On 01/09/2022 14:31, Kenneth Gober via cctalk wrote:
On 5.25" diskettes punching a notch to enable use of the second side
worked due to 2 factors:
First, the index hole was commonly unused on 5.25" systems so it
didn't matter that the index hole was in the wrong place when the
diskette was flipp
On 04/11/2022 17:47, Jonathan Katz via cctalk wrote:
Hi everyone!
I'm curious; other than Wikipedia what do we know about Whitechapel
workstations? Do any of us have some working in our collections, with
software, disk dumps, etc?
Jim Austin has 4 or 5 MG1s and a CG1 in his collection.
https:/
On 24/12/2022 17:02, Chris via cctalk wrote:
Don"t know what an Elan is. I do seem to recall suddenly an Indy with no
graphics output, intended to be used as a headless server.
That was a Challenge. the Indigo Elan is an Indigo with a particular
higher-end graphics card.
I still have an
On 04/02/2023 14:37, Glen Slick via cctalk wrote:
On 2023-02-03 22:48, Chris Zach via cctalk wrote:
Is it just the ROMs, or also some HW changes?
Do we have backup of the newer versions?
http://www.dunnington.info/public/DECROMs/
http://www.dunnington.info/public/DECROMs/ROMlist
It's just th
Hi, Ethan,
Whereabouts are you? I'm in York, UK, and I have more than one spare
BBC Micro. I don't have an A3010 but I do have an A3020 (red function
keys) if that's of interest.
On 09/02/2023 16:13, Ethan O'Toole via cctalk wrote:
Looking for an Acorn A3010 or A4000 + KB/Mouse, happy to r
On 23/04/2023 17:54, Fritz Mueller via cctalk wrote:
I’ve been eying the dishwasher, for the subset of flip chips that that are just
DIP logic, carbon comp resistors, and ceramic bypass caps, anyway. But I
haven’t been brave enough to try that yet... Most of the logic here has date
codes t
On 23/04/2023 22:52, KenUnix via cctalk wrote:
Pete,
Did the 8E have core or solid state memory?
It had both, but I didn't put the core boards in the dishwasher. I
figured they might be too delicate for that, so I rinsed them by hand in
the kitchen sink.
I should have said that in my orig
On 24/04/2023 06:45, ED SHARPE via cctalk wrote:
Bad link Zane I get a weird screen from the timeEd#
Delete the strange character after the last "/" and it will work:
https://www.seattletimes.com/business/boeing-aerospace/after-3-years-flying-heritage-museum-to-reopen-in-everett/
--
Pete
Pe
On 25/04/2017 08:51, jim stephens via cctalk wrote:
On 4/25/2017 12:45 AM, ben via cctech wrote:
I would go for distilled water, tap water could have chlorine it
it.
Not enough to do any harm if you dry it sensibly; besides, it's more
likely to be choramines these days, not chlorine as suc
On 25/04/2017 10:08, jim stephens via cctalk wrote:
On 4/25/2017 1:39 AM, Pete Turnbull via cctalk wrote:
"Little residue" would be more accurate, and some of that residue
will be water (look up "azeotrope") - plus you need a lot of
alcohol for something the size of a PD
On 25/04/2017 15:55, Tapley, Mark via cctalk wrote:
On Apr 25, 2017, at 8:51 AM, allison via cctalk wrote:
Even after all that I'd still dry it with a little heat (oven at 180F or a
clean empty
container in the sun.
Irrelevant for backplanes, but for circuit boards, would any UV-erasable PR
On 25/04/2017 17:46, js--- via cctalk wrote:
On 4/25/2017 11:34 AM, Pete Turnbull via cctalk wrote:
Definitely. It takes a while, but even behind window glass (which is
barely transparent to short wavelength UV) EPROMs can eventually lose
their content. It happened to a friend who had a
On 28/05/2017 23:45, Mazzini Alessandro via cctalk wrote:
I tried to clone a boot drive ( on a bigger one ), using one of the
scripts on nekochan. The disk was initialized , labelled then
formatted by the script, and cloned. The data is present if I mount
it
The issue starts when I change the i
On 03/06/2017 17:57, Dave Wade via cctalk wrote:
I have in my loft 2 x RL02 with Packs in place and 1 x RX02 drive, which I
got with various other PDP-11 bits. They have been roughly treated and
probably don't work, but they take up a huge amount of space, and I can't
see me ever getting the ti
On 06/06/2017 23:58, David Griffith via cctalk wrote:
Often when I comb through old documentation, I find that the years,
heat, and pressure appear to have remelted the toner such that pages get
stuck together. Is there a danger of that happening with modern toners?
Yes. Toner composition
On 20/06/2017 09:06, Aaron Jackson via cctalk wrote:
I think I have seen this too, and was actually beginning to wonder if a
box with the clunky connector was the only "official" way of doing it. I
believe I read somewhere about bypassing the connector on the back of
the drive and going straight
On 25/06/2017 11:46, Rob Jarratt via cctalk wrote:
I have done a bit more tracing of components and have come across a
possibly anomaly. The signal that won't go low enough goes to the
input (pin 2) of a 74LS125 buffer.
As soon as I saw "74LS125" I thought, "Oh, yes, another one". That's a
f
On 07/08/2017 18:37, Rod Smallwood via cctalk wrote:
So to-morrow connect up a terminal that will do 110 baud and try an echo
test.
Next part is interesting. There should be a way to fake a reader / punch
and feed in tape images.
There is. Look on Kevin McQuiggin's site:
http://highgate.co
On 19/08/2017 00:46, Adrian Graham via cctalk wrote:
It doesn’t beat a listing from 15 or so years ago from a mate of mine who
advertised a polo mint (lifesavers to our US types) in a clear case as ‘mint in
box (mint, in box)'
Who remembers the sale of the air guitar?
--
Pete
Pete Turnbull
On 30/08/2017 05:29, Douglas Taylor via cctalk wrote:
I'll send along a picture of the rear of the back plane. I'm getting
the impression I can't do what I want with the old cpu cards, M7270
and M7264.
I had really hoped to be able to put together a simple system to
demonstrate the difference
On 30/08/2017 11:19, Peter Corlett via cctalk wrote:
The EU voltage "harmonisation" was mostly a paper exercise.
The only real effect I observed is that dodgy British power distribution
companies can sweat their assets more and let the voltage sag further in the
extremeties of their network than
On 30/08/2017 11:44, Camiel Vanderhoeven via cctalk wrote:
I believe that is true for some countries, in other countries they did
increase the voltage. I know it happened in the Netherlands, because we
measured the voltages at our university¹s datacenter over that period.
We (I'm in the UK) mea
On 30/08/2017 17:02, Douglas Taylor via cctalk wrote:
On 8/30/2017 5:53 AM, Pete Turnbull via cctech wrote:
Hope this helps...
Yes, it does help. There are 3 issues that I am trying to resolve:
1. Running in 32kb of memory. If I use the 32kb MXV11 can I run RT11
V5.3?
If it works in SIM
On 10/09/2017 20:55, Rob Jarratt via cctalk wrote:
I want to replace a PLCC84 surface mounted chip and take the opportunity to
socket it.
I have looked at some YouTube videos to see how others have done this. I am
thinking that the best way is going to be to pre-solder the pads on the
socket, pl
On 01/10/2017 20:46, Tom Gardner via cctalk wrote:
As best I can tell WD began publically using the term IDE for its drives sometime around 1990
Nope. I recall conversations with a small-scale developer in the UK who
was creating addons and accessories for the company I worked for (Acorn
Co
On 03/10/2017 01:04, Tom Gardner via cctalk wrote:
Unfortunately there is no documentation to support Pete's recollection - if
there is any I would like to see it.
Well, actually, there is, though not for quite as early as I had those
conversations. The company I was referring to was HCCS As
On 07/11/2017 15:09, william degnan via cctalk wrote:
The seller in the past sold an 8i I believe, it's probably an 8i.
Bill
On Tue, Nov 7, 2017 at 10:00 AM, Dave via cctalk
wrote:
Can you tell which PDP8 this goes with? Would an 8/e panel fit?
Dave
It's an 8/e (of which I have two, and a
On 02/12/2017 09:11, Mattis Lind via cctalk wrote:
2017-12-01 19:16 GMT+01:00 Bill Gunshannon via cctalk
I am trying to bring some of my old PDP-11's back to life. Does
anyone have or know of a source for PROM Images? I need the
images for the M8189 (11/23+) and would also love to get the
imag
On 29/01/2024 20:45, William Sudbrink via cctalk wrote:
Sellam Abraham wrote:
I think you were fine. That's how you discharge them anyway. You
were just missing the grounding wire :)
I'd rather not be the electron sink In this case. I've never taken a
hit off of a CRT have you?
Yes, fro
On 21/11/2018 22:46, Bill Gunshannon via cctalk wrote:
On 11/21/18 5:19 PM, Fred Cisin via cctalk wrote:
Ed,
It is YOUR mail program that is doing the extraneous insertions, and
then not showing them to you when you view your own messages.
Seriously, YOUR mail program is inserting extraneous s
On 06/12/2018 11:44, Tony Duell via cctalk wrote:
On Thu, Dec 6, 2018 at 11:19 AM Liam Proven via cctalk
wrote:
On Wed, 5 Dec 2018 at 23:12, Chris Hanson wrote:
It’s a Sun-2 so it’s not really arguable whether it’s the first ever Sun
workstation: It’s not.
But I am mildly curious what yo
On 06/12/2018 12:28, Liam Proven via cctalk wrote:
Looking up the SUN-1, I see that it lacked a graphics adapter, and was
a text-only machine. I didn't know that. That alone means that it's
not really what I think of when I think of a Sun workstation: no
windowing system means that for me it's no
On 07/12/2018 09:59, Rod G8DGR via cctalk wrote:
OK now I need a little help.
Does anybody know of a terminal emulation program that will simulate the reader
on an ASR33?
I know about RIM and BIN loaders but how and what to feed them I have long
forgotten
For a Unix or Linux machine, there
;-)
TTFN - Guy
On Dec 7, 2018, at 4:57 AM, Pete Turnbull via cctalk <
cctalk@classiccmp.org> wrote:
On 07/12/2018 09:59, Rod G8DGR via cctalk wrote:
OK now I need a little help.
Does anybody know of a terminal emulation program that will simulate
the reader on an ASR33?
I know abou
On 07/12/2018 17:44, Jon Elson via cctalk wrote:
On 12/07/2018 11:22 AM, systems_glitch via cctalk wrote:
Indeed, unless you need character pacing.
Actually, with the correct settings of the serial port (xon/xoff or CTS
pin) the serial port driver should do this, too, so cat would work.
A P
On 07/12/2018 17:46, Jon Elson via cctalk wrote:
On 12/07/2018 11:38 AM, Rod G8DGR via cctalk wrote:
Oh good how do you set them to 110 baud?
Oh, WOW! Good catch, it only goes down to 300 baud! major screwup,
ought to be reported to the developers.
But wouldn't it be better to set the seri
On 08/12/2018 09:55, Rod G8DGR via cctalk wrote:
Nice try Josh - close – you have to change the crystal first and you can’t get
them.
Both Farnell and Mouser UK have suitable crystals. They don't have to
be the same physical size. I've changed several.
--
Pete
Pete Turnbull
On 08/01/2019 21:37, alan--- via cctalk wrote:
There is a special place in hell for spammers. There is an even more
special place lower in hell for web site builders that store plain-text
passwords rather than a one-way salted hash of a password.
Oh, there's a worse hell -- I hope -- for th
On 11/01/2019 19:59, Bill Gunshannon via cctalk wrote:
MicroPDP box has first three slots A-B-C-D to support PMI
memory and the rest are serpentine A-B.
Even giving a bus grant problem, I can't see that causing a CSR
error. I will probably have to dig out another box this weekend
just to be su
On 11/01/2019 20:51, Bill Gunshannon via cctalk wrote:
Listed what I'm using in the beginning of this thread.
Just CPU and Memory at this point.
OK, I didn't see that - sorry.
BTW, BA23 and BA123 microPDP-11 backplanes aren't the same - it's the
first 4 slots that differ in a BA123, and slot
On 12/01/2019 01:24, Zane Healy via cctalk wrote:
I’m pretty sure you could get the /23+, /53, /73, /83, and /93 in either a BA23
or a BA123. I have an actual badged BA23 pedestal for my /23+.
I'm fairly certain all microPDP-11/23+ systems were only sold in BA23
boxes, and I think microPDP-
On 11/01/2019 23:58, Ethan Dicks via cctalk wrote:
On Fri, Jan 11, 2019 at 3:51 PM Bill Gunshannon via cctalk
wrote:
Mine are all BA23. Wasn't the BA123 for the MicroVAX?
As sold, most likely. I don't think DEC ever configured any MicroPDP
systems in a BA123 but no reason it doesn't work.
On 12/01/2019 17:39, Bill Gunshannon via cctalk wrote:
One confusing part of this. Everything I have read today
seems to say that the only difference between the 11/73
and the 11/83 in a MicroPDP-11 was the memory used.
QBUS = 11/73
PMI = 11/83
Is this correct or not?
No, not really, but sor
On 05/02/2019 20:59, Chuck Guzis via cctalk wrote:
On 2/5/19 12:19 PM, Jack Harper via cctalk wrote:
I learned that very quickly - If you open the front of the Drive and
swing out the door with the electronics, drive motors etc, it is
definitely heavy enough to tip a rack.
I bolted the destin
Anyone know much about early MIPS workstations? I'm trying to get a
MIPS RS2030 to boot, without much luck so far. It goes through the
selftest but stops with the internal LED display at "5" accompanied by a
continuous beep.
Known problems:
- The Dallas DS1287 battery is flat; I can hack a
On 04/05/2019 01:04, Al Kossow via cctalk wrote:
On 5/3/19 4:25 PM, Al Kossow via cctalk wrote:
So I'd like to know what the RAM spec really is, whether I need to reprogram
the Dallas chip (and if so what goes
where), and what the diagnostic numbers on the internal LED mean. Anyone?
I th
On 04/05/2019 02:54, Al Kossow via cctalk wrote:
On 5/3/19 3:22 PM, Pete Turnbull via cctalk wrote:
Anyone know much about early MIPS workstations?
RISCos 4.52 src, incl monitor src up now under
http://bitsavers.org/bits/MIPS/RISCos
Once I can get the machine to stop wailing, that will be
On 04/05/2019 01:54, Al Kossow via cctalk wrote:
I see we all were talking about the M2030 around 3 years ago
http://www.classiccmp.org/pipermail/cctech/2016-May/017829.html
Some useful information in there, but I have the original MIPS keyboard
and mouse.
--
Pete
Pete Turnbull
On 04/05/2019 21:36, Dave Wade via cctalk wrote:
Paul,
VAX CD-ROMS generally are not ISO. ISO implies the ISO9660 file system, but
many VAX CD ROMS are in native VMS Files-11 format.
Some Windows utilities don't handle these so you need third party software to
create an image of these CD's.
Gen
On 06/05/2019 23:38, John Forecast via cctalk wrote:
The release notes on bitsavers indicate that the RX33 was not supported until
RT-11 V5.04.
On May 6, 2019, at 6:20 PM, Charles via cctalk wrote:
I have installed an RQDX3
But, when I boot the system (with RT-11SJ V5.01), it can't see t
On 13/05/2019 08:51, Matt Burke via cctalk wrote:
The protocol specification for MSCP and TMSCP is available here:
http://www.bitsavers.org/pdf/dec/dsa/mscp/
You might also want to look at the implementation of MSCP and TMSCP in Simh:
https://github.com/simh/simh/blob/master/PDP11/pdp11_rq.c
On 13/05/2019 23:47, Grant Taylor via cctalk wrote:
On 5/13/19 3:58 PM, Chuck Guzis via cctalk wrote:
I don't want to get into a long discussion; I merely wanted to point
out that you're unlikely to find the term "gaming adapter" in Linux
tech docs as they're not written for that audience.
Y
On 14/05/2019 14:17, John Foust via cctalk wrote:
At 03:02 AM 5/14/2019, Christian Corti via cctalk wrote:
On Mon, 13 May 2019, Grant Taylor wrote:
"Gaming adapters" take a wired computer and connect it to a wireless network.
That "adapter" has always been called a WLAN or wireless bridge.
Hi, Al.
This sounds slightly familiar - Jay contacted me a year or two ago about
a similar lot but the donor never got back to me.
Anyway, I would be happy to collect these on behalf of Jim Austin, for
the Computer Sheds: http://www.computermuseum.org.uk/
We'd be particularly interested in t
On 26/06/2019 22:52, Al Kossow via cctalk wrote:
On 6/26/19 1:00 PM, Dave Wade wrote:
Could we forward to the UK DecTech list?
Let's see if Pete Turnbull is able to make contact
I have, but I've not yet made any arrangement to collect it all. It
could be postponed until late July as the d
On 27/06/2019 07:53, Dave Wade wrote:
Pete,
Am I right in thinking Jim has no scanning facilities, and access is still
one weekend in two.
Pretty much.
--
Pete
Pete Turnbull
On 28/02/2017 22:06, Eric Christopherson via cctalk wrote:
At least in Gmail's web interface, I don't see reply and reply all having
any difference here; they both put both addresses in the To:. I'll have to
check how this works in an IMAP client later.
It may vary in different clients, but in
On 28/02/2017 21:23, Rich Alderson via cctalk wrote:
OK, it's official. I rarely criticize mail interfaces, because
they're usually mostly innocuous. However, today's change makes life
a lot more difficult.
Actually, I rather like it, because in my mail client (Thunderbird) it
shows as "From:
On 05/03/2017 03:34, Noel Chiappa via cctalk wrote:
> From: Josh Dersch
> I'm looking to rack up my PDP-11/34 so I can get it off my bench. I'd
> like to track down something similar to (if not exactly) the original
> rackmount rails (the ones that allow the chassis to pivot 90 d
On 07/03/2017 09:57, Christian Corti via cctalk wrote:
And BTW, what you are doing is not clever at all:
mo...@rodents-montreal.org
SMTP error from remote mail server after initial connection:
host MX-4.rodents-montreal.org [98.124.61.89]:
550-.de's whois server, whois.denic.de, is
On 07/03/2017 13:47, Christian Corti via cctalk wrote:
On Tue, 7 Mar 2017, Pete Turnbull wrote:
No, Mouse is right, it's broken:
Works for me (also from different networks outside the university network):
Interesting... I still get the same errors. Could it be
location-dependant in some wa
On 07/03/2017 15:07, Mouse via cctalk wrote:
$ telnet whois.denic.de 43
Trying 81.91.170.6...
Connected to whois.denic.de.
Escape character is '^]'.
whois -r uni-stuttgart.de
% Error: 557 Request not clearly specified
Connection closed by foreign host.
$
That's broken.
In that case,
On 08/03/2017 07:11, Tor Arntsen via cctalk wrote:
I tested 'whois -h whois.denic.de uni-stuttgart.de'
from Oslo, London, Tokyo, and it seems to work fine - I got all
expected whois output. Tested yesterday too.
Sounds like it may be the whois client instead - what OS are you guys
using, and whi
On 09/03/2017 07:25, Tor Arntsen wrote:
I did an strace and I can confirm that the Linux 'whois' client that I
used from those various sites sends '-T dn' (or actually -T dn,ace)
write(3, "-T dn,ace uni-stuttgart.de\r\n", 28) = 28
I can't see where this whois originates from, it has version
On 09/03/2017 09:50, Christian Corti via cctalk wrote:
On Thu, 9 Mar 2017, Tor Arntsen wrote:
I did an strace and I can confirm that the Linux 'whois' client that I
used from those various sites sends '-T dn' (or actually -T dn,ace)
I did a little research on that:
The '-T' option is passed t
On 12/03/2017 17:24, Noel Chiappa via cctalk wrote:
> From: Devin Davison
> This past week I managed to pick up a pdp 11/23.
Nice system; the CPU has the MMU and FPP
And it's a Rev.D (you can tell from the jumper layout), so full 22-bit.
you've got what's probably a 256KB
memory ca
On 16/03/2017 00:30, Philipp Hachtmann via cctalk wrote:
I have announced that there will be a kind of
handle for the boards this time... I went to my neighbour and showed him
some bits and pieces. He has a nice little workshop for concrete artwork
(https://www.fritzundfranz.com/) and spent a lot
On 24/09/2019 07:30, Philip Belben via cctalk wrote:
PS I wish people wouldn't say WD40 is not a lubricant. It is.
The problem is that it is quite a heavy grease - suitable for (say) door hinges
- but when it comes out of the can it looks like a fine oil
I do wish people wouldn't say WD40 is
On 25/09/2019 16:29, Noel Chiappa via cctalk wrote:
If the reference is to:
Lloyd S. Swenson, James M. Grimwood, Charles C. Alexander; "This New
Ocean: A History of Project Mercury"; SP-4201; NASA; Washington; 1966
It is indeed in that. My copy isn't to hand and if it's not inde
I've lost track of where the jumper settings are documented for the
MM8-E, and I've got five sets here that have all been changed one way or
another. Can anybody remind me where to find the settings for the three
EMA jumper links on the G111? I want to set at least one board set to
the lowest
On 29/10/2019 16:28, Chris Zach via cctalk wrote:
The real problem is I'm trying to put an RQDX3 in there instead of the
ESDI controller so I can boot off RX50's. And I have no idea which way
all the various ribbon cables are supposed to go. Will any 50 pin cable
work between the RQDX3 and the
On 28/12/2019 01:46, Paul Koning via cctalk wrote:
I can get one and test it with an Apple keyboard, but that doesn't sound right.
There aren't enough wires on a USB connector to allow you to speak the PS/2
protocol. And there are PS/2 to USB adapters (for old keyboards) that are the
same s
On 08/01/2020 18:06, Paul Koning via cctalk wrote:
Allowing accountants to do electrical engineering makes just as much
sense as allowing sociologists to do brain surgery.
Off topic, but allowing accountants to do accountancy isn't always much
better.
I recall the Christmas when our accountan
A few hours ago I started looking at three "smart" light switches that
need LEDs replaced, and switched on the soldering iron, and ... nope.
It's a Weller WP80 and it seems the sensor in the heating element has
died. I discovered that only after resetting and then dismantling the
control unit
On 06/04/2020 00:22, Jon Elson wrote:
On 04/05/2020 03:32 PM, Pete Turnbull via cctalk wrote:
A few hours ago I started looking at three "smart" light switches that
need LEDs replaced, and switched on the soldering iron, and ... nope.
It's a Weller WP80 and it seems the sensor
On 17/04/2020 17:52, Bill Gunshannon via cctalk wrote:
I found a backplane. It says
Digital on it but does not have an H- number. I also
don;t find it listed in any of the lists I can find on
the web.
It has 8 A-B slots and 4 C-D slots. the Four C-D are on
the bottom half of the backplane.
On 22/05/2020 17:21, Fred Cisin via cctalk wrote:
#> 3.0" drives (Amdek, Amstrad, etc.) use same connectors as "standard"
5.25", with "molex" power connector (I don't know what the CORRECT name
is for that connector).
It's part of the AMP (now TE) Mate-N-LOK series.
But, I have some 3.25" dr
On 27/05/2020 11:55, Peter Corlett via cctalk wrote:
It's better now, though. Price differences can be explained by delivery costs,
import duties, and VAT/sales tax. And in the case of 1977, middlemen who
exploit the difficulty in importing stuff oneself.
The USA is some sort of gravity well whe
On 18/06/2020 23:03, Eric Korpela via cctalk wrote:
I used to use netcat, but now I just watch an oscilloscope.
Reminds me of a cartoon in a HiFi mag several years ago. Enthusiast
talking to friend in front of dual 'scopes, "Why listen to it when I can
see it's perfect?"
--
Pete
Pete Turnb
On 18/06/2020 21:31, Paul Koning via cctalk wrote:
I did see something vaguely similar. Bell 202 modems are 1200 baud FSK, so on
a voice channel they normally are 1200 bps half duplex. They can also be
hooked up to 4-wire fixed circuits. But they have a reverse channel, good for
150 baud i
On 21/09/2020 12:41, Tom Hunter via cctalk wrote:
The problem I am seeing is that 3 keys ("h", "j" and "y") are permanently
pressed.
I'm not familiar with this keyboard, so despite having fixed lots of
other types, what I'm about to write is no more than musing and may be
inapplicable drivel,
On 06/01/2018 12:04, Steve Malikoff via cctalk wrote:
Using the measurements provided by Vince I've rejigged the drawing a bit and it
ought to be closer.
Looks good to me except...
I had thought the hole in the front corner of the H960 was for a front panel
pivot, but it seems the foot
does
On 06/01/2018 15:45, Pete Turnbull via cctalk wrote:
On 06/01/2018 12:04, Steve Malikoff via cctalk wrote:
Using the measurements provided by Vince I've rejigged the drawing a
bit and it ought to be closer.
Looks good to me except...
I had thought the hole in the front corner of the H96
Sigh. Third time lucky.
On 06/01/2018 16:11, Pete Turnbull via cctalk wrote:
Correction - it's 10-32. I found one of the screws, photo at
http://www.dunnington.cx/DEC/H960/kickplate/IMG_1006.JPG
No, as would be obvious to anyone looking carefully at the photo (or the
real thing!), i
On 07/01/2018 01:44, Chuck Guzis via cctalk wrote:
On 01/06/2018 04:54 PM, Pete Turnbull via cctalk wrote:
No, as would be obvious to anyone looking carefully at the photo (or the
real thing!), it's 1/4" x 20 UNC. I really must learn to think before
putting finger to keyboard.
On 07/01/2018 07:57, Steve Malikoff via cctalk wrote:
I can't find anything suitable on MMC
(https://www.mcmaster.com/#countersunk-head-machine-screws/=1b0p4yz
) so Chuck's probably right, machine them up. Maybe start from a long
5/16" shank hex-head bolt and put the countersink and 1/4-20 thr
On 23/01/2018 16:48, Grant Taylor via cctalk wrote:
On 01/23/2018 09:10 AM, Bill Gunshannon via cctalk wrote:
If you didn't locate the transceivers on those black marks you would
have had terrible performance as that affects collisions. Timing
(among other things like grounding) was very impor
On 30/01/2018 15:17, Tapley, Mark via cctalk wrote:
Does Isopropyl alcohol (um, same as propan-2-ol?) at 60C have enough vapor
pressure to be a flammability issue?
Yes. The boiling point of IPA is a little over 80C, and the flash point
of 70% - 80% IPA (which would be a common strength) is
On 17/03/2018 00:28, Charles Dickman via cctalk wrote:
So the PDP8/e used the KC8-EA programmers console which has
incandescent indicator lamps and the PDP8/f used the KC8-FL
programmers console which has LED indicator lamps.
I have two 8/e machines, one of which has the original panel with
in
After a recent power cut and a series of glitches as the power was
restored, one of my Indys suffered a PSU failure. It's a Sony APS-81
171W unit, SGI P/N 060-0008-001. I've found half a dozen damaged parts,
and I've identified a 150R 1W metal film resistor (R135), two trannies
(Q105, a 2SC43
On 26/03/2018 16:08, Camiel Vanderhoeven wrote:
4B would be a 2.2V zener; 4A would be a 2.0V zener, so that’s odd indeed...
That's the idea I had...
Except it's not a zener, or at least not anything like those. I took
one out of another (working) supply, and I can tell it has a forward
volt
On 26/03/2018 17:39, et...@757.org wrote:
I'm hoping I don't have to breadboard a 1kV supply and find a lot of
multi-megohm resistors to try and estimate the breakdown voltage - and
then guess at the forward current rating.
Is it possible to get the schematics?
If only! That question has be
On 29/03/2018 00:19, Zane Healy via cctalk wrote:
I think Bellows would be the only sane way to approach this. You
could do it with extension tubes, but they’re a pain. Another thing
to consider is a light source. You’re going to need a fair amount of
light, given the necessary extension to g
On 29/03/2018 03:15, Zane Healy wrote:
More and more, I view my Classic Computer collection as a hinderance
to building a proper darkroom. Oddly enough, the main purpose of my
PDP-11/44 these days is to hold a couple old enlargers that I don’t
use.
LOL! I wish I still had my De Vere 5x4 enla
On 29/03/2018 05:26, Shaun Halstead via cctalk wrote:
Using the wrong filament orientation can cause some weird artifacts
to appear on scanned images, because of the high magnification. I
strongly suspect that an attempt using an LED source would face
similar (and possibly worse) issues.
Light
On 31/03/2018 02:32, Kyle Owen via cctalk wrote:
I feel like I should know what this panel goes to...I found it in my garage
when cleaning up. Any ideas?
http://i.imgur.com/u4LMNqE.jpg
The shape, apparent size, and the bends and screw holes make it look
remarkably like the bottom panel of my
On 26/03/2018 17:07, Pete Turnbull via cctalk wrote:
Except it's not a zener, or at least not anything like those [ones
Camiel and Bob suggested]. I took one out of another (working)
supply, and I can tell it has a forward voltage of 0.2V, so it's
presumably a Schottky diode of som
On 17/04/2018 14:25, Warner Losh via cctalk wrote:
On Tue, Apr 17, 2018 at 7:12 PM, Johnny Eriksson via cctalk <
cctalk@classiccmp.org> wrote:
Bill Gunshannon wrote:
Many of us think that the advent of the x86 architecture is what led to
masochism.
... or masochism led to the x86 architectu
On 16 May 2018, at 08:37, Josh Dersch via cctalk wrote:
>I was fortunate enough to acquire a TU56 this week, along with a TD8E
>controller. However, the TU56 lacks the G888 flip-chips necessary to work
>with the TD8E; I know these parts are in short supply, but in the unlikely
>event that any
On 29/06/2018 14:31, Paul Koning via cctalk wrote:
Yes, and the specified distance limit for RS232 is quite short, 50
feet or so.
People have used RS232 over longer distances, of course, and gotten
away with it.
The RS-232-C standard doesn't actually specify a maximum distance.
Section 3.1
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