, is the problem ? What development tool(s) are you using ? The PIC *itself* doesn not know anything about something called "__CONFIG"... Jan-Erik. -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads