Hi again, I ordered the Microchip full-line databook from Digi-Key (probably a stupid move, since you managed to get the other databook free). I'm not sure what year it is, but it's got all the current PICs in it as well as all (I think) of uChip's other stuff. Building a programmer for the '84 isn't too bad, actually; You can buy the necessary hardware and an '84 for around $15. As for the program, I've got one for DOS that I hacked up from two other programs; you should just have to change the functions for dealing with the parallel port on the Mac. Let me know if you're interested, and I'll stick it in my public directory. Chris -- Chris Leger (blah@cmu.edu) Carnegie Mellon University Field Robotics Center