Unknown CDC unit , looks like a drum memory ?

Al Kossow aek at bitsavers.org
Wed May 16 12:00:50 CDT 2018

On 5/16/18 9:13 AM, jos via cctalk wrote:

> Anyone can identify this ?

if you look on bitsavers under cdc/catalogs M90310500_Internal_Literature_Catalog_Jul75.pdf

lists several drum storage units including the models 861, 863 and 865

the controller looks a little too early to be for the BG504A
the one you're trying to identify looks to be using 1604/160 series modules

39731700A_BG504A-H_Drum_Memory_CE_Manual_Jul72.pdf for the 1700

More information about the cctech mailing list