test-drb February 1999

test-drb@ccmp.vtda.org

178 participants
709 discussions

German Retrocomp (was Re: 1130 has been claimed)

by Jgzabol＠aol.com

In einer eMail vom 04.02.99 03:23:05 MEZ, schreiben Sie: << On Wed, 3 Feb 1999 Jgzabol(a)aol.com wrote: > There is a _WORKING_ 1130 at the IBM Museum in Sindelfingen, Germany. If only I'd known when I was planning my trip to CeBIT -- I could have flown out of Frankfurt instead of Berlin, and dropped by. Any retrocomputing facilities in Hannover or Berlin? Brad Ackerman >> There is the Nixdorf Museums-Forum at Paderborn, which is not too far from Hannover, less than one hour southwest by car. They do not have any live equipment, but about one of everything not live. They begin somewhere with the Assyrians xxxx B.C. up to Cray-2 and connection machine; Nixdorf tube machines; Russian machines; mechanical calculators and telephone exchanges; and Jacquard loom, the ancestor of anything with punched holes. Address: Fuerstenallee 7, 33102 Paderborn Look at http://www.hnf.de for more details. I also recommend strongly the "Deutsches Technik-Museum" in Berlin. They have a small, but significant set of exhibits: - Replica of Zuse Z1 (1936), built by Zuse himself, mechanical computer, operational; - Zuse Z23, first transistorized computer by Zuse, I believe also operational. - several other less prominent computer exhibits - quite a selection on history of the electron tube and telecom Normally the machines are not operated. I understand that upon special request an appointment could be made, and a knowledgeable person would come in and operate the Z1 and/or Z23. Contact person is Hadwig Dorsch, details see http://www.dtmb.de A pity that Munich is too far out of your travels - the Deutsche Museum here also has quite a selection, but nothing live. Hope you will enjoy your trip John G. Zabolitzky

25 years, 11 months

Sanyo MBC-550 (Yuck!) software available

by rigdonj＠intellistar.net

A few weeks ago we were talking about the Sanyo 550 series and someone mentioned one of the alternates operating systems that supported 80 track drives in the 550. I said that was DS-DOS by Michtron. Today I found an old Sanyo disk package with four disks for the 550. One of them is DS DOS 2.11, one is InfoStar, one is MailMerge/SpellStar and the other is a disk of misc utilities. The first three are original disks. In additon, the InfoStar, MailMerge/SpellStar are Sanyo labeled disks that came with the 550. If anyone wants them, trade me something I can use and they're all your's. Joe

25 years, 11 months

3-phase (was: Re: CDC 9766 Drive and packs)

by Philip.Belben＠pgen.com

> My line is prepared for 40 kW 3 phases, since the former owner also > used electric heating (this kind of night loading heating), but since > I switched for gas, I can use anything for my computers :))) > >> Anyway, figure that we're stuck with 230 volt single phase (115 volts from >> either leg to earth) at our NA homes, while as I've seen for example >> normally in Southern Germany at least, 380 volt 3 ph (220 volts from either >> leg to earth) is the norm in most other modernized parts of the world. > > In facht it is 400V/230V since more than 10 to 15 years, but everybody > is still talking about 380V/220V ... And yes, 3 phases are the only kind > of connections the power companies offer - so the outlets will be split > up among the phases to get an even load (3 phases outlets are not very > common :). You must have changed voltage long before we did then - we went from 415/240 V to 400/230 only about 5 years ago. Like with you, people still talk about the old voltages, and my voltmeter still reads 248V... (BTW it used to be 240V +/- 6%. It is now 230V +10% -6%, so electricity companies haven't had to change anything.) A few rural installations are only given 2 phases of the 11kV distribution, rather than all 3. This means that a single phase transformer is used, rather than a 3-phase transformer (Yes, I know, in the US you often get poles with three single phase transformers hung off them). Usually this is 240V, but sometimes 480V centre earthed is used, the two sides supplying different houses. Apparently some farm machinery operates on 480V single phase, but I don't think much else does. Philip

25 years, 11 months

HP Docs sold -- thanks for your interest!

by kyrrin＠bluefeathertech.com

Hello Frank, Eric, Sam, Stan, and the rest of the list, Thanks much for your interest. I replied to the responses (there were six counting yours -- I'm impressed!) in the order that I received them. All the manuals I referenced are now spoken for. FWIW, the HP Customer Support manual went to Jay West, and the 9825 books to Anthony Eros (he actually has a 9825 he needs docs on). Thanks again to you all for your interest. I will continue to keep an eye out for other 'classic' docs and goodies. -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Bruce Lane, Owner and head honcho, Blue Feather Technologies http://www.bluefeathertech.com Amateur Radio:(WD6EOS) E-mail: kyrrin(a)bluefeathertech.com SysOp: The Dragon's Cave (Fido 1:343/272, 253-639-9905) "Our science can only describe an object, event, or living thing in our own human terms. It cannot, in any way, define any of them..."

25 years, 11 months

RT-11: ?DIR-F-Invalid directory

by dburrows＠netpath.net

I thought you were using an 11/73. Just get into the console and type b mu0: to boot the tape if it is at 1774500. I am on the road right now but when I get back I could look up the CPU info and let you know the how to get into the console. My brain is dead right now - been up for 21 hours and just finished eating dinner. Dan > >I'm seriously bummed. However, I finally got smart and made a bootable >TK-50 so if need be I can load RT-11 without to much difficulty (other than >having to type in the bootstrap by hand). >

25 years, 11 months

Anybody interested in PETs/ Anyone in Toronto

by cbajpai＠mediaone.net

Looks like I'm buying a ton (7-8) of PETs + disk drives + printers. Only problem is that I was only looking for one. The terms of the deal are as-is, where-is. If you interested in a PET please let me know. Anybody in Toronto that could check the units out for me? Any idea on the best/cheapest way to ship to Boston, Mass? I'll post more detail when I get them. Thanks, Chandra

25 years, 11 months

RT-11: ?DIR-F-Invalid directory

by mbg＠world.std.com

>The disk is a 150Mb ESDI drive attached to a Webster WQESD ESDI >controller. The controller allows be to carve the drive into partitions >that look like separate RD52's. This nice little ability allowed me to >boot from the second partition. Unfortunatly I'd not been backing up to >another partition. Sounds like the Andromeda ESDC I have in my machine, with an ESDI disk... I have one disk partitioned as four RD54s... I have another partitioned as one large disk (still identified as an RD54, but at 680 MB) Anyway, its hard to diagnose directory problems from a distance... I'd need to see a dump of the first 68 blocks (0-67). Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com | | Unix Support Engineering Group | (home): mbg!world.std.com | | Compaq Computer Corporation | addresses need '@' in place of '!' | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 | required." - mbg | +--------------------------------+-------------------------------------+

25 years, 11 months

Adam parts

by gregorym＠cadvision.com

Hi. I have some ADAM software, but very few of the dreaded high-speed tape cassettes to duplicate it onto. If you can send me an ADAM cassette, I can dupe what I have - email me off-list if you're interested and I'll dredge through the storage closet and see what I've got. I frequently see the ADAM joysticks at the local thrifts; I can pick some up for you if you want - again, email me off-list. If you called Coleco, I'm sure their response would be either: "Sure, we've still got 20,000 unsold units in the warehouse" or "Send your computer, in it's original packing materials, to one of our convenient repair depots ... " Cheers, Mark. At 06:53 PM 2/3/99 -0500, you wrote: >Does anyone have any ADAM joysticks and/or software? ...or any commercial >source for them? > >What to you suppose would happen if I called up Coleco? > >manney > > > >

25 years, 11 months

tube CD player (was Re: sizes (was Re: vacuum tube computer))

by Philip.Belben＠pgen.com

> No problem. The tube CD player simply has an AES/EBU (or S/P-DIF) coaxial > digital output. If you want a tube D/A to go with it, that's a separate > product. > > The tube D/A would likely not use oversampling, but rather an 8-pole > analog filter. > > If people want a tube oversampling D/A, that can be a more advanced, larger, > and more expensive model. I agree with Tony. From an audio point of view, chips vs. valves (tubes, for those colonies who've forgotten how to speak English) should make no difference except in the analogue sections. On the digital side they have no more than old computer technology hack value. That said, oversampling and filtering is _not_ hard. People nowadays think only in terms of digital, discrete working and analogue, continuous working. IMHO the place to do oversampling is in between - in the Analogue, Discrete domain. How: Make several A-to-Ds (or one and some sample and hold circuits if you're a cheapskate). The simplest case is linear interpolation which uses only two. I would envisage precision ladder networks or something similar for these. Call them A and B (and C, D, etc.) Have some analogue circuits which use analogue summation techniques to derive (say) A, 0.75A+0.25B, 0.5A+0.5B and 0.25A +0.75B. Switch between them. You now have 4* oversampling, with simple linear interpolation. (After those four valuse, B becomes the new A and the next value from the digital side becomes B...) More complex filters can be implemented with more A-to-Ds (or a series of sample/holds or a bucket brigade etc) and more complex maths in the combinations. IIR filters can be implemented with a sample and hold that remembers the last _output_ And so on. (but dion't forget the conventional analogue filter on the output) No DSP required. Fun,eh?

25 years, 11 months

FS/FT: HP Documentation

by kyrrin＠bluefeathertech.com

I have the following available, both from HP: 'Data Systems Customer Support Handbook' dated Sep. 1980. Contains technical and support data for what appears to be a wide variety of early HP computer hardware, including what looks like source code for diagnostics (I just skimmed it -- didn't really read in detail). Here's a sample from the Table of Contents. Common Data 2114/15/16 2100 21MX-M and 21MX-E Power Supplies/Extenders Memories/Accessories Input/Output Parts Operating Systems I also have a binderful of user's guides for the HP9825A desktop system, circa March 1980, including: Operating and Programming 9872A Plotter Programming 98034A HPIB Interface - Installation and Service 98035A RTC - Installation and Operation Advanced Programming 98032A 16-bit Interface - Installation and Service Extended I/O Programming Matrix Programming General I/O Programming String Variable Programming 98036A Serial Interface - Installation and Service Systems Programming <Sheesh, what a load! The whole binderful weighs in at just over 9 pounds!) That's what I've got at the moment. Best offer (and I'm not looking for a fortune here, folks) plus mailing costs takes them! Thanks in advance. -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Bruce Lane, Owner and head honcho, Blue Feather Technologies http://www.bluefeathertech.com Amateur Radio:(WD6EOS) E-mail: kyrrin(a)bluefeathertech.com SysOp: The Dragon's Cave (Fido 1:343/272, 253-639-9905) "Our science can only describe an object, event, or living thing in our own human terms. It cannot, in any way, define any of them..."

25 years, 11 months

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test-drb February 1999