> I'm a bit stuck on how to sort out the 16f87x's though. I'd prefer to buy something not too expensive, but if I gotta do it myself, so be it. I'm thinking of something like Wouter's Wisp628, but with a 16c745 instead of a 16f628 in it. I know one client of me uses a Wisp628 with a standard USB-to-serial on OS/X. XWisp ran find after some fiddeling with the name of the serial port file. Or you could build your own adapter with an FT232BM chip. Personally I stay away from anything non-flash because I always need a few iterations to get verything right, so using OTP components would be expensive, and using /JW's very tedious (and I Wisp628 does not program them!). And you would have to write your own driver at the PC side, and you would have to do work again every time I update the firmware. anyway, succes! Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: www.voti.nl consultancy, development, PICmicro products -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.