Silly random thought. IIRC, there's an empty 40 pin DIL socket on the ACW
coprocessor board, and I think it's on the 32016 sencond processor board
too (I must come and collect that from you). Wasn't that for an MMU chip?
Yep, you're right (about there being empty sockets on both versions of
the board). I suppose it's logical it'd be an MMU chip given that
there's no other connectors to the board (e.g. it's not for an optional
serial chip or whatever).
I've checked my ACW schematics, and it is for an 32082 MMU chip.
My guess (as this wasn't used by PANOS) is that it was intended to be
used for some never-released multitasking OS, probably a unix
derrivative.
-tony