Dominique,
Nice to see your machine working so well! I like how it lights up from the
inside. To connect it to a computer, you could simply get a Volpe board that
does the Baudot 60 mA loop to ASCII RS 232 conversion for you, or build one
yourself like I did. Info on both here:
https://www.curi
Ah, it was you Liam. Ken is enamored with the new title you bestowed on him. He
will now be officially called: Master Ken, Hardware Boffin.
:-)
Marc
> On Jan 27, 2022, at 11:54 AM, Liam Proven via cctalk
> wrote:
>
> On Thu, 27 Jan 2022 at 17:20, Guy N. via cctalk
> wrote:
>>
>> This migh
Awesome! Congrats to everyone involved!
Marc
> On Mar 28, 2022, at 12:24 PM, js--- via cctalk wrote:
>
>
>> On 2022-02-25 16:09, js--- via cctalk wrote:
>>
>> Hi, folks.
>>
>> I've a HP 9915A computer with an interesting problem. The motherboard
>> utilizes a ceramic Intel D8048 chip.
You don’t strictly need an inhibit wire to write cores. You can write the core
with just the addressing lines. The inhibit wire is just there to simplify the
addressing electronics logic in early core memory, so you don’t need to have
per core control of the current in the address lines when wri
Thanks for the link. I met him when I was at Bell Labs. He was an outstanding
technology speaker and writer, with a great sense of humor. His columns were
hilarious and right in target. A written form of Dilbert for the technologist.
Marc
> On Apr 7, 2022, at 10:41 AM, Jim Brain via cctalk
> w
I have been auto-rejected from the list again, due to too many bounces,
whatever this means. But I swear I have been a good boy and did not bounce too
much! This is a plain vanilla gmail account by the way. Does anyone have any
idea why this keeps happening? Anything I can do about it?
Marc
one
> thread "Cctalk subscription disabled"
>
>
>
>
>
>> On Tue, May 17, 2022 at 10:26 PM Curious Marc via cctalk
>> wrote:
>> I have been auto-rejected from the list again, due to too many bounces,
>> whatever this means. But I swear I have
The cafeteria is open, there is a Starbucks and even a nice Italian across the
street if you want to treat yourself. On Wednesdays we have a demo of the IBM
1401 at 3 pm, and before that the restoration team works on it from 10:30 am on
(it needs constant maintenance and repairs to keep it runni
Jay Herde, a viewer of my YouTube channel, contacted me to say that he has the
following available that he would like to get rid of:
IBM System/3 Disk Concepts and Planning Guide.
IBM System/3 RPG II Disk File Processing Programmer's Guide.
IBM System/3 Models 8 and 10 Disk System Control Program
Let me know what you come up with for the 3 phase converter solution. I have
the exact same problem right now to provide power for my 3 3420 tapes and the
3803 controller. Also have 220V 50A single phase coming in the shop (er,
garage), courtesy of the EV charger.
Marc
On Apr 30, 2017, at 9:38
Bob,
Thanks, that looks just about perfect. Solid state, true sinusoid 3 phase, 30A
continuous but can do 140A for 4 seconds - seems made to power a big bunch of
vacuum column tapes.
Marc
From: cctalk on behalf of
"cctalk@classiccmp.org"
Reply-To: Bob Rosenbloom , "cctalk@classiccmp.org"
My, these are beautiful! I didn't know the Gothic and Japanese and other
elaborately rendered sets existed, thanks for posting. That's perfect to try
on my recently acquired HP 1345 vector screen or on my plotters! You learn
something everyday on this list.
Marc
On May 11, 2017, at 6:53 AM, S
Bob,
I might not take the whole machines, but I could use parts. I am missing a few
key caps/switches and a power switch on mine (the three of them which come...
from you!). And extra IO boards are always welcome. Before you scrap
everything, let me know if I can come on Sunday.
Marc
Fr
You might want to contact this e-bay seller in HK
http://www.ebay.com/usr/newtongarage
He has interesting stuff. He is unreasonably pricey though.
Marc
From: cctalk on behalf of
"cctalk@classiccmp.org"
Reply-To: Christian Liendo , "cctalk@classiccmp.org"
Date: Friday, May 26, 2017 at 8:
Pretty!
Marc
From: cctalk on behalf of
"cctalk@classiccmp.org"
Reply-To: Johannes Thelen , "cctalk@classiccmp.org"
Date: Thursday, May 25, 2017 at 3:17 PM
To: Liam Proven , "cctalk@classiccmp.org"
Subject: Re: Run/Stop switch from a Soviet S/370 clone
I have whole ES EVM panel, i
Nice way to present it! I added my own info.
Marc
From: cctalk on behalf of
"cctalk@classiccmp.org"
Reply-To: Oldcomputers , "cctalk@classiccmp.org"
Date: Wednesday, May 24, 2017 at 11:21 AM
To: "cctalk@classiccmp.org"
Subject: DIR of old computer collectors #3
Here's the page for no
:cctalk-boun...@classiccmp.org] On Behalf Of Curious Marc
> via cctalk
> Sent: Sunday, 28 May 2017 7:04 AM
> To: Bob Rosenbloom ; cctalk@classiccmp.org
> Subject: Re: HP 9836 systems and Fuji Pictrography 4000 printer available
>
> Bob,
>
> I might not take the whole ma
On Jun 15, 2017, at 11:33 AM, Mark Linimon via cctalk
wrote:
Is there no way that occasional volunteer effort could be used in this
or other tasks at the CHM?
mcl
Absolutely. The museum archival and cataloging efforts enlist the support of
many volunteers (and donors). It would not qualify it a
Two more Alto restoration videos
https://youtu.be/Grl0KCFiJLs
https://youtu.be/adEr2aRwHnI
You can even catch a glimpse of Al in the second one :-)
Marc
On 2/21/17 8:46 AM, Liam Proven wrote:
On 20 February 2017 at 08:09, Curious Marc wrote:
Alto Restoration Videos Parts 13 and 14
Good eye! That's Bob indeed.
Marc
From: cctalk on behalf of
"cctalk@classiccmp.org"
Reply-To: dwight , "cctalk@classiccmp.org"
Date: Friday, June 23, 2017 at 2:45 PM
To: Connor Krukosky , "cctalk@classiccmp.org"
Subject: Re: Free HP 9836 in Santa Cruz, CA
Sounds like Bob Rosenbloom.
We could try to read them off the IBM 1401 7-track. But you'd have to send the
tapes over here, can't send the computer ;-). Contact me offline of interested.
Marc
On Jul 7, 2017, at 5:20 PM, Chuck Guzis via cctalk
wrote:
> On 07/07/2017 04:39 PM, Al Kossow via cctalk wrote:
> Can you come up
Cool. Thanks for looking. Do you guys also have some of the full 132 column
ones? In particular the HP2618A or related, 1200 lpm impact chain/train
technology: http://www.hpmuseum.net/display_item.php?hw=331 . I just acquired a
1200 lpm Memorex that looks like it is a rebadged Dataproducts with
I like it, that's quite artfully done actually! Best paint job ever on an 024
(am I right? 024, not 026 because it has no printer?). It would be perfect if
you had a normal 024 or 026 to put right beside it with its drab gray wrinkle
paint. What a pity it lost its keyboard. That ruined both the
BTW I know the seller well, he is local to me and I have had no issues dealing
with him. These come from a large stash that came from a former HP 1000
maintenance shop (Advent I think was their name, or something like that).
That's one of the few units I didn't take ;-)
Marc
On Aug 3, 2017, at
Wow, that's mighty impressive. I knew about your FPGA 360/65 project but had
never seen your website before. I must visit next time I'm close to the
Netherlands!
Marc
On Jul 29, 2017, at 11:17 PM, Camiel Vanderhoeven via cctech
wrote:
My Convex C220 arrived about a week ago, so I now have a C
I thought it looked awesome. Great pick!
Marc
On Aug 8, 2017, at 7:13 PM, Josh Dersch via cctalk
wrote:
On 8/8/2017 3:50 PM, Glen Slick via cctalk wrote:
> On Aug 8, 2017 3:42 PM, "Josh Dersch via cctalk"
> wrote:
>
> Hi all --
>
> I picked up an Informer D304 terminal at VCF West because i
I just put up one video
https://youtu.be/qnjtna0tRhg
Warning: it's selective, mostly centered on my own favorites and interests, the
people I could interview, and of course our Alto which was on exhibit.
Almost no micro or post 1970's stuff, of which there was a lot more of course.
Marc
F
Great work, you have isolated the supply fault. Looks like it's not regulating,
but the fact that it starts at 5V tells me it actually is, at low current
drain. Are you *really really* sure the filtering caps are good *at rated
voltage* (we had a recent case of caps that tested perfect with my l
A straightforward linear supply. We should be able to get that puppy working.
Looks like you have two of the same thing on G2, two +5V supplies. You could
take advantage of that and compare voltages of one against the other at several
points. You coukd also monitor the voltage on the non regulat
Dominique,
I wouldn't worry about the readings on your 0.1 Ohm resistor, you are not going
to get any trustable results on something that low without a four wire
ohm-meter.
It seems that you have eliminated the power transistors as being the source of
the failure.
I'd like to eliminate the r
Awesome! Congratulations!
Marc
> From: Dominique Carlier
> Date: Tuesday, August 29, 2017
> Subject: Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and
> restarting
> YES! The monster booting again! :-)
Thanks, I didn't know I could use the 7575 service manual for guidance on the
Draftmaster. Congrats on your repair!
Marc
From: cctalk on behalf of
"cctalk@classiccmp.org"
Reply-To: Philipp Pap , "cctalk@classiccmp.org"
Date: Wednesday, August 30, 2017 at 12:21 AM
To: "cctalk@classiccmp.o
Problem is, it's not like this simple drawing at all, it's much more
complicated. Every surface is slanted, edges are rounded, edges are beveled...
Quite a refined industrial design actually.
Marc
On Aug 13, 2017, at 11:26 PM, ste...@malikoff.com wrote:
Marc said:
> The overall Chordset dimensi
Steve,
Now that you see the shape in detail, feel free to ask for the specific
dimensions you'll need as you go along. I'll take the caliper out and make
precise measurements.
Marc
On Sep 6, 2017, at 1:00 AM, Steve Malikoff via cctalk
wrote:
>> Steve,
>>
>> Here you go, 13 pictures of the Ch
Awesome work! Congratulations!
Marc
On Sep 11, 2017, at 8:47 AM, Camiel Vanderhoeven via cctech
wrote:
For a change, rather than a request for help, here¹s a success story: I
managed to bring a Convex C220 (dual vector CPU mini supercomputer from
1988) back to life. Both CPUs are working, but I
Wow, looking almost new! I didn't know you could interface a 9845 with a 7970
tape drive.
Marc
On Sep 22, 2017, at 12:23 AM, Pontus Pihlgren via cctalk
wrote:
Hi All
There is a very nice looking HP 9845 with peripherals and documentation
for sale in Sweden, on ebay owned auction-site Tradera
Mike,
That makes two of us. I am interested too, I have the same key setup on my 21MX
and have been looking for the key for a long time! So if someone can make it, I
am interested!
Marc
On Sep 20, 2017, at 9:51 PM, Mike Loewen via cctalk
wrote:
The key is for this switch on the front panel
Thanks for the link Fred. $10 for the key - worth a try. I'll get it and report
if it works.
Marc
On Sep 22, 2017, at 12:50 PM, Fred Cisin via cctalk
wrote:
H2007 - double sided Chicago key, brass, in a 21MX in the pictures
http://www.ebay.com/itm/322652408202 (seller shows same picture for s
> On I Sep 23, 2017, at 4:23 PM, Chuck Guzis via cctalk
> wrote:
> The 7970E comes in an HP-IB version
Indeed, and I even have one of these beautiful tapes! I managed to interface it
to my HP 85 but that was very hard. It required bus sniffing work, an FPGA
adapter, and making an HP 85 "driver
Jack,
You can drive an HP-IB equipped HP7970E with an old PC that has an HP-IB card
using Ansgar Kueckes HPDIR. I debugged it together with Ansgar. The rub is that
it only worked well with an ISA HP-IB card running under Win98. The PCI HP-IB
card running under XP uses a driver that causes
Josh,
Sorry don't have it, but I didn't even know there was a 9836 that ran Unix, so
I learned something again. Does it look like a regular 9836C or is it a
different form factor?
Marc
On Oct 14, 2017, at 3:25 PM, Josh Dersch via cctalk
wrote:
Hi all --
Anyone have media for the 9836U versio
Fascinating talk
Marc
On Nov 10, 2017, at 8:16 PM, Jason T via cctalk wrote:
>> I'm harly a member of the "ENIAC/Mauchlyite crowd" (in fact, I used to not
>> have a good impression of them at all), but I thought Haigh et al made a
>> pretty good case.
>
> Here's Prof. Haigh speaking on ENIAC at
Dave,
The UK Museum responded to my email inquiry, and went through the effort of
scanning their document and sending it to me. I'll forward it to David and Al
for completeness.
Marc
From: Dave Wade
Date: Friday, November 3, 2017 at 10:37 AM
Well they say they would like to scan but no
Dang. Wrong side of the pond.
Marc
From: cctalk on behalf of
"cctalk@classiccmp.org"
Reply-To: Henk Stegeman , "cctalk@classiccmp.org"
Date: Sunday, November 12, 2017 at 1:48 AM
To: "cctalk@classiccmp.org"
Subject: IBM 2501 + doc + spares available in EU.
Hi,
Available in the
> I think that the upgraded B model ROMs in the PRM-85 are supposed to let it
> use the newer drives.
Yes it does. I have an HP 85A, the PRM 85 and a 9122, and that combo works
beautifully. I am not sure I ever tried it with high density diskettes though.
I could check that if you want.
Marc
O
The ebay seller of this IBM 360/40 front panel asked me if I could put a link
on the list. So here it is:
https://www.ebay.com/itm/IBM-360-model-40-mainframe-CPU-Operator-panel/152780991916
Disclaimer: I am not affiliated with the seller other than he has contacted me
after seeing one of my own v
We just dumped the enhanced character ROMs from a HP2645. 8k bipolar mask ROMs,
90 ns (they need to be fast since they are used as video RAM really). I read
them on the Data IO using their PROM equivalent, AMD 27S181. The microvectors
sets (line set and large character sets) are 9 bits. The 9th
Excellent! Congrats Guy. Looks like modempot really needs to move out of his
building in a hurry. I think between me, you, Carl, Bob, the museum and a few
ebay buyers we got all of the big stuff saved.
Marc
On Dec 17, 2017, at 4:44 PM, Guy Sotomayor Jr via cctalk
wrote:
To let folks now, I’v
I see the same things. Some chips just won't reprogram. Symptoms include
failure to program just like you, but also "chip backwards" errors. Can't
remember the chip brands, I just toss them out when that happens. I have not
found any way to resuscitate them. Maybe ~10% of the chips I tried had t
Very nice writeup!
Marc
> On Jun 26, 2023, at 5:06 AM, Steve Lewis via cctalk
> wrote:
>
> VCF SW was this past weekend near Dallas, Texas.
>
> Here are some highlights from my perspective.
>
> https://voidstar.blog/vcf-southwest-2023/
>
>
> Most photos you can click to enlarge (Edge has b
Very impressive. Congratulations!
Marc
> On Jul 11, 2023, at 3:23 AM, Jay Jaeger via cctalk
> wrote:
>
> Over the past couple of months I have been working on my FPGA implementation
> of the IBM 1410 1960's era pre System/360 system again. I am pleased to share
> that the CPU now passes a si
I have both, and I end up using the 1670G most of the time because it is so
much more convenient. The acquisition cards on the 16xxx keep failing too.
Marc
> On Aug 20, 2023, at 12:43 PM, Glen Slick via cctalk
> wrote:
>
> On Sun, Aug 20, 2023, 12:05 PM John H. Reinhardt via cctalk <
> cctalk
Sweet. This encyclopedic! Thanks a lot!
Marc
> On Oct 2, 2023, at 11:29 AM, Jonathan Chapman via cctalk
> wrote:
>
>
>
>
> Very cool, thanks for sharing! I didn't know such a tabulation existed!
>
> Thanks,
> Jonathan
>
> --- Original Message ---
>> On Monday, October 2nd, 2023 at
Awesome!
Marc
> On Dec 3, 2023, at 4:00 AM, Mattis Lind via cctalk
> wrote:
>
> Hello!
>
> I have an ongoing project to restore a Datapoint 2200 version II and in the
> process of doing so I created a small simulator for it to understand it
> better. The simulator is now in the condition that
Power supply problem?
Marc
> On Apr 30, 2024, at 8:58 AM, Dominique Carlier via cctalk
> wrote:
>
> Hello everyone
>
> I need your help to identify an issue on my Diablo Model 40 Series. I don't
> know where to look, it's so vast !
>
> Here's the problem:
> When RUN is activated, the drive
Yes the oscilloscope are your eyes and ears for electrons…
Marc
> On May 1, 2024, at 11:44 PM, Dominique Carlier wrote:
>
> Hi Marc !
>
> It should be so great if it was just the PSU, everything else is hyper
> overkill in terms of complexity but on the multimeter all the voltages show
> th
First one. Sounds vintage, is not musically annoying like most of the others,
and has a nice easter egg in it.
Marc
> On May 9, 2024, at 12:31 PM, John Herron via cctalk
> wrote:
>
> Do you know who your demographic or age is that you're trying to attract to
> watch the videos?
>
>> On Fri,
We also have a LGP-30 on display at the Computer History Museum.
Marc
> On Aug 15, 2024, at 4:49 PM, Rick Bensene via cctalk
> wrote:
>
> Mark L. wrote concerning the LGP-30 computer in the LCM+L/Paul Allen
> Auctions:
>
>
>> I dare to bet it's the last one. Anywhere.
>
>
>
> It isn't t
Try to look up HDSP-2450. These are 5x7 alphanumeric displays with shift
register drivers included. Yours might be an earlier version of that, or just a
commercial temp version of that (the HDSPs are extended temp -55/85C). Maybe
the internal part used in the HP9825 or HP 9830 displays, then la
But the HDSP 2010 have only 12 pins. I think his are 28 pins, hence the HDSP
2450 suggestion, the closest I could find working off my 1986 catalog.
Marc
From: cctalk on behalf of
"cctalk@classiccmp.org"
Reply-To: Al Kossow , "cctalk@classiccmp.org"
Date: Wednesday, November 21, 2018 at 1
I like this idea, thanks for sharing. I might do the same for my HP 264x
screens.
Marc
From: cctech on behalf of
"cct...@classiccmp.org"
Reply-To: Michael Thompson ,
"cct...@classiccmp.org"
Date: Tuesday, November 20, 2018 at 5:59 PM
To: "cct...@classiccmp.org"
Subject: Re: Removing PVA
The Noodle Snatcher! We have one of these in the CHM collection.
Marc
From: cctech on behalf of
"cct...@classiccmp.org"
Reply-To: Peter Van Peborgh , "cct...@classiccmp.org"
Date: Tuesday, November 20, 2018 at 2:14 PM
To: "cct...@classiccmp.org"
Subject: A weird and ancient IBM offline
Fantastic video and work! The immense boards and 3D molecular software are very
impressive!
Marc
> On Nov 25, 2018, at 6:42 AM, Camiel Vanderhoeven via cctech
> wrote:
>
> Now that my mousepad problem has been solved, and I have a fully working
> Ardent Titan with some interesting software on
Interested in the Arduino interface too. Will save me some time. Has it been
posted anywhere?
Marc
From: cctalk on behalf of
"cctalk@classiccmp.org"
Reply-To: Ethan Dicks , "cctalk@classiccmp.org"
Date: Monday, December 10, 2018 at 7:21 AM
To: "cctalk@classiccmp.org"
Subject: Re: Documa
> On Dec 29, 2018, at 6:00 AM, Brent Hilpert via cctalk
> wrote:
>
>> On 2018-Dec-28, at 4:43 PM, Adrian Stoness via cctalk wrote:
>> have u seen the agc being fired up videos
>
>
> Yes, videos from list member curiousMarc :
>Episode 1: https://www.youtube.com/watch?v=2KSahAoOLdU
>
>
We don’t know yet. Looks like a very difficult repair.
Marc
> On Dec 29, 2018, at 7:25 PM, Adrian Stoness wrote:
>
> think that core pack will ever live again?
>
Interconnects at 28Gb/s/lane have been out for a while now, supported by quite
a few chips. 56Gb/s PAM4 is around the corner, and we run 100Gb/s in the lab
right now. Just sayin’ ;-). That said, we throw in about every equalization
trick we know of, PCB materials are getting quite exotic and con
Just wow. Congrats Josh.
Marc
> On Jan 19, 2019, at 9:09 PM, Scott Kevill via cctalk
> wrote:
>
> Josh didn't mention this, and I didn't see it linked on the GitHub repo, but
> he's also written a fantastic intro article about it here:
>
> https://engblg.livingcomputers.org/index.php/2019/01/
The way I have been doing it is to copy the tape files to a LIF floppy disk
file (real or just emulated with HPDRIVE), then archive that - either just the
HPDRIVE file or a ImageDisk archive of the real disk.
Recreating the tape is the inverse process of copying the virtual or real disk
to the
Christian,
This I don’t know. You should join the hp 80 group on groups.io and ask there:
https://groups.io/g/hpseries80
Some of the original engineers for the 85 are on there, they know every detail,
and are incredibly helpful.
Marc
> On Feb 26, 2019, at 12:40 AM, Christian Corti via cctalk
>
Excellent write up Brent. We’ll refer to it when/if we get our 2116 going!
Marc
> On Feb 24, 2019, at 10:18 AM, Brent Hilpert via cctalk
> wrote:
>
>> On 2019-Feb-24, at 2:03 AM, GerardCJAT via cctalk wrote:
>>
>> Back in ''70, sometimes we were running "basic" BASIC ( NOT Time sharing )
>> o
Which brings us to the real problem: we don’t have 360 Model 50 ALDs. Anyone
has them?
Marc
From: cctalk on behalf of
"cctalk@classiccmp.org"
Reply-To: Jon Elson , "cctalk@classiccmp.org"
Date: Friday, March 29, 2019 at 8:45 AM
To: Ken Shirriff , ,
"cctalk@classiccmp.org"
Subject: Re:
Yes, that would be Carl’s “day to day” blog (http://rescue1130.blogspot.com/).
He is also on the list, lurking in the background. Carl, are you there?
Ken Shirriff has also several deeply researched blog articles on specific AGC
topics (righto.com).
Mike has some very interesting posts on his AGC
As Paul said. ALDs are schematics down to the gate level basically. Necessary
to make a gate exact emulation, or debug and maintain a real machine. Used to
be sent with each and every machine, but sadly not often preserved apparently.
Fortunately our IBM 1401’s came with their ALDs. We refer to
Any appetite at the CHM?
Marc
> On Apr 6, 2019, at 1:09 PM, Al Kossow via cctalk
> wrote:
>
> Hopefully LCM can go after this to flesh out their peripherals
> It looks like a nice set of disks and tapes, hopefully the 360-era
> disk and tape channel controllers are there too
>
>> On 4/6/19 7:0
Great! As Will says, this acquisition price is a small part of what it costs to
move, install and repair the system, so they got a very reasonable deal. Can
you at least tell us if it is coming stateside, or is it staying in Europe?
Marc
From: cctalk on behalf of
"cctalk@classiccmp.org"
R
I believe 3 wire memory was first introduced by IBM in their 360 systems, and
it was a very large development effort. They would almost certainly have
patented their way to do it, but I have not checked.
Marc
From: cctalk on behalf of
"cctalk@classiccmp.org"
Reply-To: Jon Elson , "cctalk@
Nice beastie.
Marc
> On Apr 22, 2019, at 11:34 AM, ED SHARPE via cctalk
> wrote:
>
> Thanks Al yes, that is the one.
>
> and as I recall ISS was a offshoot on univac?In a message dated
> 4/22/2019 11:21:50 AM US Mountain Standard Time, cctalk@classiccmp.org writes:
>
>
>>
These are sturdy and notoriously expensive aerospace grade 38999 connectors. We
had to slightly machine modern 38999’s male plugs to fit in these, but by in
large it still fits the modern standard. I have one of the PSA trays it
connects to, trying to make it work again! Nice and noble hardware
Fantastic. It fell into the right hands.
Marc
And so the story continues
https://ibms360.co.uk/
Nomarski microscopy, Ed. Differential phase contrast microscopy. Makes very
small height differences (partial wavelength) on mostly planar objects pop out,
and creates amazing color effects as a biproduct. Pretty much a stalwart of any
good cleanroom microscope. Every manufacturer offers it, usu
I do not think this is correct. The IRIG almost certainly refers to the Apollo
Inertial Reference Integrating Gyro, which you can see in this video along with
one of the PSA trays Adrian’s contraption is supposed to be testing:
https://youtu.be/lXe2OS4nwnQ
BTW I got my Apollo IRIG at the same a
It’s hard to find documentation for the ground test equipment apparently. The
flyable hardware is very well documented, and Mike Stewart and co. are in the
process of scanning it all at NARA. I can glean a few things from the markings
on your picture. The PSA, or Power and Servo Assembly, had al
Thanks, I’ll see if I can find replacements. You can easily see how they get
zapped: they are 2.5V chips, the NiCd battery *is* the voltage regulator.
Charging circuit is a simple diode connected to 5V via a resistor. Battery
dies, goes high impedance, somebody plugs it in to try it out and poof
Good eye. It’s an HP 2116B. In the queue for restoration. We were starting to
work on it, then the AGC opportunity came along...
Marc
> On Jul 13, 2019, at 4:10 PM, Guy Dunphy via cctalk
> wrote:
>
> At 01:48 PM 13/07/2019 -0700, you wrote:
>> Another of the un-acknowledged people in the upcom
I found Brent Hilpert’s site most useful in getting a quick meaning for these
numbers:
http://madrona.ca/e/HP21xx/index.html
http://madrona.ca/e/HP21xx/iointerfaces.html
There is also a very useful series 1000 reference manual that lists most of the
configs and options and cards, I will get to it
Wow. Very nicely done.
Marc
From: cctalk on behalf of
"cctalk@classiccmp.org"
Reply-To: Peter Corlett , "cctalk@classiccmp.org"
Date: Saturday, March 11, 2017 at 12:57 AM
To: "cctalk@classiccmp.org"
Subject: Re: 10x life size sculpture of a ZX Spectrum PCB
On Fri, Mar 10, 2017 at 05:
I also responded off line. They did scan a doc for me in the recent past.
Marc
> On Nov 2, 2019, at 9:04 AM, Dave Wade via cctalk
> wrote:
>
> I will answer Al offline
>
> Dave
>
>> -Original Message-
>> From: cctalk On Behalf Of Al Kossow via
>> cctalk
>> Sent: 01 November 2019 22:3
Tried the discord, and enjoyed it much more than I would have expected! It was
nice to talk with members in real time and share pictures of new acquisitions,
current projects, and also talk about where everybody lives.
Marc
> On Nov 15, 2019, at 9:31 AM, jwest--- via cctalk
> wrote:
>
> I be
Did not find it either, but if your tape has SCSI I used Overland Data’s Depot4
instead. Google it up, I uploaded it on archives.org.
Marc
> On Dec 13, 2019, at 10:12 AM, Ali via cctalk wrote:
>
> Hello,
>
> Can anyone please point me towards a copy of the Tapestar utility package
> for DOS? I
The HP 59304A numeric display unit uses similar technology displays and has the
complete schematics available (at least I have them somewhere). Also you can
buy from Artek media:
https://www.ebay.com/c/1718687526
Maybe you can inspire yourself from that.
Marc
> On Jan 1, 2020, at 11:42 PM, Ander
Anders,
I got the schematics of the driver circuitry from the HP 59304A documentation.
You should be able to replicate it. Will send you in separate email.
Marc
From: cctalk on behalf of
"cctalk@classiccmp.org"
Reply-To: Anders Nelson , "cctalk@classiccmp.org"
Date: Wednesday, January 1
Congrats!
Marc
> On Feb 26, 2020, at 1:57 PM, Bob Rosenbloom via cctalk
> wrote:
>
> On 2/26/2020 1:47 PM, Al Kossow via cctalk wrote:
>>
>>> On 2/26/20 11:56 AM, jos via cctalk wrote:
>>> On 26.02.20 20:43, Al Kossow via cctalk wrote:
https://www.ebay.com/itm/TEKTRONIX-Model-4054A-ALL-I
Yeah, a 360/50. When all the tapes are organized and color matched to the
computer, you know it’s just a photo-op of a fake data center, or at best a
real one with many hours of preparation for a beauty shot. Nice picture though!
Marc
> On Mar 3, 2020, at 8:13 PM, Zane Healy via cctalk
> wrote
Adrian
Congrats on your panel! It is very impressive!
On the Russian resistors I saw, the value was what is written on it. If you
can’t measure them, maybe there is some conformal coating or corrosion on the
leads? You’d need to scratch that off.
For the lamps, it might be time to invest in a var
I see the tape sticking to posts syndrome in my limited experience with HP QIC
tapes also (DC100 / DC2000). The best I have come up with is wipe the posts
with isopropanol. But I had not thought of lubricating them for a 1 time read,
interesting idea. Or replacing the posts with ones machined fr
Agreed. They sure are pressed in, then riveted in for good measure. You’d have
to drill them out first. Not an easy modification.
Marc
> On Apr 30, 2020, at 2:18 PM, Al Kossow via cctalk
> wrote:
>
> On 4/29/20 10:01 PM, Curious Marc via cctalk wrote:
>> Or replacing t
Would love to see it, I have such a machine in the queue for restoration.
Marc
> On Apr 30, 2020, at 5:49 AM, Tony Duell via cctalk
> wrote:
>
> From time to time there are posts here about the Facit N4000 paper
> tape punch/reader unit. The one that looks like a Facit 4070 with a
> tape reade
Thanks!
Marc
> On May 2, 2020, at 4:49 AM, David Collins via cctech
> wrote:
>
> I've pulled together details of the controller used with an HP2748 paper
> tape reader to dump a bunch of tapes from the HP Computer Museum's collection
> with the help of J. David Bryan.
>
> The details are at
Nice work.
Marc
From: cctalk on behalf of
"cctalk@classiccmp.org"
Reply-To: Liam Proven , "cctalk@classiccmp.org"
Date: Friday, May 29, 2020 at 9:02 AM
To: "cctalk@classiccmp.org"
Subject: Building an IBM 3270 terminal controller
https://ajk.me/building-an-ibm-3270-terminal-controlle
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