brew-your-own-unibus boards?

From: Tony Duell <ard_at_p850ug1.demon.co.uk>
Date: Tue Jan 20 17:06:51 2004

>
> Here's my take on the issue of not being able to use standard drivers and
> receivers for UNIBUS and Q-bus. Aren't both of these buses old enough that DEC
> made devices for both of them using only discrete logic, no ASICs? If they did

Well, that was certainly the case for Unibus. I think all DEC Qbus boards
used the DC005, etc, ASICs, theough...

> make UNIBUS and Q-bus devices w/o ASICs using only standard discrete logic, as
> I'm sure they did, what did they use for drivers and receivers?

Driver : 8881 (quad 2 input NAND with open collector outputs)
Receiver : SP380 (quad 2 input NOR)

Good luck in finding either of these new today...

-tony
Received on Tue Jan 20 2004 - 17:06:51 GMT