Re: Cleaning an old keyboard
Hey, that spiel would be a good start to a great article on the CHWiki,
'Cleaning keyboards'! (Not sure if any of the other replies contained
anything worth picking up.)
Noel
So I just discovered that there are three wildly different variants of the
M7821 Interrupt Control card. More here, with images:
http://gunkies.org/wiki/M782_Interrupt_Control
I'll have to dredge around and see if I can find circuit diagrams for them
all; they are wildly different, the -C has
So, I have a copy of the maintenance manual for the DJ11; is this something
anyone needs?n If so, I'll move it up the scan queue.
Noel
> From: Evan Koblentz
> I know of two RP04 drives in the wild. One belongs to a private
> collector. VCF has the other.
Right, but does VCF need it scanned?
Oh, one other place that might have one: the MIT MC KL10 had a couple of
RP04's; when it was taken away to Scandanavia, they mi
> From: Pierre Gebhardt
> there seems to be a copy of the maintenance manual in the unibus-folder
> on bitsavers: EK-DJ11-MM-003_DJ11_Maint_Man_Aug76.pdf
Argh! I looked in that folder, but didn't see it! (And Manx says its not online,
either.)
> Would be worth checking the docume
> From: Al Kossow
>> This is documented in NASA's official history of Project Mercury, for
>> which it was invented.
> could you post a pointer to the document where this appears?
If the reference is to:
Lloyd S. Swenson, James M. Grimwood, Charles C. Alexander; "This New
> From: Josh Dersch
> descriptions of the PDP-11/45 DELPHI system
> ...
> moves on to Algol and LISP
I later became the 'owner' of that PDP-11/45 (our group at LCS traded an
-11/40, which EECS wanted for their DECSystem-20, for it).
That Algol and LISP were later moved to Unix V6
> From: Josh Dersch
> Any idea what ultimately happened to that 11/45?
MIT offered it to me as a gift, but I was a total idiot (and also didn't have
future vision), and as I was so busy with the IETF/IESG at the time (which
might have been the right call, given how the Internet - note the
Hi, does anyone out there have any DM11 documentation? The only thing I could
find online is the "DM11-BB model control option manual" (DEC-11-HDMBA-A-D) -
and it's the impetus for this request, actually.
One page 1-5, pg. 15 of the PDF, it has a diagram of which boards go into
which slots on the
> From: Paul Koning
> Some early machines, the PDP-6 I believe is an example, have
> "registers" in the ISA but they actually correspond to specific parts
> of main memory.
The PDP-6 and KA10 (basically a re-implementation of the PDP-6 architecture)
both had cheapo versions where
> From: Eric Smith
> Code can be executed from the MMU PAR registers on processors with
> 22-bit addressing (11/23, 11/24, 11/44, 11/70, and J-11 based systems).
My QBUS machine is apart at the moment, so I can't verify this before
posting, but I don't think this hack works on the J-
This is a long shot, but...
There was an Able Computer document at VCF Midwest, and through a
miscommunication, it wound up on the 'free' pile. Did anyone here get it?
If so, I'd like to try and get it scanned in, and made available.
The thing is that documentation for Able products is hyper-rare
> From: Christian Corti
>> we only have those for the UNIVERTER and QNIVERTER
> And what about the stuff on bitsavers?
That's where I got my copies of the UNIVERTER and QNIVERTER docs. I guess I
missed grabbing a few; and I see a few more have been added since I last
looked:
ht
> From: Jason T
> didn't know you were at the show. Thanks for coming out!
I wasn't! :-) This is via Paul A, who was there.
I don't recall where they were before they got free-piled (he told me who it
was who had it, but I had no particular reason to store those bits in my
memory).
I recently picked up a copy of "CTS-300 - DIBOL Language Reference Manual"
(because when I went to do a CHWiki page for the language:
http://gunkies.org/wiki/DIBOL
I could find almost nothing about it online); does anyone have enough of a use
for this that I should put it in the high-priority s
> From: Chuck Guzis
> Calling DIBOL "COBOL-like" is stretching things quite a bit.
OK, so I'll change it to "vaguely COBOL-like"... :-)
Seriously, though, there some high-level similarities, and not just
the purpose...
Noel
> From: Chuck Guzis
> One could argue that it's just as similar to FORTRAN (cf. computed GOTO
> and logical IF statements).
It probably worth pointing out that I never used COBOL, and have little
knowledge of it. So when one reads "it is vaguely reminiscent of COBOL, as it
has a 'Data
> From: Al Kossow
> These showed up on eBay, I'd been looking for them for over twenty years
As in, 'you all shouln't bid on those so I can grab them'? Or do you want
someone here to get them, and send you scans?
If the latter, people should co-coordinate so they aren't bidding against
e
> From: Jörg Hoppe
> did DEC construct 18bit mutants for a few PDP-11 peripherals to run
> them in KS10?
Yes and no. There were two 18-bit UNIBUS devices, but they were originally
done for the PDP-15 (DEC's last 18-bit machine). They were the RK11-E and the
RH11-AB. When the KS10 appe
> maybe the two can be jumpered together (the way the two UNIBI in the
> KD11-A/D can).
Actually, now that I think about it, that might be the reason for the order
of the UNIBUS A out B in/out slots in the backplane:
https://gunkies.org/wiki/RH11_MASSBUS_controller#Backplane_layout
One
> Although, with the 3 SPC slots - although they are on UNIBUS A, and only
> UNIBUS B has the 18-bit capability
Du. My brain finally turned on.
It is of course perfectly possible to run UNIBUS _A_ (where the SPC slots are)
in 18-bit mode too - although the _RH11_ can't use it that way
> From: Jörg Hoppe
> UniBone can be used in UNIBUS-A SPC slots in 18 bit mode without any
> extra adapters? And can emulate an RH11-C there
As far as I can see, yes.
> even if the RH11 is supposed to run in UNIBUS B?
Well, all RH11's have both UNIBUS A and UNIBUS B; under progra
> From: Eric Smith
> One version of the RH11 added a small FIFO (called a "silo" by DEC,
> IIRC) in the data path. I don't recall which suffix that was, nor
> whether it was the version used in the KS10.
Well, the -AB has the FIFO, according to the Revision J prints (September
1
> the Revision J prints (September 1993).
Ooops, typo: '1973'.
Noel
> From: Chris Zach
> The MSV11-QC board ... failed startup diagnostics with what looks like
> a stuck bit. .. now I need engineering schematics for that board so I
> can replace one of the 41256 memory chips. On the positive side it looks
like
> a pretty obvious stuck bit, jus
> From: Rob Doyle
> Your memory is correct. The RH11C was the buffered version of the RH11
Umm, both the -AB and -B have FIFOs - confirmed from the prints. (I have
an M7294 if we want to confirm that the prints aren't confused.) Now,
maybe the -C has a _bigger_ FIFO (e.g. large enough to
> From: Rob Doyle
> http://www.bitsavers.org/pdf/dec/unibus/RH11-C_Engineering_Drawings.pdf
Oooh, thanks ever so much. Not sure how I missed that when I looked on
BitSavers for RH11 stuff! Very illuminating - eventually! The M7294-YA seems
to be a manual ECO to the M7294; there's a detail
> From: Fred Cisin
> Is that message about 1) history of internet? (THANK YOU for specifying
> "internet", otherwise "computer to computer" involves much older history.
> ...
> those messages were sent on PRECURSORS to the internet, NOT on the
> internet.
Did you mean "int
> From: Richard Pope
> Isn't the proper term for my network of computers here at home:
> internet
It depends on what's inside it.
An 'internet' is a collection of disparate networks tied together with packet
switches which examine the internet-layer headers of the packets passing
thr
> From: Nigel Johnson
> No, your home has an intranet!
Can you please provide a crisp, definitive, technical definition of what an
'intranet' is (similar to the one I just provided for 'internet' - "disparate
networks tied together with packet switches which examine the internet-layer
hea
> From: Brent Hilpert
> Roughly, IP took care of a common addressing scheme and a common
> packet presentation, TCP took care of end-to-end flow control.
Yes on IP, but TCP's main function is reliability - much of the mechanism of
TCP (sequence numbers, acknowledgements, timeouts and
Ooops, editing error:
> Although one could build a system which has aggregatable addresses, used
> for path selection, but hid them from the hosts, and used an 'invisible'
> mapping system to translate from them to the aggregatable 'true'
addresses.
Should have been "to translate fro
> From: Jay Jaeger
> CCITT Group 4 lossless compression
That's very good indeed. I scan text pages in B+W at slightly less resolution
(engineering prints I do higher, they need it), but compressed they turn out
to be ~50KB per page, or less - for long documents (e.g. the DOS-11 System
Pro
> From: Guy Dunphy
> JBIG2 .. introduces so many actual factual errors (typically
> substituted letters and numbers)
It's probably worth noting that there are often errors _in the original
documents_, too - so even a perfect image doesn't guarantee no errors.
The most recent one (of
> From: William Donzelli
> Can the DEC M8291 CR11/CM11 controller card work with a DEC branded
> Documation M600 reader as well as the M200?
Should do; the 'CR11/CM11 system manual' (DEC-11-HCRMA-C-D) mentions it,
although it doesn't provide extensive coverage.
I guess that version o
> From: William Donzelli
> My manual only mentions the M200, but it may be an early edition
What is it, and what date is it? DEC-11-HCRB-D, avilable online, is
March, '72. DEC-11-HCRMA-C-D is June, '73.
I see that EK-CR11-TM-004 is also available online:
http://bitsavers.informatik.u
> From: Thomas Moss
> Probably a long-shot, but I'm looking for a DECtape drive for my
> PDP-8/e.
Long shot indeed! DECtape drives are one of the rarest DEC peripheral, and
un-surprisingly, one of the most valuable. (A TU56 sold on eBait for $7K back
in 2015.)
Would a TU55 do, or d
So I've decided to try and build up a KE11-A Extended Arithmetic Element. I
have most of the boards (although I*m missing a M234 Register dual-width
board, if anyone has one).
The main thing I'm missing at this point is a backplane. I do have a BB11
(which came out of an old piece of data acquisit
> From: Jay Jaeger
> Yeah, info does seem to be scarce. Not even in my LEVAX fiche set.
My fiche set has the Technical Manual, and also (in the wirelist
section) the wirelist.
Not sure how to get it to you, though. I stuck it in my industrial-grade
scanner at its highest resolution; no
Please make sure your messages to CCTalk have a Subject: line, otherwise
they end up being 'un-clickable' in the archive, like this:
http://www.classiccmp.org/pipermail/cctalk/2020-February/date.html
It's possible to hand-edit the URL's to see them, but it's a PITA!
Noel
Does anyone have an -11/24 in a BA11-A 10-1/2" mounting box? If so, I'd love
some images of the internals, if possible!
I ask because the BA11-A doesn't use the usual MATE-N-LOC connector for
sending power to the CPU; instead it has bus bars, and in the -11/44 (the
usual denizen of this box), the
So, a while back someone had a broken MSV11-Q QBUS memory card, and needed
info on them. I said I'd provide same, but then got distracted. Well, I
finally got to it, and it's been added to the CHW page for them:
https://gunkies.org/wiki/MSV11-Q_QBUS_memory
It includes a table which says which c
> It includes a table which says which chip each bit in the memory is
> stored in
Oh, there's an entry (well, actually two) missing from the table, which is the
parity bits (2; byte parity); I'll work them out and add them. (I know, by
elimination, which two columns of chips are the parit
From: Tom Uban
> Does anyone have information on having a replacement PDP-11/05 key made?
Google is your friend; here:
https://gunkies.org/wiki/PDP-11/05#Keys
I don't recall if there's anough info there to create new keys without an
original to copy. At one point I made a run of cop
> From: Ian McLaughlin
> I can confirm that about 6 months ago I gave this very information to
> our corporate locksmith, and he was able to make a key for me that
> works.
Thanks for the confirmation that that info is sufficient to produce a working
key. I have updated the page t
> From: Chris Zach
> in place of my quad height 11/73 CPU with 2mb memory.
Sorry, which exact quad-height CPU card?
{As someone else has previously pointed out, the /73 and the /83 are basially
the same machine (roughly the same CPU board - KDJ11-B, perhaps with different
clock crystals
> From: Mark Matlock
> Are you able to use a Qbus MTI controller in the 11/84's Qbus section
> of the backplane? This is something I've often wondered about but never
> tried.
I looked into this in some detail, but I don't know:
https://gunkies.org/wiki/KTJ11-B_UNIBUS_adapter#Q
> From: Jerry Weiss
> uNOTE # 028 indicates that MSV-11 JB/JC (M8637-B/C) doesn't do block
> mode.
I went and looked at uNOTE #28, after I found it (it's not in the initial set
of uNOTEs, but in the second set - the so-called 'OEM uNOTEs"; note that the
numbers were re-used between th
> From: Chris Zach
> Just checked the configuration and block mode DMA *is* off.
Interesting. So it's not bklock-mode on the QBUS which is screwed up, but
normal QBUS transfers. That jibes with the comment abour "gate array
incompatibilities" (which I take to mean "errors" :-).
> wa
> From: Jerry Weiss
> Sorry about the uNOTE confusion..
No problem, it only took me about a minute to find the right one; my note was
to warn other people who didn't know about the number duplication.
> If you look at the Memory Comparison table in this OEM uNOTE, it only
> lists
> From: Chris Zach
> We have to move fast though, this needs to be cleaned out. How can
> people help me on this?
I'm sure there must be institutions that would love to have the PERQs; they
were very important machines, historically, and are quite rare.
Alas, although I'd normally be
Wow:
https://www.ebay.com/itm/353062352448
I've read manuals for these, but I've never even seen a picture of one before.
Noel
> From: Bob Smith
> saw a comment that this belonged to CJL.
Chris Lindblad? Sorry, I'm drawing a blank on someone with those initials who
is connected with the LINC.
> From: Jon Elson
> Wow, those were fairly rare back when, and now there may only be a
> couple in existen
Hi, a heads-up on sending expensive items via FedEx. They appear to have a new
policy, limiting honouring insurance coverage; so, in my opinion, they are
now unsuitable for shipping valuable items.
Data point 1: a couple of months back, I bought a PDP-11/40 on eBait. It was
shipped via FedEx in tw
> From: Paul Koning
> I suppose they still charge you an insurance fee according to what you
> declared as the value?
Yes, IIRC.
> This seems like a pretty clear case of fraud, and you should report it
> to the authorities.
Well, at the time, I thought it was just a local ma
So, I've come across an odd book that might interest some here: "Achieving
Accuray: A Legacy of Computers and Missiles", by Marshall William McMurray.
The first couple of chapters merely re-tell the story of earliest computers
(pre-elecronic and electronic), up through the IBM 701, Elliott 401, NC
Hi, I'm looking for documentation on the MSV11-R; there's next to nothing
online. (An -11/84 manual gives config, but that's all I cam find.) There is
an 'MSV11-R User Guide' (EK-MSV1R-UG), but it's not online; I don't suppose
anyone out there has one?
I'm trying to confirm an online report that i
> From: Chris Zach
> http://www.aceware.com.au/acms/images/Invent/GeneralRoboticsMSV_11R.jpg
I don't know what that is, but it's not an MSV11-R. Here:
https://gunkies.org/wiki/File:MSV11-R.jpg
is an MSV11-R.
> Maybe it's PMI memory without ECC? I count 18 bits across which seems
> From: Aaron Taylor
> I can confirm that the DEC MSV11-R is a PMI card. I own two and have
> used them with my KDJ11-B. ... the board is recognized as PMI by my
KDJ11-B.
Also, in a fairly amazing bit of sleuthing, Jerry Weiss found (in some of the
early PR versions of the -11/84 TM)
> From: Dwight Kelvey
> There was a fellow that made a relay logic that could play tic tac toe
What's with these new-fangled devices using _electricity_ anyway? :-)
In high school, my math teacher (I think it was) used a couple of matchboxes
and some beads to create a TTT device; he 'pro
> From: Stephen Buck
> Looking for a pair of DEC RL02 drives, working or otherwise, for a
> PDP-11 restoration destined for a local computer museum
Well, there's this:
https://www.ebay.com/itm/264277971437
It's an RL01, not an RL02 as you were enquiring after, but RL02's are quite
So I guess someone:
https://www.ebay.com/itm/324151272982
is a majot PDP-6 fan
Noel
> From: Fred Cisin
> we can start by considering the 4004. 1971. ... Then came the 8008,
> with EIGHT bit data bus, and 14 bit address bus (16K of RAM) ... It is
> important to note that each Intel chip consisted of "minor" modifications
to
> the previous one.
I know you didn
> From: Bill Degnan
`
>> I think I have a spare set of boards for the controller.
> I might be interested if no one else wants this.
You'll need a backplane too - and that's non-trivial. (I'm in the process of
producing one for a KE11-A.) The RK611 is a 9-slot (although several slots
> From: Jon Elson
> As far as I know, there was no VM/360. There WAS VM/370, which was out
> in the early 1970's
CP/67, which was a semi-product, and ran only on 360/67's, was basically the
same functionality as VM/370. (I get the impression that the code was
descended from CP/67, but
Love the title on this:
https://www.ebay.com/itm/184317705963
eBait auction: "16K Sense Inhibit Board .. VAX 6000, VAX-11/730".
Yeah, core on a VAX! And such a deal, a mere US$400!
Noel
This eBait item:
https://www.ebay.com/itm/202989416368
has a number of VAX-11/785 manuals, including /785 Hardware User's Guide. A
bit outside my scope, but /785 docs are very rare (Bitsvers only has prints)
so a VAX person should grab this and then scan them.
Noel
> From: Paul Koning
> airfight and any number of other multi-user games -- a thing made
> popular by PLATO and possibly originated there.
What was the date on that? Multi-player MazeWar on the Imlacs/ITS at MIT was
running before 1976 (I played it about then), but I don't recall exact
> From: Camiel Vanderhoeven
> I know Intel made the in-4011 for the PDP-11, but I never saw a picture
> of it.
Was it UNIBUS memory, or what? It doesn't seem to be in that table of early
Intel products.
BTW, speaking of Intel PDP-11 memory, I have this:
http://gunkies.org/wiki/F
https://www.ebay.com/itm/224058116598
Noel
> From: Peter Dick
> As I expect you know, RSTS was 'born' on 11th June 1970 as shown when
> you print DATE$(1%) ...
> This means RSTS/E, the Greatest Operating System ever, has just turned
> 50 years old.
Err, I expect that that was RSTS-11 in June, 1970, not RSTS-E. Since RS
> From: Paul Koning
> RSTS/E of course has a bunch of new stuff in it to deal with mapping,
> but the bulk of the code carries over from RSTS-11.
I was assuming that the basic intermal environment was sufficiently different
that not a lot of the OS-level code could carry over, but I g
> From: Peter Dick
> Question: how do the three of you (Noel) cctalk@classiccmp.org and Paul
> Koning fit together?
CCTalk is a mailing list for people who collect antique ('classic') computers;
Paul and I are both members. I collect PDP-11's (I used them in school from
'72 to
> From: Will Senn
> I know some of y'all were there (Noel)
I'm you're huckleberry (sort of; I didn't work on building the ARPANet, but I
built a number of boxes which were attached to it, later).
> I'm looking for the ARPANET Protocol Handbook
I have a hardcopy; the January 1978 ver
> From: Steve Shumaker
> NTRL has 3 published versions listed with two available as pdf downloads;
> https://ntrl.ntis.gov/NTRL/
Good find! The ADA052594 one is the one I have. The other one has older
versions of
some things.
So I won't need to scan anything; but I will put up a mac
> I will create a page which lists the contents of the APH .. I'll email
> the list with the URL once I get it up.
OK, it's at:
http://mercury.lcs.mit.edu/~jnc/tech/arpaprot.html
I'll link to it from all the usual places (e.g. the 'ARPANET Technical
Information' page) later. The main
> hyperlinked in; I'll do the RFCs later. Also, it's missing a few TELNET
> entries, I'll add them later too.
All done.
Also, I remenbered that Dave Walden made the three main ARPNET papers
availalble online recently, so I added links to them on the 'ARPANET Technical
Information' page.
> From: Peter Van Peborgh
> From: Antonio Carlini
> From: Jim Stephens
Everyone: please DO NOT send messsages to CCTalk/CCTech with no Subject: line
in the header: that results in un-linked, and thus un-clickable, entries in
the archive (which some of, like me, use to read the list),
After having a run of almost half a dozen IDE hard drive failures recently in
a short period of time (on my older desktops which use them, I've decided that
I should see if there's an IDE emulator (using SD cards) available I could
switch to. (I'm not sure why I had so many failures in such a short
> From: Lars Brinkhoff
> There are emulators for the CADR Lisp machine ... There's no emulators
> for the CONS, but I claim it would be interesting to attempt one.
I'm not sure CONS ever ran as a stand-alone system; I suspect (but don't
recall for sure; RG, TK or Moon or someone could
> From: Lars Brinkhoff
> it was AI rather than MC. As I'm sure you know, AI had the Rubin 10-11
> interface
Really? (I expect you're correct, mind.) I just remember one day MC wasn't
running as normal, and I was told it was because CHEOPS was in some
tournament, and MC had been taken
> From: Mattis Lind
> Unfortunately I am not having any lutfisk this year. The rest of the
> family is not very fond of it.
I"m glad to see there are _some_ non-crazy people there! :-)
Anway, I can way top that - the tradition Bermudian Christmas dish is cassava
pie: make that wrong
> From: Paul Koning
> Here's what it looked like
Not having RT11, I embedded this in a small stand-alone program (which took a
little work, Unix assembler being rather different :-), so I could see it (it
wasn't obvious from the code what it did).
Pretty clever, to get that complex a pa
So, I've been making wooden racks to hold a lot of my DEC boards, and I've
finally come up with a nice design for one, which holds quad boards:
http://ana-3.lcs.mit.edu/~jnc/tech/jpg/QuadRack.jpg
which holds them vertically.
It's much better than the dual rack next to it, which holds them
hori
> From: Paul Koning
> RSTS-11 V4, which had a major reliability problem ... As part of trying
> to keep the customer placated, DEC supplied full OS sources, 5
> dectapes. ... We printed them ... I still have copies of those files.
Is that version available online? If not, maybe an
> From: Michael Zahorik
> a dozen or so spare boards for my PDP8E. I was wondering about how to
> store them. Some guys recommend some poly bags, others say it is
> important to protect against humidity. ... have you had any failures
> while in storage?
Well, i) most of my boa
> From: Peter Corlett
> since we have computers with multiple gigabytes of RAM, it makes little
> sense to restrain one's use of them to a fraction of the capabilities,
> except as an intellectual exercise.
For data, sure. (It's amazing how big even images can become, as the
resol
> From: John Welch
> SAV -- SOFTWARE CONFIGURED FOR ENABLE HARDWARE WHICH DOES NOT RESPOND.
> HALTED.
> Does anyone have any hints on how I can guess what I need to add?
Well, Able made a thing called an 'Able ENABLE' which allowed use of more
than 256KB of physical memory on any
> From: Michael Zahorik
> Thanks for responding.
Sure. Not sure how much use it was, but...
> I do like your wood working.
Thanks..
> may give it a try. Should not be very difficult.
No, as long as you have either a radial arm saw (best), or a table saw
(preferably with a 'sl
> From: David Bridgham
> I could ask for a lot more really but that's pretty good.
IMO we're 'over the hump' on the prototype phase of the project. The complete
QBUS interface (including DMA and interrupts) are done, and very thoroughly
tested, and now we have the SD interface up and runn
> From: Paul Koning
> The only asynchronous computer I can think of is the Dutch ARRA 1
Isn't the KA10 basically asynchronous? (I know, it has a clock, but I'm
not sure how much it is used for.)
The thing is I recall reading (where, I don't now remember) that the CPU is
organized with 'g
> From: Mark J. Blair
> I wonder if it might also be useful in any of the QBUS MicroVAXen?
Hardwarewise, it should be fine. Softwarewise... well...
The issue is that we're currently only planning to emulate the RK11 and RP11,
because we're not up for the hassle involved in emulating mor
> From: Jim Stephens
> I had a meeting with Ken Omohundro on 12/7 and will be having dinner
> with him again soon. I'll ask him about it. I know he doesn't have any
> records left, but I could take him your notes and see what he recalls.
Thanks very much for that offer; we do thin
> From: John Welch
>>> SAV -- SOFTWARE CONFIGURED FOR ENABLE HARDWARE WHICH DOES NOT RESPOND.
> I can boot RSX from a different device (or RT-11, or unix maybe) and
> then mount this RL02 pack and go exploring through its contents. Is
> there a possibility that I may find what
> From: Toby Thain
> If the documentation is good enough, people in the community will be
> able to provide the software.
You mean, host drivers?
Yeah, that documentation will be pretty trivial: 'there's this extra
register, just like the one in the RLV12; the top 6 bits of the DMA m
> From: Ethan Dicks
> The rod is also smaller by quite a bit, but I don't have one in front
> of me to measure.
The two feet are quite different. The smaller one on the extender is 5/16"-18
(i.e. UNC Coarse thread); the larger one under the cabinet is 1/2"-13.
Replacements can easily
>> From: Jim Stephens
>> I had a meeting with Ken Omohundro on 12/7 and will be having dinner
>> with him again soon. I'll ask him about it. I know he doesn't have any
>> records left, but I could take him your notes and see what he recalls.
> Thanks very much for that offer;
> From: Steven Malikoff
> Using the new bolt info, it's refined a little more:
I just took a quick glance at this, and noticed on major thing that's off:
you're showing the bottom side of the stabilizer foot as at right angles to
the vertical of the rack; it's not. See here:
http://ana
> From: Steven Malikoff
> That's the first actual photo I've seen of the foot, and I see what you
> mean.
Oh, I can take more, then; let me know what you need.
> Let's regard the inner vertical surface where it mates to the rack as
> the normal surface.
Right; that's our re
> From: Lars Brinkhoff
> Richard Cornwell wants to implement DL10 for his KA10/KI10 simulator,
> but he doesn't have any documentation for it. Any leads?
Well The "decsystem10 System Reference Manual (DEC-10-XSRMA-A-D) -
available online:
http://bitsavers.org/www.computer.mus
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