January 2002 - test-drb@ccmp.vtda.org

by pat＠purdueriots.com

I just got a pair of SSDD 8" Control Data disk drives, and was wondering if anyone had any information about them. Here's the info I can figure out from the drive: 1) Spindle motor has a 3 pin molex connector, is rated 120V, 0.77A at 60Hz 2) 2pin next to a 4pin power connector 'J7' on the logic board 3) 50pin data connector (Can't be scsi, can it?) 4) empty 16pin DIP socket 5) 8 switch DIP switch "Magnetic Peripherals Inc. a subsidiary of CONTROL DATA CORPORATION" label with 120V ratings: Equip. Ident. No. BK8A2A (could be BR8A2A) Series Code 09 Part Number 75744025 Serial Number 127888 Label on opposite side: Flexible Diskette Driver Educational Computer Corp Orlando, Floriday MFG PART NO: 910024000-009 MFG SERIAL NO: 127888 There's a bunch more numbers stamped on the drive pieces, but I'm guessing that they won't be of much use unless I want to build a new drive >from scratch (after getting in a time machine to go back 20-25 years). Thanks for the help! -- Pat

23 years, 6 months

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Creating PDF's from scanned image files

by mranalog＠attbi.com

I'm getting closer to a real PDF file!!! <<<<GROUP 4 FAX TIFF>>>>>>> First, here is my notes on converting an JPG image to a G4 TIF image in Windows: ------ Converting to G4 TIF -------------- In Win95/98/NT, path to follow is: Start -> Programs -> Accessories -> Imaging In Win95, the program is called Wang Imaging and is usually found in c:\windows\wangimg.exe. In Win 98, the program is called Kodak Imaging and is usually found in c:\windows\kodakimg.exe. In Win NT, the program is called Wang Imaging and is usually found in c:\Program Files\Windows NT\Accessories\ImageVue\wangimg.exe. Now since I'm running Win98, the following is dealing with Kodak Imaging. After kodakimg.exe starts I load a .JPG file: File -> Open In my example the file is 8.5x11 300dpi 8bit(256 shades) grayscale. Then I copy the file to the scrapbook: Edit -> Copy Page Then I create a NEW image with G4 compression: File -> New *File Type tab - check "TIFF document(TIFF)" *Compression tab - Pull down "Compression" and select "CCITT Group 4 (2d) fax". (This changes the Color tab selection to "Black and White"). *Resolution tab - I set pull down "Resolution" to "300 x 300 dpi". *Size tab - Defaults to 8.5x11 Click "OK" Then I paste the scrapbook image into the NEW image: Edit -> Paste The 8bit gray image is now a bitmap. You can check the image's properties at any time: Page -> Properties Then just save the file: File -> Save As Set the filename and click "Save" --------------------------------------------------- This converted a 2,851KB 8bit JPEG to a 448KB bitmap TIFF file. I can also scan and create multi-page TIFF files with this program. <<<<PDF FILE>>>>>>> Hans turned me onto IMG2PDF for windows (demo version on the Web). But I must have screwed up the installation. It produced a 6 page PDF file but the pages were all blank and the file was 4K in size!! Now I downloaded the demo version of TIF2PDF from the same company (Excel Info Tech, Inc.). The program installed fine and it created a beautiful 6 page PDF file that is 1,669K (Much better that 15MB). The problem is that the demo version inserts "Copyright of Excel Info Tech, Inc." in red across each page of the PDF!!! And for some reason it insert the pages in the order 2,3,4,5,1,6. If I create a three page PDF, it inserts the pages in the order 2,1,3. Regards, --Doug ========================================= Doug Coward @ home in Poulsbo, WA Analog Computer Online Museum and History Center http://dcoward.best.vwh.net/analog Analogrechner, calculateur analogique, calcolatore analogico, analoogrekenaar, komputer analogowy, analog bilgisayar, kampiutere ghiyasi, analoge computer. =========================================

23 years, 6 months

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Apple disk -> MSDOS

by mark_k＠totalise.co.uk

Hi, On Tue, 8 Jan 2002 Fred Cisin wrote: > Apple Turnover, and it's even theoretically possible to do it with the > CopyII Option board (if you are willing to write a program comparable to > the Apple OS file system. Same with Catweasel - theoretical possibility, > but significant software needed but not available. See http://www.ece.nwu.edu/~cbachman/apple.html Using a Copy II Option Board (or Deluxe Option Board) and its supplied software you can create an image file of Apple II disks. Then use the program on that page convert to a plain disk image. [About the Option Board (earlier non-ASIC model): I'll volunteer to trace the PCB of one of these as part of an effort to figure out exactly how it works. But I only have Deluxe Option Board here at the moment, which uses an ASIC.] There are free programs (source available) for extracting files from and otherwise manipulating Apple disk images; one is AFID. > If you have an Amiga, and are willing to buy or write significant > software, it can (in theory) do both Apple and PC. Free software already exists on the Amiga for reading Apple disks, and transparently reading and writing MS-DOS disks. For reading Apple disks, use the disk2file program included in this archive (which also includes an Amiga executable of the AFID program): http://us.aminet.net/pub/aminet/misc/emu/Apple2000v13.readme http://us.aminet.net/pub/aminet/misc/emu/Apple2000v13.lha Versions 2.04 and later of the Amiga OS come with CrossDOS, which allows PC (and Atari ST) floppies to be accessed transparently. A comparable package which comes with source code is MSH: http://us.aminet.net/pub/aminet/misc/emu/msh_156.readme http://us.aminet.net/pub/aminet/misc/emu/msh_156.lha > > I have a CompatiCard I and Uniform, and I still have > > Those will be nice for doing MFM diskettes. No help at all for GCR > (Apple and Commodore). An Amiga with 5.25" drive can also read Commodore 1541-type disks. One free package (which from memory includes source code) requires that the disk motor be slowed down slightly, from 300rpm to about 280 (easy enough on Commodore A1020 5.25" drives, and non-Commodore disks are still readable at that speed). http://us.aminet.net/pub/aminet/misc/emu/1541.readme http://us.aminet.net/pub/aminet/misc/emu/1541.lha All in all, an old Amiga 500 or whatever costing about US$10 can be a good investment if you need to read "strange" disk formats. An Amiga 5.25" drive should cost about the same or a little more. -- Mark

23 years, 6 months

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OT? Apple Stylewriter problems (longish)

by CLeyson＠aol.com

www.rohm.com/products/databook/tr/pdf/2sb1184.pdf for 2SB1243 data sheet. Same device, different package.

23 years, 6 months

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Screeching monitor

by alex＠linuxhacker.org

Hi, I've just been having a go at fixing an old Acorn AKF40 monitor (a few months shy of ten years old I'm afraid), which makes a screeching sound and fails to provide any display when powered up. Not having done anything like this before (I generally stick to low voltage digital stuff) I could do with a little advice. I checked for bad connections and dry joints first, then started going around with a multimeter looking for open resistors, shorted caps etc. I soon located a fault- a power resistor with a discoloured area on it which is completely open circuit. It's located somewhere in the switch mode power supply. What do you think this resistor is likely to be for, and is its failure consistent with the symptoms I'm seeing, or should I be looking for other failed parts too? Also, it says on it: 4.7 [ohm symbol] K 7W Would I be right in thinking that that means 4K7 rated to 7W? -- ------------ Alex Holden - http://www.linuxhacker.org ------------ If it doesn't work, you're not hitting it with a big enough hammer

23 years, 6 months

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Free: 3B2 OS tapes

by csmith＠amdocs.com

> -----Original Message----- > From: Bill Bradford [mailto:mrbill@mrbill.net] > I've got two QIC tapes here: > Free for the cost of postage. Surely someone has a 3b2 and needs > an OS.. Yep, but my 3B2 has a floppy drive and no tape. :/ Chris Christopher Smith, Perl Developer Amdocs - Champaign, IL /usr/bin/perl -e ' print((~"\x95\xc4\xe3"^"Just Another Perl Hacker.")."\x08!\n"); '

23 years, 6 months

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Please unsubscribe; I can't

by doc＠mdrconsult.com

Please disregard my post. Apparently screaming loudly at upper-level RoadRunner reps works wonders. We now have a DNS record, and since I can get mail on the mdrconsult account from Yahoo, it looks like they got it done and propagated in less than an hour. Still, overall, inexcusable. Doc

23 years, 6 months

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What to do with an empty BA23

by csmith＠amdocs.com

> -----Original Message----- > From: Matt London [mailto:classiccmp@knm.yi.org] > Ahh - I fear I will have to do the same for my gf, but I plan on > emigrating to canada to be with her anyway, so I won't be able to take > most of my kit. When that time comes, I'm sure classiccmp > will be able to > find good homes, unless I have to resort to ePay to get some > money for the > move :&/ Have you tried the "cute, furry animal" trick from the FAQ? :) Regards, Chris Christopher Smith, Perl Developer Amdocs - Champaign, IL /usr/bin/perl -e ' print((~"\x95\xc4\xe3"^"Just Another Perl Hacker.")."\x08!\n"); '

23 years, 6 months

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Prophylactic replacement of electrolytic capacitors?

by pete＠dunnington.u-net.com

On Jan 14, 9:45, Jerome Fine wrote: > >Pete Turnbull wrote: > > > >On Jan 13, 21:27, Louis Schulman wrote: > > > Old computer power supplies generally have big old electrolytic > > > capacitors. When these go bad, they can > > > cause real problems, and damage other components. > > > The literature indicates that many of these only have a working life of > > > 2000 hrs., or a shelf life of ten years. > > > Obviously, this will be exceeded in old computers. > > I think you may have lost a digit off the working life, Louis, at least if > > you're referring to the sort of electrolytics found in PSUs :-) > > Jerome Fine replies: > > I was hoping you would answer this question. Thank you! Of all the > hobby users around here, it seems that you have the most experience > with repairs. Oh, I don't know about that, particularly for older equipment there are a few others here who can outdo me, I think . > Now, that lost digit for the working life, I presume you mean that 20,000 > hours is more reasonable? Would that vary if the usage was 24/7 (on all > the time for the whole 20,000 hours) as opposed to being on for 10 hours > continuous once a week on average, i.e. about 50 times a year or 500 > hours a year? 20,000 hours is the top end of the range, really. 2000 is very low, though. No, 24/7 versus several hours on different occasions won't make much difference. Temperature makes a difference, becasue high temperatures make a cap dry out faster, as does the ripple current, because of internal heating (high current or high ESR). > The other MUCH BIGGER question for the stuff most of us tend to work > with is shelf life. That was estimated at 10 years. What is a reasonable > estimate? Also, more specifically, I have a number of BA23/BA123 boxes > which are about the only PSU I am concerned about for the long term. > Most are probably more than ten years old already - as far as shelf life > is concerned. Is a PSU (in general an very specifically a BA23/BA123 > box) more likely to have a longer shelf life of used every so often - any > if so, how often - once a week, month, year, decade? That will make a difference, as electrolytics tend to degrade over time. The insulator is really a thin layer of oxide on the metal foil inside, and if left sitting unused, that may dissolve. Hence the low shelf life. That's why you run long-unused electrolytics at a low voltage for a while, to reform the oxide layer. Running the PSU every so often -- once or twice a year -- will prevent that happening. With a linear supply, running it at low voltage is not too difficult -- if there's no variac handy to reduce the voltage, a low wattage (but mains voltage!) light bulb in series is a good idea. That's not a good idea with switchers, because they just try to draw more current instead, which is often worse. The ideal solution is to remove the caps and run them on a current-limited bench supply, gradually winding it up from a low voltage to the rated voltage of the capacitor. The PSUs in BA23/123 (almost all QBus machines, in fact) are switchers, BTW. > Could shelf life of some PSU also be as long as 30 years? Yes, it could, if stored under optimum conditions (but I confess I'm not sure what "optimum" would mean -- probably not too hot and dry, but not damp either) and started up periodically to make sure the caps reform. However, a blown electrolytic is easy to replace and often not hard to spot, because there's often a bulge or even a hole in the end! Or in extreme cases, an empty can where the capacitor used to be. A few years ago, I needed a non-polar electrolytic to fix an Atari monitor. The nearest equivalent I could find was the same value and voltage but physically much smaller than the original. The ripple current rating wasn't very high, either, but I didn't know what the original was rated for, so I tried it anyway. The monitor ran fine with the case off for about ten minutes, then there was a loud BANG! and small pieces of fluff floated down from the ceiling. Apparently the ripple current rating wasn't high enough :-) I replaced that one with a polyester cap in the end. -- Pete Peter Turnbull Network Manager University of York

23 years, 6 months

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Free Stuff

by charlesleecourtney＠yahoo.com

Hi all, The following are free for local pickup only (Menlo Park CA) FCFS: HP150 (original touchscreen), w/2225 printer (HP-IB, that was a mistake on my part!). Las worked when powered up several years ago. 2xDEC Pro-350s with monitors. Unknown status. 2xHP9000 840s - one with CPU and video only, 2nd with couple I/O cards. Unknown status. Thanks! Lee Courtney __________________________________________________ Do You Yahoo!? Send FREE video emails in Yahoo! Mail! http://promo.yahoo.com/videomail/

23 years, 6 months

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Tallgrass Technologies TG-1140

by doc＠mdrconsult.com

Anybody know anything about a Tallgrass Technologies TG-1140 Tape Storage System? Apparently takes 40MB cartridge tapes. The guy who has it thinks it was built about 1988. I don't have access to it, so that's all the info I have. Yeah, I know. Tony Duell has all the manuals.... :^) Doc

23 years, 6 months

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Prophylactic replacement of electrolytic capacitors?

by pete＠dunnington.u-net.com

On Jan 14, 9:39, Gary Hildebrand wrote: > IMHO, it depends mostly on who made the electrolytics. I have large > "computer grade" electrolytics from the 60's, salvaged from Ampex VTR's > that are still 100%, and have never failed in over 30 years. Not unusual... > OTOH, the cheap electrolytics found in consumer grade electronics seem > to dry out and fail on a yeary or biannual basis. One of the worst > failure rates I've seen is the teeny tiny 160VDC electrolytics; I just > replace then no matter what and usually that cures the problems. ...and also not unusual. I've seen a batch of Pentium motherboards that had a stack of small cheap electrolytics right beside/under the Slot1 processor -- and all dried out and failed within a few months. > The best way to check those #$%#$%^# caps is to use an ESR meter. And > only then should yo buckshot them. And replace them with good grade > Spraggue or CDE if possible. I've had mixed to poor resutls with > Nichion, or other cheap Japanese caps sold by MCM Electronics. > > Gary Hildebrand > -- Pete Peter Turnbull Network Manager University of York

23 years, 6 months

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Compaq LTE 5000 series, slightly OT (was: Re: Xircom NICs (wa s RE: OT: DELL SUCKS! Re: .... ))

by DAW＠yalepress3.unipress.yale.edu

! > While not quite yet a classic, one of my more favorite ! > series of laptops is the Compaq LTE 5000. It supported ! > a total of 4 pcmcia cards when it was used with a ! > docking station. These were truly unique machines IMHO, ! > and set the standards for removable cdrom and floppy ! > drives in future laptop systems. I don't know of any ! > other manufacturer at the time who offered a ! > machine with similar features. Sounds like my DockStation II for IBM Think Pads. That sucker was big, and at least half made of metal. It added 2 more PCMCIA slots, 2 ISA (or PCI) slots, included a special SCSI CD-ROM (Kodak Pkoto-CD compatible!), a full size SCSI expansion bay, an high density 50-pin SCSI connector on the back, stereo speakers, PS/2 mouse & KB connectors, printer, serial, video, audio in/out, external floppy connector... Works great with my 760EL... --- David A Woyciesjes --- C & IS Support Specialist --- Yale University Press --- mailto:david.woyciesjes@yale.edu --- (203) 432-0953 --- ICQ # - 905818

23 years, 6 months

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Free VAX 11/750 (Dallas)

by mrbill＠mrbill.net

Free 11/750 for pickup near Dallas. Please contact Alan directly if interested. Bill ----- Forwarded message from Alan Andrews <alan(a)tieless.com> ----- Subject: Re: VAX 11/750 From: Alan Andrews <alan(a)tieless.com> To: Bill Bradford <mrbill(a)mrbill.net> Date: 13 Jan 2002 13:59:55 -0600 On Sun, Jan 13, 2002 at 06:25:48AM -0600, Alan Andrews wrote: > > I know it's not a PDP 11, but I have a VAX 11/750 that's looking for a > > good home. If you know anyone interested, please pass on my email > > address. I'm in Frisco, about 20 minutes north of downtown Dallas. The 11/750 has System Industries hard drives (2 450meg and 1 350meg), disk pack, tape drive, and a DEC remote diagnostic card. I got it from the company that used it for their accounting system before switching to a client/server system in the early 90's. It's been stored in my garage for about five years. I know some of it's history, and it's in good shape, although it hasn't been turned on in ten years. It's free to a good home. ----- End forwarded message ----- -- Bill Bradford mrbill(a)mrbill.net Austin, TX

23 years, 6 months

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The STC ZEBRA and CPU meters

by dpeschel＠eskimo.com

Thread crossing alert... Since the ZEBRA used a drum for storage, most instructions had to wait for the drum to rotate into position, so one instruction takes a variable amount of time. And so the computer had a moving-needle efficiency meter on the front panel, which presumably integrated a series of pulses (similar to the circuit Tony described earlier). Or I suppose it could have divided the rate of instruction execution by the rate of drum rotation (since there was a timing track on the drum anyway). 100% efficiency was attainable but only by simple programs such as a parity check of the drum. It also had a telephone dial, sense switches, the usual memory-tweaking switches, and a register display. In the second-generation (transistor) machine, the register display was a CRT. In the first-generation (tube) machine the register display was a bunch of Magic Eye units IIRC. -- Derek

23 years, 6 months

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Prophylactic replacement of electrolytic capacitors?

by pete＠dunnington.u-net.com

On Jan 13, 21:27, Louis Schulman wrote: > Old computer power supplies generally have big old electrolytic capacitors. When these go bad, they can > cause real problems, and damage other components. > > The literature indicates that many of these only have a working life of 2000 hrs., or a shelf life of ten years. > Obviously, this will be exceeded in old computers. I think you may have lost a digit off the working life, Louis, at least if you're referring to the sort of electrolytics found in PSUs :-) > So, should these be replaced if they exceed a certain age? If it ain't broke, don't fix it. As always, there's an exception to prove the rule. If one of a pair goes, it may be worth replacing both to get the values to match. Or in some PSUs, if one or more fails, they may all have got too hot or dried out, and at least for small ones (relatively inexpensive), I tend to replace the lot. In any case, check the others, they may be on their way to join it. The working life is an estimate based on mean time between failures (MTBF). All this says is that for a large sample, it is statistically likely that a certain proprtion will fail in a certain time. Variation can be enormous. > For the screw terminal type, is it necessary to > use "computer grade" capacitors, which can be fairly expensive? Depends. The more expensive ones may differ in a few ways: -- lower ESR and/or higher ripple current tolerance. This means they won't waste so much energy (and heat up) if used in a PSU delivering a high current. -- higher temperature rating. PSUs often get rather warm, and the higher temperature rating makes them less prone to drying out. -- longer working life (related to temperature and other factors). If one can't find the right value in the right > size package, how much extra capacitance is acceptable? Electrolytics often have a wide manufacturing tolerance. -20%+50% is still not unusual. If it's just a filter capacitor I'd say up to 2x is acceptable. The real issue is likely to be cost. Also bear in mind that a capacitor of the same size but a higher capacitance may have other differences, like ripple current rating. I recently replaced a pair of 7700mfd caps in a DEC PSU; I could only get 10000mfd in the right size. In capacitor terms, that's close enough to be considered a match. > And any higher working voltage rating is OK? Yes. -- Pete Peter Turnbull Network Manager University of York

23 years, 6 months

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Atari games in limestone cavern

by Adrian.Graham＠corporatemicrosystems.com

Thanks folks :) > -----Original Message----- > From: Michael Nadeau [mailto:menadeau@mediaone.net] > Sent: 11 January 2002 23:54 > To: classiccmp(a)classiccmp.org > Subject: Re: Atari games in limestone cavern > > > It's O'Shea Ltd. at www.oshealtd.com. > > --Mike > > Michael Nadeau > Editor/Publisher > Classic Tech, the Vintage Computing Resource > www.classictechpub.com > 603-893-2379 > ----- Original Message ----- > From: "Adrian Graham" <witchy(a)binarydinosaurs.co.uk> > To: <classiccmp(a)classiccmp.org> > Sent: Friday, January 11, 2002 6:45 PM > Subject: Atari games in limestone cavern > > > > Odd subject I know, but sometime last year there was a > story of a guy in > > California (ish) who had 2 million Atari 2600/7800 games in a cavern > > somewhere and he was selling them for $2 a pop..... > > > > Anyone got a link to him? > > > > also, anyone got a spare boxed Magnavox Oddysey they'd like > to pass on > > to a UK computer museum? :) I'm talking money > here....though donations > > are always welcome! > > > > -- > > witchy/adrian > > www.binarydinosaurs.co.uk - the online computer museum > > www.snakebiteandblack.co.uk - monthly gothic shenanigans > > Linux Powered! > > > > >

23 years, 6 months

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AIM65 RAM - Help?

by mhstein＠canada.com

Does anybody have a schematic or at least the DIP switch settings for a late model AIM65 with the two 28-pin RAM/EPROM sockets (not 8 x 2114)? Help would be greatly appreciated; thanks. mike

23 years, 6 months

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Mac IIci

by Huw.Davies＠kerberos.davies.net.au

At 01:24 AM 14/01/2002 -0500, Boatman on the River of Suck wrote: >But A/UX sucks humongous hairy sweaty donkey balls. Them's fighting words :-) My first Unix workstation was a Mac IIcx running A/UX version 1.something. Given what Apple was trying to achieve this wasn't a bad first effort. Version 2 was more than usable, if you wanted you could hide most of Unix behind a Mac interface (sounds a lot like OS X to me :-). I never upgraded to A/UX version 3 (by this stage I'd moved the Mac home and had upgraded to a Personal DECstation). In all the years of hacking with the Mac I don't recall ever crashing A/UX and after a while there were lots of standard Unix applications ported across. I must admit I stopped using the finder and just started X11 but that was a personal preference. Huw Davies | e-mail: Huw.Davies(a)kerberos.davies.net.au | "If God had wanted soccer played in the | air, the sky would be painted green"

23 years, 6 months

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Mac IIci

by mythtech＠Mac.com

>Can I use my 9 pin parity simms from my old 386? The parity bits are >just ignored right? If so, then I can drop 32megs into it. I just scanned apple's TIL, and it looks as though Parity chips are ok on the IIci. I base this off an article discussing the fact that it needs FPM memory 80ns or faster (the article indicates that pretty much all 30 pin chips 80ns or faster will be FPM). It lists a few part numbers for ram upgrades offered by apple... two of them are Parity chip packages. So if apple is telling you that those are available as upgrades for the IIci, I have to assume parity memory will be just fine. And the IIci will handle a max of 128mb (8 - 16mb chips). You must install RAM in groups of 4 however (and I am fairly sure all ram in a grouped bank must be the same type, so either all parity, or all non parity) -chris <http://www.mythtech.net>

23 years, 6 months

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Mac IIci

by mythtech＠Mac.com

>It should be happy with parity. Note that some unlucky people have ended >up with a less common variant of the IIci that *requires* parity RAM. To >check if you have one of these units, look for the 'parity' label on the >motherboard and see if there is a chip there. If it is, hope you have >parity RAM on hand, because that unit will not work without it. Fortunately, >the vast preponderance of IIcis don't care what type of RAM they get. There is a similar build of the IIfx... I saw a tech note on it while perusing the TIL earlier... it seemed to imply that it was done for some government spec reason, and was only issued to government sales... but that was just implied, not actually stated, so who knows if they were released to the public as well (or if some of those government ones made it into the private sector) -chris <http://www.mythtech.net>

23 years, 6 months

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Mac IIci

by mythtech＠Mac.com

>It is also worth noting that with a full 128MB installed, the on-boot >RAM test takes a considerable amount of time, something like over two >minutes YIKES! Is the disable startup ram test option in the memory control panel as early as 7.6? or did it first appear in 8.0? (7.6.1 is the latest the IIci can handle... to check for the disable feature, open the memory control panel while holding down option, an extra choice will appear at the bottom allowing you to disable the startup ram test) -chris <http://www.mythtech.net>

23 years, 6 months

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Mac IIci

by mythtech＠Mac.com

>Does anyone know what the maximum memory you can put in a IIcx (I suspect >that >the answer is the same as a IIci). I've got a IIcx that I paid far too >much for >when it was new (say $10K) and it's only got 8Mb. If I could upgrade to >more memory >it might be worthwhile turning it on again and running A/UX (this >corresponded to >about $3K of the cost with another $2.5K being the 300Mb SCSI disk drive). 128mb For this and other bits of Mac hardware info, go to the souce and check Apple's spec list at <http://www.info.apple.com/applespec/applespec.taf>. -chris <http://www.mythtech.net>

23 years, 6 months

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Ugly Computers (Was: RE: Appropritate comic strip....)

by mythtech＠Mac.com

>It's a pity that Apple didn't decide to have wireless keyboard and mouse >for the new iMAC. That was my personal only complaint with the new iMac. If they had a wireless keyboard with built in track pad... I would have considered it perfect. (Despite that ommision, I still want one) But I figured I was just being too picky... but while sitting at my parents house this evening, I was talking about the new iMac, and my Mother of all people piped up and said they should have given it a wireless keyboard. Her only look at it was the Time magazine article, her complaint was, it was perfect for the end table, except for the "tangle of wires" needed for the keyboard and mouse. So if my mother could see this as a problem, why couldn't Jobs? -chris <http://www.mythtech.net>

23 years, 6 months

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Mac IIci

by mythtech＠Mac.com

>It is uses a 25mhz Motorola 68030 processor. What would be the >approximate Intel/PC equivalent? The 386DX-25? The 486DX-25? faster, >slower, what? I don't have much Mac experience at all. I own a Plus, >but after cleaning it, I haven't done anything with it but let it sit, >mainly because of the silly 800K drives. The 68030 and 68040 were roughly equivelent to 80386 and 80486 (respectively). Clock speed to Clock speed. There didn't start to be major differences until the PPC chip line. But frankly, that is just "rough analogy" as what you run will make huge differences in performance. The only thing that can be tough about the IIci is that is uses 30pin non parity simms, which are starting to be harder and harder to find inexpensively. The IIci *might* be able to work with parity simms, not sure (early macs could NOT, but some of the later ones IIRC could use parity or non parity) >It has a Radius video card, but unfortunately, the Radius monitor got >sold separately. It was a "Pivot" monitor. I pulled the monitor of the >nonfunctioning IIcx and the ci boots fine, and is running System 7.1. >How much should I offer? The IIci has a built in video card as well. You can use a standard Apple RGB monitor with it, or get an RGB to VGA adaptor (or I can send you the pinouts for making a good one), and use any VGA or SVGA monitor. As far as what to offer... as little as you can get away with. The machine is decent, but at this point, low end PPCs are winding up in dumpsters. So unless you WANT the IIci compared to you just want A useable mac... I wouldn't pay much more than about $10. -chris <http://www.mythtech.net>

23 years, 6 months

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Does anyone have details about the STC ZEBRA? Tony?

by mythtech＠Mac.com

>The Zebra >systems that ran Pick were produced by General Automation, not STC. Unless >of course, they were rebadged somehow. I have NO idea who made the Zebras I had. I just always remembered the name of the machine was Zebra (that and for the last month or so, I have been tripping over the manuals since they migrated from their storage shelf to the floor next to my desk for lack of room elsewhere) I DO know that they ran Pick, so if STC didn't make a Pick version of the Zebra but General Automation did, then I would have to say they were probably General Automation machines. >Well the '59 version is 6' high by 9' by 2', plus >a desk for the operator console and i/o equipment. WOA... definitely NOT the machines I had. I don't remember the exact size, but they were luggable size (large desktop PCish). Probably about 8 or 10 inches high, 18 inches or so wide, and about 36 inches long. Don't remember the weight, but I carried them to the trash, so they were manageable. Both of mine had been stacked on top of each other, and sat on a metal desk. -chris <http://www.mythtech.net>

23 years, 6 months

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WTB: TMS 4060 RAM or Equivalent

by CLeyson＠aol.com

Try Dial Electronics http://www.dialelec.com. They have TMS4060 in stock TMS4060JDL 3-4 WEEKS CALL TMS4060JL STOCK ?8.4999 $12.74985 TMS4060NL 3-4 WEEKS ?1.1199 $1.67985 Note: J suffix is ceramic package, N for plastic. Best Regards Chris Leyson

23 years, 6 months

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test - ignore

by pne.chomko＠verizon.net

>from Mac.

23 years, 6 months

1
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H744 regulator whistle

by pete＠dunnington.u-net.com

On Jan 13, 20:27, Tony Duell wrote: > Yes, it's certainly a switching regulator, and the inductor (the large > block with screw-post terminals) is needed for it to work. Don't try > shorting it out -- I am not sure what happens if you do, but I would hope > the crowbar would fire as soon as the chopper turned on and supplied > 30V-ish to the output (with no inductor, the output voltage would rise > essentially intantaneously). > > These supplies will whistle if : > > The capacitors -- particularly the output one -- have high ESR. Check or > replace them. Done. > The load is just 'wrong' (these, AFAIK, are not constant-frequency > supplies). Try adding or removing load (!). Tried that. At very light loads, the whistle almost disappears. It gets louder and the pitch changes as the load increases. The most load I've tried is a full backplane, though I'm not exactly sure what the current drawn would be. > The Inductor potting compount is breaking up. Swapping the inductors between 4 x H744 and 2 x H745 makes no apparent difference, and I expect it's unlikely they've all suffered the same fate. They came from two different machines. > Loose fixing screws can cause odd noises -- try tightening everything in > the PSU chassis. One of the first things I checked :-) I suspect, as Allison wrote, that it's just the normal noise from that type of regulator, and I'm just a bit oversensitive to it :-( Thanks for the various suggestions, everyone. I'll try putting covers on a couple of them (one already has one, and some of the other regulators do as well) and mounting them on a sheet of damping material, and learn to live with the residual noise. -- Pete Peter Turnbull Network Manager University of York

23 years, 6 months

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H744 regulator whistle

by pete＠dunnington.u-net.com

On Jan 13, 20:28, Tony Duell wrote: > > On Jan 12, 20:14, jpero(a)sympatico.ca wrote: > > > > > Sounds like PSU is reacting to overloading or medium shorts > > > downstream of that PSU outputs. Also can happen with dried > > > up capacitors (too high ESR). > > > > I don't think it's any of those. The regulators all make a similar noise > > when I put them on a dummy load drawing 5A, on the bench. And I'm sure > > Have you tried a lighter _or heavier_ load? It can make quite a > difference. Yes, it changes the pitch somewhat (as I would expect) and it gets slightly louder with a heavier load. > > it's not bad caps, as two of them are ones I repaired recently. > > Which, if any, capacitors did you replace? In one H744, all the electrolytics (the output one had gone, so I figured I might as well do the lot). -- Pete Peter Turnbull Network Manager University of York

23 years, 6 months

1
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H744 regulator whistle

by pete＠dunnington.u-net.com

On Jan 13, 17:03, ajp166 wrote: > From: Pete Turnbull <pete(a)dunnington.u-net.com> > >On Jan 12, 20:14, jpero(a)sympatico.ca wrote: > > > >> Sounds like PSU is reacting to overloading or medium shorts > >> downstream of that PSU outputs. Also can happen with dried > >> up capacitors (too high ESR). > > > >I don't think it's any of those. The regulators all make a similar > noise > >when I put them on a dummy load drawing 5A, on the bench. And I'm sure > >it's not bad caps, as two of them are ones I repaired recently. > > This is normal for them as well as the older H780. They are very loud > and the pitch varies with load as well. That is a side effect of older > low voltage, low frequency switch mode PS designs of some 20+ years ago. I suppose so, I just didn't think it ought to be so irritating! -- Pete Peter Turnbull Network Manager University of York

23 years, 6 months

1
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Mac IIci

by SUPRDAVE＠aol.com

In a message dated 1/13/2002 3:07:42 PM Eastern Standard Time, fernande(a)internet1.net writes: > The Local GoodWill has a fairly nice Mac IIci. I've done some research > on the Low End Mac web site, but am still undecided if I should buy it. > i'd say get it if you dont have one. ci model is much better than si and unlike the cx, has builtin video. I have one complete with video capture card and came with and still setup for videoconferencing.

23 years, 6 months

1
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Creating PDF's from scanned image files

by djg＠drs-esg.com

> I think I have cracked the issue of converting scanned images into PDF > using only freeware! > > First off get the imagemagick toolset from www.imagemagick.org > You will also need c42pdf available at http://c42pdf.ffii.org/ > > c42pdf will create pdf files from group 4 encoded tiff images (only). To > get to those images use imagemagick convert : > > convert -compress group4 <any image file> image.tif > c42pdf image.tif > > will create image.pdf. Read the docs to see how to build multi page PDFs. > I convert tiff to g4 tiff with the following tiffcp -L -c g4 -r 10000 infile1 [infile2...] outfile This tool takes much less memory to convert. This is >from libtiff-3.5.5-2. http://www.libtiff.org/ (part of the tifftools) I have a version that I fixed some problems in c42pdf at ftp://ftp.pdp8.net/software/c42pdf/ If somebody wants a windows binary I can try building a command line one with cygwin, email me. Command line I use c42pdf -q -o outfile -p o --nostretch --noflip infile.tif It also has a --pages flag to only convert some pages. This is done on the fly to convert the tiff's on my site to pdf. This doesn't create optimized PDF's so acrobat can't fetch them a page at the time (for good or bad, frequently that delay on each page annoys me) http://www.pdp8.net/pdp8cgi/query_docs/query.pl David Gesswein http://www.pdp8.net/ -- Run an old computer with blinkenlights.

23 years, 6 months

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Any interest in a Sord IS-11?

by nerdware＠ctgonline.org

I've recently come across a Sord IS-11 (I think that was the model number....) with a 64k ram expander, the microcassette drive, and a full set of Eproms. It has all the manuals, but no power supply. Since I haven't heard of one before, and haven't seen on listed on ebay, anyone hear interested? Let me know or it goes in the recycling pile, since I've completely run out of collecting room. Thanks. Paul Braun WD9GCO Cygnus Productions nerdware_nospam(a)laidbak.com "A computer without a Microsoft operating system is like a dog without a bunch of bricks tied to its head."

23 years, 6 months

4
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WTB: TMS 4060 RAM or Equivalent

by robotron＠ntlworld.com

Hi ... I'm new to this list and I'm not sure if you trade/buy/sell here but I'm looking for some TMS 4060 RAM or Equivalent. Anyone have any or know where I can get some? I need it to repair some 8080 based computers. Thanks in advance .... Dave Langley www.robotron-2084.co.uk

23 years, 6 months

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Does anyone have details about the STC ZEBRA? Tony?

by mythtech＠Mac.com

>STC = Stantec = Standard Telephone and Cable. They sold a truly strange >computer called the ZEBRA. It was designed to be cheap (it used a drum >for storage and did arithmetic serially). I used to have two of them... if you are talking about the same Zebra systems I had. I don't know much about them. One of my first duties at this company was to replace them with PCs. They were used to run the "PICK" OS, and in that run an interviewing system called "Oscar". As far as the use I saw them doing, they really were nothing more than a terminal server. They were replaced within weeks with 386 PCs with DigiBoards, and an intel build of PICK and Oscar. IIRC, the Zebra's were based around a Motorola 68000 processor (I think at 16mhz, not sure... this is totally off memory). I do have 2 fairly large manuals for them still (3" binders with an assortment of smaller manuals or "chapters" clipped in them). I might also have a tape backup drive for it, but I think they had tape drives built in, so the external drive I am thinking of may go to my AT&T unix machines. I think I also still have the modem that was used on the Zebras (although, I would guess it is probably nothing more than an fairly standard 300 or 1200 baud modem). -chris <http://www.mythtech.net>

23 years, 6 months

4
5
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IBM RT Megapel boards F4COS

by zaft＠azstarnet.com

I have three Megapel video boards for the IBM RT, free for cost of shipping. Preference given to people in the US as it is so much less hassle. I believe them to work but I have no way to test 'em. Contact me offlist if you want one! GZ

23 years, 6 months

1
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Creating PDF's from scanned image files

by hansp＠aconit.org

I think I have cracked the issue of converting scanned images into PDF using only freeware! First off get the imagemagick toolset from www.imagemagick.org You will also need c42pdf available at http://c42pdf.ffii.org/ c42pdf will create pdf files from group 4 encoded tiff images (only). To get to those images use imagemagick convert : convert -compress group4 <any image file> image.tif c42pdf image.tif will create image.pdf. Read the docs to see how to build multi page PDFs. This has worked for a bunch of files for me so far. -- hbp

23 years, 6 months

4
4
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H744 regulator whistle

by ajp166＠bellatlantic.net

From: Pete Turnbull <pete(a)dunnington.u-net.com> >On Jan 12, 20:14, jpero(a)sympatico.ca wrote: > >> Sounds like PSU is reacting to overloading or medium shorts >> downstream of that PSU outputs. Also can happen with dried >> up capacitors (too high ESR). > >I don't think it's any of those. The regulators all make a similar noise >when I put them on a dummy load drawing 5A, on the bench. And I'm sure >it's not bad caps, as two of them are ones I repaired recently. This is normal for them as well as the older H780. They are very loud and the pitch varies with load as well. That is a side effect of older low voltage, low frequency switch mode PS designs of some 20+ years ago. Allison

23 years, 6 months

1
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Mac IIci

by tlindner＠ix.netcom.com

> Pat Finnegan wrote: >> I would say about a 386DX, and it'll do about 6MIPS max (one instruction >> per four clock cycles on the 68030 IIRC from my Mac IIsi). (If desired) >> you can put an older verions of MkLinux or linux-m68k on it (I used the >> m68k Debian port). > > How about BSD? I'll probably use the Mac OS, but I wonder about other > options. I remember using BSD on my IIcx. Forget which one though. -- tim lindner tlindner(a)ix.netcom.com "Life. Don't talk to me about life." - Marvin, the android

23 years, 6 months

1
0
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H744 regulator whistle

by pete＠dunnington.u-net.com

On Jan 12, 20:14, jpero(a)sympatico.ca wrote: > Sounds like PSU is reacting to overloading or medium shorts > downstream of that PSU outputs. Also can happen with dried > up capacitors (too high ESR). I don't think it's any of those. The regulators all make a similar noise when I put them on a dummy load drawing 5A, on the bench. And I'm sure it's not bad caps, as two of them are ones I repaired recently. Maybe I'm just sensitive to that frequency range :-( -- Pete Peter Turnbull Network Manager University of York

23 years, 6 months

2
1
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H744 regulator whistle

by pete＠dunnington.u-net.com

I have two H744 regulators in my PDP-11/40, along with an H7441, H745, and H754. I also have two spare H744s and one each H745 and H754. All the H744s emit a fairly loud whistle, and it's driving me nuts. I've seen a note somewhere that a loud whistle is caused by the coil de-laminating, but I don't think that's the case. I tried swapping the two original H744s for spares, no difference. I also tried swapping the coil from the spare H745, which runs almost silently, and that made no difference either. I don't think I can just remove (short out) the coil either, as this is a switching regulator and the coil is needed to make it work properly. Any suggestions? -- Pete Peter Turnbull Network Manager University of York

23 years, 6 months

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Does anyone have details about the STC ZEBRA? Tony?

by dpeschel＠eskimo.com

STC = Stantec = Standard Telephone and Cable. They sold a truly strange computer called the ZEBRA. It was designed to be cheap (it used a drum for storage and did arithmetic serially). The instruction format is unusual -- 15 function bits (I think each affects a gate) and a 12-bit address of a drum location and a 5-bit address of a "fast store" location (basically a small number of registers). The amount of logic in the machine is small, so the instruction decoding is simple in a sense. But the logic is connected in very subtle ways -- two things can happen independently, or an instruction can set a whole sequence of events in motion. There is an emulator for this machine; I have some of the literature about it too. But I don't have the manual or the schematics, and the literature I have just doesn't make the design "click" into place in my head. The emulator code is not very intuitive either. So that's why I'm hoping someone else has heard of this machine. -- Derek P.S. Tony, I think you would enjoy this design (if you don't already know about it).

23 years, 6 months

2
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KA655 boot PROM errors

by Antonio.Carlini＠riverstonenet.com

> jkunz(a)unixag-kl.fh-kl.de wrote: >t 9e lists this codes as: >42 20051269 Check_for_intrs *** >C6 2004D2F0 SSC_powerup ********* >53 2004E8C0 TOY clock repeat_test_250ms_ea Tolerance *** > >TOY clock is OK, as I expect the NiCd akku to be ded. But >"Check_for_intrs" and "SSC_powerup" are not that explanative to me. SSC is the System Support Chip and it sounds as though the diags are finding something wrong with it. I have no docs that detail much about the SSC and nothing that details exactly what the diags are doing. It does sound as though the chip has some sort of serious failure. I *thought* that the SSC provided the console support too - if that's right then it's clearly not completely dead. Did these errors only start when you swapped cards around? Do thigns work when you put things back as they were? Antonio

23 years, 6 months

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H744 regulator whistle

by pete＠dunnington.u-net.com

On Jan 13, 2:54, Sipke de Wal wrote: > Sometimes it helps to fasten coils a bit with siliconekit > or araldite, or if a bit of heat is not a problem thermal-glue > Silicone kit has the added benefit of dampening high freq. > vibrations cause it has a somewhat rubbery constitution.... The coils in H7xx regulators are already encapsulated. Sorry, I should have mentioned that. -- Pete Peter Turnbull Network Manager University of York

23 years, 6 months

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KA655 boot PROM errors

by jkunz＠unixag-kl.fh-kl.de

Hi. Every time I switch my MicroVAX 3900 on it says: ----- ?42 2 0C FF 00 0000 P1=2004CBA6 P2=FFFFFF0C P3=00000001 P4=00000000 P5=00000000 P6=00000000 P7=00000000 P8=00000000 P9=00000000 P10=00000000 r0=0000000C r1=00000000 r2=00000042 r3=2014078C r4=20051269 r5=20051096 r6=200550A7 r7=00000000 r8=00000000 ERF=80000000 ?C6 2 01 FF 00 0001 P1=00000000 P2=00000000 P3=00000000 P4=00000000 P5=00000000 P6=00000000 P7=00000000 P8=00000000 P9=00000000 P10=00000000 r0=00000000 r1=00000022 r2=00000080 r3=201407A4 r4=2004D2F0 r5=2004D310 r6=2004D316 r7=00000000 r8=00000000 ERF=80000000 KA655-A V5.3, VMB 2.7 Performing normal system tests. 40..39..38..37..36..35..34..33..32..31.. ?53 2 05 FF 00 0002 P1=00000002 P2=00000028 P3=00000000 P4=00D45577 P5=00000000 P6=FFFFFFFF P7=00000000 P8=00000000 P9=20051BD2 P10=20051CE0 r0=00000001 r1=00000001 r2=00000053 r3=00000000 r4=00000002 r5=2004E8F9 r6=200551A9 r7=00000000 r8=00000000 ERF=82000180 30..29..28..27..26..25.. 24..23..22..21..20..19..18..17..16..15..14..13..12..11..10..09.. 08..07..06..05..04..03.. Normal operation not possible. >>> ----- What does it want to tell me? I get the same if I restart it via the reset button after power up. If it was running for a wile I don't get an error on reset. If I switch the power off for a few secounds I get the error again. NiCd akku? -- tschuess, Jochen Homepage: http://www.unixag-kl.fh-kl.de/~jkunz

23 years, 6 months

7
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3com 3station

by jeff.kaneko＠juno.com

On Fri, 11 Jan 2002 10:21:25 -0500 (EST) Pat Finnegan <pat(a)purdueriots.com> writes: > By looking at mine, I can tell it uses a VGA monitor, and has 1M of > RAM (upgradable to 5M with SIMMs I have laying around here). Oh yeah, > it looks to be a 20MHz 80286 also. Yeah, that's the later version. I seem to recall that they didn't make too many of those. . . . > > I still have a copy of 3+Share (and 3+Start) around here > > someplace . . . > > That would be nice if you could find it. However, I won't hold my > breath for it. After attempting to hook an old floppy drive up to it's > 34pin connector, I realized it was definately designed for something else > (one orientation froze the box, the other shorted out the power supply > :-( ) Yow! DOes the thing still light up? I never did fighre out what that connector was for. > I'll take that into consideration. Thanks for the help! Sure. Mebbe I'll have to dredge up my copy of 3+Share . . . Jeff ________________________________________________________________ GET INTERNET ACCESS FROM JUNO! Juno offers FREE or PREMIUM Internet access for less! Join Juno today! For your FREE software, visit: http://dl.www.juno.com/get/web/.

23 years, 6 months

3
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OT: DELL SUCKS! Re: PC Gamer, best 50 classic games issue?

by mythtech＠Mac.com

>But if you pick the cheapest, you may find they underestimated >what it took to run a profitable company that will survive, and >6 months later are out of business. > >I've seen it. People that bought from cheap local vendors that >offered 5 year, even lifetime, warranties, gone, gone, gone. > >They come and go like sand on the beach. > >If they want a cheap PC, they have probably doomed themselves >to failure from the outset. I agree, but still, my attitude has become (due to years of dealing with windows and the declining quality of PC hardware), that you can spend $3000 on a PC, or you can spend $300 on a PC, and they are both going to work (quality/stability wise) about the same. Either way, you will wind up with problems keeping windows running. Granted 99% of this is due to windows sucking so bad (if you aren't planning on running windows, then this is a totally different situation, but I am only dealing with advise I give to prospective Wintel buyers). As for if a company will be here in 5 years to support the PC, there are no bets that ANY computer company that is here today will still be here 5 years from now. (perfect example of this. A few years ago, my fire department decided to switch from a Mac to a PC since we need to upgrade the computer anyway. The PC people argued that Apple wouldn't be here in 5 years, so don't get a Mac. Us Mac people pointed out that it doesn't matter, because in 5 years the computer will be ready to upgrade anyway. Well, the vote went to get a PC... and to buy a Packard Bell. Well... Apple is still selling Macs... and Packard Bell... well... they are the ones that are gone... so the computer was replaced AGAIN, this time with a Gateway... who now looks to be dying) But I would still support people going to a fly by night, and risk them going under. I don't advise getting long term support contracts anymore, simply because I am so unimpressed with the support you can get. Phone support tends to be luck of the draw. 90% of the time you get a brainless bonehead. On site tends to be just as bad (I might be in one of those "bad contract support" areas for the local "on site" support options... don't know). So why pay 5 times the price to get a "brand name", when it is going to give you the same headaches as the cheaper CompUSA sold, or mom & pop sold PC. At least if you buy from a local vendor (CompUSA, or a mom&pop), you can carry the computer in to them and bitch to a person... you aren't stuck with phone support. And buy going with a cheap mom&pop... you are more likely to get them to fix it. CompUSA will tell you to contact the computer maker. Although, I do hear good things about the local Gateway Country store in doing on the fly repairs on a carry in. But honestly, I just don't recommend Wintel machines AT ALL anymore. I really tell people to look around and find another option. If you want if for games get a console system, if you want it for internet access, get a used PC (I recommend used Win systems over used Macs for an internet only machine, simply because, like it or not, many web sites cater to windows and IE... that and many of the people that ask me about an internet only machine want AOL, and the windows AOL client is much better than the Mac one), and if you want it for general computing, get a Macintosh. Windows blows, and is no longer worth the money and heartache for new machines unless you NEED it for some reason. But that is just my opinion. -chris <http://www.mythtech.net>

23 years, 6 months

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Stan Veit's History of the PC Books - Blow Out - $4 Shipped!

by MTPro＠aol.com

I have a number of brand new copies I'd like to move out. This is a super deal just for classiccmp subscribers. Please e-mail me! For more info on the book, see: http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=1289515294 Best, David David Greelish Classic Computing www.classiccomputing.com "classiccomputing" on eBay

23 years, 6 months

3
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Free: 3B2 OS tapes

by mrbill＠mrbill.net

I've got two QIC tapes here: - AT&T 3B2 Operating System Utilities Release 3.2.1 V3 120Mb Tape - Operating System Utilities Rel 3.2.1 V3 Issue 2 (1Q93) Free for the cost of postage. Surely someone has a 3b2 and needs an OS.. Bill -- Bill Bradford mrbill(a)mrbill.net Austin, TX

23 years, 6 months

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test-drb January 2002