Jules;
The SWTPC MPA2 CPU card is their second version. It added the sockets
you see along the top to permit using up to 4 2716 EPROMS to add permanent
storage. 8K BASIC was a popular choice. You'd need a bunch of other cards
to make a working 6800 system, however. If that's the only one you have it
might be better used for swap material.
Docs for many SWTPC boards are at:
www.swtpc.com
but not this one, I see. I can make a copy of my manual if needed.
Paul Pennington
Augusta, Georgia