- test-drb@ccmp.vtda.org - classiccmp.org

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, 1 month

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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, 1 month

2
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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, 1 month

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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, 1 month

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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, 1 month

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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, 1 month

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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, 1 month

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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, 1 month

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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, 1 month

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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, 1 month

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Suicidal HDD (OT mystery)

by maxeskin＠hotmail.com

Well, I guess I got my answer, so, if I may inquire, why is it that older hard drives did not need a clean room? Were they sufficiently rought that you could just pull them apart? >> distance? Is there a way to block their effects, using metal, for > >Well, mu-metal would be a reasonable screen, but it's not cheap and can't >be bent to shape after annealing. A larger room might well be cheaper! > >> example? Can I fix the broken drives? > >If it's magnetic damage to the servo information, then it's almost >impossible to repair. You'd need a clean room and the rig used to write >the information at the factory. I don't think many hobbyists have that >sort of setup. > >The other suggestion was mechanical damage from vibration. This might be >more likely, actually. Repairing that (which would be similar to a minor >headcrash) is going to be impossible as well. > >In general even _I_ class modern hard drives as being impossible to >repair. I'll do electronic repairs on the older winchesters (but modern >drives are all custom chips, so that's impossible now), and I'll repair >demountables with no problems at all. But I don't have a clean room to >dismantle the HDA (yet!) > >-tony > > ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

28 years, 1 month

2
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Suicidal HDD (OT mystery)

by maxeskin＠hotmail.com

This room is about the size of a porta-potty. What would be a safe distance? Is there a way to block their effects, using metal, for example? Can I fix the broken drives? >> 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 > > ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

28 years, 1 month

2
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Lost Treasures (was: Cray-1)

by maxeskin＠hotmail.com

Well, Lisas are essentially the same case... > > ><Actually, the VT100 does have a rather nice look to it. If you insist ><that only computers go on the above list, I'll list it as a VT103. > >If it has to be a computer bow about a VT180 (CP/M) or PDT-11/130? > >Allison > > ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

28 years, 1 month

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This sucks.

by DSEAGRAV＠toad.xkl.com

Well, the KS-10 deal went over like a lead baloon... It seems the HARDWARE to the system has already been packed off to Caterpillar Spares. But the SYSTEM (disk) is still there. THAT is what they were melting down. Not the whole rack, just the RP06 packs that had their data. When I was told the SYSTEM was intact and may be rescueable, we assumed the HARDWARE. When I asked about config, he assumed I meant "What's the monitor built for?" And they don't wanna give me those disks anyway. Basically, I went in and made a fool of myself... Oh well. Live and learn... -------

28 years, 1 month

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Introduction

by Philip.Belben＠powertech.co.uk

Tony Duell wrote: >> Heck, I'd like to see a good computer taxonomy (you know, kingdom=digital, >> phylum=silicon, class=portable, order=laptop, family=grid, >> genus=1500-series, species=1535-EXP). > > On the grounds that all laptops are portables, I think I'd rather see > something like > > kingdom = {analogue, digital, quantum} > Phylum = {silicon, GaAs, Germanium (?), hollow-state, mechanical} > Class = {Mainframe, Mini, Workstation, Micro} > Order = {Rackmount, deskside, desktop, luggable, laptop, notebook, palmtop} > > (I know of at least one luggable mini, and I think a Sparcbook could > reasonably be called a laptop workstation) Ummm. Given the number of hybrids around (as we have seen from more recent posts), your system might be better. But AFAIK in the taxonomy used by biologists etc. the list of available classes is different for each phylum, the list of available orders different for each class, etc. But I have a computer that is hybrid analogue/digital (an EAI-1000, I think it's called, which is an analogue computer with a microprocessor doing an embedded control type job to run the system)... Philip. PS Luggable Mini = P850?

28 years, 1 month

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Anyone know where to find a Setup disk for Epson Equity II+?

by lfb107＠psu.edu

At 07:15 AM 5/1/98 -0700, Daniel A. Seagraves wrote: >One of ours lost it's CMOS. >------- Here's a zip of one. At one time it was available off of the Epson web page but I'm not sure if it still is. Anyway, it works for both II+ and III model Epsons. Enjoy! Les

28 years, 1 month

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Anyone know where to find a Setup disk for Epson Equity II+?

by DSEAGRAV＠toad.xkl.com

One of ours lost it's CMOS. -------

28 years, 1 month

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XT Power Supply help... (More Info)

by photze＠batelco.com.bh

OK... by some act of God, when I try to plug in the HDD alone, it spins up, along with the PSU. Now, when I take EVERYTHING out, that includes drives, cards, etc. and just give the motherboard power, it doesn't spin up at all. Yes, the black pins are in the middle, I know I've got a good connection... could this be the "No power" line thingy? Should a real-XT case work with a clone-XT motherboard? Thanks, Tim D. Hotze -----Original Message----- From: Tony Duell <ard(a)p850ug1.demon.co.uk> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Friday, May 01, 1998 3:13 AM Subject: Re: XT Power Supply help... >> I've gone as far as epoxying a screw upside down onto the odd "security" screws >> way back when they started coming out and used a pliers/visegrips to turn the > >Or filing a nail to make a tool to fit some of the more obscure screws. > >If it has a head that stands proud of the surface, and if you don't care >about mangling the screw, then use a hacksaw to cut a slot in it. I got a >pile of AT bits at a radio rally, and that's what had been done to the >screws in the PSU. > >> > not to put a nail in the fuseholder, or put unsafe components in the >> > chopper circuit, or whatever. >> >> Uh, penny under the blown screw in fuse, cigarette pack foil around the blown AGC >> fuse. Let's do this right now. > >It's a well-known fact that to the UK public all fuses are 13A (the >standard/maximum one used in our mains plugs). I've seen said fuses in >all sorts of places that they don't belong. > >I've also seen the fuse wrapped in foil - where on earth does that >dangerous trick come from. I can't believe these lusers work it out for >themselves. > >-tony >

28 years, 1 month

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Computer Taxonomy

by allisonp＠world.std.com

<However, some of the very simple controllers in, e.g., lawn sprinkler <timers, etc. could possibly be classified as just programmable logic <elements -not really "computers". I can imagine a simple Epson or whateve <clock chip and a small programmable array logic (PAL) chip of some low co <type being setup with very simple I/O to act as the "programmable" contro <in those types of equipment. Or, rather, an application specific <integrated circuit or ASIC could be specially designed and fabricated to <replace all of this if production quantities are in the many thousands. <Still, no microprocessor chip though. This is not true, many VCRs have version of the NEC ucom75 chips, cmos single chip microprocessor(512b-2kb rom, 128nybbles of ram(max) lots of IO for various purposes). The TI1000 series were used in games and Microwave ovens. Most of the things like lawn spriklers controllers are chips like 8048/9, PIC, or other cheap in volume mask rom single chips micros. The list can go on but true ASICs are expensive to develope and limited in scope. There are an abundance of small very low cost single chip micros that can do tasks like those described. FYI what does seperate most of these from the general taxonomic classes is that the "program" is inaccessable on most of these so altering it is unlikely to impossible. Allison

28 years, 1 month

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Computer Taxonomy

by peacock＠simconv.com

> It would be tough (but valuable) to provide a truly comprehensive list. kingdom = {analogue, digital, quantum} Phylum = {silicon, GaAs, Germanium (?), hollow-state, mechanical} Class = {Mainframe, Mini, Workstation, Micro} Order = {Rackmount, deskside, desktop, luggable, laptop, notebook, palmtop} You are leaving out whole categories of computers. Where do VCR and microwave oven controllers fit in? How do you fit in user programmable and non-user programmable? What about digital storage scopes, logic analyzers? What about lawn sprinkler timers, aren't they "programmable"? Jack Peacock

28 years, 1 month

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Lost Treasures (was: Cray-1)

by Marty＠itgonline.com

Funny you should mention the Macquarium. Yesterday on my way home I stopped at a used computer store and found a Mac Plus Macquarium with the original documentation dated 1992 (a mere $60.00 for a butchered Mac... I wouldn't buy one because I don't think it's cute and don't want to encourage this practice). The top of the case had been quite roughly gouged out, a glass tank fitted inside the case. I'd seen this on the web before but thought it was a joke..... Marty ______________________________ Reply Separator _________________________________ Subject: Re: Lost Treasures (was: Cray-1) Author: classiccmp(a)u.washington.edu at internet Date: 4/30/98 6:45 PM On Thu, 30 Apr 1998, Doug Yowza 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 Of course you guys have heard of converting a Mac into a fish tnak? 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] ------ Message Header Follows ------ Received: from lists3.u.washington.edu by smtp.itgonline.com (PostalUnion/SMTP(tm) v2.1.9i(b5) for Windows NT(tm)) id AA-1998Apr30.184519.1767.39626; Thu, 30 Apr 1998 18:45:19 -0400 Received: from host (lists.u.washington.edu [140.142.56.13]) by lists3.u.washington.edu (8.8.4+UW97.07/8.8.4+UW97.05) with SMTP id PAA27000; Thu, 30 Apr 1998 15:38:26 -0700 Received: from mxu3.u.washington.edu (mxu3.u.washington.edu [140.142.33.7]) by lists.u.washington.edu (8.8.4+UW97.07/8.8.4+UW97.05) with ESMTP id PAA81022 for <classiccmp(a)lists.u.washington.edu>; Thu, 30 Apr 1998 15:38:21 -0700 Received: from shell.wco.com (shell.wco.com [199.4.94.16]) by mxu3.u.washington.edu (8.8.4+UW97.07/8.8.4+UW97.09) with ESMTP id PAA26284 for <classiccmp(a)u.washington.edu>; Thu, 30 Apr 1998 15:38:05 -0700 Received: from shell (dastar@shell [199.4.94.16]) by shell.wco.com (8.8.5/8.8.5/WCO-18jul97) with SMTP id PAA00153 for <classiccmp(a)u.washington.edu>; Thu, 30 Apr 1998 15:38:15 -0700 (PDT) Message-Id: <Pine.GSO.3.96.980430153749.24738C-100000@shell> Date: Thu, 30 Apr 1998 15:38:10 -0700 (PDT) Reply-To: classiccmp(a)u.washington.edu Sender: CLASSICCMP-owner(a)u.washington.edu Precedence: bulk From: Sam Ismail <dastar(a)wco.com> To: "Discussion re-collecting of classic computers" <classiccmp(a)u.washington.edu> Subject: Re: Lost Treasures (was: Cray-1) In-Reply-To: <Pine.LNX.3.95.980430164313.14283A-100000(a)behemoth.host4u.net> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> X-Sender: dastar@shell X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN

28 years, 1 month

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XT Power Supply help... (More Info)

by JRichardson＠softwright.co.uk

Hmm, must be too early... I suddenly remembered a situation like this I had with a motherboard a few years back... check the ISA slots; make sure nobody's stuck a card in there and mangled a few of the pins. This board I was given had the same trouble, and a couple of the pins were shorting out and the system was shutting it down. Nice three-second fix once I'd found the problem!! :) good luck, Jules >

28 years, 1 month

1
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Introduction

by fauradon＠pclink.com

Off Topic posts are the worst, second comes discussions about computers less than ten years old (which eventually fall in the off topic category) Try to locate the List FAQ to find out more (it doesn't list the flame war starters but if you can stick to the guidelines you'll be OK). Then again I'm not in charge of this list either. As a general rule this is a list for the discussion of more than ten year old computer equipment. Use plain text to send messages. Be nice and have fun. >Thanks for the tip. Let me know if there are any other no-no's or flame bait. > Francois ------------------------------------------------------------- Visit the Sanctuary at: http://www.pclink.com/fauradon

28 years, 1 month

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Tony Cole's Cray-1

by Philip.Belben＠powertech.co.uk

Doug: > Is the reason those old radio/phonograph boxes are not being thrown > away is that noone notice the cover and thinks it's just a pretty > dresser w/o drawers :)? Also hideaway sewing machines. :-) I doubt it... The real crime is those who buy sewing machines with pedestals and treadles, throw away the sewing machine and turn the pedestal into an olde worlde iron framed coffee table. I am told by a friend in the trade that this is v. common. > Of course, the System/36 (I think, maybe not) was built into a desk. There was a system/36 that was the size of a desk pedestal but I never saw that particular variant. The system/32 (and possibly the s/38?) had a desk built into _it_... > And then there were the teletypes (are the ones that are mostly used > as examples of teletypes ASR-33?), printers, etc. Yes. Philip.

28 years, 1 month

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Tony Cole's Cray-1

by allisonp＠world.std.com

<VU = Valve, Rectifying (don't ask me to explain that one). Unidirectional...diode for dummies. Allison

28 years, 1 month

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Lost Treasures (was: Cray-1)

by allisonp＠world.std.com

<Actually, the VT100 does have a rather nice look to it. If you insist <that only computers go on the above list, I'll list it as a VT103. If it has to be a computer bow about a VT180 (CP/M) or PDT-11/130? Allison

28 years, 1 month

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Tony Cole's Cray-1

by pete＠dunnington.u-net.com

On Apr 30, 9:40, Christian Fandt wrote: > By the way, a second, more minor problem was my wife. When I was describing > the size of the 9370 system before I brought it home, here eyes got real > big and she stated: "Just where are you going to put that!??!" This sounds familiar :-) > And when I > got two six foot tall 19"rack cabinets from an old machine controller at > work that I tore down, I temporarily set them in the new garage sometime > before we moved in. She spied them, stared at them for a few seconds and > asked "What are _those_ monstrosities?" I had to do some quick explaining Even more familair :-) > Wish I could afford a heated, insulated garage. Just leave one or two running, like I do. -- Pete Peter Turnbull Dept. of Computer Science University of York

28 years, 1 month

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Suicidal HDD (OT mystery)

by maxeskin＠hotmail.com

The speakers MIGHT be the problem. There is a pair of them, each twice the size of an IMSAI, right beneath the macintosh > >> >> I posted this a few weeks back, but noone answered, so I'll ask it >> again. > >Oh, what the heck, I'll make a few guesses... > >> There is a certain Macintosh 5400/180 at my school whose hard drive >> crashed about a month and a half ago. When it tried to start, it >> wouldn't really seek, just made a ticking noise and the LED would > >Is the disk spinning at this point? (feel the drive itself). Is it just >that the positioner is not geting the heads where they should be? > >> flash. So, we took it out, ordered another one. A few days later, >> it died the same death. So now we have another one. My ethics don't >> allow me to just put in a hard drive knowing it will be destroyed. >> What should I do? One hint is that the Macintosh is in a soundproof >> booth, and is powered from the booth, which is plugged in. But, the >> mac is plugged in via a "surge protector". >> Ideas? Could it be bad power? Any way to check? > >It _could_ be a PSU problem, but IMHO it's unlikely, unless other parts >of the mac are failing as well. If the disk is spinning and the rest of >the mac is OK, I'd not suspect power problems at this time. > >Are there any strong magnetic fields (say _large_ speakers) very close to >it? I'm wondering if the servo information on the disks is being >corrupted so the positioner can't lock onto a track. > >-tony > > ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

28 years, 1 month

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Lost Treasures (was: Cray-1)

by peacock＠simconv.com

>Some sick minded person might gut a NeXT cube and use it as >a little stool for flowers at an exhibit of abstract art ;) > In the early S-100 days (1975) the engineering lab I worked in got an early Altair (we needed small cheap computers to embed in environmental monitoring instruments). A few months later we got one of the first IMSAIs. After about 3 minutes of comparing the two, we voted to use IMSAIs and the Altair was relegated to being the doorstop for the lab doors. I assume it wound up in a surplus action some number of years after I left. BTW, the embedded controller we actually used in the instruments was a single board Intel 8080, their evaluation kit board, the precursor to Multibus. We used the IMSAIs to develop and test the code in the lab. Jack Peacock

28 years, 1 month

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Lost Treasures (was: Cray-1)

by maxeskin＠hotmail.com

Well, I recall from The Secret Guide To Computers that early Timex Sinclairs were used as doorstops at Timex (or whatever). Some sick minded person might gut a NeXT cube and use it as a little stool for flowers at an exhibit of abstract art ;) > >At 08:56 30-04-98 -0600, "Jeff Kaneko" <Jeff.Kaneko(a)ifrsys.com> wrote: >> >>> At 17:30 29-04-98 +0000, Philip.Belben(a)powertech.co.uk wrote: >>> >Doug: >>> > >>> >> Is the reason those old radio/phonograph boxes are not being thrown >>> >> away is that noone notice the cover and thinks it's just a pretty > --- snippers --- > >>> There were folks who took a late-20's/early 30's radio which was built into >>> a beautiful wooden cabinet and turned it into a piece of furniture by >>> gutting it. Then there were the late 40's and early 50's TV cabinets which >>> met the same fate. At least I've rescued several of each of these kinds of >>> receivers for my collection. >> >>Then there was this girl I was dating while I lived in Baltimore in >>the early 80's. Her dad had a vintage (early 20th cent.)'magneto' >>(u-crank-it) telephone he mounted on the wall in their basement as a >>conversation piece. He felt it was 'too heavy' so before mounting >>it he gutted the thing. So many historic relics have been destroyed >>in the name of 'interior decoration'. > >Some people have no clue. But in retrospect to that statement, those people >are probably not technically oriented like we are so there is no awareness >of anything's actual worth as a technological collectable. > >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. > > > ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

28 years, 1 month

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Production figures?

by altair8800＠hotmail.com

Does anyone know the production figures for either the Altair 8800, the Imsai 8080 or the Processor Tech SOL 20? If actual numbers are not available I would really appreciate getting an educated guess. Thanks much, Bob ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

28 years, 1 month

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FS: Mac 128

by gmast＠polymail.cpunix.calpoly.edu

I used to subscribe to this list but my mailbox couldn't take it. I guess if you'reading this, it got through. I'm selling a Mac 128 on eBay. The bid is up to about $60 and the auction ends today. If anyone is interested in it just go to the link below and bid through the auction. You will have to pay shipping so keep that in mind. 11941337: Original Macintosh! 128K / KB / FD / More! Current bid: $51.00 Auction ends on: 04/30/98 18:31:45 PDT http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=11941337 I also have another 128 that seems to work but has a dead screen. And a pile of the external floppy drives (3 I think). Includes keyboard and mouse. Accepting offers.

28 years, 1 month

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XT Power Supply help...

by Marty＠itgonline.com

I've never seen an 80W power supply. All original IBM 5150 PC's I worked on had a 63W power supply and the IBM XT's all had a 130W power supply. You mentioned your supply has a 220V selection? If so and you are stateside, make certain it is in the 110V position. If you have a 220V power supply that doesn't have a 110V selection and you're stateside... you're out of luck. I concur with all those previous respondents that this supply of yours is most likely good but loaded down either by excessive loading (more cards/memory/drives than the P/S can service) or a short circuit in one of the add-on boards or drives. Just unload until you find the cause. Marty ______________________________ Reply Separator _________________________________ Subject: Re: XT Power Supply help... Author: classiccmp(a)u.washington.edu at internet Date: 4/29/98 11:34 PM That's odd. My power supply's 130W. It's also the 220v variety, as that's what's available here. It was made in Dublin, Ireland. It really looks like it was how it was made, as it looks REALLY built-in to the case. Anyway, I can't see any reason that it would be dememanding too much power, all I have connected is a XT clone motherboard, (however, it WAS sitting in an XT case) and a XT floppy drive connected. So, any ideas? I think that it was just this PS's time to go.... and it was two weeks one day older than I am! Thanks for the help. I might need a new PSU, as I'm not good at this type of thing. After testing it with a dummy load, just a HDD, and a FDD (one at a time), and rechecking all my power connections, I think that it REALLY is dead. Thanks, Tim D. Hotze -----Original Message----- From: SUPRDAVE <SUPRDAVE(a)aol.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Thursday, April 30, 1998 5:06 AM Subject: Re: XT Power Supply help... >In a message dated 98-04-29 16:12:26 EDT, you write: > ><< > >> Hi. After getting a new M Board for my XT and a load of cards, I >found > > >>that > > >> my Power Supply's now completely dead. So, where to I start? No fan, > > >>moves > > >> a turn or two, I know that the power connections good. > > > > Could you simply be overloading it? >> >as long as its an xt power supply and not one from a 5150 pc, there should be >no problems. the 5150 was only 63watts, which was good for maybe floppy >drives. the xt has an ~80 watt power supply so there shouldnt be any danger of >overloading unless it was dodgy to begin with. ive a loaded up xt and the >power supply handles it just fine. > >david ------ Message Header Follows ------ Received: from lists4.u.washington.edu by smtp.itgonline.com (PostalUnion/SMTP(tm) v2.1.9i(b5) for Windows NT(tm)) id AA-1998Apr29.233404.1767.39454; Wed, 29 Apr 1998 23:34:05 -0400 Received: from host (lists.u.washington.edu [140.142.56.13]) by lists4.u.washington.edu (8.8.4+UW97.07/8.8.4+UW97.05) with SMTP id UAA06172; Wed, 29 Apr 1998 20:27:07 -0700 Received: from mxu4.u.washington.edu (mxu4.u.washington.edu [140.142.33.8]) by lists.u.washington.edu (8.8.4+UW97.07/8.8.4+UW97.05) with ESMTP id UAA63124 for <classiccmp(a)lists.u.washington.edu>; Wed, 29 Apr 1998 20:27:01 -0700 Received: from sv10.batelco.com.bh (sv10.batelco.com.bh [193.188.97.227]) by mxu4.u.washington.edu (8.8.4+UW97.07/8.8.4+UW97.09) with ESMTP id UAA30480 for <classiccmp(a)u.washington.edu>; Wed, 29 Apr 1998 20:26:58 -0700 Received: from hotze ([193.188.103.36]) by sv10.batelco.com.bh (post.office MTA v1.9.3b ID# 0-13092) with SMTP id AAA21936 for <classiccmp(a)u.washington.edu>; Thu, 30 Apr 1998 06:26:53 +0300 Message-Id: <001601bd73e7$d6fd3540$2467bcc1@hotze> Date: Thu, 30 Apr 1998 06:25:48 +0300 Reply-To: classiccmp(a)u.washington.edu Sender: CLASSICCMP-owner(a)u.washington.edu Precedence: bulk From: "Hotze" <photze(a)batelco.com.bh> To: "Discussion re-collecting of classic computers" <classiccmp(a)u.washington.edu> Subject: Re: XT Power Supply help... MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-To: <classiccmp(a)u.washington.edu> X-Priority: 3 X-MSMail-Priority: Normal X-MimeOLE: Produced By Microsoft MimeOLE V4.72.2106.4 X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN

28 years, 1 month

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No subject

by bill_r＠inetnebr.com

For your consideration. As always, if you get screwed on this stuff, I will deny any knowledge of your existence. ;-) >For Sale- Collectors Items. > >Osborne 1 and Vixen Computers by owner. > >The ORIGINAL portables. > >Manuals and Software included. > >Make offer. > >Respond to Joe at joab(a)ix.nectom.com > -Bill Richman bill_r(a)inetnebr.com http://incolor.inetnebr.com/bill_r (Home of the COSMAC Elf Simulator!)

28 years, 1 month

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XT Power Supply help...

by photze＠batelco.com.bh

That's odd. My power supply's 130W. It's also the 220v variety, as that's what's available here. It was made in Dublin, Ireland. It really looks like it was how it was made, as it looks REALLY built-in to the case. Anyway, I can't see any reason that it would be dememanding too much power, all I have connected is a XT clone motherboard, (however, it WAS sitting in an XT case) and a XT floppy drive connected. So, any ideas? I think that it was just this PS's time to go.... and it was two weeks one day older than I am! Thanks for the help. I might need a new PSU, as I'm not good at this type of thing. After testing it with a dummy load, just a HDD, and a FDD (one at a time), and rechecking all my power connections, I think that it REALLY is dead. Thanks, Tim D. Hotze -----Original Message----- From: SUPRDAVE <SUPRDAVE(a)aol.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Thursday, April 30, 1998 5:06 AM Subject: Re: XT Power Supply help... >In a message dated 98-04-29 16:12:26 EDT, you write: > ><< > >> Hi. After getting a new M Board for my XT and a load of cards, I >found > > >>that > > >> my Power Supply's now completely dead. So, where to I start? No fan, > > >>moves > > >> a turn or two, I know that the power connections good. > > > > Could you simply be overloading it? >> >as long as its an xt power supply and not one from a 5150 pc, there should be >no problems. the 5150 was only 63watts, which was good for maybe floppy >drives. the xt has an ~80 watt power supply so there shouldnt be any danger of >overloading unless it was dodgy to begin with. ive a loaded up xt and the >power supply handles it just fine. > >david

28 years, 1 month

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The PC's Soviet?

by photze＠batelco.com.bh

Yep, Apple Records. Actually, it was founded by Paul Macarthney (however you spell it) and John Lenon, the Beatles. Their idea was to have people coming in, and doing what they wanted, getting profits for their records, and not having to go beg the brass at some corporation. They lost more and more money, into the 80's, when they were "eaten up" by Capitol records. The Beatles CD's available now from capitol still feature the Apple logo (not Apple Computer), and the CD's also have it. Ciao, Tim D. Hotze -----Original Message----- From: SUPRDAVE <SUPRDAVE(a)aol.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Thursday, April 30, 1998 4:10 PM Subject: Re: The PC's Soviet? >In a message dated 98-04-30 00:39:32 EDT, you write: > ><< Heck, wasn't the name "Apple" licensed from the British record company of > the same name (Apple the computer company could use the name as long as > they didn't get into the music business. . .which made things get > interesting when people started doing MIDI stuff with Macs . . .) > >> > >yea, wasnt it the beatles who had something called apple records or something >like that? i remember reading somewhere sometime long ago about the legalities >of it. obviously, apple records got precedence because they were there first. >did apple computer ever have to pay money for the resolution? > >david

28 years, 1 month

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The PC's Soviet?

by SUPRDAVE＠aol.com

In a message dated 98-04-30 00:39:32 EDT, you write: << Heck, wasn't the name "Apple" licensed from the British record company of the same name (Apple the computer company could use the name as long as they didn't get into the music business. . .which made things get interesting when people started doing MIDI stuff with Macs . . .) >> yea, wasnt it the beatles who had something called apple records or something like that? i remember reading somewhere sometime long ago about the legalities of it. obviously, apple records got precedence because they were there first. did apple computer ever have to pay money for the resolution? david

28 years, 1 month

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XT Power Supply help...

by JRichardson＠softwright.co.uk

>> > Could you simply be overloading it? >> >> as long as its an xt power supply and not one from a 5150 pc, there should >>be >> no problems. the 5150 was only 63watts, which was good for maybe floppy >> drives. the xt has an ~80 watt power supply > ... hmm, I've overloaded a standard XT (80W) supply before trying to run a couple of the original 10MB hard drives (amongst other things!). Guess it depends on what cards and stuff you're running (some of those old full-length boards drew a hell of a lot of power...) I've got an old pre-XT machine somewhere with the 63W supply, I seem to remember it wouldn't even power one 10MB drive with motherboard and a single floppy drive in place... I can't remember why on earth I even tried it though, I don't think the pre-XT machines (what was their proper title btw?) would even run a hard drive... cheers Jules

28 years, 1 month

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First speaker announced for VCF2

by Philip.Belben＠powertech.co.uk

> > Finally, Sam, could you put me on the VCF mailing list, please. I tried > > to subscribe from the web page but we've just migrated to Lusedoze Not > > Tolerable and Internut Exploder, with the result that I couldn't get it > > to work... > > Hmmmm...I thought I tested it under MSIE and it should be working. I'll > check again. If anyone else is experiencing problems with the forms > features then please let me know. Thanks for the tip. And yes, I will > add you to the notification list. To be addded to the mailing list I'll > need your physical address, unless you just want e-mail updates. Sorry, Sam, what I meant was our systems here are badly set up. And I refuse to spend hours trying to get WNT to do things properly when it's probably not capable of it. When I try to use your forms page, Internut Exploder asks for a directory in which to store outgoing e-mails and then won't accept any that I give it. (For the record, I am _not_ a computing/IT/whatever person at work - it's merely my hobby. Eventually I will get TCP/IP on one of my UNIX boxen at home and get a personal connection...) Physical address will follow by private e-mail. Philip.

28 years, 1 month

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NEC portable FS

by rhblake＠bbtel.com

I hate to flood all of you with more stuff but this machine is going unused here and collecting dust. It may be of interest to a collector or of use to someone as a Windows portable. NEC APC IV 286-10 processor, HDD, blue EGA LCD screen, CGA/EGA external monitor port, internal modem, 2.6 mb RAM on 640k system memory and AST card, serial and parallel ports, new 1.44m floppy, external "backpack" 5.25" floppy, manual, keyboard, 1 additional open 16 bit ISA slot, power cord, etc. has Windows 3.11 and DOS 6.2 loaded on HDD. . $135 US plus shipping. Excellent condition. -------------------------------------------------------------------- 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, 1 month

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Grid Laptop FS

by sinasohn＠ricochet.net

At 07:14 PM 4/28/98, you wrote: >GRID 8088 XT Laptop. Rugged Construction. 720k FDD, No HDD, 512k Mem, >SER/PAR, Plasma Screen, AC Adapter Module substitutes battery. Works >Perfectly. Good for diagnostics, automotive, marine, etc. Excellent >condition. Buyer prepays with money order or check and pays shipping. It sounds like a GridCase3. Probably worth $45 easy. That AC module is definitely worth something. If I hadn't just bought a TRS-80 m600 and a Televideo Portable PC, I'd probably go for it, but (luckily?) I already have one. Sure would like that AC Module, though! --------------------------------------------------------------------- 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/

28 years, 1 month

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Kaypro 2 update

by ds_spenc＠alcor.concordia.ca

I finally had enough time today to go to Canadian Tire and pick up a set of allen wrenches, so I finally pulled the disk drives out of my ailing Kaypro 2. I moved the resistor pack to what was formerly drive A, and swapped the jumper blocks, put everything back together... and it worked! The Kaypro 2 booted up WordStar with absolutely no problems. Now drive B (formerly drive A) can't be accessed. It gets a "Bdos Err On B: Bad Sector" on known good disks. So it's definitely the drive that's bad. Mechanically the drive seems sound, so I guess I have to assume that there's something wrong with the electronics. I haven't done a side-by-side comparison with a working Tandon drive to see if there's any obvious differences, though. Doug Spence ds_spenc(a)alcor.concordia.ca

28 years, 1 month

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The PC's Soviet?

by maxeskin＠hotmail.com

>On Wed, 22 Apr 1998, Doug Spence wrote: >> There were all kinds of small Apple cloners around, with various Apple >> variety and fruit names ("Granny Smith", "McIntosh", "Pear", etc.). The Any lawsuits there with that second item? >> Apple ][+ was the lack of the Apple logo, and usually the presence of >> lower case display (though not necessarily the shift-key mod, which my >> machine lacks). Some had additional stuff, though, like function keys and >> slightly differently shaped cases. Or maybe a different colour of >> plastic. >> >> Maybe I should start collecting Apple clones, seeing as I see them more >> frequently than actual Apples (clones were more affordable). I have seen a Franklin once, and the rest were real Apples. >I think the clones are more interesting than the real Apples at this >point. They are more varied and in most areas are less common. More >importantly they do have a historical significance. So how many of them were there (ballpark)? >> So the Soviets pirated the Apple ][, who didn't? >> >> A shame about the price, though. Why pirate the Apple if your clone is >> going to be even MORE expensive than the real thing? > So that you can sell it back to the US and make a profit! > >> BTW, my clone fell ill a while ago, and I've replaced it with a genuine >> Apple //e (the clone is back in its original box). Thanks to >> depreciation, the //e was *much* less expensive than the clone was. And >> it even had an additional 256K RAM card in it (now populated up to 512K). >> :) >> >> Too bad the //e won't work with any of my Z80 cards. :/ > There has been a Z-80 card made for the Apple //c, which plugged into the processor socket. Has anyone seen it? I only saw it in a catalog. > >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: 04/13/98] > > ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

28 years, 1 month

4
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XT Power Supply help...

by SUPRDAVE＠aol.com

In a message dated 98-04-29 09:23:09 EDT, you write: << Hi. After getting a new M Board for my XT and a load of cards, I found that my Power Supply's now completely dead. So, where to I start? No fan, moves a turn or two, I know that the power connections good. Thanks, >> heres a quick and dirty way to test one: if you have a hard drive, plug that into one of the power connectors, then hit the switch. that will let you know if its working or not. this test will work, as i use an xt supply just to run a scsi drive for my mac when i bring it out for testing once in a while. if not working, i have several extra xt supplies i need to get rid of. message me privately if interested. david

28 years, 1 month

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Kickstart and Workbench 1.2 for Amiga 1000

by jfoust＠threedee.com

"James L. Rice" <jrice(a)texoma.net> wrote: >I've acquired a Amiga 1000 with monitor, mouse, scsi sidecar that try's >to boot up, but after booting kickstart, it asks for the Workbench 1.2 >disk. My disk seems to be defective because the drive cycles and the >picture of the workbench disk comes back up. Does anyone out there have >a copy? The symptoms you describe could also mean that your disk drive is out of alignment. Early Amiga OSes were floppy-bound and did a lot of gronking, which wore out a lot of drives. - John Jefferson Computer Museum <http://www.threedee.com/jcm>

28 years, 1 month

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Tony Cole's Cray-1

by Philip.Belben＠powertech.co.uk

William Donzelli: > I do not think the Cray-1s used 10K ECL - I believe they were custom parts > and were faster (10K gates have a delay around 2 nS). Only four types of > chips were used in the whole beast - I think two were OR/NOR gates, one > was a flip-flop, and the other RAM. It is some years since I looked at the Cray 1 in the Deutches Museum in Muenchen (Munich), but I distinctly recall seeing lots of 10xxx chips in it. I remember I had just been given a board from the CPU of a Cyber two-hunderd-and-something (?) that had been thrown out by Muenchen Technical University a few months earlier, and this board has lots of 100xxx chips on it. Philip.

28 years, 1 month

2
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Suicidal HDD (OT mystery)

by maxeskin＠hotmail.com

I posted this a few weeks back, but noone answered, so I'll ask it again. There is a certain Macintosh 5400/180 at my school whose hard drive crashed about a month and a half ago. When it tried to start, it wouldn't really seek, just made a ticking noise and the LED would flash. So, we took it out, ordered another one. A few days later, it died the same death. So now we have another one. My ethics don't allow me to just put in a hard drive knowing it will be destroyed. What should I do? One hint is that the Macintosh is in a soundproof booth, and is powered from the booth, which is plugged in. But, the mac is plugged in via a "surge protector". Ideas? Could it be bad power? Any way to check? ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

28 years, 1 month

2
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XT Power Supply help...

by SUPRDAVE＠aol.com

In a message dated 98-04-29 16:12:26 EDT, you write: << > >> Hi. After getting a new M Board for my XT and a load of cards, I found > >>that > >> my Power Supply's now completely dead. So, where to I start? No fan, > >>moves > >> a turn or two, I know that the power connections good. > > Could you simply be overloading it? >> as long as its an xt power supply and not one from a 5150 pc, there should be no problems. the 5150 was only 63watts, which was good for maybe floppy drives. the xt has an ~80 watt power supply so there shouldnt be any danger of overloading unless it was dodgy to begin with. ive a loaded up xt and the power supply handles it just fine. david

28 years, 1 month

4
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Amstrad PPC640 mains adapter

by ard＠p850ug1.demon.co.uk

A non-text attachment was scrubbed... Name: not available Type: text Size: 1246 bytes Desc: not available Url : http://www.classiccmp.org/pipermail/cctalk/attachments/19980429/2baee4ff/at…

28 years, 1 month

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XT Power Supply help...

by JRichardson＠softwright.co.uk

>> Hi. After getting a new M Board for my XT and a load of cards, I found >>that >> my Power Supply's now completely dead. So, where to I start? No fan, >>moves >> a turn or two, I know that the power connections good. Could you simply be overloading it? Seem to remember original IBM XT supplies do this when there's too much load on the system - does the supply seem to work without anything connected to it? The fan should at least spin then... It's equally likely that one of the cards you've got, or the motherboard itself is faulty in some way and is causing the supply to shut down. If you've got a voltmeter try checking the output voltages. Final possibility: did XT supplies have a "power good" reference line that the motherboard tied to +12V to signal that everything was Ok? Can't remember if this was only AT systems that provided this. If they did it may be that your new board doesn't provide it but the power supply expects it to (wait for someone else's words of wisdom I guess, been a while since I've fiddled with these things - if that is the cause though you should be able to simply tie the line to +12V and then everything should work... :) cheers Jules > >

28 years, 1 month

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