test-drb

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101090 discussions

by allisonp＠world.std.com

<A question occurred to me today : Can you have an embedded analogue <computer, and if so, how many op-amps are needed to have one? Yes, and that's very common. None, a low pass filter(RC) performs a function and can be considered analogue. <I was looking at the service manual for my Micropolis 1203 hard disk, and <I read the circuit description of the servo electronics. It's a fairly <complicated array of op-amps, which combine integral and differential <forms of the position error, positioner current, etc. I would claim that <is an embedded analogue computer. Valid claim, also a good example of a fairly complex function. <On the other hand, I think it would be stretching the definition to call <a simple op-amp wired as a voltage follower an analogue computer. Correct. However often the buffer is between some function or follows one so it's part of the analog system. Other analog systems common to computers: cassette IO (low pass filter on output) and complex filter/differentiator edge/peak detectors for input. Some of the acients used PLLs for clock recovery (KANSAS City is one). Analog to digital conversion (quantification). Digtial to analog conversion (filtering) Disk/tape systems have several layers of analog function for data and control. Allison

28 years, 3 months

Compaq laptop dock FS/Trade

by rhblake＠bbtel.com

Ok Compaq laptop owners (you know who you are). I have a near new unit to sell or trade as follows: Compaq 2815 Desktop Expansion Base. Looks a lot like the Prolinea line of desktops with a special lid to slide your laptop machine into a "bay". It has no drives (blanking plates) but has an internal contrller for floppy or hard disk and the empty bays. Has a token ring card now in one of the two ISA slots. Includes ports for VGA, LPT, COM, KB and mouse. Has an A/B switch on the rear that I really have no idea of it's use. This is like brand new but has no manuals. Looking for $100 cash or will consider trades of items such as memory, cdroms, sound cards (especially MCA PS/2 types), etc or a complete Snappy 3/3 Deluxe setup. I will also consider equal value electronics test equipment in trade especially function generators, signal generators, frequency counters, Fluke DMMs, etc. Email me direct please. -------------------------------------------------------------------- Russ Blakeman RB Custom Services / Rt. 1 Box 62E / Harned, KY USA 40144 Phone: (502) 756-1749 Data/Fax:(502) 756-6991 Email: rhblake(a)bbtel.com or rhblake(a)bigfoot.com Website: http://members.tripod.com/~RHBLAKE/ ICQ UIN #1714857 AOL Instant Messenger "RHBLAKEMAN" * Parts/Service/Upgrades and more for MOST Computers* --------------------------------------------------------------------

28 years, 3 months

Artistic Computers (was: Re: Lost Treasures (was: Cray-1))

by cfandt＠servtech.com

Okay, first, where do we stop with the 'was:' things as an interesting thread evolves!? There may be a limit to number of nested parentheses in a subject line! ;-) At 16:52 30-04-98 -0500, Doug Yowza <yowza(a)yowza.com> wrote: >On Thu, 30 Apr 1998, Christian Fandt wrote: > >> Thankfully, the metal/plastic boxes our old computers were made with have >> virtually no value as 'interior decorations' (yet). However, there could be >> exceptions for maybe a couple of models. I recall some list members here >> had commented upon some as being rather attractive in appearance. I haven't >> come across those yet. > >Hmm, a list of computers that look good enough to display as art? Here's >mine (most are laptops): > >IMSAI 8080 >GRiD Compass >Ampere WS1 >MINDSET PC (good enough for MOMA, anyway) >NeXT Cube >eMate 300 > >-- Doug Anybody know of a URL or printed reference to a photo of an Ampere, MINDSET or eMate machine? Heard of them and I would like to see what they're like. I have somewhere in my archives old Popular Electronics and Byte mags which I'm sure show the others on Doug's list. Those NeXT machines were indeed pleasing to look at. I wish I could find one nearby here to see up close or/and purchase. --Chris -- -- Christian Fandt, Electronic/Electrical Historian Jamestown, NY USA Member of Antique Wireless Association URL: http://www.ggw.org/freenet/a/awa/

28 years, 3 months

Artistic Computers (was: Re: Lost Treasures (was: Cray-1))

by photze＠batelco.com.bh

>I'm actually keen on the contemporary Compaq designs and the cool Acer >designs with the neon colors and artistically drilled venting holes in the >dense pattern. Yep, those are cool. Also, I also kind of like the Toshiba's, the ones with those cool monitor/TV/speakers, and the box is awsome, too. And that new Toshiba model... the one in PC Week... the one that has that "30 second motherboard change", is finally a smart design, if not artistically pleasing. >Sam Alternate e-mail: dastar(a)siconic.com >--------------------------------------------------------------------------- ---- >Don't blame me...I voted for Satan. > > Coming in September...Vintage Computer Festival 2.0 > See http://www.siconic.com/vcf for details! > [Last web page update: 04/25/98] -Tim D. Hotze

28 years, 3 months

Soviet Computer on the web

by dastar＠wco.com

I was going to post this when it was still relevant within the context of the thread but anyway.... Here's a web page with some pictures and information about a pretty fascinating Soviet mainframe: http://www.mailcom.com/besm6 Sam Alternate e-mail: dastar(a)siconic.com ------------------------------------------------------------------------------- Don't blame me...I voted for Satan. Coming in September...Vintage Computer Festival 2.0 See http://www.siconic.com/vcf for details! [Last web page update: 04/25/98]

28 years, 3 months

Artistic Computers (was: Re: Lost Treasures (was: Cray-1))

by photze＠batelco.com.bh

What about the Monorail PC's (http://www.monorail.com)? Tim D. Hotze -----Original Message----- From: R. Stricklin (kjaeros) <red(a)bears.org> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Saturday, May 02, 1998 7:58 AM Subject: Re: Artistic Computers (was: Re: Lost Treasures (was: Cray-1)) >On Fri, 1 May 1998, William Donzelli wrote: > >> Speaking of which, what are the ugliest machines? > >Apollo DOMAIN computers and every last intel based PC manufactured since >1993 and _especially_ since 1995. Except the new IBM GL machines which are >actually kind of nice. > >ok >r. >

28 years, 3 months

Suicidal HDD (OT mystery)

by maxeskin＠hotmail.com

Well, the speakers are probably 6". We are playing instrumental music, nothing too heavy. Both drives were Micropolis, IDE-based, like most newer Macs. Nothing much bangs on the table, except the speaker vibrations. Could it be the Yamaha keyboard or amplifier (just regular black box) >> > >> > >> > >> > The speakers MIGHT be the problem. There is a pair of them, each >> > twice the size of an IMSAI, right beneath the macintosh >> >> I see... Now, while a lot of older drives locked the pack to the spindle >> using a fairly powerful magnet (and 3.5" floppy drives still do), I'd >> still not want to run a hard disk near speakers of that size. Can you >> rearange the layout of the room a little? >> >> -tony >> >Guys! I know of several deaf and impaired hearing people who likes >music at full blast thru regular quality 60W with subwoofer and their >hard drives cared nothing a whit about vibration level. I think >something is funny: (Thobbing of music...boom boom bop...) > >1. Did someone disconnect/connect scsi stuff often? >2. Did something bang the table where Mac sits often? >3. Specific brands is no better than some and why didn't Max give us >what kind of both toasted hds was? >4. Termination issues sometimes cooks the hd especially selection of >termination power used. >5. Sharp resonanent sounds sometimes can make the pc chassis >resosate thus killing hd life early. That does means to some >machines with plastic chassis and some that will resnsonate, shaking >the hd long and often. Push and pull on that hard drive bay to see >how much it can shift or "pluck" it to see if it does vibrate. > >Magnetic field have nearly no effect on hd's inside that steel boxes >unless Apple used plastic shell with thin tin sheets which that >requires you to remove either speakers or the pc to different >location at least 6" to 3 feet away. >Magnetic field strength falls away at logithmic rate with increaseing >distrance from the source. > >Jaosn D. > >> > ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

28 years, 3 months

kaypro<->IBM?

by SUPRDAVE＠aol.com

ive been in communication with a lady that has an old kaypro with a lot of text files on disk she wants to transfer to an IBM for further editing and safekeeping. i presume i need to cable their serial ports up and transfer that way, but exactly how? i need some sort of program to send the files on the kaypro i guess, but have nothing to do it with. if i can do this file transfer, i'll get two working kaypros, a TI word processor from 1985 and some NLQ dot matrix printer shipped to me free. david

28 years, 3 months

Introduction

by rax＠warbaby.com

Hi All - Just joined the list - looks like a great resource for information. I've been collecting vintage micros for a couple of years now and only recently discovered there were other fools with the same bad habit. Currently I've got about 50 assorted Commodores, half-dozen Apple ]['s, two Kaypros, an Osborne Executive, a TRS-80, a couple of TI-99's, a bunch of Atari, Coleco and other game machines, and the rest of the garage is filled with boxes of tape drives, modems, printers and other peripheral stuff. I'm always interested in trading, so if there's something you need, let me know. I'll go back to lurking now. R. BTW - I've been compiling a chronological list of every computer ever made for a book that I'm working on - big stuff as well as micros. It's a pretty big file, but I'll post it (as a MS Word attachment?) if anyone is interested. -- Robert Arnold Managing Editor The MonkeyPool WebSite Content Development http://www.monkeypool.com Creator and Eminence Grise Warbaby: The WebSite. The Domain. The Empire. muahahahahaaaaa http://www.warbaby.com Dreadlocks on white boys give me the willies.

28 years, 3 months

For you TI 99/4 collectors out there

by bill_r＠inetnebr.com

For you TI 99/4 collectors out there: >"Bill Frandsen" <bfrandse(a)rrnet.com> >I have the following package for auction on the eBay auction web site. It >ends in less than 24 hours. The current bid is $1.00, but it does have a >reserve price that has not been met. A picture is included at the following >link where you can also place your bid. > >http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=11843202 > >Set of 3 Different TI 99/4A Computers >One each of the major shell + keyboard revisions > >Includes 3 shell types: 1 Cream colored and 2 Black + Silver colored. >1 black + silver unit has a "Solid State Software" emblem under the cart >slot. >The other black + silver unit has different keyboard lettering and help >bezel. >Also includes 3 slightly different styles of working power supplies. >Will include 4 NON-WORKING RF Video Modulators (may be fixable?). >Also includes keyboard help reference strips and some blank strips. >All units have been cleaned and tested and work fine, however, >you will need a working RF Video Modulator or video cable to use them. > > >Thanks for your interest! > -Bill Richman bill_r(a)inetnebr.com http://incolor.inetnebr.com/bill_r (Home of the COSMAC Elf Simulator!)

28 years, 3 months

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