UNIBUS extension card/cable sets Was: Looking for info on National Semiconductor RAM board (VAX 11/730)
22 Jun
2015
22 Jun
'15
11:09 a.m.
From: tony duell
a 'Unibus Out', you can plug a Unibus cable in
there to link to an
expansion box. The official way involved special dual-height cards at
each end with 3 40-way Berg-type cables linking them.
So I'm trying to look into this (BC11 cables being unobtainium these days, at
least at prices which are less their weight in gold).
I see 'three' different kinds of 'UNIBUS to cables' cards listed:
M9014 UNIBUS to 3 H854s
M9015 3 H854s to UNIBUS
M9031 UNIBUS to 3 3M cables for 11/74
M9042 UNIBUS to 3 H854, Dual
I assume the M9014/M9015 are a pair, one used at the start of the cable, and
one at the end?
Does anyone know the difference between these three, and is my guess about the
M9014/M9015 being a pair correct? (I did look for documentation to answer
these, but couldn't find any - although maybe I didn't look in the right places.)
Noel
22 Jun
22 Jun
11:39 a.m.
On Mon, Jun 22, 2015 at 11:09:38AM -0400, Noel Chiappa wrote:
I assume the M9014/M9015 are a pair, one used at the
start of the cable, and
one at the end?
Interesting. I can't think of a reason why the two ends would need to be
different, but otherwise why do both exist? I've seen M9014s only at the
far end of the UBAs on a KS10, so it wasn't taking the place of a BC11.
Anyway it'd certainly be easy to make replacements for the M9014 and/or
M9015.
John Wilson
D Bit
11:51 a.m.
FYI, in my 750, the UNIBUS expansion has a L0010 in the main cabinet and
a M9014 in the expansion cabinet. I didn't note the details of the
cable(s) between the two when I did the inventory of my system.
On another topic, we had discussed me going through my B1000 stuff and
Burroughs contacts to assist the buyer of that system that you
facilitated. Unfortunately, all that I have come up with are dead ends.
I found additional material, but is all pretty much now unreadable.
On 6/22/15 8:09 AM, Noel Chiappa wrote:
From: tony
duell
a 'Unibus Out', you can plug a Unibus
cable in there to link to an
expansion box. The official way involved special dual-height cards at
each end with 3 40-way Berg-type cables linking them.
So I'm trying to look into this (BC11 cables being unobtainium these days, at
least at prices which are less their weight in gold).
I see 'three' different kinds of 'UNIBUS to cables' cards listed:
M9014 UNIBUS to 3 H854s
M9015 3 H854s to UNIBUS
M9031 UNIBUS to 3 3M cables for 11/74
M9042 UNIBUS to 3 H854, Dual
I assume the M9014/M9015 are a pair, one used at the start of the cable, and
one at the end?
Does anyone know the difference between these three, and is my guess about the
M9014/M9015 being a pair correct? (I did look for documentation to answer
these, but couldn't find any - although maybe I didn't look in the right
places.)
Noel 
12:18 p.m.
On 6/22/15 8:51 AM, Alan Perry wrote:
On another topic, we had discussed me going through my B1000 stuff and Burroughs contacts
to assist the buyer of that system that you facilitated. Unfortunately, all that I have
come up with are
dead ends. I found additional material, but is all pretty much now unreadable.
what
did you find?
3:28 p.m.
So I'm trying to look into this (BC11 cables being
unobtainium these days, at
least at prices which are less their weight in gold).
Are they really that rare? I've got a small box of them here.
I assume the M9014/M9015 are a pair, one used at the
start of the cable, and
one at the end?
If it's any help I pulled an M9014 out of the Unibus Out slot of my 11/730.
There's currently an
M9302 in there. I can't find the original expansion box (yet) so I have no idea what
was on the other
end of the cables.
-tony
3299
days inactive
3299
days old
4 comments
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participants (5)
-
aek＠bitsavers.org -
aperry＠snowmoose.com -
ard＠p850ug1.demon.co.uk -
jnc＠mercury.lcs.mit.edu -
wilson＠dbit.com