DW11-B (was Re: VS11)

[Tony Duell]

> I have a DW11  w/DDV11-CK for an "IB11" (IBV11 for Unibus).  It came

Was the genuine IB11 a normal Unibus card? I've never seen one, I have 
several IBV11 cards in MINC machines. I pulled the processor and RAM out 
of one of the MINCs and hung it off a Unibus machine using (not 
suprisingly) a DW11-B. I can confirm it works fine.

I once worked on something called a 'Gamma 11', which was a medical 
imaging control system. It consisted, IRIC, of a PDP11/34 CPU with a VS60 
board set in the CPU cabinet. That was linked by a Unibus cable to a 
5.25" expansion box containing 2 4-slot backplanes. One was the normal 
Unibus, and contains an RL11 and the Unibus half of a DW11-B. The other 
was Qbus, it cotnained the other half of th DW11-B and some special 
interface cards to the imaging camera, etc. 

Alas I never got to investigate the 'interesting bits. I just had to fix 
a simple fault on the RL11.

> with an 11/34 from a University setting (thus the DD11V-CK backplane).
>  I've thought about using that with a Qbus SCSI card, but haven't
> tried it yet.

I see no reason why it wouldn't work. Certainly the DW11-B supports NPR 
transfers -- I've run Unibus 11's with RL drives hung off an RLV11 (with a 
DW11-B linkling them).

-tony