i looked at my 16c5x book and it have 9 bits to set for code protection. who knows what happens if all nine are not set? i must have thought it was odd not to protect the first 64 locations because i put a big red star in my manual next to this section. michael -----Original Message----- From: Morgan Olsson To: PICLIST@MITVMA.MIT.EDU Date: Thursday, March 26, 1998 3:11 AM Subject: Re: 12C508 Code Protection >The first 64 locations can be read regardless of the >code protection bit setting. Is it the same for all PIC:s? Oops! don4t put secrets there... /Morgan / Morgan Olsson, MORGANS REGLERTEKNIK, SE-277 35 KIVIK, Sweden \ \ mrt@iname.com, ph: +46 (0)414 70741; fax +46 (0)414 70331 /