Unix on BBC micro with 16032 coprocessor

[Tony Duell]

> 
> Tony Duell wrote:
> >>>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. 
> 
> Funnily enough, mention of that socket just cropped up on the BBC list, 
> and someone remembers their father working on one of these boards with a 
> floating point unit fitted into that socket via a small daughtercard. 
> They're willing to admit that they may be misremembering though!
> 
> Would that be a possibility though, or is it definitely an MMU socket?

The scoket is certainly for an MMU chip (32082). It's the right pinout 
for that. I seem to rememebr there's some timing-fix PROM/PAL that goes 
with it, but I can't be sure (and I certainly don't have the contents of 
said device)

That said, I think it would have been possible to make a daughterboard 
with the FPU chip (32081 IIRC) on it. There may have been the odd extra 
signal you'd have to pick up with a kludgewire, but most of the ones you 
need are on that socket. So the story you heard might well have been true.

-tony