FPGAs, unobtanium and FPJ11s

Pete Turnbull pete at dunnington.plus.com
Fri Nov 24 08:23:26 CST 2006

On 24/11/2006 13:13, Gordon JC Pearce wrote:
> The thought occurred to me that it might be nice to have the 
> floating-point option in my PDP-11/73.  Since I haven't got one, and 
> don't fancy paying the $500 or so that some online sellers seem to be 
> asking (do they really expect to sell *any*, never mind at that price?), 
> I was wondering how easy it would be to implement in an FPGA as was 
> discussed at length earlier in the week.
> Feasible, or a complete waste of time?

Is your 11/73 a KDJ11-A or KDJ11-B?  If the former, it may not be 
compatible with the floating point hardware anyway (M8192 without a YA 
or YC suffix).  Some early 15MHz KDJ11-B boards aren't either.


Pete						Peter Turnbull
						Network Manager
						University of York

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