10 Dec
2008
10 Dec
'08
3:35 a.m.
From my reading of the relevant literature, the
'smarts' for direct vs. "null modem" connections is in the endpoint - if
you were connecting a MMJ-equipped device to a D-connector-equipped device. When I've
connected a computer to a monitor (i.e. a VT420 to a PDP11/73, pretty similar to your
setup), just plugging the MMJ cable into each one has always worked. I'm not aware
that there are crossed vs. non-crossed MMJ-tipped cables. FWIW -- Ian
________________________________________
From: cctalk-bounces at classiccmp.org [cctalk-bounces at classiccmp.org] On Behalf Of
Glen Slick [glen.slick at gmail.com]
Sent: Tuesday, December 09, 2008 5:30 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: Source for MMJ cables.
On Tue, Dec 9, 2008 at 4:22 PM, Andrew Back <andy at smokebelch.org> wrote:
Ah, so I have a BC16E-10. It's been a while but I assumed that since it was
crossover and I was having no joy that I had the wrong cable. I should be
clear, I'm trying to connect a VT420 to a PDP11/53. Tried both ports on the
PDP and all manner of settings on the VT. I'm assuming that I can use the
MMJ socket on the VT (the one not marked for a printer obviously) and that I
don't need to use the 25W D and an MMJ convertor.
Just a minute ago I connected a KDJ11-SD / M7554-SD to a VT320 by
plugging one end of a BC16E cable into the A1 plug on the 11/53 and
the other end into the VT320. Set the VT320 for 9600 baud and powered
on the 11/53 and got the boot ROM startup. No messing around required
for this setup for me...
-Glen