Van: william degnan<mailto:billdegnan at gmail.com>
Verzonden: maandag 28 november 2016 01:28
Aan: General Discussion: On-Topic Posts<mailto:cctech at classiccmp.org>
Onderwerp: Re: DEC M9312 Configs for a 11/40
I have a CPU backplane populated as follows, I have checked the jumpers on
the CPU cards to verify that they're correct to the options installed
1: empty
2: M7253
3: M7232 (1-4) M7237(5)
4: M7231
5: M7233
6: M7235
7: M7234
8: M7236
9: empty with GC
FWIW, slot 1 is only for M7239 and slot 2 is only for M7238.
I assume what you have in slot 2 is a typo, it can only be EIS.
Slot 1 is for FIS.
- Henk
Hi folks.
As I begin getting my 8e running, after checking the PS for proper voltages and ripple I connected up the front panel. This picture is with all cards removed, just the PS and front panel.
http://w2hx.com/x/VintageComp/PDP-8e/power-applied-no-cards.jpg
Can anyone tell me if I have burned out bulbs (7 not illuminated in total)? Or is this inconclusive because they may be in some random state? Or, with all cards out - should I expect all lamps to illuminate? I have read all of the info/threads on bulb this great community has produced, I found a company with a stash of OL-2 which I will probably go with once I determine if I have a bulb problem or not.
Thanks
Eugene W2HX
I vaguely recall a T-1 network controller with a 8x300 series
controller in an X.25 node about 30 years ago, but I don't have any
supporting doco. I think it's pretty clear that uses other than disk
controllers were very rare.
KJ
> From: Pontus Pihlgren
> The machine also has a qbus which is somewhat peculiar to find in a
> desktop VAX.
I don't know much about Vaxen, but I think the early desktop ones all had a
QBUS. I'm not sure if it was ever used for memory access; I know some used it
as an I/O bus (to take advantage of all the existing QBUS I/O devices), and
used an 'over-the-back' cable system for the memory bus.
> However, I don't have the cables necessary to attach a QBUS expansion.
> Does anyone have a set? What do they even look like?
They are a pair of boards connected with a pair of 50-pin cables. The boards
are different on each end, because the QBUS does not have in/out connectors
which separate from device slots, like the UNIBUS; it only has regular QBUS
slots, and those have grant in on different pin from grant out. So on the card
at the end of one backplane, the grant line is connected to the 'grant in'
pin, and on the other card, to the 'grant out' pin.
There are a whole bunch of different card and variants thereof for this, with
and without termination resistors, etc; the M9400/M9401 pair are for Q18
(which you won't want, I'd be pretty sure), and the M9405/M9405 for Q22. One
set I know of is an M9404/M9405-YB.
There's a fair amount of discussion of multi-segment QBUS systems in the QBUS
PDP-11 processor/etc manuals, as far as the termination, etc goes.
As to finding a set, there are some available on eBait at the moment for a
not wholly unreasonable amount of money.
Noel
Hi all...I am hoping there is someone here who has an 11/40 or 11/35 and a
M9312 ROM terminator card. I'd like to know how you have yours jumpered.
I took photos of the jumpers installed in my M9312:
http://www.vintagecomputer.net/digital/PDP11-40/M9312/
Here is the page from the manual that describes jumpers per UNIBUS system
type:
http://www.vintagecomputer.net/digital/PDP11-40/M9312/M9312_Jumper-configur…
1) Yes or no - Did I correctly identify the location of W8?
2) Yes or no - Should W8 be in for am 11 40/25/10/05 or is the /40 special?
Here is the issue....when I jumper W8 the CPU can do very little and I
cannot activate the CONSOLE ROM. I put in posts into what I believe is W8
so I can switch back and forth without having to re-solder. With W8 out
the system works better, and I can at least get to the CONSOLE prompt.
Looking for opinions as to whether my card is correctly configured. I am
trying to determine why I can't bootstrap and run a TU58 nor RL11, yet I
can load and run BASIC just fine. I think I may have a UNIBUS problem OR
a CPU card problem, but I can't load XXDP either to determine for sure.
There are more problems, I can't bootstrap the RL11 nor TU58 manually
either, I am working through everything CPU and UNIBUS too.
Is there a complete XXDP tape that I can download from PDPGUI? I found
TU58 image but I can't get the TU58em emulator to work yet. If I could
just figure out why I can load BASIC and not RL02 RT11 I'd make my day.
Thanks
Bill
Hi
I brought up a VAX 4000-100 yesterday to test DSSI disks. It worked like
a charm.
The machine also has a qbus which is somewhat peculiar to find in a
desktop VAX. However, I don't have the cables necessary to attach a QBUS
expansion.
Does anyone have a set? What do they even look like?
Kind Regards,
Pontus.
Hi folks,
This is my first vintage computing project. I have a PDP-8/e with the following boards in this order.
FRONT PANEL
M8330 KK8E CPU Timing board (system clock), replaces M833
M8300 \ KK8E CPU Major registers
M8310 / KK8E CPU Major register control
M837 MC8E Extended Memory and Time Share Control
M849 SHIELD
CORE1 \
CORE1 /
CORE2 \
CORE2 /
M8320 KK8E Bus loads
Each core pair is 16KW. There are a bunch of other non-DEC boards (ECRM) that I have removed for the time being. You will notice that I have no serial board (yet. I have a line on one).
I have cleaned up the machine, removed and clean out the foam, cleaned the card sockets and card edges, tested the power supply. I am ready for the next step.
Next, I will put the boards back in and start testing. I am looking for some very simple programs that I can key in from the front panel to do some basic testing. I have found simple programs on the internet but they are all in assembler and I don't yet have the knowledge/tools to convert them to switch-enterable programs. For example, here are some good test programs but not directly enterable on the front panel (or at least I don't know how).
http://dustyoldcomputers.com/pdp8/pdp8i/testprogs/index.html
Can someone direct me to some simple sequence of switch settings to do some basic testing?
Many thanks in advance
Eugene W2HX
PS. Here is more on the machine as received:
http://w2hx.com/x/VintageComp/PDP-8e/
Also as you will find on the internet, the ECRM boards are from a company that produced electronic character recognition systems.
Sorry for the bandwidth. Looking for Jos Dreesen who back in 2005 mentioned on this list that he had documentation on the ECRM OCR system. Please contact me if you can.
Thanks
Eugene
Does anyone know off hand what polarity that Mac Portable requires? I know that the original was 7.5V @ 1.5A, but not sure of the polarity.
I did have have a PB100 power supply that I used with mine, but (unfortunately) no longer have it.
Also (if it still works) what is the easiest way to image the old Conner SCSI drive? It doesn?t appear to have a standard connector.
I have googled this, but didn?t come up with anything useful.
Thanks,
Chris...
I am not certain exactly what you mean by polarity in this case, but I?m guessing that you are asking which contact is positive and which is negative.
If that?s the case, the center socket is positive, and the outer jacket band is negative.
I hope this helps.
smp
--
Stephen M. Pereira
Bedford, NH 03110
KB1SXE
> On Nov 27, 2016, at 1:00 PM, cctech-request at classiccmp.org wrote:
>
> ------------------------------
>
> Message: 6
> Date: Sat, 26 Nov 2016 16:26:43 +1000
> From: Chris Pye <pye at mactec.com.au <mailto:pye at mactec.com.au>>
> To: "General Discussion: On-Topic and Off-Topic Posts"
> <cctalk at classiccmp.org <mailto:cctalk at classiccmp.org>>
> Subject: Macintosh Portable
> Message-ID: <00D543B1-7E32-40DE-8829-91E3EBFCBF4A at mactec.com.au <mailto:00D543B1-7E32-40DE-8829-91E3EBFCBF4A at mactec.com.au>>
> Content-Type: text/plain; charset=utf-8
>
> Does anyone know off hand what polarity that Mac Portable requires? I know that the original was 7.5V @ 1.5A, but not sure of the polarity.
>
> I did have have a PB100 power supply that I used with mine, but (unfortunately) no longer have it.
>
> Also (if it still works) what is the easiest way to image the old Conner SCSI drive? It doesn?t appear to have a standard connector.
>
> I have googled this, but didn?t come up with anything useful.
>
>
> Thanks,
> Chris...
>
>
>
