2 Aug
2000
2 Aug
'00
10:50 a.m.
--- Chuck McManis <cmcmanis(a)mcmanis.com> wrote:
Well the VAX fairy visited me and dropped off a
"pile of junk". Inside the
junk were a couple of Unibus expansion bays and in those were a board from
MDB systems that asserts it connects a Unibus to a Q-bus. Unfortunately
I've only got the Unibus half apparently and there is a matching card that
plugs into the Q-bus.
Univerter/Qniverter? Depending on what the docs say, would the Q-bus end
be similar to what DEC used to connect BA-11N or BA-23 boxes together?
It does kinda matter which way you are going (i.e., Unibus or Q-bus CPU)...
mostly because the Unibus is 18-bit and the Q-bus is 18 or 22 bit (or 16 ;-)
with completely different ideas about how to map space (which matters at
the driver level, not the hardware level).
We looked into such products at work, but we decided that the extra effort
on the driver did not pay for saving a development box.
Apparently I also got a set of VAX 11/750 cpu cards
and memory. Is this
something anyone is interested in?
To rescue from oblivion, yes. To put to immediate use, no. I have two
11/750s and wouldn't mind spares, but space/cash is too tight for such an
optional set of boards. I haven't even fired one up since I moved it to
the Quonset hut. It sits, temporarily unloved, until I can wire a 30A
Hubble receptacle for it.
Finally I got some docs on the VAX BI bus but I'm
reserving those for Bill
if he wants them.
If not, please let me know. I have an 8300.
Thanks,
-ethan
=====
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