Saturn 128k Problems

[Steven Hirsch <snhirsch@gmail.com>]

Anyone have a schematic for the Saturn 128k ram card?  I'm trying to get 
RoboCAD going on my 2e and of course the memory expansion it requires doesn't 
work :-(.

When I run the RAMTEST128K program it fails immediately with a message that it 
cannot write memory after two pokes.  The Ram read LED (closest to the rear of 
the card) is stuck on.  Interestingly, the machine does not respond to a 
Ctrl-Reset (!) and must be power-cycled.  Never seen that one before.

I suppose I could start changing out LS TTL chips blindly, but wanted to see 
if anyone had experience with the card.

Steve