Tony Duell wrote:
   Ooh - you
don't see many Atoms using the expansion bus for System cards (with
 the exception of the Disc Pack). 
 I think one of my other Atoms has one of the lab I/O cards mounted
 inside, connected to the system bus. 
 
Didn't come from Cambridge uni originally, did it? :-) I had two from there on
the bench just before I left for the US; both with lab interface boards
mounted in the bottom of the case. It's the first time I'd seen that actually
done, although I believe that somewhere Acorn do mention as a feature the
possibility of stuffing a System board in there...
(Annoyingly both machines originally had Econet boards fitted apparently, but
they'd long since vanished from inside...)
cheers
J.