PDP 11/40 Unibus termination query...

Dave McGuire mcguire at neurotica.com
Thu May 21 14:02:35 CDT 2009

On May 21, 2009, at 2:35 PM, Tony Duell wrote:
>>> I think they are great, but I understand why we went with cheaper  
>>> ones
>>> (no silk-screen, for example).  I still wish we'd added some jumper
>>> pads to allow us to flip them from Unibus to Qbus grant cards, but
> IIRC the FPF11 (floating point board for the 11/23 and 11/24) has that
> feature.

   In fact it does.  I used to have two of those boards about twenty  
years ago, and now I can't find either one.  I'm rather pissed about  

> Some years ago I was given a box of mostly home-made grant cards. The
> home-made ones turned out toe be dual-height prototyping boards  
> with links
> soldered between the pins. You can guess what I did with those :-)



Dave McGuire
Port Charlotte, FL

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