Cromemco 64KZ Info Needed

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: http://www.msdsite.com/vcomp/cromemco/photos.html 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 mystery. 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, Mike