test-drb February 2003

test-drb@ccmp.vtda.org

337 participants
780 discussions

Probably doesn';t fall under the 20 year rule... Cubix 1010

by geoffr＠zipcon.net

Local scrapper/reseller ahd a Cubix 1010 "fault tolerant' computer system, it is 2 chassis each with 6 P-200 or 233 boards in them....

21 years, 8 months

Question on chip date code

by vcf＠siconic.com

I am looking at a chip that is causing me confusing with regards to its actual date code. The chip is labeled thusly: (logo) /718 DM74157N 9322 (logo) looks something like this: /\/ /\/ ...which probably makes it National Semiconductor. My first instinct is to guess that its date code is 9322. However, it does not fit within the context of the rest of the board, which is 1976. They are definitely not original, as the board calls for a 74257 but the 74157 has been put in its place with the addition of a capacitor across +5 and ground. Is it possible that the date code is actually "/718", and what I am seeing as a slash is actually what remains of a '7' that wasn't printed correctly? -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org * Old computing resources for business and academia at www.VintageTech.com *

21 years, 8 months

ULTRIX ris install

by franco.tassone＠inwind.it

Few days ago gome guys (including me) were wondering how could it be possible to do an Ultrix installation via RIS support. I was able to fulfill this task right now, if someone is interested I can help in this odd work.

21 years, 8 months

Mac Printers (Cambridge, UK)

by julesrichardsonuk＠yahoo.co.uk

OK, I haven't decided what I'm doing yet with the various Apple machines I got the other week, but I know the printers are just getting in the way, so if anyone wants the following just give me a shout: Apple Stylewriter II + manual Apple Colour Stylewriter 2500 - no PSU, needs 13.5V HP Deskwriter 660C + PSU + driver disks (ok this one doesn't hit the ten year mark :) I had the same printer for the PC which failed a while back, and I kept the centronics interface board from it so you're welcome to that too. I may also have the manuals for the PC version still, which might be useful. I've only got the one data cable, currently plugged into the colour stylewriter; I expect it works with all three printers though. I have no idea what of the above works - all the systems that came in the same haul worked fine though so I expect they were just dumped as surplus. Free for collection from Cambridge, UK. cheers Jules Everything you'll ever need on one web page >from News and Sport to Email and Music Charts http://uk.my.yahoo.com

21 years, 8 months

PDP-8 front panel switches needed

by vcf＠siconic.com

Does anyone know of a source for (or have) enough PDP-8 (the original "straight") front panel switches to fill in a front panel? I am working on a replica of the PDP-8 (non-functional) for a museum exhibit, and need to find either a source for switches or some that look close enough. If you have some you wouldn't mind parting with, please contact me with your asking price. If you know of a source, please pass it on. Thanks! -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org * Old computing resources for business and academia at www.VintageTech.com *

21 years, 8 months

new find pdp-11/05

by robinm＠rpi.edu

Hello, Thanks to those pointing out about the various sorts of pdp-11/05 backplanes, and pointing me to the engineering drawing repositories. I had forgotten where that was, though I knew of its existence. I'll keep everyone updated as to our progress in getting this machine alive again. Michael Robinson RPI Electronics Club Vaxherd/PDP-11 Fixer robinm(a)rpi.edu

21 years, 8 months

NeXTStation Color DSP cable pinout

by ian_primus＠yahoo.com

I recently accquired a NeXTStation Color, complete with color monitor and DSP box. Unfortunately, I don't have the cable to go from the NeXTStation to the DSP box, and therefore, I can't use the computer because the keyboard also connects to the DSP box. Does anyone have the pinout for this cable? Also, how does everything connect? I have seen various info on the internet that conflicts. I am assuming by looking at it that the monitor port is just a monitor port, and connects to the monitor through a standard 13W3 cable (came with the computer, but it Sun branded). Then the sound box would connect to the computer through the DB-15 on the back of the computer labelled "DSP" and to the DB-19 port on the sound box. Then the keyboard plugs into the sound box. But >from searching the internet, I have found things such as this http://www.obsoletecomputermuseum.org/nextcolor/monitor_cable.jpg that show a three headed cable that would connect the monitor to the computer, and to the back of the sound box. But then what would the DSP port be used for? And how would the computer get the signals from the keyboard? I'm new to NeXT hardware, so any help would be greatly appreciated. Thanks! Ian Primus ian_primus(a)yahoo.com

21 years, 8 months

VHS Tapes as storage.

by kittstr＠access-4-free.com

Hi, I seem to remember reading in popular electronics, about software that would let you use a vcr to backup your computer. I think it was about 10 years ago. Does anyone remember or know anything about this. My searches on google have turned up nothing. Thanks for any help you can provide! Andrew Strouse

21 years, 8 months

cctech digest, Vol 1 #370 - 5 msgs

by robinm＠rpi.edu

> > Could someone scan the engineering drawings for an H217C stack? > > Go to http://www.spies.com/~aek/pdf/dec or > http://www.maincoon.com/classiccmp one or both will have drawings for > the 11/05. Hmm, we do have the drawings for the 11/05. However, neither of the above sites seem to have drawings of the H217C. > > This is partly for my own edification (I have one such board in my > > machine), and partly because of the fact that this "new" pdp-11/05 has no > > core with it. Its engineering drawings seem to indicate that it wants > > 4 or 8kW of core (one or more of H213-H216), *not* the 16kW of a H217. > > (Granted, by placing two H214s into a chassis we get 16kW, but I > > digress.) > > It will depend upon which backplane you have. If it's an 11/05-S > backplane then it's the same as what I have and you can go to > http://www.shiresoft.com/pdp-11/11-10/index.html to see how to use an > H217C (which is what I have in mine). I'm fairly sure it's not an 11/05-S, though I could obviously be wrong. I don't have the machine in front of me right now. Looking at the machine you have, the form-factor is very different (that, of course is not conclusive). This machine looks like a lower-profile beast, the modules enter from the side of the chassis, which is a pain because you have to take the machine out of the rack to get at them. > > If so, the next question is, can I do this with an H217? (Drop in an > > H217C, and tell the machine that it's really an H214/H215.) This might > > sound like a gratuitous waste of core, which it is, but I happen to have > > another core board (not in my machine) that could be used... So anyway, > > the engineering drawings would answer this question really fast. > > > > It's not so much the drawings but the wirelist for the backplane. You > really need to know which backplane you have. I have that. Again, my question is what does the H217 look like in comparison to the H213-H216 family? Pretty much the only piece of data I need to answer my question is the engineering drawings of the H217... Guy: BTW, the proud owner of this machine is Jesse Kempf, whom I believe you have talked with. He's not on classiccmp, though. Thanks, Michael Robinson RPI Electronics Club Vaxherd/PDP-11 Fixer robinm(a)rpi.edu

21 years, 8 months

4k x 24 core memory box

by aek＠spies.com

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=11713&item=3007514062 FYI.. Seller (of course) has no clue what it is.

21 years, 8 months

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test-drb February 2003