15 Nov
2014
15 Nov
'14
11:43 a.m.
From: Henk Gooijen
I wanted to connect a VT510 to the console port. All
connectors are
DE-9
Really? The PDP-11/94-E User Guide (EK-PDP94-MG-001), available online in a
number of places, shows (pg 46, aka 2-18) the Console/SLU panel, and the
Console connector is much larger than the SLU connectors. (The illustration
shows a 23-pin D-type connector - presumably an error, it should have been
25.) And here:
http://www.pdp-11.nl/pdp11-93/rear-panel-small.jpg
is a picture of one, and it indeed has the 25-pin console connector.
Although I suppose it's possible they changed the actual hardware at some
point, and some real machines have a 9-pin D-type? Or maybe a VAX of some
sort uses a similar panel, but with all 9-pin D-types, and someone had
stuck on of those on that machine?
What worked for me is the "VAX console
cable", in other words: that
DE-9 connectors is NOT "PC alike"! You can find the VAX console cable
pinout on the web.
Good catch! It makes sense that the VAX and 11/93-94 use the same 9-pin
D-type pinout; that way they'd only have to have one kind of cable.
Noel
15 Nov
15 Nov
2:55 p.m.
On Sat, 15 Nov 2014, Noel Chiappa wrote:
If that's the case, then one could also use a H8571-B adapter with a MMJ
cable to connect the terminal. One thing to watch out for with the H8571-B
adapters though is that they are thicker than most of the other DB25 and
DE9 adapters such as the H8571-J, H8575-A, etc so you'd need the ports
further apart than typical if you wanted to use multiple adapters
side-by-side. The H8571-B I had laying on the desk is about 7/8" thick at
the MMJ connector and tapers down in an L-shape to about 5/8" thick at the
DE9 end.
From: Henk
Gooijen
I wanted to connect a VT510 to the console port.
All connectors are
DE-9
Really? The PDP-11/94-E User Guide (EK-PDP94-MG-001), available online
in a number of places, shows (pg 46, aka 2-18) the Console/SLU panel,
and the Console connector is much larger than the SLU connectors. (The
illustration shows a 23-pin D-type connector - presumably an error, it
should have been 25.) And here:
http://www.pdp-11.nl/pdp11-93/rear-panel-small.jpg
is a picture of one, and it indeed has the 25-pin console connector.
Although I suppose it's possible they changed the actual hardware at
some point, and some real machines have a 9-pin D-type? Or maybe a VAX
of some sort uses a similar panel, but with all 9-pin D-types, and
someone had stuck on of those on that machine?
What worked for me is the "VAX console
cable", in other words: that
DE-9 connectors is NOT "PC alike"! You can find the VAX console cable
pinout on the web.
Good catch! It makes sense that the VAX and 11/93-94 use the same 9-pin
D-type pinout; that way they'd only have to have one kind of cable. 
5:15 p.m.
-----Oorspronkelijk bericht-----
From: Tothwolf
Sent: Saturday, November 15, 2014 3:55 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: pdp11/93 DB9 rs232 pinout
On Sat, 15 Nov 2014, Noel Chiappa wrote:
If that's the case, then one could also use a H8571-B adapter with a MMJ
cable to connect the terminal. One thing to watch out for with the H8571-B
adapters though is that they are thicker than most of the other DB25 and
DE9 adapters such as the H8571-J, H8575-A, etc so you'd need the ports
further apart than typical if you wanted to use multiple adapters
side-by-side. The H8571-B I had laying on the desk is about 7/8" thick at
the MMJ connector and tapers down in an L-shape to about 5/8" thick at the
DE9 end.
---
</VERY embarassed>
Oops, major mistake. You are correct, the console *IS* DB-25!
Bad memory, old age, who will tell?
But what I remember for 100% is that it is not as a PC!
I am going to the "hangar" this week, take the console cable so that
I can measure the connected pins and report back here.
apologies,
- Henk, PA8PDP
From: Henk
Gooijen
I wanted to connect a VT510 to the console port.
All connectors are
DE-9
Really? The PDP-11/94-E User Guide (EK-PDP94-MG-001), available online
in a number of places, shows (pg 46, aka 2-18) the Console/SLU panel,
and the Console connector is much larger than the SLU connectors. (The
illustration shows a 23-pin D-type connector - presumably an error, it
should have been 25.) And here:
http://www.pdp-11.nl/pdp11-93/rear-panel-small.jpg
is a picture of one, and it indeed has the 25-pin console connector.
Although I suppose it's possible they changed the actual hardware at
some point, and some real machines have a 9-pin D-type? Or maybe a VAX
of some sort uses a similar panel, but with all 9-pin D-types, and
someone had stuck on of those on that machine?
What worked for me is the "VAX console
cable", in other words: that
DE-9 connectors is NOT "PC alike"! You can find the VAX console cable
pinout on the web.
Good catch! It makes sense that the VAX and 11/93-94 use the same 9-pin
D-type pinout; that way they'd only have to have one kind of cable.
3697
days inactive
3697
days old
2 comments
3 participants
participants (3)
-
henk.gooijen＠hotmail.com -
jnc＠mercury.lcs.mit.edu -
tothwolf＠concentric.net