test-drb March 2022

test-drb@ccmp.vtda.org

87 participants
62 discussions

LSSM is chasing this, was Re: General Data? Computer

by dave.g4ugm＠gmail.com

I missed a lot of this because g-mail decided to bounce some e-mails. I would like to make a couple of observations:- 1. Many real accredited museums have a smaller percentage of their artifacts on display than private collectors. In the UK both TNMOC and the Science Museum Group have large quantities of hardware that is not displayed. The science museum usually catalogues it but it is not really helpful if you can't see it. 2. All the private collectors I know are very happy to show and demonstrate what they have. It might not be catalogued so well but generally they want to show it off.... Dave G4UGM (Now feeling guilty because what I have is neither catalogued or on display)

2 years, 9 months

IBM 5110 (5100) schematics ?

by bhilpert＠shaw.ca

Does anyone have or know whether the schematics for the IBM 5110 or 5100 are available? And the tightly related question of whether anyone has done ROM (ROS) dumps? There are some service manuals on bitsavers, they are field-service board-level manuals, mostly step-by-step problem resolution guides, no schematics. As a system, it's small enough to be reverse-engineered, in that regard it's tractable. However, it's implemented using IBM's mid-70s PCB and IC technology, increasing an RE effort by a couple orders of magnitude if not approaching impossible, unless one were to develop some robotic probing system and software. There was a 5110 on ebay, non-working, that a friend had some interest in. It was quite a gamble at the price, in the absence of real tech info. ... Apparently it's been delisted, so my question is just curiousity at this point.

2 years, 9 months

WTD - Oregon/Taumetric M68000 Pascal and Cross Assembler (VAX/VMS)

by classiccmp＠philpem.me.uk

Hi all, Does anyone happen to have a copy of these squirrelled away? - Oregon Pascal M68000 -- cross compiler for VAX (or any other host platform). Probably called "P68.EXE" or something similar. - Oregon / Taumetric M68000 Cross Assembler for VAX (or any other). Probably called "MASM.EXE" or similar. - Oregon / Taumetric M68000 Linker for VAX (or any other). Probably called "MIL.EXE" or similar. The assembler and linker might be ports of Motorola's M68KMASM and M68KLINK -- so something equivalent which takes the Motorola-format .SA files and spits out .RO files should work instead. I've been tasked with getting some ancient code building again, and as usually happens, the "backup" is incomplete... Thanks, -- Phil. philpem at philpem.me.uk https://www.philpem.me.uk/

2 years, 9 months

IBM 5110 (5100)

by organlists1＠sonic.net

Was the computer auction in question a 5100 or a 5110? Presently I see there is a 5110-C for sale https://www.ebay.com/itm/294865912729 There were also a 5110 with 8" external drives and a printer which sold: https://www.ebay.com/itm/304377532685 Don Resor

2 years, 9 months

Does anyone/museum test disk packs?

by barythrin＠gmail.com

I was visiting a new thrift store and saw a disk pack they had. I joked that mine are just fun display/conversation pieces. Do the giant drives suffer the same head crash issues that a bad zip disk can do or are these safe if someone actually wanted to see what was on them?

2 years, 9 months

Does anyone/museum test disk packs?

by jfoust＠threedee.com

At 08:25 PM 3/16/2022, John Herron via cctalk wrote: >I was visiting a new thrift store and saw a disk pack they had. I joked >that mine are just fun display/conversation pieces. Wait.... you bought it, right? Was it $2? - John

2 years, 9 months

Commodore vic 20 poweroff

by bryce.diedrich＠intel.com

Just got a Commodore Vic-20. What is the safest way to power it off when I am done using it? Bryce Diedrich

2 years, 9 months

VCF East 2022

by mloewen＠cpumagic.scol.pa.us

Exhibitors wanted! Deadline to apply is April 1. Exhibits are NOT limited to the shows two main themes. "Ever wonder about the roots of today?s technological society? Did you spend Covid nostalgically playing old video games from the past on an emulator? Do you want to get hands-on with computers ranging from the 1960s thru the early 1990s? Come to the Vintage Computer Festival East in Wall, NJ on April 22nd thru April 24th, 2022. On Friday, April 22nd, there are classes in everything from programming the Apple II computer to "learn to solder" sessions for both kids and adults. You can even solder together your own Intel based computer with our partner GlitchWorks. On Saturday and Sunday (April 23rd & 24th), join us for hands-on exhibits of vintage and classic computers along with talks from the people who were at the beginning of vintage computer history. Learn how vintage computers lead to today's world of technology becoming commonplace instead of niche hobby. This year we have two themes for our weekend talks: Women in computing and Computers for the Masses. Talks include a reunion of Commodore employees talking about their days working at Commodore Computers as well as the creators of the Commodore Vic-20 and C64. Talks by Margaret Morabito, the editor of RUN magazine. Learn the history of video game programming starting with the Atari 2600 to modern times with Burger Becky a long-time veteran of the video game industry. Consignment sales will be open all weekend where our members will be selling everything from vintage Apple to Zenith computers and everything in between, as well as parts for computers, peripherals, and other vintage computer equipment. Who knows, you may find the items to complete your nostalgic journey back to the 1980s. Will you find the personal and home computer that you have been looking for? Learn more about the Vintage Computer Festival East at https://vcfed.org/wp/events/vintage-computer-festival-east"

2 years, 9 months

Vic-20 Power off.

by richardrpope2＠gmail.com

Diedrich, Just unplug it. I owned one for years. Thanks, Richard Pope

2 years, 9 months

Seeking a MC75325L Dual Memory Driver

by pbirkel＠gmail.com

I have here in my hands a DEC H222A (16Kx18), part of a MM11-DP, that took a blow at sometime in the past. In consequence there are a number of small parts damaged (snapped diode, crushed axial electrolytic, chipped mica capacitor, cracked/broken SIP resister net) but those all appear to be relatively easy to replace. What's not so easy to replace is the MC75325L Dual Memory Driver (L = Ceramic) that was de-lidded in the process :-<. I am wondering whether anyone has one of these ICs in their spare parts drawer that I could acquire? I do see a MC75325P (plastic) on eBay at littlediode_components for ~20USD, plus a surprisingly modest shipping charge (Royal Mail International). UTSOURCE claims to have a supplier of the ceramic part "new", with a significantly higher shipping charge. Before I go with the ceramic part (IMO not the sort of packaging that gets . remarked) I thought that I would check here for alternative sources. Thank you, paul

2 years, 9 months

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test-drb March 2022