9 Nov
2015
9 Nov
'15
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