Unibus disk controller with modern storage

Noel Chiappa jnc at mercury.lcs.mit.edu
Fri Oct 21 14:23:33 CDT 2016

    > From: Paul Koning

    > 1976 Peripherals Handbook, page 6-4. It specifies the driver output
    > low voltage at 70 mA sink, not 50...

Differing editions give slightly different numbers. I was looking at the 1972
edition (which was the one that was closest to hand, no other reason); the
number I gave is on pg. 204. I haven't checked later ones to see if there
were further revisions.

The later 70mA sink spec is probably a slightly more robust number to work


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