9 Nov
2015
9 Nov
'15
4:09 a.m.
From: Jim Stephensn
I'm looking for a cable or cable pinout to get the
console of this
11/03 going.
...
It has a M7940-YA DLV11 controller.
Hmm. I can't find anything online about the -YA variant of the DLV11; the
DLV11 prints (MP00055) don't seem to show it.
I don't know exactly wqhat the "extra wires to bring out clock & .. 110/300
speed change" entail - and whether you have to have the right jumpers, etc in
the Berg connector to make it run?
Maybe the easier path would be to buy a different DL-type serial line board
(plain DLV11, DLV11-E, DLV11-F, DLV11-J), they're available on eBait for not
much money, usually - unless you already have one on hand, of course. (Or did
you - for authenticity reasons - _have_ to run the -YA card?)
Those are all a known quantity, pinout-wise; the first three all use the
standard DL11 cable [same as the UNIBUS one, M7800], the last one uses the
smaller header common to the later QBUS machines (e.g. 11/23+, etc).
If you have the Berg female shells and pins (not sure if you do; if not,
definitely worth getting them, since the cables are basically unobtainable,
but fairly easy to make), but don't know the pinout for them, let me know,
and I can supply both null-modem and non-null-modem cable diagrams (for DB25
connectors, already worked out; I have made DB9 serial cables, but not for
direct connection to a DLV11, but could generate those too).
Noel
9 Nov
9 Nov
12:13 p.m.
On 11/9/2015 4:09 AM, Noel Chiappa wrote:
the above reference I copied and pasted from
Megan Gentry's dec module guide
http://world.std.com/~mbg/pdp11-field-guide.txt
I don't know what that means either.
I am mainly asking if I want to hook up a terminal, can I get it going
with TD, RD and GND (or 2 3 7 on a DB25), or do I need to loop back any
of the other pins. Also I will have to figure out the serial settings,
as Dec was fond of even parity, and so forth. I figure DEC folks do
that in their sleep, like others do with the systems they work on frequenly.
I have several 4 port DLV boards, but want to go with this as a
reference. I paid a bit too much for it because it was "working" and I
don't want to screw it up by replacing cards. I know even less about
loading the backplane than I do about hooking up a serial cable.
I figure worst case I'll get the ribbon cable and wire the lines to a
DB9 or such and see what happens from there. I was hoping to get some
idea whether the correct cable might be available from someone on the
list first, and buy it, or better, find out how to spot them on ebay.
I've had a lot of luck with the boards, but none with finding listings
for cabling.
Once I have the full system I got working, I have another full system
and a power supply I plan to bring to working, then I'll be brave enough
to start moving things around in the backplane and trying the 4 port
cards. Most of them came from the cheap scrap guy, so I don't know the
state of them as well. I've seen some people found there were duds in
the pile.
From: Jim
Stephensn
I'm looking for a cable or cable pinout to
get the console of this
11/03 going.
...
It has a M7940-YA DLV11 controller.
Hmm. I can't find anything online about the -YA variant of the DLV11; the
DLV11 prints (MP00055) don't seem to show it.
I don't know exactly wqhat the "extra wires to bring out clock & .. 110/300
speed change" entail - and whether you have to have the right jumpers, etc in
the Berg connector to make it run?
Maybe the easier path would be to buy a different DL-type serial line board
(plain DLV11, DLV11-E, DLV11-F, DLV11-J), they're available on eBait for not
much money, usually - unless you already have one on hand, of course. (Or did
you - for authenticity reasons - _have_ to run the -YA card?)
Those are all a known quantity, pinout-wise; the first three all use the
standard DL11 cable [same as the UNIBUS one, M7800], the last one uses the
smaller header common to the later QBUS machines (e.g. 11/23+, etc).
If you have the Berg female shells and pins (not sure if you do; if not,
definitely worth getting them, since the cables are basically unobtainable,
but fairly easy to make), but don't know the pinout for them, let me know,
and I can supply both null-modem and non-null-modem cable diagrams (for DB25
connectors, already worked out; I have made DB9 serial cables, but not for
direct connection to a DLV11, but could generate those too).
I'd love that,
thanks Noel. I'm just trying to get as many questions
answered before I start applying power and squinting at LED's on a
serial status box, or on a scope.
Noel
Thanks
Jim
12:22 p.m.
-----Oorspronkelijk bericht-----
From: jwsmobile
Sent: Monday, November 09, 2015 9:13 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: PDP 11/03
I am mainly asking if I want to hook up a terminal,
can I get it
going with TD, RD and GND (or 2 3 7 on a DB25), or do I need
to loop back any of the other pins. Also I will have to figure out
the serial settings, as Dec was fond of even parity, and so forth.
As far as my limited PDP-11 knowledge goes, none of them used
handshake. So, Rxd, TxD and GND is all you need to connect.
Also, common (?) is *no* parity.
- Henk
12:38 p.m.
On 11/9/2015 12:22 PM, Henk Gooijen wrote:
-----Oorspronkelijk bericht----- From: jwsmobile Sent:
Monday,
November 09, 2015 9:13 PM To: General Discussion: On-Topic and
Off-Topic Posts Subject: Re: PDP 11/03
Thanks, Henk. The main instance I've ever encountered parity other than
N is with DEC systems, either VAX or Alphas. And I was not connecting
to the consoles, which I am in this case. Just worth asking. Seems to
be one of the common fubars with all the "how do I hook up serial" to
any system.
thanks
jim
I am mainly asking if I want to hook up a
terminal, can I get it
going with TD, RD and GND (or 2 3 7 on a DB25), or do I need
to loop back any of the other pins. Also I will have to figure out
the serial settings, as Dec was fond of even parity, and so forth.
As far as my limited PDP-11 knowledge goes, none of them used
handshake. So, Rxd, TxD and GND is all you need to connect.
Also, common (?) is *no* parity.
- Henk
12:43 p.m.
Just in case it helps, a while back I made a little board to adapt DLV11 plugs to 8p8c
modular jacks, since I'm rediscovering the utility of adapting everything I own to
common serial pinouts. It's not packaged up for public consumption very well yet
(including a link in the documentation to a doesn't-exist-yet tag on my blog), but
here are the Eagle design files:
https://github.com/NF6X/DLV11toRJ45
I should take a picture of the finished item, too. Maybe later today...
--
Mark J. Blair, NF6X <nf6x at nf6x.net>
http://www.nf6x.net/
2:05 p.m.
On 2015-11-09 21:13, jwsmobile wrote:
On 11/9/2015 4:09 AM, Noel Chiappa wrote:
the above reference I copied and pasted from
Megan Gentry's dec module
guide
http://world.std.com/~mbg/pdp11-field-guide.txt
I don't know what that means either.
I doubt the -YA makes any significant difference here.
From: Jim
Stephensn
I'm looking for a cable or cable pinout to
get the console of this
11/03 going.
...
It has a M7940-YA DLV11 controller.
Hmm. I can't find anything online about the -YA variant of the DLV11; the
DLV11 prints (MP00055) don't seem to show it.
I don't know exactly wqhat the "extra wires to bring out clock & ..
110/300
speed change" entail - and whether you have to have the right jumpers,
etc in
the Berg connector to make it run? I am mainly asking if I want to hook up a terminal,
can I get it going
with TD, RD and GND (or 2 3 7 on a DB25), or do I need to loop back any
of the other pins. Also I will have to figure out the serial settings,
as Dec was fond of even parity, and so forth. I figure DEC folks do
that in their sleep, like others do with the systems they work on
frequenly.
Normally, you'd call them Tx, Rx and GND, but anyway...
No, you do not need to loop back any signals. DEC didn't like to abuse
modem control for flow control.
Serial settings... Well, that is essentially a software thing. So it
depends on the system you have installed. The hardware can of course
also do different things, but most of the time it's 8N1, and then
software fool around.
But anything more modern than mid-70s will most likely be 8-bit clean.
I have several 4 port DLV boards, but want to go with
this as a
reference. I paid a bit too much for it because it was "working" and I
don't want to screw it up by replacing cards. I know even less about
loading the backplane than I do about hooking up a serial cable.
I figure worst case I'll get the ribbon cable and wire the lines to a
DB9 or such and see what happens from there. I was hoping to get some
idea whether the correct cable might be available from someone on the
list first, and buy it, or better, find out how to spot them on ebay.
I've had a lot of luck with the boards, but none with finding listings
for cabling.
That would be a DE9. :-)
The information about cabling is in pretty much any DEC manual you'll
look in. The DLV11 manuals should be on bitsavers even.
Once I have the full system I got working, I have
another full system
and a power supply I plan to bring to working, then I'll be brave enough
to start moving things around in the backplane and trying the 4 port
cards. Most of them came from the cheap scrap guy, so I don't know the
state of them as well. I've seen some people found there were duds in
the pile.
Note that a -YA normally means it's just a board with a newer revision.
It do not normally means any change in functionality, except perhaps
some improvement. But in general totally compatible.
Johnny
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
Maybe the easier path would be to buy a different DL-type serial line
board
(plain DLV11, DLV11-E, DLV11-F, DLV11-J), they're available on eBait
for not
much money, usually - unless you already have one on hand, of course.
(Or did
you - for authenticity reasons - _have_ to run the -YA card?)
Those are all a known quantity, pinout-wise; the first three all use the
standard DL11 cable [same as the UNIBUS one, M7800], the last one uses
the
smaller header common to the later QBUS machines (e.g. 11/23+, etc).
If you have the Berg female shells and pins (not sure if you do; if not,
definitely worth getting them, since the cables are basically
unobtainable,
but fairly easy to make), but don't know the pinout for them, let me
know,
and I can supply both null-modem and non-null-modem cable diagrams
(for DB25
connectors, already worked out; I have made DB9 serial cables, but not
for
direct connection to a DLV11, but could generate those too).
I'd love that,
thanks Noel. I'm just trying to get as many questions
answered before I start applying power and squinting at LED's on a
serial status box, or on a scope. 
10 Nov
10 Nov
2:55 a.m.
On Mon, 9 Nov 2015, Johnny Billquist wrote:
Normally, you'd call them Tx, Rx and GND, but
anyway...
No, you do not need to loop back any signals. DEC didn't like to abuse modem
control for flow control.
What about the connections between the TTL signals and the line
drivers/receivers? There are definitley such connections to be made in the
Berg connector (like TTL SERIAL DATA IN on connector pin E). For EIA you
need to connect pin E with pin M. (See also page 178 in the microcomputer
interfaces handbook [1980]).
Christian
5:06 a.m.
On 2015-11-10 11:55, Christian Corti wrote:
On Mon, 9 Nov 2015, Johnny Billquist wrote:
Yes. The signals exist, because you might be connecting to a modem. But
they are not used for flow control. You can control what is output, and
you can check what comes in. But the hardware do not act on any of this.
If you write your own software then you can of course do things based on
those signals...
Johnny
Normally, you'd call them Tx, Rx and GND, but
anyway...
No, you do not need to loop back any signals. DEC didn't like to abuse
modem control for flow control.
What about the connections between the TTL signals and the line
drivers/receivers? There are definitley such connections to be made in
the Berg connector (like TTL SERIAL DATA IN on connector pin E). For EIA
you need to connect pin E with pin M. (See also page 178 in the
microcomputer interfaces handbook [1980]).
3330
days inactive
3331
days old
7 comments
6 participants
participants (6)
-
bqt＠update.uu.se -
cc＠informatik.uni-stuttgart.de -
henk.gooijen＠hotmail.com -
jnc＠mercury.lcs.mit.edu -
jws＠jwsss.com -
nf6x＠nf6x.net