UK PDP11 wanted

Johnny Billquist bqt at
Thu Apr 9 07:55:02 CDT 2015

On 2015-04-09 14:07, Noel Chiappa wrote:
>      > From: Pete Turnbull
>      >> Technically, that's an 11/83 CPU...
>      > Nope, it's only 15MHz ... and the MSV11-Q memory isn't PMI, so it's an
>      > 11/73.
> A discussion as to whether the addition of second board can change a first
> board from an A to a B would I suspect be non-productive, so I will pass over
> that point. :-)
> One thing that I am curious about is the 15MHz aspect: what did DEC (if you
> recall) call a 15MHz M8190 paired with PMI memory? (Recalling our prior
> discussion, which I am too lazy to look up and give a pointer to, about how
> all the M8190's can apparently do PMI.) Did they (or would they) have
> regarded that as an 11/83, or did only the 18MHz version get the 11/83
> moniker? (Too many different configurations - 15/18, PMI/non-PMI - and not
> enough names!)

As far as I know, any CPU with PMI memory would be called an 11/83, even 
if running that 15MHz.


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