Can someone explain in a nutshell what is the advantage to the Harvard architecture? Or perhaps someone who's used other microcontrollers can give me some perspective on PIC advantages. (Don't want to start a flame war, though, so relax, everyone.) I am using PICs for a couple of projects (one of which works fine now, thanks to some list help, by the way) largely because someone whose opinion I trust suggested it last year, when I was young and impressionable. I've noticed, however, that *he* doesn't use them. -tom ---------------------------------------------------------------------- tomss at ids.net - 401-861-2831 - 42 Forge Rd, Potowomut, RI 02818 USA