CP-M Z80 home brew computer circuit board

Eric J Korpela korpela at ssl.berkeley.edu
Thu Jun 19 12:42:32 CDT 2008


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.



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