Cromemco 64KZ Info Needed

From: Mike Davis <>
Date: Wed Aug 21 23:54:01 2002

Hope this is not a duplicate. The first one did not show up.

I have just obtained a Cromemco 64KZ board. This has 64K of RAM and
I'd like to test this out this weekend. Unfortunately, I don't have
any documentation.

There are 4 banks of RAM (16K x 8) Each bank is labeled "page0",
"page1", "page2" and "page3". There are also 3 8-pin dip switches:

I have a couple of photos at:

Since this is a 64K board and since there is other memory in my
system. I'm hoping this allows some sort of bank switching. But
without docs, I don't know how to use it.

I assume the Bank A/B allow setting which bank a particular 16K might
reside but am not sure. And the address lines of A15, A14 are a

Is there a way to switch banks by writing to an I/O port? Location?

Can any of you help with an explanation how this works and how I might
use the switches?

Thanks in advance,

Received on Wed Aug 21 2002 - 23:54:01 BST

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