Unknown CDC unit , looks like a drum memory ?

[Al Kossow]

http://www.oocities.org/athens/forum/8564/books/wmthesis/thesis_01.htm
references the 863 being used on the CDC 3100

On 5/16/18 10:00 AM, Al Kossow via cctalk wrote:
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> On 5/16/18 9:13 AM, jos via cctalk wrote:
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>> Anyone can identify this ?
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> if you look on bitsavers under cdc/catalogs M90310500_Internal_Literature_Catalog_Jul75.pdf
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> lists several drum storage units including the models 861, 863 and 865
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> 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
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> 39731700A_BG504A-H_Drum_Memory_CE_Manual_Jul72.pdf for the 1700
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