20 Jan
2004
20 Jan
'04
5:06 p.m.
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