- vcf-midatlantic - lists.vcfed.org

PC/AT power-good troubleshooting
by Richard Cini 28 May '16

28 May '16

All – I pulled my old PC/AT off the shelf to see if I could get Windows 1 running on it. It worked when shelved years ago, but it unfortunately suffered some case damage from a leaky battery. No damage to the mobo or cards thankfully. I replaced the battery with a 4-AA pack. Basically, the PC won’t come out of reset. I tested the power supply with a load tester specifically for PC power supplies and it reports power_good and all voltages look good on a meter. So far, so good. I dug out my ISA POST diagnostics card which also has a PG tester in it. This reports no_PG but I do see the reset pulse. Not sure why one would report OK and one not. I traced the PG signal from the power supply through the 82284 clock driver/ready interface chip and the PG is definitely there (transitioning L->H on power-on) and RESET is transitioning H->L. I have a spare power supply (which also tests good) and produces the same result. I have no cards installed, nor any other load on the supply (floppy and hard drives disconnected), so it purely has to be an issue with the motherboard. Any recommendations on where to go from here? Does anyone have an extra AT motherboard they would be willing to part with? Thanks! Rich -- Rich Cini http://www.classiccmp.org/cini http://www.classiccmp.org/altair32

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50 seconds in...
by william degnan 28 May '16

28 May '16

https://www.youtube.com/watch?v=j2VipiNWMWQ -- @ BillDeg: Web: vintagecomputer.net Twitter: @billdeg <https://twitter.com/billdeg> Youtube: @billdeg <https://www.youtube.com/user/billdeg> Unauthorized Bio <http://www.vintagecomputer.net/readme.cfm>

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VCF East Kenbak lecture (and bonus!) are now online
by Evan Koblentz 28 May '16

28 May '16

John Blankenbaker's speech from VCF East last month is now on YouTube: https://www.youtube.com/watch?v=OUCJXyThSXI Bonus material! Here's John (with Corey) examining the machine: https://www.youtube.com/watch?v=PDCKNDitH38

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(no subject)
by Mike Willegal 28 May '16

28 May '16

Not too many years ago, a friend found a Cray 1 that was stored in someone's garage and made a deal to buy it. Before he even took possession, he ended up trading it for an Apple 1 when he realized he didn't have a place to keep it. Who knows, there could be a few more out there in the wild. Not so many years ago, it was estimated that there were only 30 Apple 1 's remaining. New units keep surfacing every year. Regards, Mike Willegal

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Flashback Friday....
by Ethan 28 May '16

28 May '16

The encyclopedia commercials... The Apple II version: https://www.youtube.com/watch?v=lMpgcz6s-eI The DOS PC version: https://www.youtube.com/watch?v=Hxwin9XFbnQ The Amiga 2000 version: https://www.youtube.com/watch?v=ZuwbDRdCVs0

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Re: [vcf-midatlantic] Windows 1.04 SDK running in Bochs
by Blatboy 27 May '16

27 May '16

Sorry for the delay on my response here... but I was glad to be of assistance, and it was great meeting everyone! w ---- http://www.jwalterhawkes.com http://www.blatboy.com like to know where/when I'm playing? Click here <http://www.blatomaster.com/mlist.php> to sign up for my list, and let the babble begin. ------------------------------ Message: 3 > Date: Sat, 21 May 2016 18:16:59 -0400 > From: Richard Cini <rich.cini(a)verizon.net> > To: VCF-Midatlantic > <vcf-midatlantic(a)lists.vintagecomputerfederation.org> > Subject: Re: [vcf-midatlantic] Windows 1.04 SDK running in Bochs > Message-ID: <5CA0477C-B976-44D4-BA36-7B6D11AE3002(a)verizon.net> > Content-Type: text/plain; charset="UTF-8" > I should add that a huge thanks should go to Ron, Jason and Walter working > the hand-off. The materials were in a copy box, so not light by any stretch > of the imagination. Thanks guys! A great piece of history saved! > > > Rich

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The Transistor......Re: Evan @ IFIP
by Dan Roganti 27 May '16

27 May '16

On Thu, May 26, 2016 at 9:45 PM, Evan Koblentz via vcf-midatlantic < vcf-midatlantic(a)lists.vintagecomputerfederation.org> wrote: > They took us on a private tour of the old Bell Labs (now it's Nokia, which > bought Alcatel-Lucent) in Murray Hill NJ today. We spent a couple of hours > there. Photos were not allowed. Among many highlights, we saw the room > where they perfected (not "invented") the transistor > I bet you didn't say that _while_ you were visiting there :) And I would hardly call it perfected. As most academics often overlook the technical aspects. Where the 1925 FET is a voltage operated device whereas the Bell Labs Transistor is a current operated device. Two completely different animals Also, you how many of the innovations occurred in the past A lot of it was based on popularity, just look at Edison/Telsa And the 1925 FET was hardly on anyone's "radar" otherwise why did they spend the next 30yrs with vacuum tube computers iso of researching and developing that new innovation further. But it also had mostly to do with making the planar process practical enough to mass produce. Dan

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Robots and Relays and Commodore
by Chris Fala 27 May '16

27 May '16

Would this help? http://www.ebay.com/itm/152084733487

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Evan @ IFIP
by Evan Koblentz 27 May '16

27 May '16

Forgot to mention this. Tomorrow I'll be part of a roundtable discussion at an NYC meeting of the International Federation of Information Processing's history .SIG. I have 15 minutes to talk about early British mobile computers. Going to focus on Husky (which should be famous but isn't) and Psion (which needn't be famous but is).

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semi-OT: downloading vintage computer document
by Dan Roganti 27 May '16

27 May '16

anyone have some tricks up their sleeve to extract the pdf from this link ? it appears to be hiding behind a java servlet a site search falls into the same trap this might interest some of you too http://www.osti.gov/scitech/servlets/purl/5054065

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