The smaller PICs (12c508, 12c671) have a pin that can be set up as MCLR or an input. What I'm looking for is a directive to CCS C to tell the compiler I want to use it as MCLR. The datasheet tells which bit in which register to use but I'm looking for the high-level language equivalent of the same thing. I'm not even sure how I'd specify this if I were assembling from MPASM. The broader question of course is where I would look this up -- I have lots of books and I can search for "configure" "MCLR" "GP3" and "PIN_A3" but every hit I get is talking about something else. (And Deja News is down because they were assimilated by Google and they're "Improving" the interface(!) (And the piclist archive search and I still haven't formed a meaningful relationship) Barry -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.