Nova 4/C Questions

[david_comley at yahoo.com]

I'm assessing a pair of Nova 4/C chassis that I have had for a few months. One of the units has a CPU but no memory; the other has a MOS memory board but no battery backup unit.

Can anyone tell me whether older Nova core memory is compatible with the 4/C processor (I suspect not), and whether the battery backup unit is required for the memory to operate, or whether it was just sold as an option ? I think the wiring is there for it in the chassis.

My notes and some photographs are online at 
http://comley.us/browse.php?&action=show&artefactID=1054

Thanks,
-Dave