SMD disk specifications

Eric Smith spacewar at
Fri Dec 13 13:42:20 CST 2019

On Fri, Dec 13, 2019 at 10:55 AM Guy Sotomayor via cctalk <
cctalk at> wrote:

> I’ve been trying to find *detailed* specifications (mainly detailed signal
> timings) for the SMD disk interface but all I’ve found so far are the
> interface specifications for individual disks (CDC, Fujitsu, etc).  I’ve
> looked in the usual places (bitsavers mostly) and haven’t found the spec
> itself.  If anyone has any pointers, I’d appreciate it.

You've seen that the SMD spec (as of March 1981) is on Bitsavers?

That doesn't cover later enhancements such as SMD-E.

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