test-drb November 2012

test-drb@ccmp.vtda.org

173 participants
212 discussions

OSCAR [was RE: Big Alphas (was Re: FS: HP AlphaServer DS15)]

by RichA＠vulcan.com

From: Ethan Dicks Sent: Friday, November 16, 2012 9:25 AM > One interesting historical note - it was formerly OSCAR, the card > catalog computer for the Ohio State University library system. Wow. I remember when OSCAR was maintained on the administrative IBM System/370 over in that building north of the library. The VAX was not even a design idea yet, of course, when I first met OSCAR. (I worked in the library from September 1973 to August 1975, first on the shelving crew and after 1 quarter at the circulation desk. When I told my Stanford students later that programming paid better than shelving books at the library, I knew what I was talking about.) Rich Alderson Vintage Computing Sr. Systems Engineer Vulcan, Inc. 505 5th Avenue S, Suite 900 Seattle, WA 98104 mailto:RichA at vulcan.com mailto:RichA at LivingComputerMuseum.org http://www.LivingComputerMuseum.org/

11 years, 7 months

discrete transistor computer

by elson＠pico-systems.com

There are several discrete transistor computers posted on the net, some with complete schematics. http://hackaday.com/2012/04/20/building-a-computer-with-discrete-transistor… There was a German (possibly Dutch?) guy that made a discrete transistor computer using all one kind of SMT transistor and other SMT components on PC boards, it was the size of a shoebox. I can't find the link now. Jon

11 years, 7 months

Don Maslin collection status

by fjkraan＠xs4all.nl

On 2012-11-15 23:41, mc68010 <mc68010 at gmail.com> wrote: > the names of all the disks are limited to eight characters. That would > sort of indicate they were files on something. The two images of the list I got from Don were TD0 files, TeleDisk image files. EPSNQX10.TD0 and EPSNVLDC.TD0. They came in a zip EPSQX.ZIP. Some extra, 'unsorted' zips were EPSQX-B.ZIP, EPSQX-D.ZIP and EPSQX-E.ZIP. Fred Jan

11 years, 7 months

Has anyone heard from Dave Dunfield?

by aek＠bitsavers.org

I tried sending a message to him at the dave12 address and didn't hear anything back then I noticed he hasn't posted anything here since March.

11 years, 7 months

IBM PC replica

by brain＠jbrain.com

Is this old news: http://www.mtmscientific.com/pc-retro.html -- Jim Brain brain at jbrain.com www.jbrain.com

11 years, 7 months

discrete transistor computer

by ed.spittles＠gmail.com

On 29 Apr 2012 at 18:46, Richard Smith wrote: > This thread reminds me of a computer we built at school from discrete > transistors. Each transistor was a NOR gate with three resistors on > the base and a collector resistor. All soldered onto squares of tag > board. We put a bunch of them together to build a shift register with > small laps as output. That would be about 1969 or 1970. Does anyone > remember any more? It must have been a published design somewhere. Richard, I think I read the book this project was based on - in the school library, mid-to-late 70's. I've been looking for it, but my recollection is so vague I haven't found it yet. I think it may have kicked off with some physical computing based on wood and ball bearings, but anyhow it worked up to a full serial CPU. My searches have been based on the recollection that the author was Wilkinson (but maybe Wilkins, Watson, Wilson, Watkins, Watkinson, ...) and, of course, it might not even have starte with W. Any info about your school or the specific teacher might help track it down. Or maybe someone here can remember it? Cheers Ed

11 years, 7 months

Drool!!!

by robert.jarratt＠ntlworld.com

http://www.ebay.com.au/itm/Digital-DEC-VAX-11-750-mainframe-vintage-retro-co mputer-not-PDP11-microvax-/251180977499?pt=AU_Computers_Vintage&hash=item3a7 b8d8d5b Regards Rob

11 years, 7 months

Midwest show: C4 2013

by silent700＠gmail.com

The C4 Commodore show, held every summer near Cincinnati, Ohio, did not happen this year due to lack of funds. The loyal Commodore scene doesn't want to make it two years in a row, so they are experimenting with pre-funding the show this time around: https://www.crowdtilt.com/campaigns/c4-expo-2013 For this iteration they will be following the model set by Chicago's VCFMW/ECCC and opening their show up to all sorts of vintage computing, as well as extending the event to two days. The tentative date is the weekend of June 8, 2013. Like our show, no admission will be charged, but any donations are greatly appreciated. At this time I am not part of the planning process for the show but I do plan to make a donation and, work schedule permitting, attend. Questions should be directed to the contact address on the page above. >From what I've heard, the venue alone is worth the trip. (Also the USAF Museum at Wright-Patterson AFB, which I have been to, can easily eat up a whole day.) -- silent700.blogspot.com Retrocomputing and collecting in the Chicago area: http://chiclassiccomp.org

11 years, 7 months

Ton of IMSAI stuff in New Mexico...

by bdamer＠digitalspace.com

Dear CC folk, The DigiBarn received this note from someone who is trying to handle the proper dispensation of a ton of IMSAI stuff located in Albuquerque NM (not Ohio). Read on below and feel free to get directly in touch with him... ### I am in the process of clearing the estate of Gary W. Harris who opened the first computer store in Columbus, OH in about 1975. He was an IMSAI dealer. I have IMSAI equipment, including an 8080, many S-100 boards, and manuals for boards and for IMSAI equipment. Still going through stuff. There is so much stuff, and I don't want to go the EBay route with all the posting, packaging and sending. Can you advise on the disposal of this material in a way that will be to the mutual advantage of the recipient and Gary's estate. Contact: davharr at q.com ###

11 years, 7 months

Tracometer and BAC levels (was: Re: mystry cards make offer or they going in trash :()

by Arno_1983＠gmx.de

On Nov 11, 2012, at 1:25 AM, mc68010 wrote: >> The testing on that device appear to have be brutal unless I am >> reading wrong. They made the subject test it at 1.2% BAC. I wonder >> how many died. Wouldn't they all ? >> >> http://pro.sagepub.com/content/31/7/751 > (...) isn't > greater than .50% generally at high risk for alcohol poisoning? > > - Dave Yes, .5% is considered "usually lethal" and probably even attainable only for the most extremely alcohol-tolerant persons (anybody else is bound to either have to go puke or pass out long before that) and/or by means of specialized consumption techniques (co-consumption of mar-jah-wana is said to suppress puking). > Um, yeah. At first I thought it was a typo, but they have similar > concentrations elsewhere and give the correct mg/L, so... Nope, it *is* methinks a typo. They're mixing up percents (%) (which is the usual parameter given for ABV in alcoholic beverages) and promille (o/oo) which is the usual unit of measurement for BAC, at least in Germany. 1 Percent is "one part of a hundred" whereas 1 Promille is "one part of a thousand", so 10 Promille make 1 Percent. The given mg/l concentration supports that (they're simplifying insofar that they calculate with a density of 1 g/ml for the blood sample), as 1200 mg/l or 1.2g/l or(about) 1.2g / 1000g is 1.2 *thousandth* (=Promille) or 0.12 % BAC (and not 1.2 % as given in the text), which makes a lot more sense for the average intoxicated person. Just my 2 o/oo... Yours sincerely, Arno Kletzander

11 years, 7 months

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test-drb November 2012