test-drb April 2017

test-drb@ccmp.vtda.org

169 participants
185 discussions

by Richard.Sheppard＠telus.com

> I'm guessing it was a blob of foam, which has deteriorated, but maybe it > was a metal spring, or a piece of u-shaped plastic etc. May depend on the model, but mine has a spring under the plastic reset button in the top of the case and one of those metal domed tactile switches on the PCB. Richard Sheppard

7 years, 1 month

HISTORY OF COMPUTER DESIGN: THE MOST INNOVATIVE AND UNCONVENTIONAL PCS EVER MADE

by lproven＠gmail.com

This series of articles focuses mainly on physical design, of cases and so on, but there are some technical details in the articles too. Note that this is the landing page -- at the bottom of the page are links to other articles in the Inexhibit series, such as the Holborn 9100 and Olivetti Programma 101. https://www.inexhibit.com/specials/history-of-computer-design-the-most-inno… -- Liam Proven ? Profile: https://about.me/liamproven Email: lproven at cix.co.uk ? Google Mail/Talk/Plus: lproven at gmail.com Twitter/Facebook/Flickr: lproven ? Skype/LinkedIn/AIM/Yahoo: liamproven UK: +44 7939-087884 ? ?R/WhatsApp/Telegram/Signal: +420 702 829 053

7 years, 1 month

Cleaning RK05 packs (Was: LGP-30 Memory Drum Update)

by jnc＠mercury.lcs.mit.edu

> From: Klemens Krause > We clean our RK05 disks in a very robust way: with cheap burning spirit > and paper towels. ... We rubbed away thick black traces from occasional > head crashes and we never removed the oxide coating with this torture. I am about to get a large batch of RK05 packs, so I am interested in the details of this. First, what is 'burning spirit'? (I assume this is a straight translation into English of some German term, but not knowing German... :-) After poking around with Google for a while (hampered no little by the fact that it's the name of a band, and also a term in World of Warcraft :-), it seems like it might be acetone? Noel

7 years, 1 month

Got a Sun 2/120, ISO Sun 2/3 monitor, Sun 2 keyboard, Sun 2 mouse

by ian.finder＠gmail.com

Hi folks! I recently acquired a functional Sun 2/120. The framebuffer I have is switchable between TTL and ECL, so I can use either an Sun 2 or Sun 3 monitor, which I am looking for. I am also looking for a keyboard and mouse. If anyone on list has any of these items and would be willing to sell them to me, please contact me. I plan to completely restore the system. Thanks, - Ian -- Ian Finder (206) 395-MIPS ian.finder at gmail.com

7 years, 1 month

Reparando um Vectrex

by alexandre.tabajara＠gmail.com

Oba, post novo no blog! / New post on blog http://tabajara-labs.blogspot.com.br/2017/03/consertando-um-vectrex-com-um-… ---

7 years, 1 month

Test message - what happened NOW to the mail system?

by hachti＠hachti.de

Hi, I just saw that mails from some people now arrive as desired (real sender, reply-to list), but some (e.g. myself) are still mangled with "xxx via cctalk" - did I miss a setting? Confused... Philipp

7 years, 1 month

Intellivision reset switch

by jules.richardson99＠gmail.com

Can anyone who's been inside an Intellivision confirm that there's supposed to be a little foam disc beneath the reset switch plate? I picked a system with a box of cartridges up earlier, half expecting the machine to be dead (I was figuring it was going to be a blob of easily-dead-after-so-many-years custom logic inside, but it's more like a "real computer" in nature). It *was* dead, but the [initial, at least] issue seems to be that the reset switch consists of a metal plate which is supposed to make contact with the PCB when pressed - and presumably is held away from the PCB by something when at rest. Except that there's no "something" in this machine - with the machine the right way up, the plate is free to contact the PCB, holding it in permanent reset. I'm guessing it was a blob of foam, which has deteriorated, but maybe it was a metal spring, or a piece of u-shaped plastic etc. cheers Jules

7 years, 1 month

IBM RT PC card.

by mattislind＠gmail.com

This card is sitting in a IBM RT PC. http://i.imgur.com/Adqnxr3.jpg?1 What kind of card is it? The WD1935 seems to be a SDLC chip. I cannot find any reference to the numbers P/N 6247874 (bottom layer etch) or the number on the sticker on the backside: 6247871G001 It is connected to an IBM marked dongle which has 4 BNC connectors. Is it a 3278-3279 emulation board? /Mattis

7 years, 1 month

New HP42s clone almost available

by COURYHOUSE＠aol.com

Good hear it stood the test of time! As an HP PC dealer in the 80s into early 90s we ha a calculator contract with HP also and... we sold the heck out of them! Is it the only one of the 10 series calcs that stayed in production? I have a set of the special demo versions that were mounted on a descriptive plaque that had been in the PHX HP Corp demo center... when they redid that they knew I Hoarded stuff and sent them over. For some of the 10 series that were still being used we had them on the display floor the others went into the the suites next to the business in the historical display. Ed# In a message dated 4/2/2017 8:50:16 P.M. US Mountain Standard Time, cctalk at classiccmp.org writes: On Sun, 2 Apr 2017, Ed via cctalk wrote: > That is an undertaking indeed! I had not seen this.... Ed# > Someone said the 12c was still being made? The 12c never went out of production. It has been continuously updated. A lot of bankers, insurance people, etc still rely on them. -- David Griffith dave at 661.org A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail?

7 years, 1 month

New HP42s clone almost available

by COURYHOUSE＠aol.com

That is an undertaking indeed! I had not seen this.... Ed# Someone said the 12c was still being made? In a message dated 4/2/2017 9:00:53 A.M. US Mountain Standard Time, cctalk at classiccmp.org writes: A few months ago I had a prototype of this 42S clone in my hands. It looked and felt very promising! I?ll will buy one when it will be available. For those of you who are interested, please follow the discussions on hpmuseum.org <http://hpmuseum.org/> forum. Jurgen > Am 10.03.2017 um 16:34 schrieb David Griffith via cctalk <cctalk at classiccmp.org>: > > > There's a Swiss guy who's made a name for himself by producing working replicas of classic HP calculators. See https://www.swissmicros.com/. I recently discovered his post on Youtube a video showing off an enhanced replica of my favorite HP calculator, the HP42s. This one is called the DM42. Here's the video: https://www.youtube.com/watch?v=0LK7JotR728 > > -- > David Griffith > dave at 661.org > > A: Because it fouls the order in which people normally read text. > Q: Why is top-posting such a bad thing? > A: Top-posting. > Q: What is the most annoying thing in e-mail?

7 years, 1 month

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test-drb April 2017