test-drb September 2001

test-drb@ccmp.vtda.org

256 participants
661 discussions

by Antonio.Carlini＠riverstonenet.com

> ard(a)p850ug1.demon.co.uk wrote: > >The book you _must_ get is 'The Art of Electronics' by Paul Horowitz and >Winfield Hill. Seconded and thirded :-) I also like A Practical Introduction to Electronic Circuits by Martin Hartley Jones. Electronics for Engineers by Ahmed and Spreadbury is quite good too. Antonio

22 years, 10 months

DOS 1.0 copyright string

by RCini＠congressfinancial.com

Hello, all: I was able to get my hands on the two DOS 1.0 disks. So, I spent a few minutes with Sourcer and a good hex editor in search of the DR copyright notice. I didn't find it. Maybe I misunderstood the timing of the message, but I thought that the 1.0 version of DOS contained copyright information from Digital Research and when IBM found out, they compelled MS to expunge it, resulting in the 1.1 version. The file dates are as follows: c:\>dir a: Volume in drive A is 3COM53_D1 Volume Serial Number is 11DC-3A5E Directory of A:\ 07/23/81 12:00a 1,920 IBMBIO.COM *** 08/04/81 12:00a 3,231 COMMAND.COM *** 08/13/81 12:00a 6,400 IBMDOS.COM *** 09/10/01 09:28a 66,235 COMMAND.LST 09/10/01 09:27a 4,374 IBMBIO.SDF 09/10/01 09:28a 143,874 IBMDOS.LST 09/10/01 09:28a 16,231 IBMDOS.SDF 09/10/01 09:27a 25,780 IBMBIO.LST 09/10/01 09:28a 10,141 COMMAND.SDF 9 File(s) 278,186 bytes 1,177,088 bytes free The files are all dated before the PC's release. I find it interesting that the file date for DOS proper was one week before the PC announcement. Microsoft tweaking until the last minute. IBMBIO contains only a revision mark and no copyright notice. IBMDOS contains a header common to all versions of DOS ("M;S<>=~KRAA") and no copyright notice. COMMAND contains a copyright message which is the one probably displayed upon execution: The IBM Personal Computer DOS Version 1.00 (C)Copyright IBM Corp 1981 Licensed Material - Program Property of IBM So, where did I go wrong?? 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)

22 years, 10 months

Introductory Electronics Book?

by Robert_Feldman＠jdedwards.com

I'd like to get some recommendations from the list for a good introductory electronics book for my 14 year-old son. He's interested in building an intercom system (and other circuits) that he got off the Web, and I would like something for him to read that will give him a good understanding of how the circuit works. (For example, it uses the primary windings of a 120V:12V transformer as a coil.) TIA.

22 years, 10 months

Vector 3/Teledisk

by r.stek＠snet.net

FWIW, I did once correspond with the Catweasel guy and he said it would do N* 10-hole hard-sectored disks, but he had never had a request or seen a N* disk. I was supposed to send him some samples but never got a round tuit. And don't forget, it has already been done - the Microsolutions MatchPoint card allows your PC to read N* disks. Of course, just try to find one! If it provides motivation for one of you hardware types with nothing better to do, I'd lend my support to requesting an add-in card which could handle the 10 and 16 hole 5.25" disks and the 32 hole 8 inchers as well (I have a lot of ProcTech Helios disks). Bob Stek Saver of Lost Sols

22 years, 10 months

VMS Licenses (was Re: recent acquisitions for the House of VAX

by dittman＠dittman.net

> >>Hello- > >>I have been pursuuing the OpenVMS license and media for > >>about 6 months with no success. > >>i.e. > >>http://www.openvms.compaq.com/openvms/freeware/ > >>http://www.montagar.com/dfwlug/openvms-faq.html > >>I have an AlphaStation 200/233 that I would like to install > >>OpenVMS to. > >>Do you have any ideas on how I get a copy through legal > >>or hobbiest channels? > > > Something to note is that the VMS licenses from the Hobbyist program will > work on VMS 5.x and beyond, they will _not_ work on VMS 4.x (the LMF > changed significantly between 4.x and 5.x). However, since most "classic" > folks will want to use VMS 5.5x (all MicroVAXen before the 4000 series) or > 6.x (includes the 4000s) that should be fine. Also the older ConDists sell > for reasonable amounts on Ebay. Further, there is nothing particularly > "special" about the ConDist and they can be copied using a modern CD burner > on a PC using an image copy and work just fine (this was how I got my first > ConDist) LMF was introduced with VMS 5.0. Before that the licenses were actuall patch files. -- Eric Dittman dittman(a)dittman.net Check out the DEC Ethusiasts Club at http://www.dittman.net/

22 years, 10 months

Recent finds

by optimus＠canit.se

It's been a wet week in Stockholm, but nevertheless, thanks to the waste management of the technical university, we've managed to scrounge together some interesting pieces. A lot of HP things, mainly HIL mice and keyboards, much to my joy, since I can now use my 9000/380. But what does a HIL ID module do? We also found a more or less complete 9000/425 system (no hard drives, but a monitor and two tape drives which were buried too deep for us to get at). Then we found an Apple II clone by Copam, which I've previously thought was just a soul-less PC clone manufacturer. Now it turns out that they were once a soul-less Apple clone manufacturer as well. =) The unit is called the Base-64A, which sounds supiciously like a MIME encoding, and it's got a floppy drive, too. The Base-64 was perched atop some old cabinet with a lot of rain in it and warning labels about the Winchester drive, which is a hulking full-height fourteen-inch unit. I found a card outside the cabinet which looked like a full- height QBus card. It's got two AMD 2901s, which is a bit-slice processor. Another (half-height) card was left inside the cabinet, it, too, featuring a pair of 2901s. Because we were already loaded, and because of the rain and the size of the thing, we decided to leave it behind, but I took the card I'd found with me for further identification. The card and the cabinet are made by Plessey Peripheral Systems, and my quick research indicates that this is some PDP-11 (or should it be an LSI-11?) clone. Will those two cards we found really suffice for a functioning system? Four 2901s should only add up to four bits according to my calculations... There was a lot of old terminals there as well, but I've got enough of those already. It was rather interesting to see an old Tandberg terminal of ours, though, only branded with the Norsk Data label andfeaturing an orange colour scheme instead of Tandberg's brown/beige. I suppose it's been hooked up to some Nord mini once upon a time. -- En ligne avec Thor 2.6a. "Computer games don't affect kids, I mean if Pac Man affected us as kids, we'd all be running around in darkened rooms, munching pills and listening to repetitive music." David McMinn

22 years, 10 months

Any Tektronix 4051, 5042, 4054, or 4662s or IBM 5100s out the re?

by monty.mcgraw＠rlxtechnologies.com

I was successful in finding not only a 4052 with 4662 multipen plotter and 4631 hard copy unit (lots of internet searching) - but also a 4054 on EBAY! I got the 4052 working after repairing the tape drive board and cleaning the tape heads. The 4631 needed new paper and one of the toothed belts - got both and it works fine. The 4054 repair consisted of replacing one of the 16k bit DRAMs! I have also added two Tektronix 4041 GPIB controllers with one line LED displays and built in thermal printers. I now have quite a collection of 4050 and 4041 series tapes - some with my old programs from the late 70's in the USAF, some including the Tek System Tapes and some game tapes, also some of the 4052 cartridges. Sorry, at this point I'm interested in keeping my collection. Contact me direct if you are interested in any tapes, though. Monty McGraw Spring, TX (near Houston)

22 years, 10 months

HP 3000 (Micro 3000) free in New Jersey

by LFessen106＠aol.com

In a message dated 9/10/01 2:02:52 PM Eastern Daylight Time, sieler(a)allegro.com writes: > Hi, > > Is anyone is interested in a free, > working Micro 3000 XE (desktop size Classic > HP 3000), complete with disks, tape drive > ... and is willing to pick it up (or pay to have it picked up), > please contact me soon. > > Disk drives: HP 7958, and HP 7936. > Tape drive: HP 35401 (9144 cartridge tape auto changer) > MPE Version is V-Delta 5. > > It's in Lebanon, New Jersey, off of Route 78. > > thanks, > > Stan I would be interested possibly. I dont know a thing about them though. I live right off of 78 in Easton PA. -Linc Fessenden In The Beginning there was nothing, which exploded - Yeah right... Calculating in binary code is as easy as 01,10,11.

22 years, 10 months

Guide to Collecting Computers - on-line edition.

by mcguire＠neurotica.com

On September 5, Absurdly Obtuse wrote: > > In 1998 the book, A Guide to Collecting Computers and Computer Collectibles: > > History, Technique, and Practice was published. An abridged edition is now > > available at: www.unusual.on.ca/guidecollectcomputer > > > > Your comments are invited as are any hints where I might find a complete > > 370/165 or 168. I'm forever hoping. > > What kind of systems are these? I will keep my eyes open. If you are > talking IBM big-iron, that can be arranged. *evil grin* I saw a 370/168 once. I'd swear it was the single largest computer I've ever seen. The building it was in had a disk drive *floor*. I had to use bleach on that underwear. -Dave -- Dave McGuire Laurel, MD

22 years, 10 months

recent acquisitions for the House of VAX

by dittman＠dittman.net

> > you should really dump the license PAK's and print them out! > > I don't get this. Isn't this like walking up to a combination lock > and saying "SHOW COMBINATION". Shouldn't be possible, > should it? No, this isn't the same. These are licenses, not locks. If anyone is curious, the command is "LICENSE ISSUE xxx", and issuing the license disables it, so you have to "LICENSE ENABLE xxx" to reenable. Also, I'd recommend using the /OUTPUT qualifier if you are going to print the licenses and using both /OUTPUT and /PROCEDURE if you want a copy that you can easily reload later. -- Eric Dittman dittman(a)dittman.net Check out the DEC Ethusiasts Club at http://www.dittman.net/

22 years, 10 months

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test-drb September 2001