Forcing a new address you mean to jump to (as in the code is already stored in the flash) or updating a piece of the flash via the RS232? sounds like a bootloader of sortss dgdg ghhghg wrote: Is it possible to send a function to a 18fxxxx pic, what I mean is that I can send the function by rs232, then I want the pic to jump to it, so there is a need to write the ram data to rom so that I can jump into it, has anyone done something like that? Thanks. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist