Unibus disk controller with modern storage

Al Kossow aek at bitsavers.org
Fri Oct 21 16:14:44 CDT 2016

I'd trust the later documents. They went through a lot of pain in the 70's
pushing the limits of what the bus could do.

If it were me, I'd build the stuff on Eurocards with a cable running to a
Unibus paddle.

On 10/21/16 12:23 PM, Noel Chiappa wrote:
>     > 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
> with.
> 	Noel

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