gram talks
directly to the hardware (a Motorola 68040 VME board
connected through a dual-port memory).
So, both of these systems require ANCIENT OS versions.
Jon
unobtainium nowadays!
But, those could easily be made by anybody with a lathe.
Jon
and currently lives in Brandon, Manitoba,
Canada. It has sat covered in plastic in a chemical
warehouse for the past 35 years. Where do people usually
post stuff like this other than here? Thanks!
»
The card cage has a VERY strong DEC look to it - probably
LSI-11.
Jon
has
240 FFs.)
You could also probably use a small FPGA to do this as well.
They usually have more FFs per cell than CPLDs.
Jon
really was not able to even GIVE them away!
Jon
document from
Honeywell for this system. The rest of my stuff is fairly
pedestrian.
I think I will take you up on this offer when it is ready.
My wife knows nothing of what this stuff is, and my kids
really don't know a whole lot either.
Jon
on earth, and
didn't consider the estate planning of the museum to be an
urgent matter. Sadly, he was wrong about that!
Jon
On 6/19/24 11:40, Mychaela Falconia via cctalk wrote:
Jon Elson wrote:
WOW, sad news!\u00A0
Yes, very sad news indeed! Lynn's story was my inspiration back in
2013-2014; after coming across her story and reading it breathlessly,
I started my own journey, following in her footsteps.
Yes
about a year ahead, and they were looking TWENTY years into
the future!
Jon
te program can handle that too.
Here is a faster tape copy program that takes advantage of
drives that can stream. This is definitely a VAX/VMS program.
Jon
ape.
It looks like this program came off a VMS system, but I
suspect it will likely compile on an RSX-11 system as that
is what it was derived from.
Let me know if you have issues with it.
Jon
On 6/12/24 09:52, Jon Elson via cctalk wrote:
On 6/12/24 03:02, Peter Corlett via cctalk wrote:
Fun factoid: despite modern x86 being clocked ~1000x
faster than ye olde
6502, there's not much in it between them when it comes
to interrupt
response time. If all goes well, x86 takes "
, there was teledeltos paper, that had a silver top layer
and a carbon layer below that.
A high voltage spark burned away the silver layer and left a
black image.
Jon
vel of low jitter with newer processors,
but we have found quite a few that can do it.
Jon
recently learned he was subsequently able to
recover the console from the said scrappers and reunite the parts to make
the system whole again. In any event, it was due some parts and much
effort to be made working.
Wow, that's quite a story!
Jon
On 6/8/24 15:17, jim stephens via cctalk wrote:
On 6/8/24 12:33, Jon Elson via cctalk wrote:
On 6/8/24 11:56, Vincent Slyngstad via cctalk wrote:
On 6/8/2024 7:43 AM, Jon Elson via cctalk wrote:
On 6/7/24 20:42, Vincent Slyngstad via cctalk wrote:
On 6/7/2024 6:19 PM, Jon Elson via cctalk
On 6/8/24 11:56, Vincent Slyngstad via cctalk wrote:
On 6/8/2024 7:43 AM, Jon Elson via cctalk wrote:
On 6/7/24 20:42, Vincent Slyngstad via cctalk wrote:
On 6/7/2024 6:19 PM, Jon Elson via cctalk wrote:
OK, I have to chime in here. I worked for Artronix
about 1972. The LINC computer
On 6/7/24 20:42, Vincent Slyngstad via cctalk wrote:
On 6/7/2024 6:19 PM, Jon Elson via cctalk wrote:
OK, I have to chime in here. I worked for Artronix about
1972. The LINC computer was developed at MIT for use in
biomedical research labs, and a bunch of people involved
with it later moved
d soldered in the chips by
hand. I wrote a series of diagnostics for them.
Jon
On 6/1/24 07:20, Liam Proven via cctalk wrote:
On Tue, 28 May 2024 at 19:32, Jon Elson via cctalk
wrote:
There's a story about a guy in Australia that found an
abandoned IBM 360/30 in a storage/shipper's warehouse and
dragged it to a rented office space that had no elevator. He
carefully
bought off-lease or
retired 360's. If I had lived in the Boston area, I would
likely have bought a National Advanced Systems 360 clone.
When NAS closed, there was a broker's warehouse full of
those systems that went for peanuts.
Jon
360/30 in a storage/shipper's warehouse and
dragged it to a rented office space that had no elevator. He
carefully dismantled it, dragged the pieces up to at least
the 2nd or 3rd floor, put it back together and got it running!
QUITE a story!
Jon
lder strap, and there was an old-style handset
with a coil cord connected to it. The bag was something
like 10 by 8 x 4" and appeared to be quite heavy. I am
pretty sure the thing was "personal" to her.
Jon
earch labs. The LINCs in this case cost about $50K, and
were built starting in 1961-62. The term "personal
computer" was not coined until a LONG time after.
Jon
, and weighed a LOT
more, and drew much more power. (300 vacuum tubes, 3000
Germanium diodes, drum memory.) but, one guy could program
it and run it.
The LINC comes in a close second.
Jon
older guys demonstrating PDP-8's,
Data General Novas and similar vintage gear. Then TONS of
TRS-80s, Commodores, etc. I'm 73, by the way.
Jon
attempts assume
you mean RS-232). The logic levels are 12 V or so, so not
quite TTL compatible.
Jon
On 5/4/24 10:21, W2HX via cctalk wrote:
I wonder how well that machine would do at bitcoin mining
Umm, it will consume about 4000 Dollars of electricity per
day! That is not counting the cooling required, just the
power input. that's about $15 million per year.
Jon
with paper tape. I then got a floppy drive, and later a
Memorex 10 MB Winchester drive. I did a LOT of programming
in assembly language but also did larger programs like cross
assemblers in Pascal.
Yes, I know a lot of people programmed in BASIC, but I
didn't find it very good.
Jon
editor on unix-related systems, (and several other editors
on Linux hide emacs from you, but it is the editing engine
down underneath.) AI geeks use Lisp for a variety of things.
Jon
On 4/30/24 12:37, Dominique Carlier via cctalk wrote:
Thanks for your response Jon :!
The technical documentation is available on Bitsavers here:
http://www.bitsavers.org/pdf/diablo/disk/model_40/81603_Diablo4xMaint_Apr75.pdf
But also here:
https://www.wang2200.org/docs/external
n wire or bad sensor conditioning circuit.
If you have drawings for this drive, it should be easy to
follow this circuit. If not, then you will have to find
drawings and tech info. Hopefully, bitsavers has what you need.
Jon
onal cents that get rounded back to the bank and sends
10% to their own account. Now, there are so many really
serious ways fraudsters can steal from banks and their
customers that nobody is too worried about that sort of
inside job.
Jon
and VAXes in assembly
language (Macro 11 and VAX Macro) I found the similarities
VERY strong. Just that the 32-bit architecture took the
constraints of the 16-bit PDP-11 away.
Jon
ignal, you could unplug a tri-lead
and connect it to a scope with a 91 Ohm terminator.
Jon
On 4/19/24 21:07, Fred Cisin via cctalk wrote:
Gee! Have sales gone down?
One more reason to use the 8080 subset when writing CP/M
programs.
Aren't there already some licensed second sources?
Harris also made an all-CMOS plug-compatible Z-80. I used
it in a low-power project.
Jon
wafers. That's their business model.
Jon
l key to tape system that
apparently was used as an off-line tape to line printer
unit. But, it was actually possible to use it as a key to
tape machine, too. I wanted it for the 300 LPM printer, but
had to use it in the tape to print mode to decipher the
protocol of the printer.
Jon
at
about 1200 LPM, which was pretty fantastic for the time.
But, I am glad to not have to deal with these things anymore!
Jon
On 4/10/24 11:19, Chuck Guzis via cctalk wrote:
On 4/10/24 08:17, Jon Elson via cctalk wrote:
The 360/20 had only halfword instructions, no float, no char strings.
But, main storage was 16 bits wide.
I'm not quite sure what you mean by "char strings", but SS instructions
MVC, MVN
Virtualbox or VMware. The model 44 had no channels, there
was only direct I/O (a set of 32-bit parallel input and
output registers) and a pair of cartridge hard drives inside
the CPU cabinet. Think DEC RK05s.
Jon
KB of main storage, and 360 and other instruction
set emulations could be loaded from cards. The boot loader
for the emulators was in the top 16 bytes (or maybe words)
of main storage.
Jon
about half of a 360 instruction set. But, it only had 4
registers.
Jon
half a block away. It took out an ethernet port on one
computer, and blew out a bunch of stuff on a burglar alarm I
had built. Both involved long wire runs.
Jon
connections form a big loop to accept magnetic
coupling.
Jon
On 3/17/24 11:11, Jon Elson via cctalk wrote:
On 3/17/24 09:13, Bill Gunshannon via cctalk wrote:
I have often wondered about the people we find in the
various
DEC Processor (and other) books. Were they models in staged
photo-sessions or were these candid shots from DEC
facilities
that a guy I used to work for, who later hired on at
DEC, was on a cover of one of the DEC publications. Yes,
the photos were certainly stages shots, but at least one
person was not a hired model.
Jon
eplace any
bad modules.
Jon
On 2/27/24 08:58, erik--- via cctalk wrote:
Hi Jon!
think the Bendix G-15 had cassettes for the 5-level tape
they used.
Aha, interesting! Did a short search, but have not been able to
find a picture of a casette. Just a pile of paper tape instead ;-)
https://images.app.goo.gl
reader that was designed for some kind of
cassette, but I never had the cassettes. But, it could be
used with open spools of tape.
Jon
and DEC Pascal programs, and took the
separate compilation directives like uses and $I. I was
able to get that program running on a Linux system in a few
days.
Jon
On 1/30/24 11:09, Jon Elson via cctalk wrote:
On 1/29/24 22:07, Bill Degnan via cctalk wrote:
Anyone have a VMEbus system they use at least
occasionally? If so, what
make/model/config?
Oh, also my Samsung-made pick and place machine has a 68020
to run the motion system, and a PC that runs
for the same purpose. We now use the Jtec XLM module, which
is an FPGA and memory set up to scan VME devices like ADCs,
and packetize the data to send out on a USB. So, at that
end, there is NO CPU.
Jon
as
designed FIRST TIME! It made me construct the program
logically. Sorry to hear of Mr. Wirth's passing!
Jon
lass. Some
people have reported success by placing foam tape to apply
pressure to the chip to apply a little pressure to the
connections when the case is closed.
Jon
ility.
The CDC Keystone 92185 could handle 6250 at full speed, and
was very reliable. There was a SCSI version available, but
the ones I had were Pertec formatted.
Jon
On 10/20/23 11:46, Ethan Dicks via cctalk wrote:
On Fri, Oct 20, 2023 at 12:11 PM Jon Elson via cctalk
wrote:
On 10/20/23 03:59, Michael Thompson via cctalk wrote:
The RICM has an empty 11/20 chassis and the power supply. All it needs is
the processor backplanes. Is there any chance you have
are bent so badly they can't be
straightened. From 11/04 or 11/34. Free if you pay shipping.
Jon
hat serves as a byte
clock. Making the Potter drive look like a Pertec drive
would be a fair bit of circuitry.
I assume the 727/729 series was similarly primitive, and
would need the same amount of logic to be used.
Jon
penmanship was never really
great) and typing is more error prone than before.
Jon
On 9/7/23 09:35, Mike Katz via cctalk wrote:
What time is setup Tomorrow (Friday, 8-Sep-23) for VCFMW?
They sent out a message to vendors that it would be open 10
AM to 10 PM, a few people would stay during the pizza dinner
to allow latecomers to load their stuff.
Jon
increment by 2, except where immediate operands are used.
Jon
question I contributed: "On what model and
under what circumstances will the PC increment by 1?"
The PDP-11 was introduced in 1970, so the 20th anniversary
would have been 1990, or 2000 would have been the 30th.
Jon
-compiler for Pascal,
cross-asm and debugger. I had all of these at one time. I
still have the Pascal manual and maybe some other stuff, as
well as a bunch of the development boards. I'll be hauling
all of that to the VCF-MW this weekend.
Jon
using PCBWay for several years. Quality is
excellent, and for small orders, like 5 small boards, they
have a much lower cost delivery method through DHL. I don't
know where the breakpoint is on size or weight.
Jon
have a DEQNA (I
think) at one time but don't have it now! That would make
things a LOT easier.
Thanks,
Jon
and type wheel when the right character passed by. It
printed at 30 chars/second. I looked for this model online
but didn't find anything.
Jon
- that might take a WHILE!
thanks,
Jon
with limited I/O. But, pretty quickly I got a floppy drive
and controller and started running CP/M with some sort of
video terminal.
Jon
, and it was raining when
we tried to load out our stuff on Sunday afternoon.
Thanks for any comments on what is really going on!
Jon
through its insualtion and
shorted against another pin.
Well, the mice pee in everything, and that is very corrosive!
Jon
you go this route, make sure you get the probe cables and
pods with it, they have essentially attenuator probes in them.
Jon
support, and does just
about any kind of statistical or logical operations on
columns of data.
Jon
.
WOW! Dave Ungar is a good friend of mine, I knew him from
Washington University (where I still work.)
Jon
iming of the head loading somehow was all
wrong and allowed it to start writing before the pad had
fully loaded.
Jon
would use on the PDP11 and
finally convert the numbers into 12bit integers.
I think audacity will convert to any arbitrary sample rate.
I'm not sure if there's a way to set the bits/sample, but if
you turn the volume down you should be able to just truncate
the data.
Jon
.
Jon
On 7/1/23 15:10, Sellam Abraham via cctalk wrote:
Don Lancaster passed away on June 7.
https://gilaherald.com/obituary-for-don-lancaster/
I hope his website is well preserved:
https://tinaja.com/
Wow, another legend! Yes, there is a lot of good stuff there.
Jon
t. You probably need something like that
if you're makng a 1m cable. But not for what the OP is trying to do.
I did make up an AUI cable out of 4 separate shielded twisted-pair cables.
Just tie-wrapped them together.
Jon
think you are right! memory fades over 40 years!
Jon
izing" it through the LSI-11 console
computer so you could mount it just like any other device.
Jon
to determine which cap is
bad. It could also be a power supply issue. Maybe a dummy
load that lightly loads all the voltages would be good for
testing.
Jon
heard of it. We did get it running on
VAX/VMS on a 11/780. The versions of TeX I have used
produce .dvi files, which can then be converted to .ps or .pdf.
Jon
of 16-bit words, od -d does 16-bit words
as decimal, and so on.
Jon
this.)
Jon
Limited
XT clone. The error is
ARC Turbo Board
X Turbo System Error # 04
ARC make me think of ARCNET, a very old network system.
Unless you want to connect with other machines running
ARCNET, then this card would be of no use.
(I could be wildly off base.)
Jon
ield DEFINITELY
causes visible artifacts on a mid-frequency VGA. A long
time ago I actually had to make my own VGA cables with HD15
connectors and RG-178 cable, because stock cables were total
crap!
Jon
a few
years ago I resurrected a pretty complex Turbo Pascal
program that I used to run on Win 95 and Win 2K.
I used Linux and the Free Pascal Compiler (FPC) and it did
an amazing job of correctly handling all the Borland
extensions (uses, unit, interface, $define, etc).
Jon
. It is a
19" rack mount unit.
Jon
earlier!
Jon
see.
Jon
Paul's vision.
I guess Bill doesn't like old computers. Constant turnover
of newer machines sells a LOT of MS products.
Jon
On 3/18/23 15:48, Steve Malikoff via cctalk wrote:
Jon said
On 3/18/23 04:34, Steve Malikoff via cctalk wrote:
G'day all,
I have just uploaded the engineering drawings for the early PDP-11/05, the
one with the solid (no slots) Mazak lower bezel
Huh? Mazak made machine tools. Did you
On 3/18/23 04:34, Steve Malikoff via cctalk wrote:
G'day all,
I have just uploaded the engineering drawings for the early PDP-11/05, the
one with the solid (no slots) Mazak lower bezel
Huh? Mazak made machine tools. Did you mean Zamak
(zinc-based die casting alloy)?
Jon
Sorry, I've lost track of the guy who was interested in
collecting CAMAC bits. Cleaning up our lab, I found a
Kinetic Systems 3922 Z1A crate controller, and
a 2926 Z1A ISA slot controller for it. Anybody interested?
Thanks,
Jon
s the main computer resource on
campus. When the moved up to a 360/50, they were able to
benefit from multiprogramming, and got a boost in
throughput, although the 7094 was QUITE a bit faster than
the 360/50.
Jon
t the motor has
failed, you can unplug the motor and apply 12 V to it and
see if it moves. Otherwise, the full-bridge driver has gone
bad. Or, mayvbe just a bad connection where the motor plugs
into the board.
Jon
Does this help?
https://flic.kr/p/2omGxh8
-Jon
to reflow over 2000
boards. I got a ramp and soak thermocouple controller (it
allow you to program temp points and time intervals between
the points) and poke a micro-size thermocouple into a PC
board plated through hole. Thus it controls actual board
temperature.
Jon
0-Hz power, and were
astonishingly small.
At least the mid-range 370's had built-in motor generators
that converted 208V 3-phase power to 120/200 V 415 Hz
3-phase power. The internal supplies ran off that, vastly
reducing the size of transformers and capacitors.
Jon
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