> From: Marc Howard
> I've got an 11/40 I'm going to start working on. Problem is that there
> are two power supplies (H742 and H7420) that came with it but neither
> was mounted in the rack.
-11/40's in general only have one of those large H742x suppplies in a rack.
The documen
> From: Rod Smallwood
> Let me see what artwork I have
I'm curious as to what you'd be able to find. Like I said, I'm pretty sure
DEC never did an RK11-C inlay; the engineering drawings for the 19" indicator
panel (included in the RF11 engineering drawings:
http://www.bitsavers.org/pdf
> From: Jay Jaeger
> Also, if someone (else, presumably) does up a replica of the indicator
> panel board (perhaps with the option to use LEDs, with some resistor
> packs that could be bypassed for lamps
Two points.
First,there's the question 'are you trying to produce somethi
> From: Steven Malikoff
> Was there ever an indicator panel for the RC11? .. I have a set of RC11
> modules .. No backplane though. I've not found any docs for these, I
suppose
> they're probably on bitsavers and have overlooked them.
Looking at the manual and engineering drawing
> From: Tony Duell
> I have _two_. But alas nothing to connect them to.
Well, there are still a good flock of machines with IBM channels around, but
_you_ don't have one (I can't blame you :-). I wonder if any of the people
with IBM channel machines have any need to connect to an -11?
Sp
This guy:
https://www.ebay.com/sch/m.html?_ssn=jariadkin-0&_sop=10
has a couple of PDP-8 boards for sale that at the moment are going _really_
cheap.
Noel
This:
https://www.ebay.com/itm/275084268137
The starting price is expensive, but probably not utterly unreasonable,
given that:
- the 780 was the first VAX, and thus historically important
- 780's are incredibly rare; this is the first one I recall seeing for sale
in the classic computer
> From: Chris Zach
> a M857 board with a RS232 cable on it and BC01R-25 on it.
Anyone know what an M857 is? I guess it might be a DF11 async answer mode? I
found this:
https://www.computerhistory.org/collections/catalog/102731577
but I think the number there is wrong; I'm not sure exa
> From: Jonathan Chapman
> Last one that went auction-style on eBay went for $1,178.00
When was that?
Do you have any details of the machine's config?
That's a pretty good deal for a 780 (IMO).
Noel
> From: Chris Zach
>> Anyone know what an M857 is? I guess it might be a DF11 async answer
>> mode?
> No, it's a single width full height M series board from the early
> 1970's.
Argh, digit swappping on my part.
The _M587_ is in the DN87 FMPS:
http://www.bitsavers.org/p
> From: Grant Taylor
> From that last picture, it looks like one of the plugs is five pronged,
> and looks very similar to the 120/208V 30A 3? plug in one of the
> pictures about the current 780 auction.
Not too surprising; the /780 and /785 are basically the same machine. (In
fac
> From: Scott Quinn
> I have seen some roads where the utility has 2 of the phases plus
> neutral going down them, not true 2-phase power, but 2 phases 120/240
> degrees apart with the third phase just not present.
My street has that. The subdivision as a whole has all 3 phases (d
> From: Jon Elson
> It should be 208V
Oh, right you are. It's been a long time, and I had a distinct memory that it
was less than that, but I looked, and I think that's it. The term for my
flavour of 3-phase is apparently "open wye/open delta"; each leg is 240V to
the others, but only two
> From: Rob Jarratt
> Does anyone know what the correct one is?
This:
http://gunkies.org/wiki/DEC_standard_modular_regulators
has all the details.
(If anyone knows of any PDP-11 hardware or UNIX information which is not on
the CHWiki - I'm not interested in DEC PDP-11 software, but i
> This:
> https://www.ebay.com/itm/275084268137
> ...
> Anyway I fully expect it to go ... for a _lot_ more than the opening
price.
Much to my surprise, it didn't sell at all (although a number of other lots,
likely from this machine, did.)
I'm rather puzzled that an -11/70 w
> From: Tom Hunter
> The original "Portable C Compiler" by S. C. Johnson (also known as
> "pcc") had functional support for the Data General Nova. Could somebody
> please point me to this original implementation?
> ...
> I am looking for the original implementation - not an
> From: Chris Zach
> the secondary memory (a Plessy 700101-100) may be shorting the -15 line
> for some reason. Working on it, but does anyone have a manual or
> anything like that for this kind of memory board?
I've got a Plessey core memory manual somewhere, but I can't find it,
> From: Chris Zach
> the DD11-B is a MUD backplane
No, it's SPC; other sources, e.g.
http://www.chdickman.com/pdp11/Notes/DD11.shtml
agree.
So if you have a DD11-B, you must have a BA11-D, with the 9-pin power
plugs.
The best thing to do is get a DD11-C or -D, and build an adapter c
> an adapter cable to go from a 9-pin male (shell; female pins) to a
> 15-pin female (shell; male pins)
Sigh, shouldn't try to type when I'm this tired. Female 9-pin (to plug into
the BA11-D) to male 15-pin (for the DD11-C/D to plug into).
Noel
> From: Chris Zach
> I'm guessing that the DD11-F is significantly different from the DD11-B?
I assume theat "DD11-F" is a typo; there is, AFAIK, no DD11-F, and a Web
search revealeddidn't turn anything up. (There are DD11-CF and -CK
backplanes, as well as -DF and -DK, but the -CF and -CK
Just ran across this:
http://wwcm.synology.me/pdf/MP00189%20FP11-A%20Field%20Maintenance%20Print%20Set.pdf
which isn't available online in this form. (This appears to be a different scan
from the one on the Maine Coon site, split up into several TIFF's, as it has
the cover which that one doesn
> On Wed, Jan 12, 2022 at 12:16 PM Mike Katz wrote:
> I am looking to make a RX01 (and hopefully RX02) disk formatter
Something that can format floppies for the RX01 can effectively format RX02
floppies, too.
An RX02 drive can convert RX01-formatted floppies to RX02-formatted floppies.
Speaking of FP11-A's:
https://www.ebay.com/itm/275096265379
I wouldn't mind having one, but not for that much! I wonder how much it
will go for?
Noel
> From: Gavin Scott
> I think if I had a whole lot of old faded greenbar etc. ... Someone may
> even have done this already
See:
https://walden-family.com/impcode/imp-code.pdf
Someone's already done the specialist OCR to deal with faded program listings.
Noel
> From: Gary Oliver
> I've always thought the physical tape wound on a DECtape spool was a
> fairly conventional 'sandwich' of mylar/oxide/mylar ...
> Was there some kind of 'lubricating' coat on the data side? It makes
> sense, but none of my DEC documents or Googling has any
> From: Gary Oliver
> Paul - thanks for the bitsavers reference.
Ahem!
In any case, it's Al who really deserves the credit, for finding that document,
and
putting it up.
Noel
> From: Paul Koning
> DH-11 is unusual in that it has DMA in both directions
McNamara's DH11? (I don't know of another DECdevice of that name.) Per:
http://www.bitsavers.org/pdf/dec/unibus/EK-ODH11-OP-002_DH11_Asynchronous_16-line_Multiplexer_Users_Manual_Sep76.pdf
it's DMA on output
> From: Chris Zach
> Maybe that is the dhv11.
The DH11, DHV11 and DHU11 are all very similar, although not 100.00% program
compatible.
(The DHQ11 can be set to exactly emulate either the DHV11 or DHU11.) So, all
provide
DMA output, but not DMA input.
Differences with the DH11 include two
> From: Bob Smith
> the original UART was designed by DEC, Vince Bastiani was the project
> lead and designer, Gordon Bell was behind the project, and it may have
> been his idea.
"Computer Engineering: A DEC View of Hardware Systems Design" covers this, in
a footnote on pg. 73.
> From: Paul Koning
> When did Unix first get partitions?
'Partitions' the mechanism, or partitions the term for the mechanism?
The former appeared about V5:
https://minnie.tuhs.org/cgi-bin/utree.pl?file=V5/usr/sys/dmr/rp.c
when an RP03 was added; pre-V7, UNIX filesystems were limite
> From: Tom Gardner
> You define logical disks by assigning a logical disk unit number to a
> file on a physical disk. You can then use the logical disk as though it
> were a physical disk.
To me, 'partition' implies a contiguous are of the disk; "a file" to me
implies that it
https://www.ebay.com/itm/393915648077
I've already got one for my machines that take one!
Noel
> From: Steve at oldcomputers.net
> There are some vintage tablets in Minneapolis (Eden Prarire) that would
> like, but the seller will not ship.
> Any help?
When dealing with eBaiters who can't/won't ship, I have had good luck with
PakMail (http://www.pakmail.com/); for a usually
>>> On Tue, Feb 8, 2022 at 6:18 PM Rod Smallwood wrote:
>>> On the M8266 CPU control board a defective 7404 (E111) has killed a
>>> bunch of the PROMs holding the microcode.
That's pretty astonishing; I've heard of PROMs dropping bits over time, but
I'm a bit amazed to hear of a failu
> From: Warner Losh
> Do those chips have ROM numbers on them?
I have updated the:
https://gunkies.org/wiki/KD11-E_CPU
https://gunkies.org/wiki/KD11-EA_CPU
articles with the DEC part numbers for the i) microcode and ii) instruction
decode PROms.
That's not all the PROMs on the Cont
> From: Rob Jarratt
> is the M9312 essential to ever get this machine to boot up an operating
> system?
Interesting question. I don't have my -11/24 running yet, so this reply is
theoretical, not tried in practice (and as we all know, the difference
between theory and practice is even
> From: Rob Jarratt
> I suspect some of the other cards that were in the machine might do the
> necessary termination stuff.
Different answers for each part of the functionality.
1A and 1C fundamentally have be at the end of the bus, physically. So,
unlikely; since _other_ cards aren
Anyone want a KK11-A:
https://www.ebay.com/itm/275173894774
US$200 sounds like a lot, I know, but KK11-A'S and FP11-A's are going for that
much; an FP11-A just went for US$250. And KK11-A's are rare; this is he first
one in a while.
Noel
> From: Jay Jaeger
> SACK turnaround capability so that the machine doesn't hang accessing
> an address that doesn't respond on the UNIBUS.
Umm, I think you're mixing up i) grant timeouts and ii) master-slave
timeouts.
All PDP-11 CPUs have master-slave timeout handling; after a short
So, I've made what I think is a significant discovery about the -11/34:
> 1B _is_ necessary, but can be provided anywhere on the bus; most
> UNIBUS/QBUS CPU [pullups] have it built in
I was wrong. Neither the KD11-E nor the KD11-EA has built-in termination and
pull-ups (those are both don
> Neither the KD11-E nor the KD11-EA has built-in termination and pull-ups
> ... I haven't yet checked, but it may be the only PDP-11 CPU of which
> that is true
Also the KD11-D of the -11/04.
Noel
> From: Vincent Slyngstad
> I had to replace one of those recently
Where did you source the replacement? I need a few.
Thanks!
Noel
>> On Feb 19, 2022, at 10:51 AM, Noel Chiappa wrote:
>> The -11/34 (not the /34A) has something unusual for grant timeouts,
>> but I forget the details. I'll look it up.
And here it is...
> From: Fritz Mueller
> I think you are thinking of the M9302, Noel: a far-side termina
> From: Bill Gunshannon
> Just wish I could get some PMI memory for that 93.
?? The KDJ11-E in the -11/93 comes with a minimum of 2MB on the CPU card.
That's enough for almost 16 maximum-sized processes (assuming they aren't
sharing program texts - almost double that, if they are). Does o
> From: Rod Smallwood
> dd is a linux command.
UNIX, actually. (V5, I think:
https://minnie.tuhs.org/cgi-bin/utree.pl?file=V5/usr/source/s1/dd.c
There no 'man'page for it in V4. Anyway...)
> I only have windows PC's.
There are Windoze versions. I've used this one:
http://www
> From: Christian Gauger-Cosgrove
> From the KDJ11-E module user's guide ... the solder-side of the CD
> fingers is left unpopulated, but for the +5 and ground pins.
> The only PMI compatible option then would be the KTJ11-B UNIBUS adapter.
I forget how the -11/84-94 backplane is
First, a minor correction:
> the M8264 Sack Timeout module ... there's next to nothing in print
> about them
There is also some coverage in EK-KD11E-TM-001, at: Section 4.7.2.4 "M8264
NO-SACK Timeout Module" (pg. 4-41, pg. 87 of the PDF), which I found while
looking for parity stuff (belo
> From: Mattis Lind
> What about the M9300 board? Do you have an idea what the purpose is of
> that card?
Yes, that one's well-documented and understood.
It's intended for use on the 'B' UNIBUS of the RH11-AB, in deployment
configuratons where that UNIBUS is in use, but there's no C
>> (I have yet to check and see if the KY11-LB asserts SACK if the CPU
>> halts on its own accord - probably 'yes', but that's a project for
tomorrow.)
Yes, it does. I toggled in the following program:
5000
5200
776
0
(what, you all can't program a PDP-11 in octal? :-) and hit '
> From: Steven Malikoff
> I have finally got around to scanning the print set for the DEC ME11-L
> memory expansion unit
Ah, thanks for that. The prints for the boards are available, in the
PDP-11/05 Engineering Drawings (on pp. 115-137), but the MF11-L backplane was
previously missin
> From: Rob Jarratt
> today I went back to it to check things a bit more carefully. All the
> power outputs of the PSU appear nominal.
> ...
> Presumably, whatever the part is, it is stopping the CPU working,
> because previously the CPU did appear to show some activity, al
> From: "Rob Jarratt"
> Thanks for the lengthy reply.
Glad to help - or try to.
> As an aside I have also been trying to find a fault on a Pro 350 which
> uses the same CPU chipset. I have a pinout but no datasheet.
There doesn't seem to be as lot on the F-11 set. I looked in th
> From: Brent Hilpert
> But the LED and CPU clock are not driven directly by that RC oscillator
> - there's a bunch of logic in-between the oscillator and the LED / CPU
> clock.
Oh, sure; it was late (for me; the dog woke me up at AM today :-), and it had
taken me a while to get e
> From: Murray McCullough
> One can only hope that D. Cherepanov can rebuild his museum someday
Is _he_ OK? (There are too many who aren't.)
Noel
> From: Rob Jarratt
> I found these two signals and ACLO is low (-15V)
'Good news, bad news'...
Bad is that something is seriously wrong there; 'allowed' values are 0v
(asserted) and +3V (un-asserted). I'm worried that the -15V will have taken
out some of the semiconductors that are 'lis
> From: Tony Duell
> A short in FET Q15 on the bias/interface board in the PSU could do it.
> The gate of that FET is driven from an LM339 comparator the -ve supply
> of which is -15V.
Ah; I hadn't even looked at the P/S prints.
(Like I said, I'm really weak on analog: for digita
> From: Brent Hilpert
> So apparently I've been looking at the wrong +5V supply (H777) because
> the rest of you are indeed looking at a different +5 supply (H7140),
> both of which are in that same 11/24 pdf document
That's because the H777 is the P/S for the BA11-L 5-1/4" box, a
> From: Brent Hilpert
> DCLO & ACLO behave as power-on-reset signals to the system.
Minor nit: actually, I think it's DCLO which performs that function in a lot
of places; see e.g. the latches on pg. K2 (pg. 153 of the PDF) and K7. (INIT,
usually in buffered form, is used more widely for
> From: Brent Hilpert
>> ACLO is only used to trigger a 'power-failing' interrupt; CPU
>> operation is otherwise un-affected by ACLO (so the CPU can get ready).
>> DEC P/S's carefully sequence ACLO and DCLO such that on power-down,
>> ACLO is asserted first (to allow the CPU t
> does [disabling the MCLK counter via DCLO, asserted by the two
> E126 monostable chain from ACLO] happen just on power-down, or on
> power-up too? I'd need to understand how that two monostable chain
> works in both cases, which I currently don't. (I only understand
> monostab
> and there is some circuitry driving the clear input on the second
> 123.
Never mind this section. I mis-read the print; the clear input is connected to
an _input_ of the flop below (which is also tied high).
Noel
Finally found time to get to this one...
> From: Rob Jarratt
> However, there is a puzzle. On the CPU I found that the track from the
> pull up resistor to E70 has been cut.
I don't know about the "pull up resistor" part, but I have several KDF11-U's,
and _all_ of them have the trace
> It was quite a struggle to separate those nylon connectors, is there a
> trick to it?
You mean the Mate-n-lok's? Not really; just make sure the catch is released.
What did you do about DCLO? (Oh, I think I see the answer, below looks
like you're relying on the pullup on K3...)
> The 'unused' gate in E52 is the one that the added wires from the ACLO
> ECO went to; I wonder if it was damaged by the -15V, somehow?
So, I checked, and the wire that goes from the plated-through hole next to the
etch cut on E70p1 winds up at E52p4 (the bus line on that transceiver),
th
> From: "Rob Jarratt"
> I did plug the connector back in, so that DCLO and
> LTC are connected, I just removed the ACLO pin.
Ah, OK, good. Pulling the pins from those Mate-n-Loc shells without the right
tool is tricky; glad you did it, because as Brent Hilpert pointed out, having
a w
So, I looked at the early editions of the "pdp11 peripherals hanbook", which
have good, detailed discussions of UNIBUS operations (at the back; chapter 5,
"UNIBUS Theory and Operation", in the 1976 edition), but in contrast to the
level of detail given for master/slave operations, and bus requests
> From: Paul Koning
> You might give a precise source citation on that page.
Done:
https://gunkies.org/w/index.php?title=UNIBUS_Initialization&curid=6842&diff=25463&oldid=25451
Don't complain to me if the publication data is skimpy; that's all that's in
it! (I mean, we all know that
> the later "pdp11 bus hanbook" (which, as mentioned, does not seem to be
> online yet, alas)
Arck, I'm a moron; Paul has pointed out to me that this is, in fact, online
at Bitsavers:
http://www.bitsavers.org/pdf/dec/pdp11/handbooks/PDP11_BusHandbook1979.pdf
It didn't show up in a coup
> From: Chris Zach
> So these go *into* RK06 or 07 drives?
Yes; per the "Field Guide to UNIBUS and QBUS Modules". Also:
https://gunkies.org/wiki/RK611_disk_controller
reveals that the RK611 contains "five hex cards" (listed there).
Noel
This:
http://www.ebay.com/itm/252820125010
looks like it might be an -11/70 backplane, but I'm too lazy to look up the
part number.
Noel
> From: Pontus Pihlgren
> The 11/70 backplane is wirewrapped.
Oh, right you are! I don't know where my brain has fled to these days!
It's actually an MJ11 (-11/70 core memory) backplane (I checked the part
number - plus someone pointed out that you can see "MJ11" written somewhere).
So all the DEUNA's I've seen have L10 (ceramic package, 10Mhz) 68K's in them.
Has anyone tried using anything else, and did it work?
I _assume_ an x12 would work, but until someone has acutally tried it...
The Pxx's (plastic packaging) might not work - according to the datasheet,
they are 2mm wid
> From: John Wilson
> I think this is DELUA?
Yes, that's right - sorry!
> I'm getting old ... could have it wrong.
No, _I_'m the one who's getting old! (But in this case, that's not it - I
always get the names of those two mixed up!)
> I'd be inclined to just try it.
I hadn't
> From: Bill Gunshannon
> Considering that I have never seen any sockets that were 2mm different
> in width ... I really can't imagine any CPU not fitting.
I think you're right. I took another look at the drawing, and I'd been looking
at the package width dimension: there's also a sep
> From: Bill Gunshannon
> I doubt Motorolla was in the business of custom making different size
> chips, even for DEC.
So, that triggered a question in my mind: why was DEC using the 68K on this
board, anyway? They had plenty of in-house chips the could have used, e.g.
the J11. The MC
> From: Philipp Hachtmann
> The 11/20 is the simplest 11 as far as I know.
'Simplest' in what sense? They certainly aren't the easiest ones to
understand, with all that random control logic! The -11/04 is far easier
to understand (for me, at least; YMMV).
> From: Ethan Dicks
>
Hi, a question about generic analog stuff.
In the process of getting SD cards to work, Dave is seeing square-wave noise
on a line. (1V of square wave, with pulses about 400ns long, running at
375kHz.) The line runs through a flat cable of modest length, along with
other signal-carrying lines. (No,
> From: Dwight Kelvey
> Is there any load resistance at the end of the line?
Yes, 270K to ground (i.e. pretty large). How does that have an effect on
whether cross-talk can create a square wave? Sorry, I'm not understanding.
Noel
I should mention that this is a pre-prototype; the final thing won't have a
cable at all; so this isn't a fundamental issue with the design (if it is
cross-talk). And the SD card isn't even plugged in when we see this - if it is
cross-talk, it has to be some other signal carried in the cable.
We'r
> From: Eugene (W2HX)
> I am still not convinced it is coupling at all. ... I just don't think
> you can get square waves from square waves. ...
> it is even harder to believe one could successfully couple a square
> wave onto such a transmission line unless the signal is actu
> From: Allison
> FYI this is the same problem designers hit with DRAMS back 40 years ago.
This didn't ring (pun not intended) a bell for me; can you say a bit more?
> From: Chuck Guzis
> I'll offer a suggestion that if your SD card *must* be a significant
> distance from it
> From: Brent Hilpert
> I don't have a full enough picture of the circuit and circumstances to
> provide a definitive suggestion but, some principles:
> ...
> It's not clear C-coupling is what's going on here (the wave shape looks
> pretty sharp for what I understand of the
> From: Glen Slick
> the Q22/Q22 backplane is not good for an 11/83 CPU ... M8190 boards and
> both have PMI signals on the CD half of the CPU board.
So I seem to recall hearing tales of PMI cards emitting smoke when plugged
into a Q/Q/ backplane. That doesn't seem to have happened he
> From: Steven Malikoff
> I've scanned the full version of this manual that comprises the
> installation guide, description, system specifications, theory of
> operation, timing chart, full schematic and manifest.
Oh, wow! You get the Documentation Preservation Gold Star! A neede
> From: Mattis Lind
> One of them does not seems to be at bitsavers.
That's on my list of items to get.
I have a page-feed scanner, so will easily be able to scan this (although
I'll have to get some instruction on exactly what incantation to use to
Acrobat to turn the TIFF's into a PDF;
> From: Sean Conner
> I really think it's for *this* reason (the handler() example) that C
> doesn't allow nested functions.
I wouldn't be sure of that; I would tend to think that nested functions were
left out simply because they add complexity, and didn't add enough value to
outweig
> From: John Wilson
> It would have been nice if it had stolen FORTRAN-77's idea of declaring
> a variable in the size that you want (I'm talking about INTEGER*2 vs.
> INTEGER*4 etc.), instead of just "knowing" what the difference is
> between int and long
Back in the late 70'
> From: Alfred M. Szmidt
> No even the following program:
> int main (void) { return 0; }
> is guaranteed to work
I'm missing something: why not?
Noel
PS: There probably is something to the sports car analogy, but I'm not going
to take a position on that one! :-) Inter
> From: Rod Smallwood
> All computer computer languages are only as good or bad as the person
> using them.
True words. I'd rather work on a program written in assembly language,
done by a _really good_ programmer, than a program written in _anything_,
done by a bad one. (My classic e
> From: Al Kossow
> Harry did an oral history at CHM
There are also a pair at the Smithsonian:
http://amhistory.si.edu/archives/AC0196_husk730419.pdf
http://amhistory.si.edu/archives/AC0196_husk720309.pdf
and the CBI did one too, but alas it does not seem to be on-line (it's not in
I have an extra copy of:
DEC-11-SERA-DDisk Operating System Monitor Programmer's Handbook,
February 1971
if anyone has a use for it.
Noel
Just a heads-up that the 1979 edition of the "pdp11 bus handbook" has a very
serious editing error in it, in the description of UNIBUS arbitration.
On page 38, immediately after step 13 of the NPR Arbitration Sequence
("13. SACK must be negated before BBSY may be negated."), it says "A bus
ma
> On Apr 21, 2017, at 1:26 AM, Pontus Pihlgren wrote:
> It makes me wonder, what is the oldest still running mailinglist?
I don't have access to my _old_ email (i.e. from the 80's) to confirm this,
and I don't think they still have copies of the very oldest mail, but the
IETF list has got
Hi, all, continuing the process of getting rid of duplicate DEC documentation:
I have an extra copy of the the UNIBUS Interface Manual, Second Edition
(DEC-11-HIAB-D); I'm interested in trading it for any interesting PDP-11
documentation or stuff you'd like to part with which I don't have.
One DEC
> From: Bill Gunshannon
> Surely there were Mailing Lists prior to the existence of the Internet,
> yes?
Absolutely. They started on the ARPANet, fairly early on.
E.g. SF-Lovers (one of the first 'non-mission related' mailing lists) started
in September, 1979, and MsgGroup (an 'offic
> From: Tony Duell
> Are any DEC enthusiasts here jealous of this
Actually, not me! I'm an old enough campaigner that I recall when real light
bulbs were standard, and they were a total PITA! So when LED's arrived, we
all though they were the greatest thing since sliced bread. So I'm now
> From: Jim Stephens
> I'm interested in whether this is a wound down or ongoing Dec material
> operation, or the operation of an e waste recycler.
> Vendor name on ebay is EFI. May have other aliases.
Oh, Efi! All hardened DEC collectors know about Efi (well, many of us do :-).
T
> From: Guy Sotomayor Jr
>>> We need to move our business and I have about a ton of
>>> classic cimputer junk in the SFBA that need to go or get scrapped:
>>> Symbolics 3645? (from Guy Sotomayer a few years back)
>>> PDP 11
> I stopped by and picked up some stuff from Pet
> From: Systems Glitch
> You need split I&D for 2.11BSD
ISTR reading that the network code runs in Supervisor mode, so you need that
to, technically (although all -11s CPUs with Supervisor also have I+D, and
vice versa).
Does the 2.9 include networking code? If so, it must use overlays l
> From: Chuck Guzis
> Well, okay--but then let's be period-correct. The PDP-11 dates from
> 1970, when, AFAIK, BBSes, if they existed, were far from what people
> think they were.
You're thinking of the -11/20, released in 1970. But that was only the first
PDP-11 model; the -11/23
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