Hi, I have the manual about C18 compiler but it is so terse. Could you please give me some suggestion how I can implement interrupt in PIC18F using C18 C. Thanks in advance! Luke -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads