"Frank Townsend" <ftownsen@nospam.net> wrote in message news:7zsVc.1605 > > The Zip Chip can be found at up to 8 mhz. However, even the 4 mhz > > version is rather rare, and never cheap. > But don't forget the RocketChip and RocketChip II with speeds up to 10 MHz ...though they were inferior.