Re: 10x life size sculpture of a ZX Spectrum PCB

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:

IBM System/32 and System/3 Manuals available

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

Re: Vintage HP 1000 Floating point processor ( EBAY )

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

Re: Convex documentation online (C220 arrived)

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

Re: VCF?

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

Re: Any 7 track drives available?

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

Re: HP 12653A line printer interface

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

Re: Repurposed Art (ahem...)

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

Re: Informer D304 terminal docs, etc?

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

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

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

Re: IBM 4331 Mainframe

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

Re: Hershey Fonts now 50 years old

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,

Re: Free HP 9836 in Santa Cruz, CA

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

Re: In Hong Kong any old computing places to go?

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

Re: Run/Stop switch from a Soviet S/370 clone

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

Re: HP 9836 systems and Fuji Pictrography 4000 printer available

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

Re: HP 9836 systems and Fuji Pictrography 4000 printer available

ssage- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Curious Marc > via cctalk > Sent: Sunday, 28 May 2017 7:04 AM > To: Bob Rosenbloom <boba...@sbcglobal.net>; cctalk@classiccmp.org > Subject: Re: HP 9836 systems and Fuji Pictrography 4000 printer available > &

Re: Y Combinator is restoring one of Alan Kay's Xerox Alto machines

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

Re: DEC archives

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).

Re: IBM 4331 Mainframe 3 phase converter

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"

Re: HP 2108A key

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

Re: HP 9845 complete system on auction in Sweden

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

Re: HP 2108A key

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

Re: (Classic Computers) HP 7970 1/2" 9-Track Reel-to-Reel Tape Drive

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

Re: HP Draftmaster I, Power Supply repair

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 ,

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

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! :-)

Re: Xerox Alto Chordset Pictures (was RE: VCF?)

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

Re: Convex C220 lives

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

Re: HP 9845 complete system on auction in Sweden

> 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

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

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

Re: DCC-116 E / DATA GENERAL NOVA 2/10 / Nixdorf 620 - Restoring and restarting

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

Re: VCF?

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

Re: eBay: MEMOREX 3693-2 & 3690-2 Disc Drive Mainframe IBM 3370-2 VINTAGE

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

Re: Computing Pioneer Dies

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.

IBM 360 front panel on ebay

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

Re: WTB: HP-85 16k RAM Module and HPIB Floppy Drive

> 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

Re: HP 2640 character set generation manual in the UK

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

Re: IBM 2501 + doc + spares available in EU.

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:

Re: Playing with HP2640B

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

Re: 6130B

That's the guy I got my 6130B from. Marc > On May 16, 2018, at 6:18 PM, Glen Slick via cctalk > wrote: > > That seller has listed the 6130B and two 6131B a few times. Since > those are in Seattle I should see if the seller allows local pickup as > the listed shipping

Re: HP 2100 prototyping card

I got it! Thanks Al, I had been looking for one of these for a while, but the few ones that were available were at ridiculous prices. I wanted it mostly so I can reverse engineer it and make more of them, and/or get some inspiration for an FPGA based I/O board. Marc From: cctalk

Re: Logic Analyzer software for the HP-IB/RS-232 bus pre-processor HP 10342B

Wow. Impressive reverse engineering work. Congrats! Marc > On May 26, 2018, at 5:09 PM, Glen Slick via cctalk > wrote: > >> On Fri, May 22, 2015 at 7:43 PM, Marc Verdiell >> wrote: >> This has probably been asked before, but does anyone have the software >> package that came with the

Re: IBM junk

Woohoo! What a collection! And none of it junk! Well done. Let me guess: staying in the US, East Coast, southern part? In any case, great that you found an acquirer that could preserve your awesome collecting work. And thanks so much for sharing the nice photos. Marc > On Jun 22, 2018, at 3:34

Re: EPROM baking

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

Re: Argh--my old faithful HP16C is failing!

By the way, on the Mac, a very excellent emulation of the Voyager series including the 16C and the 15C with a weird pseudo French name: "nonpareil-16C" Highly recommended, works as beautifully as it looks. I did not find a good emulation on the PC. There is one that had a good demo but costs

Re: Argh--my old faithful HP16C is failing!

uot; <j...@cimmeri.com>, "cctalk@classiccmp.org" <cctalk@classiccmp.org> Date: Saturday, December 23, 2017 at 9:18 PM To: <gene...@ezwind.net>, "cctalk@classiccmp.org" <cctalk@classiccmp.org> Subject: Re: Argh--my old faithful HP16C is failing! O

Re: Gallery online: A collection of Soviet control rooms pictures

Quite impressive. Marc On Jan 13, 2018, at 9:34 PM, Tomasz Rola via cctalk wrote: What the subject says. For control & analog aficionados. http://blog.presentandcorrect.com/27986-2 source: https://lobste.rs/s/ziu1uu/collection_soviet_control_rooms -- Regards, Tomasz

Power plugs and cables for the IBM 3420

Can any of you identify which power plugs models these are. They are on my IBM 3420 tapes and connect to the IBM 3803 controller, 3 phase: https://www.dropbox.com/s/ftfpg0owdvb173u/IMG_5066.JPG?dl=0 https://www.dropbox.com/s/uyzpwcp6sjkvrpf/IMG_5067.JPG?dl=0 These are for the large vacuum

Re: ultrasonic cleaning for disk heads

> On Jan 27, 2018, at 11:02 AM, Mark J. Blair via cctalk > wrote: > > When it happens, am I correct in assuming that the pack is toast, and should > never be loaded again? Carl would be better qualified to answer that one, but from what he has taught me and what we've

Re:

If it does we were blissfully unaware of it... You need very little fortunately. Marc On Jan 30, 2018, at 7:17 AM, Tapley, Mark via cctalk <cctalk@classiccmp.org> wrote: On Jan 27, 2018, at 8:35 PM, Curious Marc via cctalk <cctalk@classiccmp.org> wrote: > Next video: cleaning

Re: Re:

Next video: cleaning heads in fragly brewed IPA (the beer). I bet it would work too. Ultrasound in hot solvent cleans stuff that no other method can. Marc > On Jan 27, 2018, at 5:26 PM, Adrian Stoness via cctalk > wrote: > > yea ipa's are to bitter > > have u had a

Re: How to enable USB drives in both Windows 98SE AND MS-DOS 7.1.

Here you go: Networking between Win98 and Win7 On Windows 7, using regedit, set “HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Lsa\LMCompatibilityLevel” to “1” You might need to create the new entry under \lsa as a REG_DWORD, set to 1 On the Win98 machine:

Re: How to enable USB drives in both Windows 98SE AND MS-DOS 7.1.

> As to ExittoDOS.pif, this doesn't seem to exist on a Windows 98SE install. If I remember well, the ExitToDOS file gets created automatically the first time you exit to DOS manually from Win98. I use it all the time to go back and forth from the DOS environment to the GUI (go back to GUI

Re: ibm panel

Pretty! Marc From: cctalk on behalf of "cctalk@classiccmp.org" Reply-To: , "cctalk@classiccmp.org" Date: Saturday, February 24, 2018 at 5:30 AM To: "cctalk@classiccmp.org"

Re: ID some core memory

Not HP. They used much smaller Ampex made core planes in the 2116. Marc > On Jan 1, 2018, at 4:52 PM, Adrian Stoness via cctalk > wrote: > > could be hp or phillips? > > > On Mon, Jan 1, 2018 at 6:03 PM, Steve Malikoff via cctalk < > cctalk@classiccmp.org> wrote: > >>

Re: DEC quad board rack

That's pretty neat. Nicely done. Marc On Dec 31, 2017, at 6:32 AM, Noel Chiappa via cctalk wrote: 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:

Re: HP scope mailing list

+1 on the hp_agilent Yahoo group Marc > On Aug 14, 2018, at 10:22 PM, Paul Birkel via cctalk > wrote: > > Try: hp_agilent_equipm...@yahoogroups.com > > -Original Message- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Charles > Dickman via cctalk > Sent: Tuesday,

Re: HP scope mailing list

Ah, excellent, groups.io is so much better. Marc > On Aug 17, 2018, at 3:14 PM, Toby Thain via cctalk > wrote: > >> On 2018-08-17 12:40 AM, Curious Marc via cctalk wrote: >> +1 on the hp_agilent Yahoo group > > > Which at this very moment is MOVING to groups.io

Re: BASIC (Was: Reading HP2000 tapes

And so does the HP 85. Marc > On Jul 17, 2018, at 1:50 PM, Brent Hilpert via cctalk > wrote: > > The HP9830 (1972) with it's ROM'ed BASIC works this way. > LIST produces a 'cleaned up' version of the source code. > > > >> On 2018-Jul-17, at 1:21 PM, Guy Sotomayor Jr via cctalk wrote: >> >>

Re: HP-2250 in Salt Lake City

It's an HP-IB controlled data acquisition box for large real time industrial test or automation control installations. Very specialized. Think measuring or outputting 100's of analog signals in real time. Most likely meant to be connected to a HP 1000 series computer running the RTE real time

Re: Some late fifties HP measurement equipment available. ( Switzerland )

Wow. Beautiful nixie counter, and 10MHz with tubes to boot! Impressive. The kind of stuff that made HP famous. Marc > On Sep 3, 2018, at 12:34 PM, Brent Hilpert via cctalk > wrote: > >> On 2018-Sep-03, at 8:39 AM, jos via cctalk wrote: >> the following late fifties HP equipment is available

Re: GT-40 etc.

That one is going to go for an insane amount of money:

Re: Help on a 1998 Award BIOS chip

talk@classiccmp.org> Reply-To: geneb <ge...@deltasoft.com>, "cctalk@classiccmp.org" <cctalk@classiccmp.org> Date: Tuesday, April 17, 2018 at 7:09 AM To: "cctalk@classiccmp.org" <cctalk@classiccmp.org> Subject: Re: Help on a 1998 Award BIOS chip On Mon, 16

Re: Help on a 1998 Award BIOS chip

Glen, I think I wasn't thinking straight late last night when I finally found the chip was bad... I usually don't work on stuff that "new", so I was unfamiliar with the PLCC 32 format and have nothing to program it. I bet the reference of what chip it is hides just under the label! Assuming

Re: Help on a 1998 Award BIOS chip

> On Apr 16, 2018, at 6:31 PM, Chuck Guzis via cctalk > wrote: > >> On 04/16/2018 06:11 PM, CuriousMarc via cctalk wrote: >> And lifting the sticker reveals the BIOS chip is just a W29C020P-12, a >> regular 256k x 8 Flash memory, 5V chip. Duh. Mystery solved. Of course

Re: Shipping a Flexowriter

+1 on Pak Mail too. Marc > On Feb 27, 2018, at 12:12 PM, Chuck Guzis via cctalk > wrote: > >> On 02/27/2018 11:37 AM, Ed Sharpe wrote: >> *In my case lady worked at a warehouse and had her people palate >> and strap the 3 ttys! saved $$ Pack mail is great

Re: Identifying TO-3 w/HP house numbering

Can't find it either in any of the X-ref lists I have. As you know already, 1854 are usually NPN transistors, but around these numbers I see mostly Darlingtons in my collection. So maybe that's what you have, and why the junctions would test weird. Marc > On Oct 15, 2018, at 10:21 PM, Josh

Re: Identifying TO-3 w/HP house numbering

Yay! Congrats Josh! Marc > On Oct 16, 2018, at 8:39 PM, Josh Dersch via cctalk > wrote: > >> On Tue, Oct 16, 2018 at 11:19 AM Josh Dersch wrote: >> >> Thanks, all, for the responses! The way it measures out makes it look >> like it may be an MJ10006 or similar. I think it's probably ok. >>

Re: Desktop Metaphor

As they used to say, Windows95 = Mac 1984. Which is pushing it a bit but has some truth in it... Maybe Mac 1990. Curiously, the Xerox Alto has quite advanced GUI and object oriented programming (including the smalltalk windowing environment), but no desktop metaphor or icons that I have seen. I

Re: Identifying TO-3 w/HP house numbering

Forgot to mention, I have a 2382A that works (affectionately known as the "Munchkin" terminal). I could measure some stuff in mine for comparison if that could help out. For the HP curious, the 2382A makes an appearance at the end of one of my videos: https://youtu.be/GLkhcDAOVPo?t=19m50 It is

Re: The DosFish (object oriented GUIS)

That’s a great one! Best summary of this thread so far. Thanks for sharing. Marc > On Oct 28, 2018, at 10:36 AM, Jeffrey S. Worley via cctalk > wrote: > > This was circulating in 1995/6. IBM had been shipping the very good > OS/2 for some years and Microsoft was trying to catch up. Someone

Re: Original AGC restoration / was Re: Apollo 8 Mission Control printers, or not?

> 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 > >

Re: OT? Upper limits of FSB

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

Re: Xerox Star emulator (Darkstar) released today

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: > >

Re: Documation card readers for sale

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:

Re: Odd Hp leds in dip package

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

Re: Removing PVA from a CRT

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

Re: A weird and ancient IBM offline memory device

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

Re: Odd Hp leds in dip package

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

Re: Working Ardent Titan on Youtube

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

Re: Original AGC restoration / was Re: Apollo 8 Mission Control printers, or not?

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? >

Re: Model 40 Re: IBM 360 Model 50 information?

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

Re: IBM 360 Model 50 information?

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:

Re: AGC restoration / was Re: PDP-8 signed overflow detection - Apollo guidace computer

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

Re: Pleas ID this IBM system....

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

Re: HP 85 tapes

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

Re: BASIC for HP 1000, 21xx series

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 ) >>

Re: HP 85 tapes

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 >

Re: Pleas ID this IBM system....

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"

Re: HP98035 Real Time clock and AC5954N clock chip

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

Re: apollo psa test point adaptor

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

Re: HP-01 calc watch go withs - brochures, t- shirts, booklets, ad copy who else collecting?

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,

Re: Pleas ID this IBM system....

Fantastic. It fell into the right hands. Marc And so the story continues https://ibms360.co.uk/

Re: apollo psa test point adaptor

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

Re: apollo psa test point adaptor

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

Re: Plane of core memory

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 ,

Re: Telex 20 Meg 10 platter very heavy monster drive needed drop line off list..r

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: > > >>

Re: Identification of an HP minicomputer

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

Re: Margaret Hamilton Guardian interview.

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

Re: Best email to reach a human at the centre for computing history (computinghistory.org.uk)

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

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