test-drb

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101090 discussions

by dgriffi＠cs.csubak.edu

Is there someone out there with an LT-1 floppy disk or two they'd be willing to sell or trade? -- David Griffith dgriffi at cs.csubak.edu A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail?

15 years, 5 months

Apple/Corvus Whatsit

by silent700＠gmail.com

On Dec 30, 2010 7:49 PM, "Al Kossow" <aek at bitsavers.org> wrote: > It is a Corvus Omninet interface for a Macintosh. I'd be interested in the > software, if it should turn up in the pile. Ahhh, it does have that early Mac look to it. What did Omninet use for media? There is no other connector beside the 9-pin. Is it the three little pins?

15 years, 5 months

OT: Scrapper question

by cclist＠sydex.com

Does anyone know if tantalum is recovered from electronic waste? No particular reason for asking, other than pure curiosity. Thanks, Chuck

15 years, 5 months

Apple/Corvus Whatsit

by silent700＠gmail.com

While sorting through my voluminous Apple // hoard today I uncovered this device: http://silent700.blogspot.com/2010/12/what-is-it.html Anyone have any idea what it is? There in only the ribbon cable with 9pin male connector on it and the cutout which has 8 DIP switches and a 3-pin connector. I am somewhat familiar with the Corvus hard drive and networking systems for the Apple // line but I have never seen this. I also uncovered a boxed (board, manual, sw inside) Apple Turnover kit. The floppy is (c) 1985 F. Cisin. Is that our own Fred Cisin on this list? I have at least a couple dozen (so far) mystery Apple // cards in this box....I *know* if I approach the search correctly, one will be a Swyft ;) -- jht

15 years, 5 months

Looking for EPROM 2708 help

by trebor77＠execpc.com

Is there anyone out there that can BURN a 2708 EPROM for me. My Data I/O System-19 W/UNIPAK is DAS Kaput. It will not burn me a good prom. Not Sure why though. My Fault ???? I am trying to add some code to Dave Dunfields Monitor to find out why the 2708 that Andrew burnt is malfunctioning on my N*. I have tried to add several lines of code but the resulting Prom just doesn't perform the way the Andrew Prom does. I am using a SOL-20 System/Bus Probe that will Single Step the N* CPU so I can then track the code and its execution. I can see the results of the OUT 3 & 2 Instructions but not the IN 2. I am going to add jumpers to the Probe to display "Data In" as well as the existing "Data Out" and that might help. I have at least 5 2708's and can mail one out then I can sent the Code as an attachment. ALSO is there anyone out there using Dave's Monitor Mapped at "0000" that would be willing to test the 2708 that I have; that works somewhat; that way I could determine if the Fault is in the N* or in the Code itself. Since I can't burn a New Prom I am up the creek without a Paddle so to speak. TIA Bob in Wisconsin

15 years, 5 months

3B2 questions

by ian_primus＠yahoo.com

Well, I now have a 3B2/310 that will power up and talk to a serial terminal. I have two hard drives, but neither one works - one makes horrible squealing noises, the other only makes annoying squealing noises... I really need the Devtools floppy to boot and format hard drives, so I can install another disk. I did manage to track down a disk image of a diagnostic disk, containing FILLEDT, but I can't get it to run the program from disk, it hits a firmware error. This might be intended for some other 3B2. I also found the SCSI tools disk, which only formats SCSI hard drives. I need the Devtools floppy intended for the MFM drives. Does anyone have a disk image of this floppy, preferably in ImageDisk format? Thanks! -Ian

15 years, 5 months

40 track 5.25-in FDD [was: RE: HP drives]

by thomas.gardner＠sbcglobal.net

> Date: Tue, 28 Dec 2010 11:48:10 -0800 > From: "Holley, Michael" <michael_holley at mentor.com> > Subject: RE: HP drives > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk at classiccmp.org> > Message-ID: > <1775CC70CD47484EA68ACCD903F02CB302387DD7 at na3-mail.mgc.mentorg.com> > Content-Type: text/plain; charset="us-ascii" > > The original Shugart SA400 minifloppy (August 1976) only allowed 35 > tracks. In early 1977 Wangco announced the Model 82 Micro Floppy that > allowed 40 tracks with new media. > > Here is a photo of both disks. > http://commons.wikimedia.org/wiki/File:Verbatim_5.25_minidisk_tracks_1978.jp g > > Michael Holley FWIW, I've been told the reason the SA400 could not go beyond 35 tracks was that it used the same slider as the 8-inch product that could run into the spindle. The SA400L was a redesign that allowed the carriage to go further in. If anyone cares, I can get details from some ex-Shugart Associates friends. Can anyone confirm that Wangco was the FIRST to go to 40 tracks? FWIW I'm told by Shugart Alumni that it was Tandon. Tom

15 years, 5 months

Old computers on Superbowl?

by david＠classiccomputing.com

> Message: 12 > Date: Tue, 28 Dec 2010 22:58:21 -0800 (PST) > From: steven stengel <tosteve at yahoo.com> > Subject: > To: cctech at classiccmp.org > Message-ID: <266132.43443.qm at web110601.mail.gq1.yahoo.com> > Content-Type: text/plain; charset=us-ascii > > I rented-out a dozen of my old computers to some Hollywood people for use in a Motorola TV commercial, to possibly be shown during the Superbowl. > > Includes systems from the 70s and 80s, like Sol-20, TRS-80, Osborne 1, SX-64, etc. > > Keep an eye out for it! Steven, Did they happen to say what the theme of the commercial is? Perhaps the computers will serve as technology backdrops to the evolution of their phones? Best, David Greelish, Computer Historian Classic Computing The Home of Computer History Nostalgia http://www.classiccomputing.com Classic Computing Blog Classic Computing Show video podcast "Stan Veit's History of the Personal Computer" audiobook podcast Retro Computing Roundtable podcast Historical Computer Society Classic Computing Expo 1.0 - planning for sometime late 2011!

15 years, 5 months

Debugging under RSTS/E

by jhfinedp3k＠compsys.to

I have probably asked this question before, but without the additional information. I am enhancing the code in a program that runs under RSTS/E (or at least the RT-11 RTS under RSTS/E), RT-11, TSX-Plus and RTEM-11 (or at least some sort of RT-11 emulation under RSX-11 which Johnny has described to me before, but which I am not quite sure how to characterize). Quite recently (just yesterday in fact), I attempted to use ODT* again under RT-11. Ever since SD(X).SYS arrived in RT-11 with V05.04, ODT* has no longer been very useful. However, I was rather surprised to find that it not only works quite well, but in addition, does not freeze system jobs. Being in an experimental mood, I also managed to copy ODT.SAV* over to RSTS/E and found to my astonishment that it also works there very well, I presume under the RT-11 RTS under RSTS/E. My question is: How does a user debug a program under the RT-11 RTS under RSTS/E? Is ODT* generally considered the only way? Up until now, I did not even have an answer. And no one else seemed to know either. There is one rather minor difficulty with using ODT* in that I do not have the source for the program that is being enhanced and I must work with just the SAV file. If anyone is interested, I can let them know how I solve that problem as well. In addition, I still do not have any documentation for how RTEM-11 supports RT-11 EMT requests? Can anyone help? Does anyone have access to a running RTEM-11 that I can at least use to perform some tests? Jerome Fine * For those of you who know better, I am actually using the variation of ODT called VDT which does everything that ODT does, but also runs in a multi-terminal environment as well as under the normal single terminal monitors such as the distributed RT11XM.SYS monitors that DEC produces for the binary RT-11 distributions. To my surprise, VDT also runs under VBGEXE, although I actually tried that after running VDT.SAV under the RT-11 RTS under RSTS/E. About the only advantage to using VDT is that SDX.SYS freezes system jobs during a breakpoint while VDT does NOT affect the operation of a system job, i.e. the system job keeps right on running even when VDT is holding the background job at a breakpoint. In my testing situation, this is a big advantage. Of course, the advantage of VDT under RSTS/E is that this seems to be the ONLY way to have debug capability.

15 years, 5 months

TRS 80 available in Kansas city

by jws＠jwsss.com

I can pick it up, or have it picked up and shipped. Cost is $25 at the Surplus Exchange. You might be able to acquire it over the web, haven't looked. I have asked some friends to see about getting it with an eye to someone here wanting it. Description is "system, printer, monitor and two 5 1/4 floppy drives" Shipping would be extra.

15 years, 5 months

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