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101090 discussions

by mattislind＠gmail.com

I have what I believe is an unused RA60 head #4. At least the surface looks very clean. Someone has written "RA60 04" on the side of the box. On the top there is handwritten 70-18661-04. https://i.imgur.com/RNK0FOTl.jpg I could use a RL02 or RL01 head as a trade if someone is interested. /Mattis

7 years, 11 months

Cleaning out again

by jnc＠mercury.lcs.mit.edu

> From: Mark Tapley > I'm interested in one of the DECServers but Bill says it's big > enough to be in the "pick up only" pile. ... drop it at a Pak/n/Ship or > equivalent to get it headed my way. PakMail will go pick stuff up. If several people get together, they could make only one trip to Bill's, which might reduce the cost. Noel

7 years, 11 months

Cleaning out again

by bill.gunshannon＠hotmail.com

Anybody interested in a pair of Tseng Labs ULTRARAM boards? I assume they were expansions for the Tseng Labs Video Cards but, if nothing else, they are loading with 4164's. bill

7 years, 11 months

Heathkit H9 schematics wanted

by harten＠injectstar.de

Hi to all! I'm looking for a good scan of the Heathkit H9 schematics. A set of photos, if the document is to large for scanning, would also work for me. Regards Rolf

7 years, 11 months

IBM 3270 MCA card available

by mattislind＠gmail.com

I have some kind of IBM 3270 MCA board available for the cost of shipping >from Sweden. IBM P/N 26F0191. Have no way of testing it, but it was pulled >from an otherwise working machine. https://i.imgur.com/jBBDrcnl.jpg /Mattis

7 years, 11 months

Rayethon Computer AN/FYK9 CMI Store 33

by justin.keogh＠v6y.net

Anyone know more about this? So far I have only found references to Rayethon Computers in old trade mags. http://v6y.net/IMG_20180912_170812.jpg The rack is as stout as it gets. BTW if anyone wants a nice RXO2 (auction ending in 6 hours), bidding starts at $1: https://www.ebay.com/itm/202440567768 Cheers! -Justin

7 years, 11 months

SPACEWAR! Switch Boxes for a PDP-12

by anders＠abc80.net

> Date: Mon, 24 Sep 2018 12:26:57 -0600 > From: Eric Smith <spacewar at gmail.com> > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk at classiccmp.org> > Subject: Re: SPACEWAR! Switch Boxes for a PDP-12 > Message-ID: > <CAFrGgTS=XdctKw6G_FjddnLc6H=gpgf5JizV9zRXY4C0qhoYyg at mail.gmail.com> > Content-Type: text/plain; charset="UTF-8" > > On Mon, Sep 24, 2018 at 11:23 AM, Robert Feldman via cctalk < > cctalk at classiccmp.org> wrote: > >> >that is what the PDP-1 at CHM has been using for over 10 years >> >> https://na.suzohapp.com/products/pushbuttons/58-9166-L > > > Ken Sumrall built the Spacewar control boxes used at the museum, with some > suggestions from me. We originally intended these to be temporary, and to > build nicer control boxes later. Since they were intended to be used by > restoration team members, and possibly museum guests, we wanted them to be > reliable rather than authentic, and specifically did NOT want these > temporary boxes to themselves become historical artifacts. We chose > inexpensive but robust arcade pushbuttons. They can take a beating, and in > the event that the microswitch does break or wear out, it can easily be > replaced, though the complete button assembly with microswitch is not > expensive. The boxes are particle board. We used DE-9 connectors. On the > PDP-1, hyperspace is invoked by the CW and CCW rotate controls being > activated simultaneously, so the hyperspace button is wired via series > diodes to both rotate buttons. > > After we built them, Steve Russell pointed out to us that although these > boxes don't look like at all like the originals, they actually are > authentic, in the sense that like the originals, these boxes were quickly > knocked together rather than carefully planned, and are functional rather > than pretty. > > We positioned the individual buttons based on the layout used on one of > the > Atari coinop games, "Space Duel" IIRC, on the because Atari had done a > good > job of laying them out to be easy to use. > > I'm not trying to discourage anyone from trying to make replicas of the > original Spacewar control boxes, but aside from some grainy photos and a > brief description, not much detail about them is actually known. > > We do not know what controls were used when PDP-1 Spacewar was > demonstrated > at the Computer Museum in Boston. We don't think they had the original > control boxes. Possibly they might have just used the PDP-1 console > switches, which is quite inconvenient and increases wear on those > switches. When we restored the PDP-1, we discovered that some of the > console switches were flaky, and upon inspection, that they appeared to > have been replaced multiple times, with suboptimal craftsmanship. > I like the ideas with the diodes for hyperspace, I'll steal that right away!

7 years, 11 months

Rayethon Computer AN/FYK9 CMI Store 33

by gerardcjat＠free.fr

@ Chuck, I know you know about the FST1 computer ( 24 bit ). Do you know that there is ( now ?? ) a bit of documentation about it on Bytesavers ?? in .... PDF/Fairchild/Sentry ....

7 years, 11 months

Fall cleaning - 9-track drives available

by bobalan＠sbcglobal.net

I have four 9-track tape drives, and a dirty DEC rack, that I need to get rid of. Two of the drives are HP 7970B's. One has the door unattached. Then there's a Kennedy 9100 800/1600 bpi drive. Very heavy.? As found, none tested by me. Just don't have time to play with them. Last is a CDC drive complete with an AST clone PC with an Overland Data controller and software. This was running a few years ago but has not been used since. Has Media Master format conversion software also. There's also a smallish DEC rack. Could use the top painted but otherwise not too bad. Includes four sets of rack slides. All are located in Santa Cruz, CA and need to be gone soon, I need the room in my hangar. Come get them! Photos here: http://dvq.com/fall_cleaning/ -- Vintage computers and electronics www.dvq.com www.tekmuseum.com www.decmuseum.org

7 years, 11 months

SPACEWAR! Switch Boxes for a PDP-12 (Bob Rosenbloom)

by michael.99.thompson＠gmail.com

> > From: Bob Rosenbloom <bobalan at sbcglobal.net> > Subject: Re: SPACEWAR! Switch Boxes for a PDP-12 > > How about these? They look close, but are still a bit expensive. > > > https://www.ebay.com/itm/VINTAGE-SWITCHCRAFT-60312DL-MOMENTARY-SWITCH/25358… > > Bob > I bought 5x of them. They are the locking style that we don't want, but I think that we can bend the angled part to make them momentary. Thanks for the help! -- Michael Thompson

7 years, 11 months

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