The 16f87x series allow the running program to overwrite program memory. You might start with those datasheets and check out a few of the "bootloader" programs that use this feature. ----- Original Message ----- From: Carlos Ojea > Hello: > I want my pic to switch between 3 different programs saved in a eeprom. > To do this I was thinking in (perhaps) microprocessor mode. > Where can I find huge information about this mode? > Thanks, > Carlos -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.