CP-M Z80 home brew computer circuit board

[Allison]

Eric J Korpela wrote:
> On Mon, Jun 16, 2008 at 1:58 PM, Eric Smith <eric at brouhaha.com> wrote:
>
>   
>> With a Z80 a typical read transfer loop takes a minimum of 52 clocks,
>> which on a 2 MHz Z80 meets the requirements for all but 8" double density,
>> which requires a faster processor, DMA, or special tricks.
>>     
>
>
> Having missed the first part of this discussion, are we limiting ourselves
> to a Z80?  If not, I'd nominate a Z80A or Z80B.
>
>   
for the discussion there is minmally z80a (2.5mhz) for timing for FDC loops.
The faster 4,6,8 and 10mhz parts can solve the issue with brute force speed.

Allison