Thanks! So, I guess Enhanced really does have a meaning. I'm also theorizing that a chip may have to have eeprom to be able to program its own flash since programming flash uses the eeprom control registers. That's how I first noticed problems with the 18F4610. I could not find those registers! A couple people on the Microchip Forums suggested the 18F2620. Looks like I can just drop that chip in and get it to bootload. THANKS! Harold > Microchip do not make it very clear in their selction tables, but you need > to look for "Enhanced > flash" rather than "Standard Flash" - Enhanced means it can do self > programming and LVP. > This is further confused by some errors in the tables - e.g. 18Fx52 is > incorrectly listed as > standard flash. > -- FCC Rules Updated Daily at http://www.hallikainen.com -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist