How rare are these?
I stumbled on some information a week or so ago about a Centech z80 card for the //c, but since then can't find anything.
Do such cards come up for sale regularly anywhere, or are they mostly unobtanium? I know there's also an Applied Engineering one.
So apparently, Cirtech and Applied Engineering had CPM available for the IIc.
I've seen the first link, but had not seen the second.
I would love to get my hands on one, but I think for the //c they're not nearly as common as for 2e.
I also found this: http://john.ccac.rwth-aachen.de:8000/patrick/data/Z80in2c.pdf
but I would never know how to go about producing that part with the raw schematic.
Given the rarity of Z80 boards for //c finding
them will be hard enough as well as price.
There is a guy in Korea who currently designs boards and alike for
the ][ series who I would contact.
He has recently had a Mockingboard Clone for the //c.
Here is ebay link.
I would ask him to make you z80 board for the //c.
He is currently make Z80 cards for the ][, ][+, ][e and //gs (with blinding
speeds apparently). So I don't think a //c is that much of a stretch.