- cctalk - classiccmp.org

by D. Resor

Seems this eBay seller let the magic smoke get out, then proceeded to power it on again one hour later. Litton Monroe OC 8820 https://www.ebay.com/itm/355793400092 See the description.. Don Resor

1 year, 5 months

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Re: Vintage computing in the San Francisco bay area

by Anders Sandahl

Hi! It's many interesting things here. I hope I can pass by Anchor Electronics. When I was looking on the map where to find it I noticed that Intel (and it's museum) is just a few blocks away. I think I'll miss Electronics flea market, I have read abut this in another context as well. It would have been great fun! We will miss the observatory's free views. Well, I have to stay longer the next time. /Anders On 2024-06-14 19:32, Curious Marc wrote: > If you happen to be there on the right Sunday, don’t miss the > electronics flea market! > Electronics Flea Market <https://www.electronicsfleamarket.com/> > electronicsfleamarket.com <https://www.electronicsfleamarket.com/> > favicon.ico <https://www.electronicsfleamarket.com/> > > <https://www.electronicsfleamarket.com/> > Also if you need old ICs and transistors at 1960’s prices, that odd > connector or the big old Sprague capacitor there is Anchor Electronics: > Anchor Electronics <https://anchor-electronics.com/> > anchor-electronics.com <https://anchor-electronics.com/> > favicon.ico <https://anchor-electronics.com/> > > <https://anchor-electronics.com/> > > You could view a lot, bid on it and pick it up at Auction BDI > Hibid <https://auctionbdi.hibid.com/> > auctionbdi.hibid.com <https://auctionbdi.hibid.com/> > <https://auctionbdi.hibid.com/> > > <https://auctionbdi.hibid.com/> > > Also take advantage of the clear California skies with telescope > viewing nights at the Foothill Observatory or at the Chabot Museum, > or, even better, at the Lick observatory > Foothill College Observatory - Foothill College > <https://foothill.edu/astronomy/observatory.html> > foothill.edu <https://foothill.edu/astronomy/observatory.html> > favicon.ico <https://foothill.edu/astronomy/observatory.html> > > <https://foothill.edu/astronomy/observatory.html> > https://chabotspace.org/events/free-telescope-viewings/ > lh_domes_wide.jpg > Public Evening Tours > <https://www.lickobservatory.org/events/public-evening-tours/> > lickobservatory.org > <https://www.lickobservatory.org/events/public-evening-tours/> > > <https://www.lickobservatory.org/events/public-evening-tours/> > > Marc > >> On Jun 13, 2024, at 12:15 PM, anders--- via cctalk >> <cctalk(a)classiccmp.org> wrote: >> >> Hi, >> >> Soon I will travel to US and San Francisco/San José Area. Any tips >> for vintage computing and surpuls electronics? >> >> CHM is manatory, I'll go there. It would have been nice to see the >> PDP-1 in action, but I suscpect that we will not make it when it's >> demonstrated. >> >> /Anders

1 year, 5 months

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VCF Southwest June 14-16, 2024 - Dallas, Texas

by Jeffrey Brace

If you’re in the area, come see the show. Great attendance so far this year! More info: vcfsw.org Vintage Computer Federation has a table there too!

1 year, 5 months

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tape duplicator program for pdp11

by Jacob Ritorto

Hi, Just got a real (Cipher M990 on TS05-emulating controller) tape drive running and would like to make exact copies of some [9-track] tapes "to guard against disaster." Probably will also do some imaging, so bonus if the candidate program can handle that too. This is on an 11/34; I don't have a good q-bus tape controller yet or I'd try it on uVAX with NetBSD or something less "exciting" :) Anyone know of good programs to do this with only one tape drive? Don't care which operating system. Been looking through DECUS archives but have found nothing yet (manually reading thru - 1/3 of the way done, maybe there's a better way to scan these?). thx jake

1 year, 5 months

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Seeking Remex RRS3300 Paper Tape Reader info

by David Wise

I was given a Remex RRS3300RB5/550/DRA/S358 back around 1999. This 300cps machine uses a capstan and brake instead of a sprocket. The 180ips spooler is AC motors, triacs, brakes, tension arms loaded with microswitches (including a discrete differentiator), six relays, and a soft-start ramp. In spite of the ramp, the spooler was murderous, snapping tape after tape. After some modifications and adjustments I got it working pretty well, but I don't like that I had to change it. I never found a manual, and it has always bugged me. Does anyone here have anything? I have a manual for the RRS3301 which has a similar reader section but the spooler (my sore spot) is completely different. I have a manual for the RTS3300 S239 which is a custom-mod to fit in GE CNC systems of the time. It has no reader electronics, and a spooler that shows common ancestry but again it's not like mine. Thanks, Dave Wise in Hillsboro Oregon To be specific, I made two changes and found a set of resistor settings that treats the tape gently. The changes are (a) eliminate continuous takeup during the startup ramp, (b) block the transition to full speed. The soft start board simply ramps up to maximum and stays there. I made it easy to back these changes out if I ever find out how to make the instrument behave in stock trim. What is my 358 custom mod?

1 year, 5 months

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Vintage computing in the San Francisco bay area

by anders＠abc80.net

Hi, Soon I will travel to US and San Francisco/San José Area. Any tips for vintage computing and surpuls electronics? CHM is manatory, I'll go there. It would have been nice to see the PDP-1 in action, but I suscpect that we will not make it when it's demonstrated. /Anders

1 year, 5 months

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VCF West Aug 2 & 3, 2024 - Mountain View, CA

by Jeffrey Brace

Hello folks, We're less than a month away from shutting down exhibit and speaker registrations for VCF West. The July 4th weekend represents the end of both so I can use the rest of July to get the program built, get the floorplan finalized, create schedules, etc. So if you've been waiting to get your exhibit or talk registered, wait no more! We still have room for both, but I can't promise that will last all the way until July! This year's show is already shaping up to be a great one so you don't want to miss it! As always, details are at https://vcfed.org/events/vintage-computer-festival-west/ Attendee ticketing information and pre-orders will be posted soon. If you have any questions, comments, concerns or -especially- if you would like to volunteer to help with the show, please let me know at this email address. Thank you! Erik Klein VCF West Showrunner

1 year, 5 months

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teletype roll as an RF termination load

by Fritz Mueller

So, I recently salvaged a pair of ASR 33s and a PDP-8/I from a research lab where I work. A few folks chimed in on the "anybody want this" thread, but I happened to be the lucky winner (not lucky for my back or my basement, but they will be fun restoration projects.) One of the engineers here asked if there were any teletype rolls along with these and if so that they be salvaged because "...it is broadly lossy to rf and can be used as an rf termination load." When asked a little further if this was teletype rolls in particular, she replied yes, and that this was something she had picked up in former work as an RF engineer at Varian, from a previous generation of crafty engineers. I thought this was pretty interesting, and that the list here might have a cross-section of folks who might comment. Anybody heard of this before? Hmmm, teletypes *and* RF -- sounds like something Marc might want to check out... :-) cheers, --FritzM.

1 year, 5 months

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Re: Illiac II Library Routine

by Marvin Johnston

First, the date of the report is January 13, 1967. I don't plan of offering the report for sale. Once I find a good way of duplicating the report, I most likely will put the copies on a thumb driver and offer them for sale most likely for the price of the thumb drive (1 or 2 dollars.) If bitsavers wants copies, that would be great since it (they) will be available at no charge. Thanks for asking! Marvin > From: Bill Degnan<billdegnan(a)gmail.com> > Subject: [cctalk] Re: Illiac II Library Routine > > > Marvin > Are these for sale or are you bringing to exhibit? What year was the Iliac > II library routine published? I will be at VCFMW this year. > Bill > > On Tue, Jun 11, 2024, 11:26 AM Marvin Johnston via cctalk < > cctalk(a)classiccmp.org> wrote: > >> Thanks for the offer,but I'm located in Santa Barbara, CA. My plans >> include VCFMW in September where I can bring a slew of his books, etc. >> I might add there are some IBM manuals including the 360 and 1401 >> Fortran II I've seen so far. >> >> Marvin >> >>

1 year, 5 months

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Dilog Multifunction MQ-100 board

by Douglas Taylor

Hopefully I can find someone who has a manual for this qbus board, if not, does anyone have experience with this board? Summary: It's a dual width qbus board with 1 DLV11-J port, 32KW Boot room, on board LTC circuit and has a 16 pin connector to attach to a front panel. I dumped the prom's and you can see them over on the VCF Forum/DEC page. I used PDP11GUI to probe the I/O space and it looks similar to a MXV11-B boot board, with the addition of a serial port, LTC and front panel control. The board has copyright 1986 so it's not that old. I guess a front panel would have; LED for RUN, LED for DC OK, a switch for HALT, switch for RESTART and possibly a switch to disable LTC. The board has a couple of 4N25 optocouplers and what signals would need isolation? Yes, I would like to use this put together a working qbus PDP11 using either 11/23 or 11/73 CPU, just for fun. Doug

1 year, 5 months

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