Simulated disk drive for RT-11? - test-drb@ccmp.vtda.org

6 Jun 2005

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Subject: Re: Simulated disk drive for RT-11?
   From: David Betz <dbetz at xlisper.mv.com>
   Date: Mon, 06 Jun 2005 15:24:52 -0400
     To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at
classiccmp.org>

Is there a description somewhere of all of the BA11-?? variants? It 
seems that there are many of them and they are of various sizes and 
shapes. In fact, I think that the cabinet my 11/23-AH is mounted in is 
a BA11 of some sort (a BA11-AH maybe?) but it is nowhere near as small 
as this BA11-VA that you describe. I've found various lists of QBus 
modules on the net but no list of the various boxes that DEC produced. 
Can someone point me to one? 
Don't know of one on line.  I have the set "LSI-11 Systems Service 
Manuals" as my reference.

...
 And, I'll repeat my question, does anyone have one
of these small -11 
QBus boxes they'd like to sell or trade? It seems that the BA23 might 
be a good choice as well.

Thanks,
David 
Basically all of the BA11 boxes are rack sized and vary only in power
supply, backplane configuration and some variation in front pannel.

The BA-11-va is one of a few small boxes.  Another choice is the BA23
in the floor standing case.  

Actually a BA11 rack box is only twice the size of the BA11-va and 
can be used as a desktop case.  I've done this with the drives just 
sitting on top stealing power from the BA11 supply. The options of 
such a configuration are much greater due to larger backplane.  I've 
seen one such done this way with a wood (Plywood) case surrounding a
BA11-N and twice the height to allow a floppy and a RD52. Much 
smaller than a rack and still very useful.

Allison