Unknown CDC unit , looks like a drum memory ?

Jon Elson elson at pico-systems.com
Wed May 16 21:25:56 CDT 2018

On 05/16/2018 11:13 AM, jos via cctalk wrote:
> Visited an older collector recently, and in his shed he 
> has a strange thing, labeled CDC, that somehow looks like 
> a drum memory, but then again not ( drum looks too small 
> to be usefull )
> The controller that goes with is  a transistor based  
> monster on countless small pluginboards.
> Pictures on  ftp://ftp.dreesen.ch/Unknown_CDC_Stuff
Yes, it is a drum, for sure.  Seems to have a LOT of heads.  
The controller may be a regular disk controller, or can be 
used with both.  I noticed an "on cylinder" light on the 
panel.  But, it should be pretty easy to repurpose a disk 
controller to handle a head-per-track drum.


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