Alex Freed wrote:
> 
> Great thanks to Glenn and Steven for the tech info on the Applicard.
> 
> It appears to be a very straightforward design and quite easy to
> reproduce with modern elements at a very low parts count:
> z80 CPU
> z80 CTC
> 128K x 8 static RAM
> PROM
> CPLD to take care of all the glue logic
> 
> Maybe an extra chip or two for clock generation, etc. It can run
> at 10 MHz. The CPU is available in 20 MHz version, but not the CTC.
> Could be worked around, but will need more logic.

FWIW, the CTC was optional--I've never seen a card with it installed.
That suggests that very little software actually used it.

-michael

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