Unusual CMD SCSI thing... Anyone know what this is?

[Dave McGuire]

   That would be surprising, as the PCB photo shows 53C90Bs on both 
sides.  Can the 53C90B be coaxed into doing DSSI?  If so, I wasn't aware 
of it.

            -Dave

On 3/27/11 10:16 AM, David Barnes wrote:
> Yupper... worked with em years ago on a Vax 4000/700... SCSI to DSSI adapter... I had 7 drives and this unit in a tower box and it attached to the Vax via DSSI... pretty cool unit.
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> On Mar 26, 2011, at 3:04 PM, Mr Ian Primus wrote:
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>> So, in a recent pile-o-stuff, I acquired this SCSI box. The box itself is a generic two bay SCSI enclosure, but inside is mounted some kind of bus interface devices. It's a single circuit board, on a frame that mounts in a half height 5 1/4" bay. The face has a little two line LCD, and some buttons and lights. The board itself is made by CMD. Seems to be model CSB-2200/SDS.
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>> The board has what appears to be a SCSI input, and two SCSI outputs. The board contains three NCR 53C90B SCSI chips. Powering the device up, it announces itself as SCEA/S on the LCD.
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>> Now, from fiddling with the thing, and looking at what it contains, it *appears* to be some sort of SCSI-SCSI bridge, communicating with two separate busses, and allowing one external bus to use them. But I don't know. Searching on the model number have failed to turn up a manual. Searches for SCEA/S invariably turns up articles about various lawsuits that Sony Computer Entertainment of America have filed against their customers for using devices they purchased in ways that Sony doesn't like.
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>> So. Any ideas? I took some pictures:
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>> http://i.imgur.com/o9X6s.jpg
>> http://i.imgur.com/TzV67.jpg
>> http://i.imgur.com/SQN0b.jpg
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>> -Ian
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> David Barnes
>
> davebarnes AT roadrunner DOT com
> OpenVMS  , Tru64 , Solaris , Linux , OS X , SGI Irix
> 'Making a movie is like asking a question, and when you finish, the movie itself is the answer.' - Francis Ford Coppola
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-- 
Dave McGuire
Port Charlotte, FL