December 2022 - cctalk - classiccmp.org

by Jim Brain

This might be a bit off topic, so forgive me if so. The issue is a 24VAC motor with one connection to 24VAC and the other gated via two switches. The first switch is a momentary one and the second is in parallel and connected to the motor. A long enough momentary depression on the first switch actuates the electric motor enough to close the second switch, which then stays closed for 1 revolution. The problem is that a quick enough press and release of the first switch does not allow the motor to move far enough to close the second switch. Given the configuration, my general plan was a small one shot timer circuit that energized when the switch was initially depressed and then closed a relay in parallel with the first 2 switches, with a time period that was 1/10 to 1/2 the time of the motor revolution. a quick close and release of the first switch would start the timer, which would then close the parallel switch and then open it a short time later, and then the motor switch, which would still be closed, could signal the end of the cycle. But, I thought I'd ask around and see if a simpler option was available. Jim -- Jim Brain brain(a)jbrain.com www.jbrain.com

2 years, 5 months

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digest problem, starting with #115

by Stan Sieler

Hi, Has anyone else noticed that the list server is screwing up digest emails, starting with Volume #115? Prior to #115, each message would start with: ---------------------------------------------------------------------- Message: 1 Date: Sun, 20 Nov 2022 18:49:31 +0000 (WET) From: ... Subject: [cctalk] Re: Ident... To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk(a)classiccmp.org> Message-ID: <01SKKMC7X5CG8WYOLI(a)beyondthepale.ie> Content-Type: TEXT/PLAIN As of 115, that demarcation has disappeared. Here's an example from #119, message #6: ---------- Forwarded message ---------- From: Devin D <lyokoboy0(a)gmail.com> To: cctalk(a)classiccmp.org Cc: Bcc: Date: Sun, 27 Nov 2022 12:48:23 -0500 Subject: [cctalk] Guidance on repairing Dec PDP 11 System Greetings, Note that that's *NOT* a "forwarded" message (in the normal CCTALK digest sense), but the start of a new message. Since most people are *EXTREMELY BAD* at trimming the messages they are replying to, the lack of proper message demarcation makes reading the digest quite difficult. Sadly, the listserver doesn't post the version number of the its code with each digest (well, as far as I could see), so I can't definitively tie this to a version change. Can this be reverted/fixed, please? thanks, Stan

2 years, 5 months

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Stuff available in Somerset, England - Update and MORE STUFF

by Philip Belben

Dear all, I am still trying to declutter enough to empty the storage container, and have room to move around in my basement. I have decided not to renew the lease on the storage container on 10 January, so stuff needs to go by then. The following stuff will go in the skip if no one comes and collects it by early January: D-Scan video printer DECwriter 2 printing terminal A device for cleaning DEC RK05 platters, poor condition, mechanicals corroded, no cleaning pads or fluid - probably display only. The following stuff will probably also go in the skip: Teletype 43 (the dot-matrix Teletype - this is rare but boring; probably rare because boring) A wide range of other small dot-matrix printers - let me know if you are interested in anything of that nature, and I'll try and make a list. The following are available free to anyone prepared to collect: IBM System/23 Datamaster - complete with (yet another!) dot matrix printer. I have some software for this as well. ACT Sirius 1. A fairly complete system including some software (Wordstar and some accounting packages). I may need help disentangling Sirius stuff from Apricot stuff, since the same ACT logo often appears on both. The following are available, but I'd like to be offered a non-negative amount of money: Apple II systems. Four system units (I think they are two //e, one ][ plus and one ][ Europlus, but I can check. Some disk drives. I should be able to find a monitor or two. Quite a lot of manyals, plug-in cards, probably some software disks - but I may need help sorting out Apple II disks from others. Some of the plug-in cards are prototyping cards, and I think one has been set up to talk to some analogue gaming paddles. Research Machines 380Z. (One of the people who collected other stuff from me has expressed an interest in this, and his prior interest will be taken into account in considering offers.) I have a system box (I haven't yet looked inside) with diskette drives on the front; I also have a GIPB (IEEE-488) card and a rather nice I/O prototyping card - it is pre-populated with three PIO chips and one other large chip, all in wire-wrappable sockets, and lots of space for a homebrew interface. A Victor V86P laptop. I know nothing about this machine, but it has the Sirius logo on it (I think the Sirius 1 was sold under the Victor brand in some places, so this figures) As before, please reply to declutter(a)axeside.co.uk, whether or not you reply here. If I get interest in some of the machines, I'm happy to look more closely at them and try to answer queries. In general, I'd prefer people to come and collect stuff, but for the smaller items (e.g. the Victor laptop) I'd be happy to discuss shipping. Collecting stuff yourself is a more reliable way of getting the parts you need (e.g. cables), and of finding other stuff that I don't mind getting rid of. As regards the systems for which I want money, I do not guarantee to accept the highest offer; as I said, I have already had interest in the 380Z and this will be taken into account. Finally, I am trying to contact Anthony Sibley. We started making arrangements for him to collect some stuff, and then I stopped getting replies to my e-mails. Either he is not receiving them or I am not receiving his replies. Please get in touch, or your TU16 will go elsewhere, maybe even in the skip. Philip.

2 years, 5 months

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Need power supplies?

by Van Snyder

I have two Power General FLU4-150 power supplies, apparently set up to be used in some kind of a server. They have an extra board that includes some Schottky diodes, presumably so they can be used in parallel without a failing one damaging a working one. I don't know the precise model numbers, but they provide +/- 5v and +/- 12v. One (or maybe both) would fit in a Postal Service medium flat-rate box. Yours for the price of a PDF shipping label. I also have five power supplies that appear to have come from Dell servers. I don't know their specs. They have a weird connector that actually has a Molex number (that I have forgotten). Let me know if you might want any of the Dell power supplies and I'll work out which box would be needed for shipping. If you can't use them for their originally-intended purposes, maybe you can convert them to lab-bench supplies. Van Snyder

2 years, 5 months

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REPLICA Cromemco Cyclops Camera

by William Sudbrink

Sorry to spam the list, but I find myself in need of some holiday cash (or positive PayPal balance, anyway) so I am offering a REPLICA Cromemco Cyclops Camera for sale. This is ONLY THE CAMERA. You will need to have your own Cyclops interface board set or build an XYZ scope interface as in the manual: https://www.autometer.de/unix4fun/z80pack/ftp/cromemco/Cromemco%2088%20ACC%2 0Manual.pdf This will be the camera I demonstrated at 2018 VCF East. All three circuit boards are clearly labeled REPLICA in the copper layer. Details of the construction and other photographs are on my web page: http://wsudbrink.dyndns.org:8080/cyclops/index.html#Cromemco I would much rather sell it here to someone who clearly understands what they are getting, rather than dealing with ebay. I will also include a pair of REPLICA side panels (made from measurements of an original) that I had made last year. I would be happy to zoom with the buyer and demonstrate the camera in operation. Email me directly if interested. Thanks, Bill S. -- This email has been checked for viruses by Avast antivirus software. www.avast.com

2 years, 5 months

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A UK Vintage Computer exchange buddy?

by Ethan O'Toole

Hello, I have looked at vintage UK computers on Facebook Marketplace and the like. The people usually will not post, especially to me in the USA. They are normally looking for local collection. Anyone in the UK want to be a vintage computer swap friend? Looking to get some systems from there and could help get systems from here in return. I am in the USA. Private message if interested! - Ethan -- : Ethan O'Toole

2 years, 5 months

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CORRECTION: Peripherals available in Dorset, England : Free to a Good Home

by Martin Bishop

ftagh(a)janefield.net (NOT .org) Martin -----Original Message----- From: Martin Bishop via cctalk [mailto:cctalk@classiccmp.org] Sent: 03 December 2022 18:07 To: General Discussion: On-Topic and Off-Topic Posts (cctalk(a)classiccmp.org) <cctalk(a)classiccmp.org> Cc: Martin Bishop <mjd.bishop(a)emeritus-solutions.com> Subject: [cctalk] Peripherals available in Dorset, England : Free to a Good Home Folks The following job lots are available as described but untested, stored in the attic / house since last use : UMMV Lot A : Matsui B&W 13" 1420T SIL UHF & Scart 230V (may be useful as a retro monitor esp as exhibit) [operable when last in service ~?] Lot B : Samsung CLP-350 A4 Color Laser Enet 230V - contains consumables, level unknown - very streaky when last used + CLP-R350A Imaging Unit + CLP-W350A Waste Bin + CLP-C350A Cyan toner + CLP-Y350A Yellow toner + CLP-M350A Magenta toner [consumables BNIB] [operable but streaky when last in service ~2015] Lot C : Samsung CLP680 A4 Color Laser Enet 230V - contains consumables, level unknown - motion fault when last used "A1-4112" + CLT-K506L Black toner [consumable BNIB] [defective "A1-4112" when last in service ~2022] While these are on the margins of classic, I'm happy to give the community first refusal on a free to a good home basis. Collection needs to be no later than next Thursday 8 December. If firm collection arrangements have not been made by CoP Sunday they will be offered on Gumtree ... If they are still here after Thursday, they may go wheee. Apologies for the short notice. Replies to ftagh(a)janefield.net will be regarded as offers. Collection offers will be considered in the round, but the early bird is likely to have an advantage, accepted offers will be honoured until the agreed collection time passes, thereafter the acceptance will lapse and they will be back in play. Martin

2 years, 5 months

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Peripherals available in Dorset, England : Free to a Good Home

by Martin Bishop

Folks The following job lots are available as described but untested, stored in the attic / house since last use : UMMV Lot A : Matsui B&W 13" 1420T SIL UHF & Scart 230V (may be useful as a retro monitor esp as exhibit) [operable when last in service ~?] Lot B : Samsung CLP-350 A4 Color Laser Enet 230V - contains consumables, level unknown - very streaky when last used + CLP-R350A Imaging Unit + CLP-W350A Waste Bin + CLP-C350A Cyan toner + CLP-Y350A Yellow toner + CLP-M350A Magenta toner [consumables BNIB] [operable but streaky when last in service ~2015] Lot C : Samsung CLP680 A4 Color Laser Enet 230V - contains consumables, level unknown - motion fault when last used "A1-4112" + CLT-K506L Black toner [consumable BNIB] [defective "A1-4112" when last in service ~2022] While these are on the margins of classic, I'm happy to give the community first refusal on a free to a good home basis. Collection needs to be no later than next Thursday 8 December. If firm collection arrangements have not been made by CoP Sunday they will be offered on Gumtree ... If they are still here after Thursday, they may go wheee. Apologies for the short notice. Replies to ftagh(a)janefield.org will be regarded as offers. Collection offers will be considered in the round, but the early bird is likely to have an advantage, accepted offers will be honoured until the agreed collection time passes, thereafter the acceptance will lapse and they will be back in play. Martin

2 years, 5 months

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RIP Fred Brooks (1931-2022)

by Tomasz Rola

As the subject (and wikipedia) say: https://en.wikipedia.org/wiki/Fred_Brooks -- Regards, Tomasz Rola -- ** A C programmer asked whether computer had Buddha's nature. ** ** As the answer, master did "rm -rif" on the programmer's home ** ** directory. And then the C programmer became enlightened... ** ** ** ** Tomasz Rola mailto:tomasz_rola@bigfoot.com **

2 years, 5 months

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cctalk December 2022