25 Aug
2005
25 Aug
'05
10:21 a.m.
>>>> "Simon" == Simon Fryer
<fryers at gmail.com> writes:
Simon> On Thu, 25 Aug 2005 12:16:22, Joe R. <rigdonj at cfl.rr.com>
Simon> wrote:
> Does anyone recognize this card?
> <http://www.classiccmp.org/hp/Stuff%20Found%20at%20Rogers/network%20card.jpg
Simon> Cabling looks like SDI.
Agreed.
> > I found it in a PDP-11/44 but I couldn't
find a model number or
> manufacturer's name on it. The other end of the four red cables
> connect to four BNC connectors on the back of the cabinet and are
> marked Network Ports. see
> <http://www.classiccmp.org/hp/Stuff%20Found%20at%20Rogers/back3.jpg>
Simon> The BNC connectors are a bit novel if it is SDI.
If they were TNC (threaded not bayonet) I'd suspect it to be a CI
interface card (from an HSC50 or the like).
It doesn't look like a DEC board (unless the digital logo is on the
other side). The cable attachment for those coax cables doesn't have
a DEC look to it, either. And the picture of the back has a mil-spec
look to it. I wonder if this is a military databus interface.
It's hard to tell from the back panel photos. Are those connectors
actually BNC, or are they like BNC but a bit smaller? Do they have
three or four prongs instead of the conventional 2 bayonet prongs? If
so, they'd be TPS connectors, which fits the databus hypothesis.
paul