test-drb

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101090 discussions

Quantum 2080 and 540 service manuals

by jnc＠mercury.lcs.mit.edu

> From: Al Kossow > These showed up on eBay, I'd been looking for them for over twenty years As in, 'you all shouln't bid on those so I can grab them'? Or do you want someone here to get them, and send you scans? If the latter, people should co-coordinate so they aren't bidding against each other. Noel

6 years, 5 months

Teletype BRPE 8-level punch blocks

by aek＠bitsavers.org

https://www.ebay.com/itm/174096548679 in case anyone saw these and wondered what they're for

6 years, 5 months

Connecting LK250 to VAXmate

by robert.jarratt＠ntlworld.com

I recently acquired a VAXmate with an LK250 keyboard. The problem is the keyboard came without the cable. It uses an 8-pin SDL connector and the usual tiny MMJ-like connector at the keyboard end. I don't know the pinout and I don't have the necessary crimping tools, is there any source for such a cable? Thanks Rob

6 years, 5 months

Xerox 820 PC

by jim＠photojim.ca

With permission, I?m forwarding this email about a Xerox 820-II that?s available in Regina, Saskatchewan, Canada. (I live in Regina, and know Steven.) Feel free to contact him directly. He?s also available by IRC; email me directly for server details. Jim From: Steven Brown [mailto:tuxsteve at gmail.com] Sent: Wednesday, November 13, 2019 10:01 PM To: buysell at losurs.org; Q&A LOSURS <q&a at losurs.org> Subject: [LOSURS: buysell] Xerox 820 PC My dad worked at Xerox for over 20 years here in Regina. A former co-worker of his called him to see if he knew anyone who might be interested in taking ownership of a Xerox 820 he has. Still works apparently. Specs can be found here: https://oldcomputers.net/xerox-820.html He sent along the following information: " This is a xerox 820 II antique, black & white screen, 8? HD and a dual 8? floppy unit, has the 8 and 16 bit intel processors. If one was interested in playing with the old stuff. Tried to give it to Western Development museum but they only want stuff that relates to Saskatchewan. Oh yes it is a com base operating system " He mentioned it comes with a pile of software as well. Picture sent isn't very good but here it is: https://imgur.com/a/CzH5FHz If anyone is interested please let me know. If anybody knows of a person or institution who may be interested, please let me know. Regards, Steven Brown

6 years, 5 months

WANTED: iSBC-202 microcode image

by fulivi＠tiscali.it

Hi everyone, I'm planning to expand my MAME-based emulation of Intel MDS-II systems with the support for double-density floppy disks. In particular, I'm thinking of emulating the isbc202 floppy controller because its architecture looks very interesting. This board was based on Intel's own 3000-series bit-slices. A necessary step for this work is finding the image of the 4 microprogram PROMs on the controller board. Has anyone on this list ever dumped these memories, please? Can you share the binary images with me? Of course, I'm going to properly credit you in the emulator sources. AFAIK this would be the first emulation of a Intel 3000 system. A side question: do you happen to know if the Intel CROMIS assembler for 3000 series has ever been preserved somewhere on the Net? The manual says it was provided to user as a set of FORTRAN IV sources. Thanks in advance for your help. --F.Ulivi

6 years, 5 months

ge first transistors

by couryhouse＠aol.com

g11? for ana log? and g11a? for? digital and pulse we have a G11A? new in box unused? with cellophane surround available? respond off list

6 years, 5 months

Freebies (documentation) France and online

by sales＠elecplus.com

http://matthieu.benoit.free.fr/databooks.htm Looks like a fellow in France wants to give away/trade a lot of documentation. https://www.intel-vintage.info/ https://www.intel-vintage.info/intelotherresources.htm Note the Copyright says no copyright, take what you need freely. There is a LOT of interesting stuff on this site. http://www.ebyte.it/library/refs/SoftwareOnlineTexts.html http://gordonbell.azurewebsites.net/digital/decmuseum.htm more DEC stuff than I have ever seen together. Cindy Croxton

6 years, 5 months

Xref

by sales＠elecplus.com

Does anyone have a copy of this, or something similar? Prefer digital format, if possible. Jameco Part number 159791 $29.95 61140 SEMICONDUCTOR CROSS REFERENCE on CD-ROM Enhanced Version A complete guide to semiconductor replacement and substitutions from the makers of PHOTOFACT(R) service documentation. More than 490,000 part numbers, type numbers, and other identifying numbers listed. Includes part numbers for the United States, Europe, and the Far East. Covers all major types of semiconductors: bipolar transistors, FETs, diodes, rectifiers, ICs, SCRs, LEDs, modules, and thermal devices. Replacement for NTE, ECG, Radio Shack, and TCE - four cross references in one! Up-to-date list of original equipment manufacturers. The most comprehensive replacement data available for engineers, technicians, and all those who work with semiconductors. Minimum System Requirements: Windows 95(R) or higher and 60 MB of free disk space C 1998 Howard W. Sams. All Rights Reserved. http://www.hwsams.com Thanks! Cindy Croxton

6 years, 5 months

AED WINC08

by jsw＠ieee.org

On 11/11/19 12:27 AM, Eric Moore via cctech wrote: > Hello, I have a working AED WINC08 drive, which is a winchester drive > emulated to look like an RL02, along with the qbus controller card. > > https://archive.org/details/bitsavers_aedbrochurJan82_2107642/page/n1 > > The winchester drive itself is a fujitsu M2302B. One of the disks (it shows > up as 2 10MB volumes in RT-11) is having write issues. How can I find a > replacement disk drive in working order? The 2302b has a shugart compatible > interface, so should any shugart compatible 8" winchester drive work in the > aed winc08 rl02 emulator? > > What other options do I have to attach a winchester drive to an 11/03 for > use in rt-11? I have an RL02 I have never hooked up, do the disk packs hold > up well over time? How hard is it to clean and align an 8" winchester drive > to try and address the write issue? > > Thank you, > > -Eric In my (pre) historic use of products similar to this one, it was rare to swap the vendors drive with a completely different drive. The controllers, their electrical interfaces and recording formats were tightly coupled to the disk drives implemented. My suggestion would be to look for a QBus SCSI Controller like the Emulex UC07 or Dilog SQ739, though both are a bit pricey. These open up a large number of drives to use and later versions of RT11 support the MSCP protocol the controllers emulate. The use of the SCSI2SD drive emulator gives even more flexibility through the use of microSD cards. Google around for both. I have an pair of RL02 drives. I keep them clean and power them up for short periods regularly. You need to be alert to potential issues with electrolytic capacitors drying out and causing problems in the power supplies and circuit boards of all devices of from this era. See http://www.vcfed.org/forum/showthread.php?72247-Dismantle-an-RL02-pack for a recent discussion and pictures of some of the material in the packs decaying over time. Jerry

6 years, 5 months

Looking for documentation for VAX-11/730 ENKCC Diagnostic

by derschjo＠gmail.com

Hi all -- The VAX-11/730 we have running here at the museum has developed a fault that occurs only sporadically, usually days apart. Running the complete diagnostic suite for the better part of a week reveals this: SECT TST ERR EXP REC OTHER MSK MODULE ENKCC 33 08 000000FF 000000DF N/A FFFFFF00 M8391 M8728 Re-running only ENKCC, this error is repeatable (though it still takes a couple of days for it to occur). It helpfully points out the MCT (M8391) and memory boards (M8728) as possible causes; we have spare M8728s and I've swapped them around with no change in behavior. I have a spare M8391 in my own collection but it fails in a completely different way so that's not much help. I cannot find any real documentation for ENKCC so I don't know what TEST 33 is doing, nor what ERROR 8 indicates in this context, though it seems we're dropping a bit somewhere :). Anyone out there sitting on a pile of 11/730 documentation? Thanks as always! - Josh

6 years, 5 months

Printers in Manchester UK

by dave.g4ugm＠gmail.com

Folks, Any one got any interest in any dot-matrix printers. Got a Panasonic wide carriage, DEC narrow carriage, and a Tandy DMP200.. Dave Wade G4UGM & EA7KAE

6 years, 5 months

IBM Rigid Cleaning Tool 2200574

by Charles.West＠daystar.com

Chas and chon here at Daystar Television do you have or can you refer us finding

6 years, 5 months

Remex reader/punch PDP-11 interface board manuals on eBay

by steven＠malikoff.com

Just wondering if anyone on the list is going after these 1973 Remex manuals for the PDP-11 interface to their reader/punch units? https://www.ebay.com/itm/274092453978 https://www.ebay.com/itm/274092431915 I have two of the reader-only version of this board I bought relatively cheap off eBay some years ago and would be happy to trade or pay for a scanned copy if required. As I don't have a Remex reader/punch it would save me bidding up the price unnecessarily. Steve.

6 years, 5 months

New website has gone live

by cube1＠charter.net

After months of procrastination and work, my new website has gone live at: https://www.computercollection.net/ It is a nearly complete makeover. The home page also has a link to what my site used to look like. (Context: The website used to be at webpages.charter.net/thecomptuercollection . However Charter/Spectrum dropped support of subscriber home pages, so I had to move it to a hosting service, which I did last year - pretty much intact as it had been. That then opened up the opportunity for the website to have a lot more images and capabilities - the new website is the result. JRJ

6 years, 5 months

Anyone have docs/jumper settings for Tecmar "PC 500K/1MEG FLOPPY CONTROLLER" ISA card ?

by rescue＠hawkmountain.net

I have one of these, it has 2 jumper blocks, JPR2 (4 3 pin jumper 'settings'... looks to probably latch each of the 4 high or low) and JPR3 (12 on/off jumper positions). It also has a JPR1 which would be a 3 pin header and it is strapped by wire to position 1-2. Would love to figure out how the IO port and IRQs are configured. Card has no BIOS, so unlike a WD1002A-FOX there won't likely be any jumpers to set drive type. (I'm not having much luck with that card in a Tandy 2500 SX... but that's a completely different issue). Hopefully someone has or knows where there are some docs on the jumper settings. I'd imagine I could figure out some by probing which ISA pins various jumpers connect to..... but any jumper settings that control chips for decoding logic will be far more difficult to determine. Thanks, -- Curt

6 years, 5 months

swtpc.com expired???

by wh.sudbrink＠verizon.net

Domain has been down for 7 days now. No reply to emails. Does anyone know anything? -----Original Message----- From: William Sudbrink [mailto:wh.sudbrink at verizon.net] Sent: Monday, November 04, 2019 12:29 PM To: 'General Discussion: On-Topic and Off-Topic Posts' Subject: swtpc.com expired??? Anybody know if Mike Holley is OK? Bill S. -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

6 years, 5 months

SUN Diagnostic Executive

by cc＠informatik.uni-stuttgart.de

I'm encountering some strange and severe failures on our 4/260 and therefore I'm looking for a dump/tape image of the Sun-4 Diagnostic Executive. The manuals are online but not the tape, so I hope someone has made a dump. Thanks, Christian

6 years, 5 months

Classic equipment available & my bad year.

by dave.dunfield＠gmail.com

Hello Everyone. I have had a major health incident which means that I have been unresponsive for several months. As I need to move in closer to town, I will be disposing of what remains of my collection (Things like: Altairs, Imsa, PET 2001, Apple II, TRS-80s, lots of S100 carts etc.) I have posted some preliminary information at: http://www.classiccmp.org/dunfield/sale.txt This will be updated on a regular basis. If you are interested in what happened to me, I have posted some details at: http://www.classiccmp.org/dunfield/2019.txt Dave Dunfield

6 years, 5 months

[Cadetwriter] Announcements

by dave＠babcock-family.org

To all, The Computer History Museum's IBM 1620 Jr. project team has several announcements about Cadetwriter: 1)? Congratulations to Paul Williamson as the first person, besides our project team, to successfully build his own Cadetwriter.? We know that a number of people are building or planning to build one, but Paul is the first person we've heard from that has completed it. ??? If you are building, or planning to build, a Cadetwriter, please let us know about it. ??? Paul's WheelWriter 1000 seems to have a different version of the logic board and/or its firmware than the CHM WheelWriters. This exposed several issues that Paul diagnosed which led to changes in the Cadetwriter firmware that make it more robust. 2)? A new version (5R5) of the firmware is available with these important changes: ??? -? Added support for semi-automatic paper loading. ??? -? Increased the Interrupt Service Routine delay time to deal with overlapping column scans. ??? -? Adjusted the timing of unshifted, shifted, and code characters. ??? This firmware is available at: https://github.com/IBM-1620/Cadetwriter 3)? There is a new Cadetwriter message board at: https://cadetwriter.slack.com ??? There are actually 5 channels available: ??? -? Cadetwriter/announcements - for announcements of new versions of the firmware, documentation, hardware, etc. ??? -? Cadetwriter/description - for a general description of Cadetwriter and links to resources. ??? -? Cadetwriter/building - a discussion forum for those building a Cadetwriter. ??? -? Cadetwriter/operating - a discussion forum for those using a Cadetwriter. ??? -? Cadetwriter/suggestions - a discussion forum for proposed additions/changes to Cadetwriter. ??? If you have interest in Cadetwriter, please register and participate in the discussion. Thanks, IBM 1620 Jr. Team

6 years, 5 months

SOT - Grab first and ask questions later

by trash80＠internode.on.net

I suspect a number of members are like me - when there's salvage or rescue stuff on the radar you grab first and ask question later otherwise tomorrow it might not be there. I quite like those picker shows and subscribe to their philosophy "buy (or grab) it when you see it". I'm still ruing the day I let a TRS-80 Model II with a full set of floppy drives go by procrastinating as I haven't seen one since. Anyway a little while ago someone I know was quitting their business and gave me all their office salvage - laptops, PC's, printers, KVMs, routers, monitors etc etc. As before I did not ask any questions and did not look the gift horse in the mouth. The other day I needed a CD drive for a little project and went through the stuff , found something promising and opened it up. Anyway they'd been doing all their "business" in there (number ones and twos amongst many other things I suspect) and the machine was a write off. I suspect finds by other list members have been even more "interesting" http://koken.advancedimaging.com.au/index.php?/albums/interesting-finds/ Kevin Parker

6 years, 5 months

ISO: Monochrome monitor suitable for use with VAXStation 2000

by derschjo＠gmail.com

I'm looking for a VR260, VR262, VR150, or similar. Working or not, as long as it's complete and not falling apart. Thanks in advance! Josh

6 years, 5 months

SpaceWar without needing an EAE for PDP8 /E /F /M /A

by roelof_klaas＠yahoo.com

Hello everyone, I've been playing with SpaceWar for my PDP8 Omnibus machines. Since I don'thave the EAE option I've made the LAB8 / AX08 version work on the VC8E. So now you can run Evan Suits SpaceWar version on an Omnibus machine and you don't need an EAE.? https://github.com/Roland-Huisman/SpaceWar And for those who might not have the VC8E graphics boards I've designed74xx clone boards. These are my VC8E (M869 / M855) clone boards: https://raw.githubusercontent.com/Roland-Huisman/Digital_VC8E_M885R_Digital… And this is the DK8E RTC clone (M882) which I'm using. https://raw.githubusercontent.com/Roland-Huisman/Digital_DK8E_M882R_Mains_R… There are a few more board clones on my GitHub like the RX8E (M8357) for the RX01/RX02 or TA8E (M8331) for the TU60 if anyone would be interested. With the gerber files andpart lists you should be able to make your own boards. They are all 74xx clones sono hard to find DEC chips on it... I'm not very active on cctech and I guess some people on cctech are maybe not active on vcfed.So I thought it is nice to mention it here too... Regards, Roland

6 years, 5 months

Classic equipment available & my bad year.

by marvin＠west.net

Dave, sorry to hear about your situation. Regarding system/parts/etc. selling prices, I use something called TeraPeak. It is available on a subscription basis with the downside that it is now part of Ebay... I quit them in 2015 with no current plans of ever having anything to do with them, but is still the best way I've found to get pricing on what sells and how much. It normally has the actual selling price as opposed to the "asking" price on the main listing. Because the prices on TeraPeak are the actual selling prices inflated by the eBay fees and "free" shipping, I generally reduce them by around 20% - 30% to get realistic pricing (rare items excepted.) Another what appears to be similar service is Worthpoint. Although I've looked at it, I have never actually used it. Like you, I had plans of starting a museum and thus have stuff that I haven't been able to find pricing information using either TeraPeak or Google. That would include rare terminals (i.e. Hazeltone, ), some computers (Philips word processors, Wang, etc.), documentation (IBM, Burroughs, a variety of printers, etc.) and a lot of other "stuff" (including some of the stuff you have listed.) How many people have heard of DMA Systems? Since I live in Santa Barbara where a number of computer, software, peripheral were made, I decided to keep anything made in the Santa Barbara and still have plans for a museum dedicated to what was made here. That is something you might find possible in your area. Another thing I'm "collecting" is anecdotes about computer collecting in the Santa Barbara area. Two examples are where how the name Pickles and Trout came about, and Lobo drives being named after Roger Billings (formerly Production manager at Polymorphic) pet wolf, etc. You might also consider writing a book documenting some of the knowledge you acquired about computers, etc. In any case, it sounds like you are well on your way to recovery. So my best to you and your family during this recovery period! Marvin > Thanks to everyone for the kind words on my situation. > > Had lots of correspondence from various people interested in > certain systems, but no offers, and very little information on > what people think they are worth. Many of these systems are > very old, very rare and nearly impossible to acquire. As I am no > longer working I want to maximize what I receive from them. > I will be researching this over the next year and will add prices > if/when I work them out. If price is unknown I will take the highest > reasonable offer, so I cannot offer systems now without an idea > of what they are worth to you.

6 years, 5 months

191109 Classic equipment available & my bad year.

by dave.dunfield＠gmail.com

191109: Added PDP-11s, KIM1, EDB9301, MMT-85 & FloppyDrives Thanks to everyone for the kind words on my situation. Had lots of correspondence from various people interested in certain systems, but no offers, and very little information on what people think they are worth. Many of these systems are very old, very rare and nearly impossible to acquire. As I am no longer working I want to maximize what I receive from them. I will be researching this over the next year and will add prices if/when I work them out. If price is unknown I will take the highest reasonable offer, so I cannot offer systems now without an idea of what they are worth to you. Had several messages asking about other systems I show on "Daves Old Computers". I have been dealing with several collectors in Toronto and Ottawa, and any systems not listed in sale.txt is already gone (still taking inventory so may add a few more, as well as a LOT of other technical stuff. > --- Original Message --- >I have had a major health incident which means that I have been unresponsive >for several months. As I need to move in closer to town, I will be disposing >of what remains of my collection (Things like: Altairs, Imsa, PET 2001, >Apple II, TRS-80s, lots of S100 carts etc.) > >I have posted some preliminary information at: > > http://www.classiccmp.org/dunfield/sale.txt Dave

6 years, 5 months

Classic equipment available & my bad year.

by harper＠secureoutcomes-hq.com

><snip> >I have had a major health incident which means that I have been unresponsive >for several months. As I need to move in closer to town, I will be disposing >of what remains of my collection (Things like: Altairs, Imsa, PET 2001, >Apple II, TRS-80s, lots of S100 carts etc.) Best Wishes Dave. Jack ---------------------------------------------------------------------------------- Jack Harper, President Secure Outcomes Inc 2942 Evergreen Parkway, Suite 300 Evergreen, Colorado 80439 USA 303.670.8375 303.670.3750 (fax) http://www.secureoutcomes.net for Product Info.

6 years, 5 months

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