test-drb

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101090 discussions

by ddameron＠earthlink.net

Hi Sam and all, At 09:16 PM 10/9/98 -0700, you wrote: >Speeaking of which, I found an interesting Intersil board at a vermin >market (cheezier than a flea market) the other day. The silk screen mask >on the board says "ICM 7235/36 EV/KIT". It has a 40-pin socket (empty) >and two 14-pin sockets (empty) and a glass-enclosed LCD display that has >the following format: 188:8.8 (so in other words it has one digit with >only two segments, then 4 digits with all 7 segments and a colon and >period). I can't figure out what the display would be used for. It has >an edge connector for whatever purpose. Anyone know what this is? I wish >I had a damn digital camera already so I could get a picture of this to > An Intersil 7235 is a 4 digit vacuum fluorescent driver chip, 40 pins. Input = mux. BCD/hex data. A 7236 is a 4 1/2 digit counter with a vacuum fluorescent driver like the 7235. Interesting that they have a common eval. board, my old Intersil cat. just says an evaluation kit is available for each one (separate numbers). -Dave

27 years, 11 months

Book Review: A Guide To Collecting Computers ...

by fauradon＠pclink.com

>Buy the book! I wish more collectors would start offering services that >target other collectors (like Jim W's IMSAI parts supply). Who will be >first to offer an old computer manual reprint service? (Similar services >seem to be popular in the ham radio community.) >-- Doug I thought WE were already doind that! Aren't WE? Francois ------------------------------------------------------------- Visit the desperately in need of update Sanctuary at: http://www.pclink.com/fauradon

27 years, 11 months

Hayes Bankruptcy

by rcini＠email.msn.com

This is the *second* bankruptcy for Hayes in 5 years. The last was in 1994 (emergence in 1996, I think). Maybe it's time to let someone else take a shot at running the company? Rich Cini/WUGNET - ClubWin!/CW7 - MCP Windows 95/Windows Networking - Collector of "classic" computers <========= reply separator ==========>

27 years, 11 months

FS: Hewlett Packard 90 Meter DDS Data Cartridges

by oajones＠bright.net

I have a unopened box of Hewlett Packard 90 meter DDS Data Catridges (5 cartridges, 2 Gbytes before compression). I'm asking $10 plus shipping. Send me email if you are interested. --Alan -- Computing since: 1982, VIC-20, CoCo, PC, CP/M Military Computers: COMTRAN 10, Nida 250 Amateur Radio since: 1971, WN8JEF, KA6EXR, N8BGR, AA4ZI BASIC, dBASE, Assembly, C++ mailto: oajones(a)bright.net

27 years, 11 months

Corrections to trivia

by dastar＠ncal.verio.com

On Tue, 6 Oct 1998, Doug Yowza wrote: > Babbage was not the first to come up with the idea of a computer, but you > can trace the development of modern computers back to him. You can't do > anything like that with Holt's chip -- it had no influence. Maybe there > were other Big Bangs before The Big Bang, but if they didn't create a > Universe, nobody cares. I think this attitude in general carelessly disregards an amazing body of work. In fact, I think people do care. I'm not so quick to sweep historical facts underneath the carpet simply as a matter of convenience. I'd rather know the complete and true story, and not just the easiest one to remember. Furthermore, you are are discounting the AMI microprocessors of the early 70s, which Holt went on to design after the F14 CADC, and the influence those chips may have had on later designs. In fact, you are choosing to go along with the popular history written years ago by a biased reporter that is perpetuated by lazy historians who simply regurgitate the information they read in the last book rather than doing real research and finding out there was more to the story, and that there is history before the popular history. The picture is bigger than the canvas it was painted on. I want to know what was beyond the frame. I'm surprised you have this attitude when on the one hand you'd like to see the HP9830 recognized as the first personal computer, rather than the Altair 8800. By your own reasoning, the HP9830 wasn't the big bang, so who cares? Sam Alternate e-mail: dastar(a)siconic.com ------------------------------------------------------------------------------- Ever onward. Coming in 1999: Vintage Computer Festival 3.0 See http://www.vintage.org/vcf for details! [Last web site update: 09/21/98]

27 years, 11 months

Hayes

by maxeskin＠hotmail.com

When was the last time? > >Again? > >George > >========================================================= >George L. Rachor george(a)racsys.rt.rain.com >Beaverton, Oregon http://racsys.rt.rain.com > >On Fri, 9 Oct 1998, Max Eskin wrote: > >> >> Just so everyone knows, Hayes has filed for Bankruptcy.. >> >> ______________________________________________________ >> Get Your Private, Free Email at http://www.hotmail.com >> > > ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

27 years, 11 months

Internet Question

by allisonp＠world.std.com

< Does anyone remember the cost of internet access/online time via Compuse < in the 80s ? I need to give a comparison of today's cost of sending a < graphics file. 1984 300 baud was 12.50hr connect time. 1986 1200baud was 12.50hr 1991 1200baud was 9.50hr 1994 2400 6.00hr I may be off some, it's a memory test. Compared to now, very expensive and graphic files were rarely sent before 86ish though there were up/downloads. Oh, internet mail was 1990 and roughly $0.15 a page additional I don't think sending binaries were possible then. Allison

27 years, 11 months

TRS-80 Model 100 (was Re: Convergent Technologies workSlate)

by sinasohn＠ricochet.net

At 12:08 AM 10/8/98 -0400, you wrote: >The mention in this thread of a Kyocera-labeled product intrigues me, >as I'd never heard of such at the edge of the Pacific I was on then. The Kyocera KC-85 is well known, although not too common. The case is shaped more like the NEC, but it has the keyboard of the m100. P.S., come to VCF 3.0 and see all the variations (hopefully!) and check out the talk I'm going to do (hopefully!) on the history of all these machines. (If anyone has any info, history, or anecdotes, please get in touch!) --------------------------------------------------------------------- O- Uncle Roger "There is pleasure pure in being mad roger(a)sinasohn.com that none but madmen know." Roger Louis Sinasohn & Associates San Francisco, California http://www.sinasohn.com/

27 years, 11 months

Top 10 sins of a computer scrapper

by sinasohn＠ricochet.net

At 04:07 AM 10/7/98 EDT, you wrote: >Chameleon, I may have a manual or two. If you do, would you be interested in getting rid of them? --------------------------------------------------------------------- O- Uncle Roger "There is pleasure pure in being mad roger(a)sinasohn.com that none but madmen know." Roger Louis Sinasohn & Associates San Francisco, California http://www.sinasohn.com/

27 years, 11 months

Current Tracers

by jeff.kaneko＠juno.com

Oh yeah, these things are like, mondo-cool. Generally, the logic pulser and current tracer are used together. A common failure mode for TTL and CMOS devices is you'll have a node in a circuit stuck low. Okay, you have a source driving two or more inputs. Who's weighing everything down? With the circuit in some steady state, start the pulser pulsing, and apply it to the pin that's the source. Place the tip of the current tracer on the trace that the source is attached to, and adjust the sensitivity control until the indicator light has some intensity. I think the light will blink at some intensity when it's set right-- Anyway, run the probe tip along the trace. If the light goes out, or goes dim, you passed the branch to where you pulses are going. You follow the pulses until you end up at the bad device and seriously impress the hell out of anybody watching. Why are these things so expensive? The element at the tip is an *EXTREMELY* sensitive hall-effect device, it's polarized (notice the little dot on the tip), and it's a seriously intense analog instrument in a teeny-weenie little package. But probably mostly because some people will pay just about anything for anything that's made by hp (nobody ever got fired for buying an HP product over something else). Anyway, so that's the low-down on current tracing (well, as good as I can remember, anyway). For random-logic, you just cant beat it. I think I still have an old applications bulletin around here someplace. . . . Jeff On Fri, 09 Oct 1998 18:08:32 -0700 Bruce Lane <kyrrin(a)jps.net> writes: >At 14:40 09-10-98 -0500, you wrote: > >>Holy smokes! You're right! They're not in the 1998 catalog, but I >found >>them in the 1996 catalog: HP-547A Current Tracer-- $975 ! > > <eep!> > > My God... I just double-checked the model number on mine. > > Yep... 547A. Geez, and I though the Data I/O UniSite I got a >few years ago >was a coup! > > What makes the darn things so expensive? For that matter, what >are some of >the uses for it? I got it mainly as a curiousity, and as part of the >purchase of my logic pulser, but if the thing is one of those Really >Useful >but Obscure tools, I'd like to know about it. > > >-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- >Bruce Lane, Owner and head honcho, Blue Feather Technologies >(Hamateur: WD6EOS) (E-mail: kyrrin(a)jps.net) (Web: >http://table.jps.net/~kyrrin) >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..." > ___________________________________________________________________ You don't need to buy Internet access to use free Internet e-mail. Get completely free e-mail from Juno at http://www.juno.com or call Juno at (800) 654-JUNO [654-5866]

27 years, 11 months

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