Simulated disk drive for RT-11?

[Allison]

>
>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