Owen Robertson wrote (in private e-mail to me):
  Well, I was hoping to find diagrams of a simple system
someone else had
 created, so that I could study it and get ideas. I was also looking for
 information on address decoding circuitry. 
The information I have is likely to be at the chip level rather than the
board level.  But I'll see what I can do.
I'm replying to the list because private mail to your From: address (univac
at earthlink dot net) keeps bouncing.
-- Derek