On Oct 1,  2:01, Tony Duell wrote:
  > Sure you're not thinking of a Z80?  The
standard speed for the original 
Z80
   parts was
2.5MHz (4MHz for Z80A and 6MHz for Z80H). 
 Just a minor correction. I believe the Z80B is 6MHz and the Z80H 8MHz. 
 
SGS-Thomson list them as 6MHz and 8MHz now, but IIRC the Z80H was
originally 6MHz.  I could be mistaken, of course.
--
Pete                                            Peter Turnbull
                                                Network Manager
                                                University of York