ISO: Manual or information on 3M DCD3-30 tape unit

Chuck Guzis cclist at
Tue Dec 15 17:43:44 CST 2009

Anyone have any information for this early QIC drive?  Model DCD3-
30/90.  The controller board is pretty simple--just some 7400 series 
TTL, made by Solid State Systems.  The most complex IC is an AM27S21 
1Kbit bipolar PROM.  There's a 220/330 terminator pack near the 50 
position header, if that's any help.

Is this a QIC-36 interface drive (50 pin header on the controller 


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