test-drb January 1999

test-drb@ccmp.vtda.org

189 participants
897 discussions

by Watzman＠ibm.net

The keyboard encoder in the Heath H-19 terminals (also the Zenith Z-19) was a National Semiconductor part. It was discontinued in late 1981 or 82, while the terminal was still in production. Heath bought tens of thousands of them in a "last time buy" both for ongoing production and for future service. I don't know the current availability of this item from Heath (Heath does still exist, and does sell SOME parts), but it hasn't been available from National for a decade and a half. It WAS a generic part at the time. Note that every H/Z - 89/90 has an imbedded H/Z-19 terminal and therefore uses this part. I'm not sure of this, but I think that the ROM was required because the encoder only generated a "key number" and not ASCII, and it wasn't easily possible to arrange the keys for the key number to correspond to the ASCII value (Carl Goy was the designer, and he's still around out in California somewhere, he worked for Mouse Systems and Headland Technology after leaving Heath). I know all of this because for 5 years I was the Product Line Director for the entire Heath/Zenith computer line. Barry Watzman

27 years

Ebay Posts was Re: Ebay: Very Old IBM Model 705 Tube-type Logic Module

by dogas＠leading.net

Ok... add 'lying' to conniving sniviling wheez... From: Marvin <marvin(a)rain.org> >On the other side of that coin, if I were trying to attempt to gain a >fortune in computers now, I would do everything I could to stop the free >flow of information. I guess by this, you mean buying computers now? And, the free flow of that information would never make it into this backwater tributary were it not for the duct system you've implemented. ok, ok... I know... enough.. - Mike:dogas@leading.net

27 years

MITS Sherwood Medical S-Twelve

by Marty＠itgonline.com

I take it from the lack of any responses that nobody has any info on MITS oem's? ______________________________ Reply Separator _________________________________ Subject: MITS Sherwood Medical S-Twelve Author: classiccmp(a)u.washington.edu at internet Date: 1/20/99 6:41 PM I don't remember if I asked for information on this computer before. I'm looking for any documentation or history of this Sherwood Medical computer. 'A Brunswick Company' is proudly proclaimed on the front panel adjacent to where it reads Sherwood Medical S-Twelve (which oem'd this MITS Altair for blood gas analysis). The Sherwood S-Twelve has eighteen slots, a heavy duty power supply and the following boards, all made but MITS: 8800 CPU BD REV 0 4K STATIC BOARD REV-2 X4 88-2 SIO REV 0 8K PROM BD REV 0- X2 INVERTER BD 88-IS SH REV 1 88 (SIOB) SERIAL TTL REV 1 MITS MODEM BD 88-MUX REV 1 MITS A/D CONVERTER REV 0 If you have any information about MITS 8800s sold to industry as in this case, please let me know. Thanks, Marty marty@itgonline ------ Message Header Follows ------ Received: from lists2.u.washington.edu by smtp.itgonline.com (PostalUnion/SMTP(tm) v2.1.9i(b5) for Windows NT(tm)) id AA-1999Jan20.184119.1767.94103; Wed, 20 Jan 1999 18:41:20 -0500 Received: from host (lists.u.washington.edu [140.142.56.13]) by lists2.u.washington.edu (8.8.4+UW97.07/8.8.4+UW98.06) with SMTP id PAA05856; Wed, 20 Jan 1999 15:38:31 -0800 Received: from mxu3.u.washington.edu (mxu3.u.washington.edu [140.142.33.7]) by lists.u.washington.edu (8.9.1+UW98.09/8.9.1+UW98.09) with ESMTP id PAA4 4800 for <classiccmp(a)lists.u.washington.edu>; Wed, 20 Jan 1999 15:38:24 -0800 Received: from smtp.itgonline.com (smtp.itgonline.com [38.250.184.4]) by mxu3.u.washington.edu (8.9.2+UW99.01/8.9.2+UW99.01) with SMTP id PAA273 43 for <classiccmp(a)u.washington.edu>; Wed, 20 Jan 1999 15:38:19 -0800 (PST) Received: from cc:Mail (PU Serial #1767) by smtp.itgonline.com (PostalUnion/SMTP(tm) v2.1.9i(b5) for Windows NT(tm)) id AA-1999Jan20.183955.1767.183302; Wed, 20 Jan 1999 18:40:13 -0500 Message-Id: <1999Jan20.183955.1767.183302(a)smtp.itgonline.com> Date: Wed, 20 Jan 1999 18:40:13 -0500 Reply-To: classiccmp(a)u.washington.edu Sender: CLASSICCMP-owner(a)u.washington.edu Precedence: bulk From: Marty(a)itgonline.com (Marty) To: "Discussion re-collecting of classic computers" <classiccmp(a)u.washington.edu> Subject: MITS Sherwood Medical S-Twelve Mime-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" X-Conversion-ID: <cc:Mail/#467847/ITG-OFFICE> X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN

27 years

OT: Alien Media (was Disasters and Recovery)

by Philip.Belben＠pgen.com

> It was thus said that the Great Philip.Belben(a)pgen.com once stated: >> >> I'd like to define it in terms of SI units, but the Kilogram is not too >> easy (yet). > > Really? The meter is defined (certain frequency of light from a certain > element for so many waves yada yada). Sea level is defined (don't know the > SI unit, but 780 millibars of pressure). Celcius is defined (0 is freezing > point of pure water at sea level, 100 boiling point of pure water at sea > level) and that's all you need to define the gram: one cubic centimeter of > water at 4C at sea level. That also gets you volume (liters). Well, sort of. The definition of a metre is actually 1/299792458 of the distance travelled by light in vacuo in one second. Wavelengths of the orange-red line in the spectrum of Krypton-86 went out long enough ago to qualify for this list at least! The definition of the kilogram is _still_ afaik "the mass of the international prototype kilogram" (or kilogramme, I suppose). And FWIW sea level pressure is 1013 millibars. 760 millimetres of mercury. But kilogram = mass of 1 cubic decimetre of pure water is probably accurate enough for most purposes as long as you don't have too much deuterium or oxygen-18. BTW Celsius isn't an SI unit. SI unit of temperature is the [degree] Kelvin (K, written without the degree sign), defined as 1/273.16 of the absolute temperature of the triple point of, oh no! It's water again! Again, specify hydrogen-1 and oxygen-16 and it's probably accurate enough... See. Not as easy as it sounds, but still possible. If you allow non-SI definitions, start with: Second = 1/86400 mean solar day (that changes only by a couple of percent every million years - enough that dinosaurs had a 400 day year, and ancient Babylonians observed eclipses a few tens of miles from where modern astronomers predicted them or at the wrong time of day) Metre = 1/40000000 circumference of Earth. Originally 1E-7 distance from N Pole to Equator through (I think) Paris. (Longer than SI metre by 0.02%) Then proceed as above with Celsius and volumes of water... Philip.

27 years

FYI: MEI/Microcenter is out of 5-1/4" diskettes

by steverob＠hotoffice.com

Didn't realize 5 1/4" DD were getting hard to find. I threw out about 25k a couple of months ago. If you need some, let me know. I'm sure there are more here, somewhere...? Steve Robertson - <steverob(a)hotoffice.com> -----Original Message----- From: James L. Rice [SMTP:jrice@texoma.net] Sent: Wednesday, January 20, 1999 11:38 PM To: Discussion re-collecting of classic computers Subject: Re: FYI: MEI/Microcenter is out of 5-1/4" diskettes My Amigas and my classic Macs as well as several Tandy's use the DD disks, so i buy all I can find. I've bought a lot recently at consignment store for about $1-2 for a box of 10. I think I have about 2k in stock now. James "Zane H. Healy" wrote: > > >I have been stocking up for the past three years. I have about 10k > >stored. Also 720k disks are not as easy to find anymore, so I've been > >gather a supply of those also. For my NeXT I scored a few boxes of > >2.88's recently. > > As I understand it the Amiga software industry is in a bit of a crisis at > the moment because 3.5" DD floppies are no longer being made. Well, > they're also in a bit of a crisis thanks to the idiots running Amiga, Inc. > killing the market last spring when it will be quite a while before the new > Amiga is ready to ship. > > Zane > > | Zane H. Healy | UNIX Systems Adminstrator | > | healyzh(a)aracnet.com (primary) | Linux Enthusiast | > | healyzh(a)holonet.net (alternate) | Classic Computer Collector | > +----------------------------------+----------------------------+ > | Empire of the Petal Throne and Traveller Role Playing, | > | and Zane's Computer Museum. | > | http://www.dragonfire.net/~healyzh/ |

27 years

Looking for pointers to old Control Data software

by jdykstra＠nortelnetworks.com

Gary Oliver wrote: > Does anyone on this list have pointers to old Control Data software, > specifically 7 track tapes (yes I can read these) and possibly > documentation (though I do have many of the old user manuals.) > I've tried contacting the lastest version of CDC and they offer no help > whatsoever. My guess is that Control Data Systems doesn't have any 3600 software, anyway. When I worked there in the 1980's, there were no 3600 systems left in the building (although the prototype 7600 was still on the test floor). It's also been a long time since they were supporting any 3600 customers. There might be some software in a corporate archive someplace, but Ceridian is as likely to have ended up with it as Control Data Systems. In either case, they'd probably only pull something from the archive if it was for company purposes. You might have better luck with universities that had 3600 machines. Michigan State was one of them; email me privately and I'll pass on a contact there. Purdue and Northwestern are other possibilities. Re reading old tapes, the following is hearsay, but it sounds plausible to me. Old tapes have a tendency to shed bits of oxide. If that oxide lodges on the heads or tape guides, and if the tape speed is high, friction may generate enough heat to permanently damage the tape and also the heads. Thus, it is prudent to carefully clean the tape before trying to read it. ---- John Dykstra jdykstra(a)nortelnetworks.com Principal Software Architect voice: +1 651 415-1604 Nortel Networks fax: +1 612 932-8549

27 years

IMSAI/586 [ Re: Multiuser computing invented! ]

by allisonp＠world.std.com

<Seriously, how slow can you clock a Pentium and still have it run? I think it's dynamic processor like the 8080 so there is a minimum clock that is likley a few Mhz. <More generally, can you build an IMSAI style box (with more LEDs :-) aroun <a Pentium and be able to single step the processor? Well, the imsai front pannel would have little relevance to the activities of the CPU due to internal cache and prefetch. Allison

27 years

RS-6000 external cables, new - no second mrtgage req'd

by rhblake＠bigfoot.com

Dalco has RS-6000 cables that have the IBM mini 60 centronics to an SCSI 50 centronics now for $18.50 instead of the usual $45 each or more. You can see the item at http://www.dalco.com/cgi-bin/nph-tame.exe/dalco/conpin.tam?cart=99A20yke.ha… or use the search and search for item 57520. My understanding is that they are a slight backorder though, but worth the wait if you want to use that PS/2 with external SCSI units. I may actually get my 8595/XP server online again, this time with my cdroms.

27 years

Blue Thunder Z-80 card software

by bobstek＠ix.netcom.com

Does anyone have the software for a Blue Thunder Z-80 card for the PC ISA bus? I would like to get my hands on a copy. Thanks. Bob Stek bobstek(a)ix.netcom.com Saver of Lost SOLs

27 years

PDP-8 on e-bay

by dogas＠leading.net

<rant> Ok, maybe its just me. I'm a conniving, sniviling, wheez who would probably step on my own mother to get at a cool computer (on my good days) and I spend alot of time raking though the ebayish trash to come across something tastey in a dark passed over corner of the sale. And just when you think you got a line on something, some damn smaraitan decides to post a billboard.... (no offense) </rant> I certainly don't mind those posts when they fall into the context of a discussion somewhat beyond 'Hey, everyone look...' I can understand publishing/reflecting a sale post that didn't come from public arena like ebay but I think anyone interested is capable of investing their own time searching for the things they want to aquire from that venue. Thanks, sorry - Mike: dogas(a)leading.net

27 years

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test-drb January 1999