test-drb

test-drb@ccmp.vtda.org

101090 discussions

by julianskidmore＠yahoo.com

Hi Jos, > > ..the Mac's good, but the flyback Transformer burnt out a while > > back and I was wondering what would be a suitable replacement. > I just discarded a Mac plus analog board, interested ? > You can have it, or just the flyback, for the cost of shipping from > Switzerland. That's very kind of you, if you email me on my own address: mailto:julianskidmore at yahoo.com we'll sort out payment. I don't mind if you ship the whole analog board as I imagine it'll take quite a bit of effort to pull the Flyback off it. Not sure how compatible SE and Plus flybacks are (I don't think the Plusses had 'bleeders'), but it's my best (and only) offer! -cheers from julz @P

17 years, 7 months

Any TI99 Folks out there?

by snhirsch＠gmail.com

I have just added a TI expansion unit to my collection. It came with all the proper internal modules, but there's a possibility that the Disk Management plug-in cartridge (firmware) is missing. If the person I bought it from is unable to find it, is there any workaround to not having this? Does anyone have a spare one to sell? I'm reasonably new to the TI system, so any advice or input would be greatly appreciated! Also needed: The "A" and "B" diskettes that accompanied the Editor/Assembler package. I do have the firmware cartridge and docs for this. Steve --

17 years, 7 months

Datasheet for Intel 1103 DRAM?

by derschjo＠mail.msu.edu

Anyone have a copy of this in digital format? Can't find this on the 'net. Trying to work out what voltages the power supply in the ND-821 is supposed to put out. From testing, it looks like 5v, 18v, and 24v. Knowing what the RAM requires will help nail this down, since it's powered separately from the main logic. Thanks, Josh

17 years, 7 months

Nuclear Data ND-812 info...

by aek＠bitsavers.org

> Anyone know anything else about these things? Nuclear Data was a Chicago company that built various bits of instrumentation for the nuclear industry. I have heard they were the company whose computers were at Three Mile Island, but have no documentation on that. The ND-812 front panel is light/dark green as well. I have one in poor condition. The CPU is wire wrapped. There are PCBs for the core memory system. Bunker-Ramo used them in a point of sale system for supermarkets, mostly in the Chicago area. Parts for them would show up at hamfests in the mid-late 70's there, which was the first time I saw one.

17 years, 7 months

Old parts

by nico＠farumdata.dk

Hi all During a minor clean-up, I found some parts looking for a good home. Available for the cost of the postage from Denmark. The parts come from an mid-80 Acer IBM XT compatible - PC/500 cpu card (8088-2) - PC/500 I/O card with printer, comport, floppy controller - EGA card - LAN card for coax + 15-pin subd I think I also have a harddisc controller somewhere. - 1 backplane All cards are 8 bit ISA. Nico

17 years, 7 months

EISA cfg file needed

by teoz＠neo.rr.com

Looking for an EISA config file !INT3132.CFG if anyone has it. Thanks, TZ

17 years, 7 months

Off-Topic Fluke 4250 info wanted

by g.rosi＠tiscalinet.it

Dear Jonn, i'm an Italian engeneer and I buy some mounth ago a lot of fluke 4250 voltage source. Unfortunately i'm not able to program because i not have the message list....i tried be with no result. Have you any information abaut? If yes, can you post me the list? Thanks in advance. Guido Rosi

17 years, 7 months

Paper tapes+rubber bands+30 yrs = mess

by chrise＠pobox.com

I have a large collection of paper tapes that came with a vintage Altair 680b and Teletype model 33 that I inherited. I've restored the machines and have started looking at the tapes. Unfortunately, I have discovered that the rubber bands that were used to keep the tapes rolled up have all dissolved into a yucky gooey mess that is in most cases, stuck to the tapes. I'm pretty sure the oil on the tapes and 30+ yrs time have done this dirty deed. Sadly, there were original, unopened MITS Altair editor/assembler tapes, BASIC, etc. still sealed in their original packaging but the rubber bands inside have melted all over the tapes. Has anyone dealt with this kind of cleanup before? What are my best options for solvents to get rid of what's left of the rubber without damaging the tapes too much more? What a mess. Parents, talk to your children about rubber bands... Chris -- Chris Elmquist mailto:chrise at pobox.com

17 years, 7 months

ECC on MFM drive

by ra9yer＠yahoo.com

Hello, Could someone help me understand the algorithm used for data integrity check on ST251 MFM drive. I have ST251 drive and an Adaptec controller. Also I have ability to view recorded data in raw format. On the track I see ID field block protected by CCITT CRC16. And the data block protected by some 32-bit ECC. This is definitely not a CRC32. The algorithm in general looks like shift register for polynomial multiplication with polynomial equal to x32+x28+x26+x19+x17+x10+x6+x2+1 . But, this is not just a multiplication. The circuit has some other logic that I did not understand yet. I?ve found very useful document (http://www.national.com/an/AN/ AN-413.pdf) It has a mention about algorithm called ?Glover 140A0443 ? May be this is that I have? Please advice. Thank you. Alexander.

17 years, 7 months

vac tubes / was Re: Schematics of Atanasoff-Berry

by ajp166＠bellatlantic.net

> >Subject: Re: vac tubes / was Re: Schematics of Atanasoff-Berry > From: ard at p850ug1.demon.co.uk (Tony Duell) > Date: Sat, 06 Sep 2008 21:34:08 +0100 (BST) > To: cctalk at classiccmp.org > >> > I really don't understand this modern love with making things as >> > small and light as possile. I'd rather have things that are heavy >> > enough to stay put (in the case of a rack unit, not to topple, or >> > even feel wobbly when units are extended ot the maintenance position) >> > and that are large enough for me to be able to work on them. > >[For the record, I consider the OP's comment that he wants to use a PC >PSU becuase he has one or that it's convenient, or.. to be entirely >reasonable.] > >> >> Bigger and heavier means less items in your collection to fit in the >> space, and a smaller number before the floor falls out from underneath >> of it. I'd hope you could appreciate that. :) > >So by that arguemnt we should all collect handhelds, not desktop and >rack-mounted machines :-) > >> Another problem I seem to have is that the heavier an item is (and >> harder it is to move myself), the less I seem to be able to find people >> to help move it. > >Fortunately I don't mind having to dismantle something to move it. Many >of my larger machines came into the house in small-ish pieces. I >remember, for example, dismantling a DEC RA60 on the back of a friend's >pick-up truck (fortunately the RA60 is dismantled from the top down, so >this wasn't hard), taking the bits inside and then putting them back >together. > >Gettign back to the OP's heater supply, I don't think a mains-input >heater transformer to supply 5 normal-sized receiving valves is going to >make the device impossile to lift. If you used ECC83s (12AX7s), I think >you could use a 20VA transformer with no trouhle at all, and that's >hardly large or heavy. > 12AX7 at 12.6V @.15A (1.8VA) or parallel connected 6.3V @ .3a and I consider that trivial. A transformer sufficient to run 10 of those (18VA) is under 2-3pounds. The average 12V at 1A wall wart can run six of those with a comfortable margin. We are not talking a lot of power yet. If we are in the realm of 100 or 1000 of those then we have some power needs to deal with.. The solution there would be to use instead of one 12.6V transformer that can give 150A we can use ten more readily available transformers of a mere 15A (189VA) which is more manageable anyway. That same transformer (assume 12.6V AC) could using a voltage multiplier easily supply 40-45V where the valves would have a decent usable performance. This is easy as those valves at 40-50V will only need a few milliamps per plate circuit. I know this as I built a 5 tube reciever (6AN8, 6AU6, 6BH6, 6CW4, 6dl6/ECL84) for 80/75M and the whole radio fits in a 7x8 chassis and with the power transformer and audio output transformer is under 6 pounds. The transformer used was salvage but had a 150V 100mA winding and a 6.3V 3A winding (total of 34VA) and that was not even stressed hard and weighed on at under two pounds. Another example is 40 years ago I had a Beckman EPUT (events per unit time) counter that used the then typical tube era 5mhz ring counter decades with neon readout (0-9 with NE2 type neon behind them) (6 ofthem) plus timebase for a whopping 42 tubes mostly of the 12AX7 types and it was big (19" rack width by 11" high) but I distinctly remember it as barely 40 pounds considering it was fully enclosed in a steel case and each decade was in its own case that plugged into a matching socket in the cabnet. Powering tubes in that class (ECC83s) is trivial compared to the day of the ABC where typical dual triode was maybe in the class of 6SN7 (6.3V at .6A) or worse. Early tubes where power hungry for heater power. Allison > >> I in no way said that I wanted everything made of lightweight (and >> easily breakable) plastic, it's just annoying when things are severely >> over-enginered and thus increase the weight, or use heavier components >> when lighter ones would work in a perfectly acceptable manner. > >Well, there are limits, but I must admit I tend to admire solid >overengineered devices. > >-tony

17 years, 7 months

ECC on MFM drive

by aek＠bitsavers.org

> I have ST251 drive and an Adaptec controller. Look at the chip set data sheets on bitsavers.

17 years, 7 months

[Toronto Canada] - AES Plus free for collection

by john_a_s2004＠hotmail.com

Hi, I have had an email from an owner of an AES Plus system, who is looking to give it away to a good home. This system is a dedicated Word Processor, built around an 8080 processor. The owner has loads of disks too, these might be rare 16-sector hard-sectored types and so it would be worth collecting the system just for the floppies. If you are able to collect the whole system from the Toronto area, please email me and I will pass your details on. Regards, John _________________________________________________________________ Make a mini you and download it into Windows Live Messenger http://clk.atdmt.com/UKM/go/111354029/direct/01/

17 years, 7 months

IBM memory available

by pat＠computer-refuge.org

I've got a bunch of DIMMs pulled from RS/6000 SP hardware available for not much cost. The memory is 3rd party (Kingston) 512MB DIMMs that were used in Purdue's SP high node systems. Third-party memory doesn't seem to be worth much, so I'm not asking too much, say $10+shipping per set of 8 or so. These are equivalent to IBM FRU 07L9758, F/C 4121 or 4100 This memory works in at least the following systems: 7044-170 (44P-170) 7044-270 (44P-270) pSeries 640 / B80 pSeries 620 9076-270 thin/wide and 9076-N81 SP high nodes Pat -- Purdue University Research Computing --- http://www.rcac.purdue.edu/ The Computer Refuge --- http://computer-refuge.org

17 years, 7 months

lead-free solder (was: Setting up a VAXstation)

by halarewich＠gmail.com

heres a link to some lead solder http://www.acehardware.com/product/index.jsp?productId=1290635&cp=2568443.2… Chris On 10/2/07, Zane H. Healy <healyzh at aracnet.com> wrote: > > At 11:37 PM +0100 10/1/07, Tony Duell wrote: > >For the first part, I'd offer to do it for you, but it would be illegal > >to do so. Owing to our totally daft laws, (a) I'd have to use lead-free > >solder, which I don't have, don't trust, and am not set up to use and > > How hard is it to work with lead-free solder, and is it becoming a > problem to get traditional solder in the US? I've been meaning to > pick up a few rolls. As I'm still using a roll purchased in the 80's > from Rat Shack for building a couple things for my VIC-20, I haven't > been going through it that fast. Though I seem to be using it more > often now than. > > >(b) > >it has been said that if an enthusiast (specifically a model engineer, > >but it would apply here too) does jobs for others, then his workshop > >becomes a workplace and is covered by all the daft health-and-safety > >rules that I have no desire to get involved with, and which quite > >honestly, would stop me from getting on with things. > > Does it count as a job if you don't take payment? > > Zane > > > -- > | Zane H. Healy | UNIX Systems Administrator | > | healyzh at aracnet.com (primary) | OpenVMS Enthusiast | > | MONK::HEALYZH (DECnet) | Classic Computer Collector | > +----------------------------------+----------------------------+ > | Empire of the Petal Throne and Traveller Role Playing, | > | PDP-10 Emulation and Zane's Computer Museum. | > | http://www.aracnet.com/~healyzh/ | >

17 years, 7 months

Interesting driver...

by geneb＠deltasoft.com

While reading comp.sys.cbm, I ran across this site: http://simonowen.com/fdrawcmd/ I would imagine that this driver would come in quite handy for those wanting to work with foreign formats while using Windows. g. -- Proud owner of F-15C 80-0007 http://www.f15sim.com - The only one of its kind.

17 years, 7 months

Mac SE Flyback!

by julianskidmore＠yahoo.com

Hi folks, I hope a Mac SE is old enough to chat about here - it's hardly newer than my pdp11 or Vax! Anyway, the Mac's good, but the flyback Transformer burnt out a while back and I was wondering what would be a suitable replacement. I have information on the Mac Plus analog circuitry from Mac Tech and the parts numbers for the Mac SE flybacks. However, none of this gives me the spec for the flyback and since AFAIK they're not available any more, I'm wondering how to get a suitable replacement. It doesn't have to look the same, it just has to work and be reliable! http://www.biwa.ne.jp/~shamada/fullmac/repairEng.html Tai-Ho/Taiwan R.O.C. TH-1565C Mac SE Lifon/Taiwan R.O.C. 157-0042-A Mac SE, Repaired analog board, SE/30 Lifon/Taiwan R.O.C. 157-0042-B Mac SE, Repaired analog board, SE/30 Lifon/Taiwan R.O.C. 157-0042-C Mac SE, Repaired analog board, SE/30 http://home.earthlink.net/~gamba2/images/plus_analog.PDF This is probably going a bit far ;-) : http://members.misty.com/don/samflyhv.html -cheers from julz @P

17 years, 7 months

FORSALE: IMSAI 8080 in excellent shape

by michaelgreen42＠comcast.net

Picked up a recent acquisition and thought I would try here before I send to eBay. I have an original IMSAI 8080 in great condition. It comes with two floppy drives. I don't really know how to test but it powers up and all the blinking lights come on. Taking best offer of cash/trade. I'm located near Seattle WA. Obviously if you're local trades will be easier. Email me with offers.

17 years, 7 months

VCF East 5.0 This Weekend, September 13-14

by sellam＠vintagetech.com

\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/ Vintage Computer Festival East 5.0 Saturday and Sunday, September 13-14, 10am to 6pm InfoAge Learning Center, Wall Township, New Jersey http://www.vintage.org/2008/east/ /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\ The 5th annual Vintage Computer Festival East is happening THIS WEEKEND! Come and join us to celebrate the history of the machines, stories and people of the computer revolution. VCF East 5.0 is taking place on Saturday, September 13th through Sunday, September 14th from 10:00am until 6:00pm at the InfoAge Learning Center in Wall Township, New Jersey. The VCF features an excellent line-up of speakers, a fantastic exhibition of vintage computers, and a marketplace where you can find that one item you're looking for to get that old machine running again! Highlights of VCF East 5.0 include a presentation by Bill Mauchly, son of computer pioneer and ENIAC co-inventor John Mauchly, as well as the grand opening of the MARCH Grabbe Computer Museum at the InfoAge Learning Center. -=/ VCF East 5.0 Speaker Schedule /=- Saturday, September 13 Time Speaker Topic -------- ---------------- ------------------------------------------ 10:30 AM Watts Humphrey MOBIDIC and Fieldata 12:00 PM Claude Kagan Memories of the Computer Industry 1:15 PM Evan Koblentz MARCH - Grabbe Computer Museum Opening Sunday, September 14 Time Speaker Topic -------- ---------------- ------------------------------------------ 10:30 AM Fred Carl What's up with the InfoAge Science Center? 11:30 AM Bill Mauchly ENIAC: The Heaviest Personal Computer For more information on our speakers including talk abstracts and bios please visit: http://www.vintage.org/2008/east/speaker.php -=/ Workshgops /=- VCF East 5.0 is hosting two workshops by Vince Briel, creator of the Replica 1 (Apple-1 clone) and micro-KIM (KIM-1 clone). In each workshop VCF attendees will be guided through the construction of your choice of vintage computer replica by Vince himself. There are still open slots but they are filling up fast. Reserve your spot today! Information on the workshops can be found here: http://www.vintage.org/2008/east/workshop.php More information about Vince's replicas can be found at the Briel Computers website: http://www.brielcomputers.com/ -=/ InfoAge Learning Center Tours /=- Tours of the InfoAge Learning Center (the host of VCF East 5.0) are being held throughout the day concurrently with the VCF. For more information, please visit: http://www.infoage.org/ For complete information on VCF East 5.0 including admission and directions, please visit the VCF East 5.0 website: http://www.vintage.org/2008/east/ Best regards, Sellam Ismail Producer Vintage Computer Festival -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org [ Old computing resources for business || Buy/Sell/Trade Vintage Computers ] [ and academia at www.VintageTech.com || at http://marketplace.vintage.org ]

17 years, 7 months

DEQNA/DELQA cab kit with DEUNA/DELUA?

by jam＠magic.com

> Do you know what the extra two lines are for on the DELQA?. Do > they also exist on the DEUNA? Better yet, can you point me to the > printset for a DEUNA? >From the DEUNA print set ... The transceiver cable connects the following signals from the DEUNA to the AUI connector: 1 Power 4 Power return 6 Receive+ 7 Receive- 10 Transmit+ 11 Transmit- 14 Collision+ 15 Collision- 20 Fuse low In addition, the other pins on the DEUNA connector are: 2 Power (same as pin 1) 3 Power return (same as pin 4) 5 Ground 8 Ground 9 Ground 12 Ground 13 Ground 16 Ground 17 Open 18 Open 19 Open I'll try to get a chance to scan the DEUNA print set this week and send it over to bitsavers. James Markevitch

17 years, 7 months

Free: Heathkit H-89

by silent700＠gmail.com

Not mine - just found it on Craig's. Too far from me or I'd be all over it myself: http://grandisland.craigslist.org/sys/822183001.html

17 years, 7 months

DEQNA/DELQA cab kit with DEUNA/DELUA?

by oldcpu2＠rogerwilco.org

On Sun Sep 7 12:35:44 CDT 2008, James A. Markevitch said: > From the DEUNA print set ... > > The transceiver cable connects the following signals from the DEUNA to > the AUI connector: > > 1 Power > 4 Power return > 6 Receive+ > 7 Receive- > 10 Transmit+ > 11 Transmit- > 14 Collision+ > 15 Collision- > 20 Fuse low This is great information. Thanks! Just checked the DELQA printset which gives the following for the 20-pin BERG: 1 Power 2 (key, pin blocked) 4 Power Return 6 Receive + 7 Receive - 10 Transmit + 11 Transmit - 12 Shield 14 Collision + 15 Collision - 18 Control out circuit A 19 Control out circuit B 20 Fuse OK which seems to agree entirely with the DEUNA information you have. This is good news! > In addition, the other pins on the DEUNA connector are: > > 2 Power (same as pin 1) > 3 Power return (same as pin 4) > 5 Ground > 8 Ground > 9 Ground > 12 Ground > 13 Ground > 16 Ground > 17 Open > 18 Open > 19 Open Okay, very nice to know this. > I'll try to get a chance to scan the DEUNA print set this week and send it > over to bitsavers. That would be great! I don't think there is any particular urgency, now that I have the BERG pinouts, but I'm sure the community at large (and me) would appreciate having that online somewhere in the future. Many thanks! - Jared

17 years, 7 months

DEQNA/DELQA cab kit with DEUNA/DELUA?

by oldcpu2＠rogerwilco.org

On Sun Sep 7 05:37:28 CDT 2008 tiggerlasv said: > As far as I can tell, the pinouts for the 20-pin BERG connectors > on the DEQNA, DELQA, and DEUNA are functionally equivalent. > > (The DELQA uses 2 extra lines, but those will most likely be ignored, > particularly if you're using a media converter, to translate to RJ45. > . .) Yes, I've got a few AUI-to-TP transcievers and I plan to use one of them to make the connection to the LAN. Do you know what the extra two lines are for on the DELQA?. Do they also exist on the DEUNA? Better yet, can you point me to the printset for a DEUNA? > You can also use the DELQA / DEQNA cab-kits interchangeably, > for basic ethernet operations on the PDP-11. . . Yes, thanks for confirming this. I do have a handful of DEQNA setups and last year picked up a DELQA. Indeed, I successfully used a DEQNA cab-kit on the DELQA when I tested it out. Thanks for the good info! - Jared

17 years, 7 months

Nuclear Data ND-812 info...

by derschjo＠msu.edu

Hey all -- Got my hands on a pair of Nuclear Data ND-812's (thanks, Mike!) and I'm looking for any info/software for them. I've got the stuff off of Bitsavers already :). 12-bit machine from ~1971, toggle switches and blinky lights. Actually, these are BR2412s -- evidently military versions of the ND-812. They're green :). The other major differences (from glancing through the maintainance docs on Bitsavers and comparing to mine) are that the ND-812 used core memory, and the machines I have use DRAM (Looks like 24kw of Intel 1103's!). And as a result the BR2412 has a completely different power supply, which I'd love to have information for so I can test it out before powering these things on. And I assume the color scheme was different :). Anyone know the history of this machine (or even the company itself? Did they make any other computers?) I can't find too much information on the 'net... Josh

17 years, 7 months

Using WatCom WASM.EXE - How to obtain a listing file?

by jhfinedp3k＠compsys.to

This must be a really dumb question, but I don't seem to be able to figure out how to obtain a listing file. I just downloaded open-watcom-c-win32-1.7a.exe and installed it without any difficulty. It assembles my source file and I can link with wlink. It all works perfectly. After more than 2 years, I am able to duplicate the DLL file that I am using and which I want to modify. But wasm /h command does not even mention anything about a listing file! Is there any way that I can obtain a listing file of the assembled source code? Thus far, WatCom has the only assembler / linker pair that I have found which can duplicate the DLL that I am using. So shifting to a different assembler may not be useful. Does WatCom have another EXE file that I am missing that is used to produce a listing of the assembled source code? Also, it would be helpful to have a link map, although right now I probably would not know what to do with one. Sincerely yours, Jerome Fine

17 years, 7 months

OT: Linux and OpenOffice

by tonym＠compusource.net

-----Original Message----- >From: John C. Ellingboe john at guntersville.net >Sent 9/6/2008 3:56:36 PM >To: General Discussion GeneralDiscussion@ >Subject: Re: OT: Linux and OpenOffice > >I use Debian Linux which Ubuntu is based on but there can be some real >differences in places. There is a Ubuntu user mailing list where you >can get the best help/info ever for that distribution. I have been >using Debian for close to 20 years now and because of my age it is kinda >like a comedian once remarked "I don't believe I know all I understand >about that." :-) I guess there have been too many changes over the >years for an old man to keep up with them all. > Now - with my specific issue, would it be smarter for me to sniff around FireFox forums/lists first? Or go to the distro forums/lists? Tony

17 years, 7 months

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test-drb