- vcf-midatlantic - lists.vcfed.org

Who's an ACM member?
by Evan Koblentz 22 May '19

22 May '19

I need to read a paper from 1978: https://dl.acm.org/citation.cfm?id=1198367

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Hayes 1200
by Mike Loewen 22 May '19

22 May '19

The most expensive Hayes modem, ever! https://www.ebay.com/itm/Hayes-Smartmodem-1200-with-Power-Supply/2026859300… Free shipping, too. :-) Mike Loewen mloewen(a)cpumagic.scol.pa.us Old Technology http://q7.neurotica.com/Oldtech/

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Museum report
by Evan Koblentz 22 May '19

22 May '19

Interesting day. I arrived around 11:30 and caught the end of the IEEE milestone plaque ceremony at the Diana/TIROS site. Then I did some museum maintenance for a while. One visitor distinguished herself: an IEEE local section officer who stayed for a thorough tour. Turns out she once worked with Isaac Asimov!

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Re: [vcf-midatlantic] Maker Faire this year
by Evan Koblentz 22 May '19

22 May '19

Yes please -- Kenbak! On Wed, May 22, 2019, 12:46 PM Alexander Pierson via vcf-midatlantic < vcf-midatlantic(a)lists.vcfed.org> wrote: > Two machines come to mind:The uKENBAK-1 and the ELF membership card. I > have the former, and I'm willing to lend that, but the latter I'm sure > someone else has on hand. > -Alexander 'Z' Pierson > > > On Tuesday, May 21, 2019, 11:24:56 PM EDT, Evan Koblentz via > vcf-midatlantic <vcf-midatlantic(a)lists.vcfed.org> wrote: > > Everyone, > > This year's idea for our World (NYC) Maker Faire exhibit is > replicas/workalikes. > > The registration opens next month, so for now this is conceptual. > Me/Dean/Jeff/Corey are planning it behind-the-scenes. > > We will bring: > > - Replica 1 (Not a Mimeo, because the former is hobbyist-friendly; > latter is for true aficionados) > > - Altair Mini > > - PiDP > > - Kim Uno > > - Commodore Mini > > - Glitchworks 8085 > > - Atari Flashback (maybe) > > Two questions: > > - Does anyone have Oscar's PDP-11/70, and if so are you willing to loan > it to us or (better yet) exhibit it personally at the event? > > - What other replica hardware should we consider for this exhibit? > > >

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Re: [vcf-midatlantic] OT: NJARC YouTube
by Alex Duboski 21 May '19

21 May '19

Done

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DC area people: Fwd: Vintage Computer Books
by Evan Koblentz 20 May '19

20 May '19

See below. Reply directly to Gerald, NOT to this list. PS. Attachments don't work well here, so I put his books photo at https://tinyurl.com/y5lc3af7. Nothing that the VCF museum needs. -------- Forwarded Message -------- Subject: Vintage Computer Books Date: Mon, 20 May 2019 21:35:38 -0400 (EDT) From: GERALD TERLITZKY <gterlitzky06(a)comcast.net> Reply-To: GERALD TERLITZKY <gterlitzky06(a)comcast.net> To: evan(a)vcfed.org Good Evening, I found your name on the VCF Museum site by accident. I have a friend that develop Parkinson disease 5 years ago and I had to put him into an assisted living facility. He work as an computer operator for the Washington Gas Light company back in the 70's. I've been cleaning his house out for the past 6 weeks. He has a collection of computer books around 100 total. I'm attaching a picture of books in his library. I would like to sell them all, but I'm located in Bowie Maryland. Maybe you might know someone in the Washington Metro area that you can suggest for me to contact. All the funds that I make goes towards his living expense. Sincerely, Gerald Terlitzky

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Scopewriter Issue Resolved.
by Herb Johnson 20 May '19

20 May '19

> It’s interesting how many of the hobby designed products from the mod 70’s have marginal aspects to their designs. Whenever anyone recreates or restores any old electronic device, it often can be a tricky problem to determine whether a problem is introduced or original to the design > > regards, > Mike Willegal The very earliest microcomputers or microprocessor-based things from the early to mid-1970's, were often designed by people new to microprocessors and/or TTL logic. Some of course (TV Typewriter) were all TTL logic. The very earliest microprocessors needed odd voltages and timings. So some of the logic design was a bit, er, funky. A common practice was to use a resistor/capacitor circuit (R/C circuit) to create timing delays, or turn level-shifts into pulses. These don't age well, and didn't work well when new. The IMSAI front panel has a couple of these. Also, "straight" TTL draws a lot of current; later LSTTL and much later ALSTTL draws less current and is faster. Early CMOS was challenging too. Things got better, later on. And some brands (Compupro, etc.) produced pretty solid designs from the start. These are restorer's considerations which aren't documented. It's part of the fun, in my opinion. Notably, Herb Johnson Herbert R. Johnson, New Jersey in the USA http://www.retrotechnology.com OR .net preserve, recover, restore 1970's computing email: hjohnson AT retrotechnology DOT com or try later herbjohnson AT retrotechnology DOT info

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For Sale/Trade: AMD 5x86 DOS PC
by Vincent B 20 May '19

20 May '19

Looking to part with a "Baby AT" AMD 5x86 DOS PC that's been in my closet unused for a few years. Specs are as follows: 486 VLB system in a mini tower: Case has 2 x 5.25" slots and 2 x 3.5" slots. Includes 1.44 and 1.2MB floppies, IDE CDROM (have not checked if it reads CDR's and it is easily replaceable). Power, Turbo, Reset buttons, LED speed indicator (set to 133 and 8mhz currently) Hint 486 motherboard with 2 VLB slots (both used) and ISA A coin battery holder has been installed after the rechargeable one was removed (mounted on case wall for easy access) Evergreen CPU upgrade AMD 5X86-133 P75 X5 (its an AMD 486/133 surface mount CPU with jumper configurations and a small heatsink no fan runs very cool) 32MB RAM (8x4MB 30 pin SIMMS) Seagate ST 51080A 1083MB HD, no bad sectors. 1993 STB VLB Horizon video card (1MB I think CL-GD5426). CT28040 SB16 sound card 3COM Etherlink II/16TP Ethernet card VLB HD I/O card Looking to either sell it outright or trade it for an Atari ST. Contact me off-list to make a deal. <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai…> Virus-free. www.avast.com <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai…> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>

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Museum Report 2019-05-19
by Jeffrey Brace 19 May '19

19 May '19

We still had visitors in spite of the nice weather. A father and his college-age daughter came in and he explained how modems worked to connect to other computers. She seemed perplexed. In the "Everything on this wall now fits into your pocket" display, the daughter couldn't identify the fax machine or digital answering machine, but she identified the Magellan GPS navigator. I like to quiz "younger" people on what the devices are in the display to see how they are unrecognizable to the younger generation. The next visitors were grandparents with their grandson of about 11 years old. I had him type in a short BASIC program on the C64 with the bouncing ball. He liked it so much that he recorded it on his iPhone. He typed it in pretty well, but I had to help him debug it. Then two couples with high interest. One of them did a picture on deluxe paint and took a picture of his masterpiece. -- ========================================= Jeff Brace Vice President Vintage Computer Federation <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai…> Virus-free. www.avast.com <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai…> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>

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Re: [vcf-midatlantic] Help with installing 1980s DOS program
by Devin Heitmueller 19 May '19

19 May '19

Hi Herb, On Fri, May 17, 2019 at 11:16 AM Herb Johnson via vcf-midatlantic <vcf-midatlantic(a)lists.vcfed.org> wrote: > Evan is correct. That is, this user wants what he wants for the reasons > Evan stated; and not as Devin speculated. This caught my attention, > because I resell old Macintosh computer parts and systems. "Old" as in > 68K and PowerPC based, 1980's and 1990's. <snip> Fair enough. I've done my share of maintaining legacy equipment when I was working at the Bell Labs EMC lab, where the computers running the test chambers were considered to be "calibrated equipment" and thus had to be 10+ year old AT&T PCs. I can appreciate the cases where this sort of thing would be necessary. I wouldn't have assumed this to be the case for a lawyer, since most of the ones I know have to share documents electronically with others (or have paralegals that weren't alive in the 1980's that they expect to be able to edit documents), and thus wouldn't still be using ancient word processors. That said, supposedly George R.R. Martin writes his books on WordStar, so I guess anything's possible. Cheers, Devin -- Devin J. Heitmueller http://www.devinheitmueller.com

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