RETLW is an opcode meaning return with a literal in w. To change the literal value you have to change it in your program and reprogram the chip. Modify window is to change the value in RAM registers, not program memory. No stopwatch in ICD, only MPSIM. -- Quentin qsc@iptech.co.za www.iptech.co.za -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads