Hi, I have ICPROG software and a JDM hardware to program a 16f84. I built a circuit that reads a RS232 and write the input to a LCD hd44780. I need to reprogram the 16f84 without moving the chip to the JDM and then back to the circuit. How can I implement a in circuit serial programing? Which software will I need? Thanks Miquel PD Excuse my poor English __________________________________________________ Do You Yahoo!? Send FREE Valentine eCards with Yahoo! Greetings! http://greetings.yahoo.com -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads