test-drb September 2014

test-drb@ccmp.vtda.org

188 participants
251 discussions

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Pdp11/34 -15V power supply

by roeapeterson＠gmail.com

Does anyone know offhand what the -15 volt power supply was used for in a BA11-K pdp11/34 enclosure? Thanks.

10 years, 3 months

11/84 boardset (was: equipment available)

by mtapley＠swri.edu

Jay, On Sep 24, 2014, at 12:00 PM, cctech-request at classiccmp.org wrote: > The 11/84 board set has been claimed. I replied in PM, may have got spam filtered, no response yet. Interested in AlphaServer 2100 memory boards, if available. Others, please pardon. - Mark

10 years, 3 months

Looking for a video card for a Sparc Station 5.

by aperry＠snowmoose.com

William Barnett-Lewis <wlewisiii at gmail.com> wrote: > > I'm looking for an S-Bus CG6 of the TGX or TGX+ versions or a Sparc > Station 5 specific S24 24 bit video card. The TGX cards are supposed > to be able to push a resolution of 1024x768x60 that should be able to > be used by generic SVGA monitors. > There is a CG6 TGX on eBay with a $20 Buy-It-Now price (and free shipping). http://www.ebay.com/itm/Sun-501-2325-SBus-TurboGX-8-Bit-Color-Frame-Buffer-… I have a collection of SPARCstation lunchbox systems (IPC, IPX, Classic, LX) and an Axil 320 (a SS20 clone), all connected to 5-year-old LCDs. Not all generic SVGA monitors like to connect to Sun frame buffers. I have a ViewSonic that doesn't work with them, but have had no problems with various Samsungs. alan

10 years, 3 months

Sun Ultra E6K Question

by alexmcwhirter＠mojovapes.net

I'll be picking up an E6K from a local university next weekend. I'm not sure exactly what hardware it has installed, but i know it has at least 10 cpu boards. I was wondering if these machines had the same ability of the E10K to segregate the CPU's into multiple systems in order to run multiple operating system instances independently?

10 years, 3 months

Inventory of remaining IBM S/360 CPU's.

by Arno_1983＠gmx.de

Christian Corti <cc at informatik.uni-stuttgart.de> wrote: > > We have a 4331, too. Perhaps you already know our site/machine. Nope, I just found out about your machine when I saw it on Henk's list. > What do you mean with "start up the main processor"? Doing an IPL? Hmm...I don't remember the specifics after all those years, but basically: when you switched on the machine, the fans and some minor power transformer/PSU would power up, the Service Processor would boot from an old squeaky 8" floppy drive and issue some progress indications on the terminal. At one point, you could hit a key (combination?) to get into some kind of setup menu, where you could e.g. enter what sort of device was connected to each terminal port. You could stay there and browse that menu to your heart's content, but if you did not enter or did quit the menu, the SP would try to power on the main part of the machine - you heard a clunk from some large contactor, the buzz of the main transformer(s) would kick in for like 1-2 seconds, then everything (including the SP supply) would be shut down (several more clunks, fans spinning down), leaving the machine powered off again - without an error indication on the terminal. > > One related machine I know of (a 4361) is kept at IBM's Museum in > > Sindelfingen; we were there to get the pinout of the System Panel > > They also have a 4331 AFAIK. At least they took the 3370 drives that were > part of the machine we got some years ago. We kept the 3340 and 3344 > drives. Perhaps they didn't have it back then, or it was in storage and we were only shown the 4361 because that was on exhibition. I don't however remember anybody telling us about a 4331 there. > > machine (manuals, schematics and faultfinding charts) but don't really > > know where to start with our Problem. > > MAP - Maintenance Analysis Procedures. Yep, that's what they were called :) jwsmobile <jws at jwsss.com> wrote: > I would rely on the MLM's and other service documentation. They have > pretty good procedures of testing to follow and solution matrices to > follow to remedy the problems. If you are following those and have > encountered a problem, then you should have something that can be helped > with. I've brought up a few systems and you have to go thru the tedious > process of running all the tests sometimes to find something, but things > I have had wrong fell out of tests where I would not have thought to look. Of course we tried following those procedures, but there were several entry points and maybe we just always missed the right one. Somehow the path always went off into the woodwork, with things like preconditions that were not met in our case. Christian Corti <cc at informatik.uni-stuttgart.de> wrote: > You haven't asked so far, did you ? (I don't remember) Probably not since you joined the list. Keep in mind that of this was more than ten years ago and I had not pursued those issues much, as the system is not in my custody, I only get to chat with its current owner a couple times a year at most, and we both have had other fish to fry through all those years. But after all, I still yearn to bring that project to some rewarding conclusion :) > What drives and OS tapes do you have? No (intact or restorable) drives except for the two internal 8" floppy drives, no software except for two IML (bad original that had been stored inside the drive, intact backup) and I think one diagnostic floppy that came with the system. What's there is a 3262 high speed printer and some sort of remote terminal server that came from a large mail-order outfit (Quelle Versandhaus F?rth). I'm all for sourcing period peripherals if possible at all, but if we can't, our alternate idea is to furnish some sort of channel drive emulator with a modern hard drive, like Mr. Zabolitzky and his guys at Cray-Cyber.org did for their CDC machines. > The 4361 is great because it has the storage director integrated in, and > you can run a complete system with just a terminal, a tape drive such as > the 4311 which has the tape controller and drive integrated together, > and disk drives. > > It is a great VM personal system if you have one. A friend had one to > himself for 2 years at UMSL at one time. Sad these all got broken up > for the price they brought. I shall see whether I can get together with the owner at some time again and get some diagnosis and work done on the machine. However I don't have any idea whether that is even possible in the place where the machine is currently stored. Of course I'm all ears for more suggestions and anecdotes about these machines and leads towards associated stuff. So long, Arno

10 years, 3 months

FS: Wyse WY150 Terminal and Sun Multipack 12 drive Array- Fully populated w/ 12x

by slandon110＠gmail.com

Hey guys clearing out some stuff since I got some new goodies at VCF A nice Wyse WY150 terminal with nice clean keyboard- Works Great $50 plus shipping A Sun Multipack 12 Drive Array with 12x18GB Drives- This thing is heavy 40lbs. So first 50 bucks gets it plus shipping.

10 years, 3 months

WTB: Dec alphastation 4100 memory/video

by tpresence＠hotmail.com

If anyone happens to have alphastation 4100 memory/video cards for sale, please let me know. I will need them to ship to Colorado, USA. Kevin

10 years, 3 months

Is plastic National Semiconductor (NS) TTL chips worse than others?

by mattislind＠gmail.com

After the successful restore of the HP9830B I continued with the HP9810A that I was able to get from the Swedish Maritime Administration. ( http://www.datormuseum.se/computers/hewlett-packard/hp9810a ) The machine has been sitting in a storage container for many years until I was able to rescue it. And of course it was dead. Testing the CPU boards in the working 9830 gave that three out of four boards were faulty. This far I have replaced four TTL chips. Three on the clock board and one on the ALU board and all of them are made by National Semiconductor, date codes are mid 1972. All are plastic DIP. The failure mode seems to be that the outputs are floating. I guess that the bonding wires are broken. Can it be that the moisture in the storage container that has made it into the chips corroding the wires? What is the experience when it comes to different manufacturer and plastic DIP TTL? Which are better, which are worse after 40 years?

10 years, 3 months

Mac 512k for sale

by tlindner＠macmess.org

Includes: Mac External Floppy drive Keyboard Second keyboard, with some not working keys Numeric Keypad Mouse Photograph of Mac for sale: http://www.macmess.org/images/coco/Mac-Hero.jpg Located: California, Bay Area, 94520 (All offers should include a description of how you want the machine packed, plus your carrier choice) -- tim lindner

10 years, 3 months

11/84 boardset (was: equipment available)

by jwest＠classiccmp.org

The 11/84 board set has been claimed. J

10 years, 3 months

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test-drb September 2014