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.