test-drb

test-drb@ccmp.vtda.org

101090 discussions

by elaine＠ferranti.us

Hello: We have an old network system on an IBM AT and need to retrieve some information from it. We are having problems that would indicate a CMOS battery failure. Do you have batteries for this model #AA13240? The part number for the battery (#8286121) was on the power supply. Since I don't see an obvious battery in sight, could the battery be located inside the power supply? Do you have schematics for this particular system? You can e-mail me at this address. I job share with Elaine. Thanks for your help. Millie Shenton Ferranti International, Inc. Lancaster, PA 16504-3025 (717) 285-7151 (717) 285-7058 FAX

23 years, 10 months

I hate Radio Shack

by Lee.Davison＠merlincommunications.com

> I would think of more like 400V for a 3/4" arc. > It's about 60v once an arc is established and is almost independant of arc length (10v at each contact and 40v across the plasma) > Is it that the high wattage was ionising the > copper or otherwise altering makeup of the air gap? > It's the air being ionised. Lee. ---------------------------------------------------------------------------- ---- This email is intended only for the above named addressee(s). The information contained in this email may contain information which is confidential. The views expressed in this email are personal to the sender and do not in any way reflect the views of the company. If you have received this email and you are not a named addressee please delete it from your system and contact Merlin Communications International IT Department on +44 20 7344 5888. ________________________________________________________________________ This e-mail has been scanned for all viruses by Star Internet. The service is powered by MessageLabs. For more information on a proactive anti-virus service working around the clock, around the globe, visit: http://www.star.net.uk ________________________________________________________________________

23 years, 10 months

HSC Stuff Possibly Available in MI

by dittman＠dittman.net

If you are in the Grand Rapids, Michigan area and would be interested in some HSCxx controllers, disks, and TA91 tape drives, please email me privately. The requirements are that you pick them up at the company, take *ALL* the equipment (you'll need something a bit larger than a pickup truck), and sign a waiver of responsibility. You'll also need to pick the equipment up by the end of June (although I may get a week or two extension on that). There may be a minimal $1 charge for the equipment to get it off the books. I haven't finalized the deal, so it may fall through, but more than likely it will go through as the only alternative is for the company to pay for disposal. I made a deal with them that I'd broker the deal so they wouldn't have to deal with arranging everything themselves. Again, email me privately. I'll make the arrangements between you and the company. BTW, I don't work for the company with the equipment. -- Eric Dittman dittman(a)dittman.net Check out the DEC Enthusiasts Club at http://www.dittman.net/

23 years, 10 months

I hate Radio Shack

by DAW＠yalepress3.unipress.yale.edu

> From: David Woyciesjes > > > From: ard(a)p850ug1.demon.co.uk > > > > ... > > > > I certainly wouldn't use a 3A AC swtich for a starter solenoid operating > > > button. It's way underrated. > > > > -tony > > > Umm. what about just going to your local race car/performance auto > shop(or website), and buy a real starter button for your truck? > > e.g. for only $8.55US... > http://www.driverfx.com/products/productDetails.jsp?PRODUCT%3C%3Eprd_id=17 > 88 > 187&FOLDER%3C%3Efolder_id=1620351&affID=2958&bmUID=1023977805203 > > -- > Okay, that website sucks. No picture. Google for "starter button" turned up this one... http://homepage.ntlworld.com/roybooth/willfly/starter_switch.html -- --- David A Woyciesjes --- C & IS Support Specialist --- Yale University Press --- (203) 432-0953 --- ICQ # - 905818 Mac OS X 10.1 - Darwin Kernel Version 5 Running since 01/22/2002 without a crash

23 years, 10 months

I hate Radio Shack

by DAW＠yalepress3.unipress.yale.edu

> From: ard(a)p850ug1.demon.co.uk > > > The guy there is accustomed to seeing me come in for DE9 connectors, > > hoods, & computer stuff, and always asks "What are you building this > > time?" He doesn't know anything, but at least he's curious... I found > > a push-button rated at 3A, 125VAC, and brought it up. Darrell says > > "Building one from scratch now, are ya?" I told him no, it's a starter > > switch for my pickup. He refused to sell it to me, because "Those > > starters pull 20 or 30 amps, and that's *DC*, too! That switch will > > Hmm... In every UK car I have worked on, the starter motor itself draws > about 600A on-load from the battery. This current is switched by the > starter solenoid contacts which acts (in part -- it also moves the > pinion into mesh with the flywheel) as a large relay. > ... > > Now, admittedly the former should only operate until the solenoid has > pulled in, But if there are problems (a typical one is a relatively high > high resistance connection in the circuit which limits the current to > (say) 10A -- the solenoid will then not pull in and disconnect the first > winding), then the current through the switch will be a lot higher than > you might expect. > > I certainly wouldn't use a 3A AC swtich for a starter solenoid operating > button. It's way underrated. > > -tony > Umm. what about just going to your local race car/performance auto shop(or website), and buy a real starter button for your truck? e.g. for only $8.55US... http://www.driverfx.com/products/productDetails.jsp?PRODUCT%3C%3Eprd_id=1788 187&FOLDER%3C%3Efolder_id=1620351&affID=2958&bmUID=1023977805203 -- --- David A Woyciesjes --- C & IS Support Specialist --- Yale University Press --- (203) 432-0953 --- ICQ # - 905818 Mac OS X 10.1 - Darwin Kernel Version 5 Running since 01/22/2002 without a crash

23 years, 10 months

88000 machines

by csmith＠amdocs.com

> -----Original Message----- > From: Pat Finnegan [mailto:pat@purdueriots.com] > The 88000 I have is in a NCD 88k X-Windows Terminal. The Well, chiming in for myself here, I have one 88k based system. It's a Data General Aviion workstation. Eventually I'll get the SIMM socket repaired, get some SCSI cables (with large 50-pin D shaped plugs) for it and get it running. Chris Christopher Smith, Perl Developer Amdocs - Champaign, IL "Confutatis maledictus, flammis acribus addictus, voca me cum benedictis. Oro supplex et acclinis, cor contritunt quasi cinis, gere curarn mei finis." -Requiem

23 years, 10 months

Help needed with PSU for DEC "Leprechaun" box

by erd_6502＠yahoo.com

I have these two external drive cases, once called "Leprechaun boxes"; one held an external RD52 and one held an external TK50 - same enclosure, same PSU, different cable transition header at the back. The problem is that every one of these that I've ever seen has had the PSU die. One of these was repaired by my order (with company funds!) about 15 years ago by ESS. I don't fancy a professional replacement at this stage. I do not have schematics. I do not not understand switching PSUs well enough to do more than take stabs. I know they involve high voltage, high-frequency oscillations, but that doesn't help me fix them. :-( Is anyone on the list familiar with these enough to suggest common failure modes? If the case were a wee bit taller and wider, I'd consider putting a commodity PSU in the cage. Don't think there's room for one in there, though. Not desktop sized, anyway. Anyone have ratings for the Leprechaun box? Looks like .45A @ 125V from the back, which tells me that it's not a strong PSU (~60W max draw, so probably no more than 40-50W pull, I'd guess). I wish I'd bought more of these $5 tiny cases at Dayton a couple of years ago - the PSUs will fit into your palm and provide at least that much current (enough to drive a small PeeCee motherboard and a 3.5" drive). Thanks for any assistance. -ethan __________________________________________________ Do You Yahoo!? Yahoo! - Official partner of 2002 FIFA World Cup http://fifaworldcup.yahoo.com

23 years, 10 months

No IMSAI on ebay

by wh.sudbrink＠verizon.net

I run a set of searches on ebay just about daily. One of the searches is for IMSAI. This morning, for the first time in about two years, a search for IMSAI resulted in no hits. I found this interesting. Thought others might as well.

23 years, 10 months

88000 machines

by dwightk.elvey＠amd.com

Hi I have a machine with a Z8000 that is working. It is the Olivetti M20. You should be able to find these in Europe. They were many sold in Italy and Germany. It uses a OS made by Olivetti called PCOS. There are a few 32032's around. I also have a couple of the National modules ( I think they were called RA2000 ) that have the NSC800 processor in them ( similar to the Z80 ). These were designed to stack and have a Forth built in. There was a module made by Fairchild that has a RISC processor on it that I have someplace as well. I'm not sure if this one ever made it to production. I think I even have some manuals for it as well. Not many of the 432's made it out of Intel. I'm not surprised that these are rare. There was also a Z80000 someplace as I recall. I guess there are a lot of holes in your collection :-( Dwight On Wed, 12 Jun 2002, John Honniball wrote: > > All this mention of Motorola's 88000 RISC chip has made me wonder > what machines were built around it. Did Data General make anything > with it? Was there a Motorola development system? > > One of my collecting goals is to acquire an example of each of > the microprocessor acrhitectures. Now 6502, 8080, 6809, 68000, > and so on are easy. What about the Z8000? The 32032 (I do have > a Whitechapel)? The 88000? The iAPX432? > > -- > John Honniball > coredump(a)gifford.co.uk >

23 years, 10 months

I hate Radio Shack

by dwightk.elvey＠amd.com

>From: ard(a)p850ug1.demon.co.uk >> > >> > Just a sanity check, here. What would be the _DC_ rating of a >> > momentary switch rated at 3A, 125VAC? >> > >> > Doc >> >> About 175 volts. Most 1 farad caps are rated at 5.5 volts. > >Never!. A DC arc is much harder to extinguish than an AC arc (the >simplistic explanation is that the AC voltage drops to 0 twice per cycle, >thus helping to extinguish the arc). The DC rating of a mechanical switch >is not sqrt(2) times the AC rating. > >It's a lot less. I would not want to use that swtich _for resistive >loads_ at more than about 24 volts. For significantly inductive loads it >would be even less than that. > >When I was at university there was a physics experiment involving a large >solenoid coil powered from a 24V 10A (or so) bench PSU. The switch was >one of those old knife swtiches, which could therefor be operated slowly >(no spring mechanism). I found I could easily generate and maintain >copper arcs of about 3/4" between the switch contacts (No, that wasn't >the point of the experiment, but it was fun...). Admittedly a quick >break switch would make it harder, but then again the average small >switch has pretty small contact gaps when open. > >-tony > > Hi This is why there is a condenser on the points of a car. This allows the points to open before the coil has a chance to build up too much voltage on the primary. The size of the capacitor is a compromise between getting the points open and too much current when the points close. Many older car manuals would tell you to look at the points to determine when the capacitor was too large or too small by the amount of material transfered from contact to contact by the arcing. For those that haven't tested this by hand, the primary will kick up to about 400-600 volts because of flyback. It will make you jump a little. Dwight

23 years, 10 months

A good day at Goodwill

by univac2＠earthlink.net

A _very_ good day, actually. For $40 I picked up: Apple IIe in pretty bad shape, but with DuoDisk & interface card, SuperSerial card, and paddles. ROM3 Apple IIgs with SCSI card. TI-99 Expansion interface with 2 drives, RS-232 interface, and third-party 128K memory module, plus TI Extended BASIC, MultiPlan, Editor/Assembler, Disk Manager II, and more. And the TI stuff was in an old Apple box, for either a II+, IIe, or IIc, I think. All it says besides "Apple" is: "The Personal Computer" in an 80s-purple-neon mall-shop-sign style script typeface. Plus an Apple external 800K drive, some software, and a few other assorted goodies. It helped that the extremely nice man at Goodwill let me in the "restricted" area of his new shop in the GW building. Nobody else gets to go back there, so nothing had been picked through. -- Owen Robertson

23 years, 10 months

Let's Have an Opus Thread!

by doc＠mdrconsult.com

Seriously. Somebody mentioned last week that they had questions about an Opus card, I just saw one, a 300PM, on Dan Veeneman's page, and I have the software (2 DC6150 QIC tapes) for a 400PM. These appear to be for Solaris, or SunOS, and I read that Opus built "mainframe coprocessors" for Suns as well as ATs. I think they also built standalone workstations. Does anybody have a matched set? Software and hardware? Ever seen the mainframe coprocessors in action? These things are really intriguing to me, and really mysterious. If anybody has an SBus 400PM card and needs the software, or wants to donate/trade it, I'm willing either way. If somebody wants to forward this to CCtech, that'd be cool too. Doc

23 years, 10 months

Need manuals (bounty request $$$)

by foo＠siconic.com

I am searching for the following manuals: PCP-88, K. Stapleford (Foxboro publication) A Summary Description of the Standard DDC Functions, R. Rankin (Foxboro publication) GE/PAC 4000 Free-Time System User's manual GE/PAC 4000 Monitor User's manual If you've got any of these, please contact me at <sellam(a)vintage.org>. 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 *

23 years, 10 months

Need manuals (bounty request $$$)

by vcf＠siconic.com

I am searching for the following manuals: PCP-88, K. Stapleford (Foxboro publication) A Summary Description of the Standard DDC Functions, R. Rankin (Foxboro publication) GE/PAC 4000 Free-Time System User's manual GE/PAC 4000 Monitor User's manual If you've got any of these, please contact me at <sellam(a)vintage.org>. 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 *

23 years, 10 months

Omnidata HHC

by pat＠purdueriots.com

I got an Omnidata Polycorder PC-602 'handheld computer' today. Does anyone know anything about these things? Mine still seems to function, and the recharable batteries even hold a charge. It's from about 1985, and is programmable, and even includes some sort of terminal software (although I don't want to rely on a 4x16 char screen for my day-to-day things). Thanks. -- Pat

23 years, 10 months

Let's Have an Opus Thread!

by ken＠seefried.com

AFAIK...Opus had, at least, 32032, SPARC32, Clipper & 88000. They ran GNX, SunOS & CLIX, respectively, on the first 3; dunno what Unix ran on 88k. I *think* they also had 32016, 68020 & 32332. I've got an 88k-based card, sans software. Ken

23 years, 10 months

Let's Have an Opus Thread!

by xds_sigma7＠hotmail.com

The surplus place I go to at least used to have an ISA opus sparc thingy.. I hope its still there... Will J _________________________________________________________________ MSN Photos is the easiest way to share and print your photos: http://photos.msn.com/support/worldwide.aspx

23 years, 10 months

A good day at Goodwill

by xds_sigma7＠hotmail.com

Dunno if its still there, but there at least used to be one with floppy included at the scrapyard... also an osborne 1 with the screen busted.. Will J _________________________________________________________________ Chat with friends online, try MSN Messenger: http://messenger.msn.com

23 years, 10 months

[CCTECH] AT&T PC7300 / UnixPC is ill! :(

by csmith＠amdocs.com

> -----Original Message----- > From: Andy Berg [mailto:groovelists@yahoo.com] > Today, I acquired a PC7300. Alas, the poor fellow > seems to have a rather large malady of some type. I've It will make you feel better to know that they're very sturdy. > Evidently, before one of these machines first boots > up, it displays a few rectangular characters in the > upper left hand corner of the screen. It then proceeds > to its boot screen. (And then OS loading and whatnot Yes. The rectangles come from ROM, the boot screen comes >from the on-disk loader. (I think) It's really trying to boot, from the sound of it. Put a diagnostic disk in the floppy drive and see what happens. If you've got not diagnostic disk, that's your first problem ;) > if all is well.) My machine just sits there and > displays rectangle after rectangle after rectangle. No > boot screen ever appears. The machine was working when > put away for storage when put away a few months ago, > but refused to boot when it came out. I guess that > leaves it at the point that I got it. :) Chances are that it's the disk. You'll find that it's a normal ST-506 (Is it 506? -- "MFM") disk. If you find that the disk really is toasted, you can get pretty much any half-height drive and replace it. They came with Miniscribe lots of the time. I've replaced them with Seagate and Rodime drives without trouble. Anything else is also likely to work. > I managed, with a bit of yanking about, to get it > disassembled, down to the motherboard, as per the 3b1 > FAQ. I got some of the big dust out and reseated all > of the seatable chips. There didn't seem to be any > major damage anywhere... one of the fans had a cut > line which I repaired, but there was no evidence of > any type of overheating. Most socketed chips were Careful there. There was a procedure somewhere describing how to disconnect the thermister from the fans, in order to _keep_ the system from overheating ;) Make sure that line was one of the lines that powers the fan. Of course, my system, and my fiancee's system, are both fine without having had that done. > reseated, everything was powered on once again, and > the same thing seems to happen. :( The rectangles > appear, the floppy drive sits and spins, and the hard > drive spins up and sits there. There is a loud > beep/click type sound, which I'd figured to be the > heads unparking themselves. When the hard drive cable > is removed, the machine freezes at one rectangle, so > was thinking it could be something along those lines. As I was saying, it could just be a bad disk. > think I can report are that the four indicator LEDs > are at a constant on state - could also be normal for > this part of the boot cycle for this machine, too. I think so, but my memory is fuzzy. Chris Christopher Smith, Perl Developer Amdocs - Champaign, IL "Confutatis maledictus, flammis acribus addictus, voca me cum benedictis. Oro supplex et acclinis, cor contritunt quasi cinis, gere curarn mei finis." -Requiem

23 years, 10 months

RA82 belt tension adjustment, how?

by m_thompson＠ids.net

I was told that this error might be a problem with the starting capacitor. RCS/RI has two RA81s with the same behavior. I bought replacement capacitors and will try them Saturday. Michael Thompson E-Mail: M_Thompson(a)IDS.net

23 years, 10 months

Fw: Free or Best Offer: VAX and RS/6000 hardware

by rschaefe＠gcfn.org

Just came across this... replys to the original author, please. Bob ----- Original Message ----- From: "Charles Sandmann" <sandmann(a)clio.rice.edu> Newsgroups: comp.sys.dec,comp.os.vms,misc.forsale.computers.workstation Sent: Tuesday, June 11, 2002 04:59 PM Subject: Free or Best Offer: VAX and RS/6000 hardware > Early 90's vintage DEC VAX systems and peripherals, IBM RS/6000 parts. > > http://clio.rice.edu/freehw.txt > > Other items lying around my office since I created the list may also be > available (hard disks, Alpha systems with dead power supplies, etc). > > Pickup in far west Houston, Texas, USA. I would prefer to support > VMS hobby usage, but anyone who shows up to take the big stuff gets it. > > I don't have time to package or ship anything, but if you are really > desperate for something I might be able to find someone for you to > negotiate with.

23 years, 10 months

[CCTECH] Morrow Designs CP/M computer parts to good home

by msspcva＠yahoo.com

All: I have the remnants of a "Morrow" computer, from what I've seen on the net it was a CP/M machine (Z80A processor). All that's left is a main board and the case. The case has no model number information, just "Morrow Designs" and the serial number, plus a label on the inside with a PCB number and numbers for the now-missing drives and power supply. The main board has 2, possibly 3 Z80A micros, PROMs, etc. A label on one chip which may be a Z80A has "4/5/84" written on it. If you want it, all I ask is shipping (it's light, so probably no more than $5 in the US). If you'd like to throw in $5 more for packing it up and taking it to UPS it would be appreciated. I've kept it around for a long time, and just recently unearthed it to remove some threaded nuts from the serial interfaces for use in another computer. -- Frank ===== = M O N T V A L E S O F T W A R E S E R V I C E S P. C.= Clayton Frank Helvey, President Montvale Software Services, P. C. P.O. Box 840 Blue Ridge, VA 24064-0840 Phone: 540.947.5364 Email: msspcva(a)yahoo.com ============================================================ __________________________________________________ Do You Yahoo!? Yahoo! - Official partner of 2002 FIFA World Cup http://fifaworldcup.yahoo.com _______________________________________________ cctech mailing list cctech(a)classiccmp.org http://www.classiccmp.org/mailman/listinfo/cctech

23 years, 10 months

[CCTECH] Interesting tidbit on 6502

by RCini＠congressfinancial.com

While browsing sites for 6800 information, I came across this quote from <http://wombat.doc.ic.ac.uk/foldoc/foldoc.cgi?Mostec>. which talks about the design goals for the 650x in comparison to the 6800. >The design goal was a low-cost (smaler chip) design, realized by simplifying the decoder stage. There were no instructions with the value xxxxxx11, reducing the 1-of-4 decoder to a single NAND gate. Instructions with the value xxxxxx11 actually executed two instructions in paralell, some of them useful. < Now, I didn't look at an opcode map, but it seems that this is an interesting twist that I've never seen quoted when people discussed the mysterious undocumented 6502 opcodes executing what appeared to be multiple instructions. Any thoughts? Rich ========================== Richard A. Cini, Jr. Congress Financial Corporation 1133 Avenue of the Americas 30th Floor New York, NY 10036 (212) 545-4402 (212) 840-6259 (facsimile) _______________________________________________ cctech mailing list cctech(a)classiccmp.org http://www.classiccmp.org/mailman/listinfo/cctech

23 years, 10 months

[OT] measuring DC wall wart

by mythtech＠mac.com

>heck you can even use a jar of salt water >with 2 electrodes in it at a pinch -- electrolysis is a problem if you >use it for any length of time on DC, but it will act as a power resistor >for long enough to test a PSU) I did that for extra credit once in a theater lighting class. I built a Salt Water dimmer system. Worked real nice for a little while, then the water turned piss yellow, and it stopped conducting at all. But I got the extra points to make up for the classes I missed. I built it using a 9 volt battery, the little square ones used in toys, a baby food jar, metal cut from a can of peaches, and some scrap wood, wires, and light bulb pulled from a toy truck... same truck the battery came from. It was a fun evening project. -chris <http://www.mythtech.net>

23 years, 10 months

Anyone have the pinout for a 9328 (shift register?)

by ard＠p850ug1.demon.co.uk

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23 years, 10 months

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