22 Nov
2006
22 Nov
'06
5:57 p.m.
A couple of us were talking off-list about ways to
interface to Q-bus
and transceiver chips for that bus are certainly hard to find (at
least we don't know of any sources for the actual DEC transceiver
chips or clones).
Is the situation different for UNIBUS?
Not really, the voltage levels, etc are pretty similar.
But if your bus is not heavily loaded, then you can 'get away' with using
open-collector TTL gates as drivers, and even 74LS14 schmitt triggers as
receivers. This does not meet the spec, but it works.
-tony