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 >
