Yeah, it was a PC clone. What I'm not sure of is the name of the chip and/or the company that made it. I am positive it was not a NEC chip though. The Z80 sounds vaguely familiar. I do remember that the chip was faster than a comparable Intel chip. 4.77 vs 8 MHz? 8 vs 10 MHz? You know your getting old when you can't remember what you once used for bragging rights.