cctalk Digest, Vol 48, Issue 17

Eric Smith spacewar at
Mon Sep 17 17:00:59 CDT 2018

On Mon, Sep 17, 2018 at 1:11 PM, Jeffrey S. Worley via cctalk <
cctalk at> wrote:

> What kind of cores does it use?

Pretty ordinary core memory. Being an early system, the cores were rather
large, so high currents were needed for read and write. There was forced
air temperature control, vs. oil immersion used in the contemporary IBM
7302 core storage unit (later replaced by air-cooled 7302A).

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