On Thu, 26 Sep 2002 20:20:24 +0000, John <tgbpoi29@SDF.LONESTAR.ORG> wrote: > >Z80 2.5 MHz >Z80A 4.0 MHz >Z80B 6.0 MHz >Z80C 4.0 MHz CMOS >Z80H 8.0 MHz > mmh, i was using Z80H based multi-user machines (!, running OASIS/TheOS) from IBC back in the early '80s, which clocked at 10MHz.... Ralf