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

by ard＠p850ug1.demon.co.uk

> Yes, this drive did have a sticky bumper. I resolved it by putting a very > thin sliver of tape over the sticky bit. I did not loosen any bolts, but I wonder if that bumper is no the wrong size, and that is what's causing the problems.Maybe the heads have to be able to find something o nthe disk for hte drive to not find an error. -tony

16 years, 1 month

3
2
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Tandy 102 Portable Computer

by silent700＠gmail.com

On Sat, May 22, 2010 at 6:06 PM, Zane H. Healy <healyzh at aracnet.com> wrote: > I just got the second load of Commodore gear (including a mint C16 and tape > recorder). ?In the load was some stuff for the Tandy, which reminded me I > got one in January with the other load. ?It works! :-) The 10x series have a hardcore following that appears to be going strong. I've heard this is the nexus of all info online re: Tandy 10x. Messy page, but dense with data: http://www.club100.org/

16 years, 1 month

2
1
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Early Byte Magazines

by bruce＠consultbcm.com

Earlier Byte magazines: 8/76, 11/76, 1/77 through 6/77, 2/80, 5/80 and 8/80. All in good condition. Best offer for all eleven will take them. Shipping additional. Contact me at bcmactuary at gmail.com. Bruce

16 years, 1 month

1
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(ebay) Wang VS100 mini

by legalize＠xmission.com

Item # 160437181052 opening bid is a reasonable $100. They say it was decommissioned in 2009, so maybe they have some of the peripherals too. -- "The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download <http://legalizeadulthood.wordpress.com/the-direct3d-graphics-pipeline/> Legalize Adulthood! <http://legalizeadulthood.wordpress.com>

16 years, 1 month

3
4
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Original Commodore PET for sale

by bryan.pope＠comcast.net

I have decided to put my Commodore PET 2001 with blue bezel up for sale. It is in beautiful condition with both the computer and tape drive working very nicely. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=190399121787 or Item #190399121787 Cheers, Bryan

16 years, 1 month

1
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Tandy 102 Portable Computer

by healyzh＠aracnet.com

I just got the second load of Commodore gear (including a mint C16 and tape recorder). In the load was some stuff for the Tandy, which reminded me I got one in January with the other load. It works! :-) A couple questions. First any recommendation on cleaning the screen. It looks like it sat in its bag for too many years. Second, are there any good manuals for the BASIC implementation online? How does one save or load a BASIC program? I'm so excited, and I can't believe I forgot I had this for almost 4 months! I've wanted one of these for about 20 years. Zane -- | Zane H. Healy | UNIX Systems Administrator | | healyzh at aracnet.com | OpenVMS Enthusiast | | | Classic Computer Collector | +----------------------------------+----------------------------+ | Empire of the Petal Throne and Traveller Role Playing, | | PDP-10 Emulation and Zane's Computer Museum. | | http://www.aracnet.com/~healyzh/ |

16 years, 1 month

1
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more stuff FFS: 68K and classic Apple software

by spectre＠floodgap.com

They have been claimed. Thanks to all who inquired. -- ------------------------------------ personal: http://www.cameronkaiser.com/ -- Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser at floodgap.com -- The world is a mess and I just need to rule it. -- Dr. Horrible ------------

16 years, 1 month

1
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Anyone off to VCF-UK?

by ard＠p850ug1.demon.co.uk

> I think you may be being a little too critical. I too raised an eyebrow at > the 64K memory thing, however I think is it not meant to be taken literally, 30-odd years of working with computers had made me take things literally.. And I would suspect a lot of other computer enthusiasts would feel the same way, particularly in the rules for an event so-say aimed at computer enthusiasts and related to said computers > but just intended to mean that recent-ish PCs do not count. Also regarding I realised what it was supposed to mean... However I feel it could imply one of the following They believe that no vintage computer ever had a memory module > 64K (again, what units?) They believer that while such machines existed, nobody has got them in their private collections > space, I quote (my emphasis) "*Typically* we will have 2m x 1m available for > those bringing systems, *although we will make more space for something > special*.". They also link to pictures of the US VCFs, indicating this is Yes, I read that. My point is that 2m*1m is too small IMHO for _any_ meaninful exhibit othter than posisbly a 1980's home micro. Again, it appears that's the sort of machine they are expecting. My view is that they should have asked people who wanted to exhibit what they were planning on brining, the size, the power requirements, and so on. There should also have been a web page for potential exhibitos giving details of power, access (could you get a vheicle near the exhibition room?) and so on. > what they want to replicate, and those *do* show working systems etc, so I I have learnt by bitter experience not to make assumptions like that. > don't think it is fair to say they want art pieces and they don't want them > to work. I have to agree that there is no info on power available, so that > would be a concern. I would imagine that the security of your collection > would have to be your responsibility though, and I think that is as it > should be. I also can't see why you think this is a non-technical event, I I would agree that security should be the exhibitors responsibiliy. Which essentially means a 1-man exhibit is impossible. And that exhibitoirs do not get to enjoy the rest of the VCF. > actually can't see anything that says it is either technical or > non-technical, I think people will make of it what they want, and I > certainly can't imagine anyone in my immediate family ever wanting to attend > such an event, so I am pretty sure most attendees will be enthusiasts. Hmmm.. Amoe years ago I volunteered at Bletchley park (I gave up for several reasons, mostly due to terminally clueless management). THe visitors on those days certainly included a large number of non-technical people (thei did not really suprise me). Since the VCF is going to be open to all of those who are attending BP on that day, I would guess there will be some non-technical people at the VCF too. -tony

16 years, 1 month

1
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Today's Google Doodle

by ploopster＠gmail.com

In honor of the 30th birthday of Pac Man, today's Google Doodle is a playable Pac Man game in the shape of the word "Google". http://www.google.com/ Peace... Sridhar

16 years, 1 month

19
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more stuff FFS: 68K and classic Apple software

by spectre＠floodgap.com

More stuff from my closet that's gotta go. These are offered as AN ITEM. I will not part them out. Actual shipping or pickup gets them. Pickup and USA requests have priority, but I will consider international requests. Pickup from Inland Empire, CA. Need to be out by the end of the month. I don't testify to their completeness or functionality, but they all appear to contain manuals and the full complement of disks. - Now Utilities 5.0. Includes Now Foldermenus + Now Menus (hierarchical file, utility and folder menu extension), Now Save (autosave tool), Now Startup Manager (Extensions Manager on roids), Now Super Boomerang (enhances the standard Save/Open dialogues without Nav Services), Now Scrapbook (image and media converter and archiver), Now Profile (spiritual ancestor to Apple System Profiler), Now Quickfiler (fast find) and Now WYSIWYG Menus (WYSIWYG font menu extension). System 7.0+, PPC enhanced, 68K compatible. - DataDesk by Odesta. Stats package, interactive graphs, ANOVA analysis, etc. Mac 68K. Used this tool a lot as an undergrad. - AppleShare 2.0.1 (supports AppleTalk Phase 2) for the PC. Requires PC ISA AppleTalk card (not included). - pcMACTERM II for the PC and Mac. Allows the Mac to take remote control of a DOS PC over an AppleTalk network, and file exchange. Includes both PC 5.25" and Mac 3.5" disks. Requires PC ISA AppleTalk card (not included). Also posted to 68KMLA. -- ------------------------------------ personal: http://www.cameronkaiser.com/ -- Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser at floodgap.com -- Communism doesn't work because people like to own stuff. -- Frank Zappa ----

16 years, 1 month

1
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Assorted items in Canterbury, UK, part 1

by ats＠offog.org

Hi all, I'm going to be moving house next month, so I've been slimming down my collection a bit -- here's the first batch. If you'd like to give any of it a home, let me know; offers from 0p and up accepted. I'm mostly just after the space back, although if anyone'd like to swap me a Commodore 1541 or two... This is located in Canterbury, Kent, UK. I'd prefer local collection or delivery. I'm not going to be able to make it to VCF-UK (:(), but if you know someone else from the south-east who's going, I could deliver bits to them. A box of assorted PET-related items (but no PETs), including: - A few IEEE-488 cables, both 488-to-488 and PET-to-488 - Internal PET serial board that appears to piggyback on a ROM socket - Small Systems Engineering B200 488-to-serial interface (boxed) - Small Systems Engineering B300 488-to-serial interface (unboxed, dusty) - User-port-attached 2716 EPROM programmer - Mutek Sprinter 64K printer buffer - A stack of assorted manuals and other paperwork, including manuals for most of the bits above and PET schematics - Commodore "Anatomy of a Microcomputer" poster (PET quick reference) RM 480Z manuals: - Link 480Z User's Guide - Link 480Z Information File - Extended Basic v5 - Extended Basic v5/6 A Signetics Instructor 50, with manuals, PSU and training tape. This is a rather neat Signetics 2650 development kit. Original ACT Apricot PC, with keyboard, the world's cutest monitor, and some documentation. This is an 8086 non-PC-compatible MS-DOS machine, with early 3.5" drives. New-in-box Philips Z80 computer boards. The outer box is labelled 8213 170 26550 Type VM 5020 -- so is this half of a P5020? - 8213 170 25810 Type VM 5022 - motherboard with Z80 and Z80CTC (This has slots for various other boards to plug into, including the two below, and RAM and graphics boards which I don't have) - 8213 170 25840 Type VM 5023 - disk controller board with MMB8877A and Z80DMA - 8213 170 27160 Type VM 6500/C - modem - 8213 170 27601 Speaker Radio Shack "Science Fair Digital Computer Kit". This is really just a load of multiway switches and some creative manual-writing -- but aside from the box being tatty, it appears to be complete. I have separated the original batteries (which hadn't leaked!). The keyboard from a Tatung VT-4100 terminal. This has been rewired as a keyboard for a ZX Spectrum at some point, so it's cosmetically OK but there's no PCB inside, just the keyswitches. Compaq dual Pentium Pro desktop PC. I have more bits elsewhere (mostly newer Sun/SGI/PC stuff); I'll post another lot once it's sorted out... Thanks, -- Adam Sampson <ats at offog.org> <http://offog.org/>

16 years, 1 month

1
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Anyone off to VCF-UK?

by wdonzelli＠gmail.com

> I think time will tell whether this is a worthwhile event or not, > ultimately, I think if technical people want to attend then it will be a > technical event, if they stay away it won't be. As this is the first such in > the UK I think we should give it a chance and take the opportunity to > influence the shape of future events. I would encourage all our UK and European members to give this show a chance. Go. You will have fun. Go to any VCF you can. Go to Sellam's original VCF, when he gets it going again. Go to the MARCH VCFEast, so you can pick a fight with me. Go to VCF Midwest ot VCF Europe. We, as a community, still need to work on PR. There seem to be some assholes that have/had...issues...with the Museum folk in question, and now have an axe to grind (really, who did not see this coming?), but they can be ignored, and fun will be had by all attending. I wish I could be there, but I have more machines to rescue. -- Will

16 years, 1 month

1
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Anti-glare filter material for old CRTs?

by derschjo＠mail.msu.edu

Hi all -- I have an Apple III green-screen monitor here which is pristine except for a big gash in the anti-glare material (some sort of fine mesh) covering the front of the CRT. I'd like to replace it, but I'm not entirely sure what it is that I'm looking for... anyone done this before? Thanks as always... Josh

16 years, 1 month

2
1
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Looking for DEC BA11-A chassis (PDP 11/44 or 11/24) rail sets

by paulp1＠gmail.com

If someone knows where to find these, I'd like to buy a couple. Thanks, Paul

16 years, 1 month

1
0
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Today's Google Doodle

by ploopster＠gmail.com

In honor of the 30th birthday of Pac Man, today's Google Doodle is a playable Pac Man game in the shape of the word "Google". http://www.google.com/ Peace... Sridhar

16 years, 1 month

2
1
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RD53 Restoration

by ard＠p850ug1.demon.co.uk

> > > Yes "blipping" the coil with a 9V battery moves the heads. When the > > drive > > > was powered on I also measured the voltage by attaching a probe to > > each end > > > of the coil cable, in that case I measured about 1.3V only. So I am > > guessing > > > the coil is OK. Next step is to swap the boards back again. > > > > And then fix the real fault :-) > > > Indeed, if only I knew what it was! As we all well know, funding the fault is often a lot harder than repairing it... Do the schematics for the RD53 exist on the web? I've not looked. Or am I going to have to take one of mine apart and work out how it should work.. This is going to sound silly, but do you have one of those DEC mounting skids fitted? I had problems with an RD53 that wouldn't work if the skid was on. Turns out some component leads were shorting to the ground plate on the skid. A piee of cardboard cured that :-) > The problem for me is how to diagnose this. I am pretty sure the motor is up > to speed. However one thing that does seem slightly odd is that it starts to > spin the disk down quite soon after power up. Previously with the old Is it possible it doesn;t think the motor is properly up to speed? I wonder how it senses that? if it thinks there's a problem with the motor, it will spin down fairly quickly. -tony

16 years, 1 month

6
8
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Straight 8 for sale

by root＠parse.com

I have (ironically) acquired a straight 8; much as I would like to keep it and restore it, I no longer have the equipment or spares to do so. The website "www.pdp12.org" contains the pictures and inventory. I will be accepting offers until the end of Friday, June 11th, 2010 (23:59 EDT). All pieces will go as one lot. Winner, if any, will be notified by the next Monday. This unit is partially disassembled (and will be shipped that way; boxed), but it looks like most of the parts are there. I have been told that it is missing cards; I have posted a best-efforts card inventory which should allow you to make a determination on how many (if any) cards are missing. I am available to answer any questions you may have. Shipping is to be arranged by you; location is Kanata, ON/Canada. I will have the two cabinets wrapped and protected with styrofoam, and all other components will be boxed and ready for the shipper to put in a palette and plastic wrap (there will only be three or so boxes, so this will take almost no time). CTS is recommended (www.moveit.com). Cheers, -RK -- Robert Krten

16 years, 1 month

1
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Usenet's home shuts down today • The Register

by woyciesjes＠sbcglobal.net

http://www.theregister.co.uk/2010/05/20/usenet_duke_server/ -- --- Dave Woyciesjes --- ICQ# 905818 --- AIM - woyciesjes --- CompTIA A+ Certified IT Tech - http://certification.comptia.org/ --- HDI Certified Support Center Analyst - http://www.ThinkHDI.com/ Registered Linux user number 464583 "From there to here, From here to there, Funny things are everywhere." --- Dr. Seuss

16 years, 1 month

4
3
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? testing Apple ProFile

by martin.kaeser＠auge.de

The ProFile (5 MB) spent the last years in storage. What should i do before starting the self test? The ProFile was used on either a LISA or an Apple III or an Apple II. I'd hate to test it on, say, a LISA and accidentally wipe out Apple II or III data. Is there a safe way to find out about the content? Martin K?ser

16 years, 1 month

2
1
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Anyone off to VCF-UK?

by mtapley＠swri.edu

At 23:07 -0500 5/15/10, Fred wrote: >Could somebody please give Tony a ride to it? > >Tony, >GO! Seconded. Most useful post I've seen in weeks. Where do I send contributions? Assuming we can make this a zero-sum game (go vs. not go) for Tony's finances, I'd like to do that. -- - Mark 210-379-4635 ----------------------------------------------------------------------- Large Asteroids headed toward planets inhabited by beings that don't have technology adequate to stop them: Think of it as Evolution in Fast-Forward.

16 years, 1 month

6
12
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The Declassified History of NSA Computers

by wbblair3＠yahoo.com

PDF report, "History of NSA General-Purpose Electronic Digital Computers": http://www.governmentattic.org/3docs/NSA-HGPEDC_1964.pdf

16 years, 1 month

10
11
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Don't know if anyone cares, but...

by mdavidson1963＠gmail.com

I don't know if anyone on the list will care of not, but I just purchased a classic IBM PC (original model 5150) with a monochrome card and monitor for $45 on EBay. According to the seller, it was in storage at a museum for 18 years. They pulled it out, dusted it and it booted DOS right away. It's a dual-floppy model. I won't know more until it arrives, but it was sitting at zero bids until I bid on it with < 15 minutes left in the auction. The description the seller had used was a bit misleading and seemed to imply only the monitor was for sale, but I confirmed it was the entire system. I thought that was a pretty good deal, considering how much I paid for my first IBM PC back in 1983 or so. :) After that, I was at Weird Stuff Warehouse and they were asking $100 just for the monochrome monitor! But, while there, I did pick up some software bargains: A sealed copy of CA-CommonView (C++ GUI Library) for OS/2 for $3 and a copy of SCO Unixware 7 (appears complete) for $5. I love Weird Stuff! Feel free to ignore this if it's too off-topic for the list. :) Mark

16 years, 1 month

9
16
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RD53 Restoration

by robert.jarratt＠ntlworld.com

> -----Original Message----- > From: cctalk-bounces at classiccmp.org [mailto:cctalk- > bounces at classiccmp.org] On Behalf Of Rob Jarratt > Sent: 19 May 2010 21:59 > To: 'General Discussion: On-Topic and Off-Topic Posts' > Subject: RE: RD53 Restoration > > > > > -----Original Message----- > > From: cctalk-bounces at classiccmp.org [mailto:cctalk- > > bounces at classiccmp.org] On Behalf Of Tony Duell > > Sent: 19 May 2010 20:25 > > To: cctalk at classiccmp.org > > Subject: Re: RD53 Restoration > > > > > Could that be because the new boards are a different rev and > perhaps > > expect > > > > It's always possible. This is one reason why I really dislike > > board-swapping. It is much easier to repair a configuration that has > > worked once than one you don't know if it should work. > > > > I wonder if this drive depends on reading something from the platter > as > > ssonas the motor is up to speed (say a servo pattern). if so, then if > > the > > heads are moved to far in or out , it may fail > > > > Did this drive suffer from the well-known 'sticky bumper' problem? If > > so, > > what have you done about it? Is it possible that if you just removed > > the > > old bumper that the heads are outside the servo area sometimes? > > > > > Yes, this drive did have a sticky bumper. I resolved it by putting a > very > thin sliver of tape over the sticky bit. I did not loosen any bolts, > but > there is a bit of play in the heads when they are at rest and fully > retracted. > > > Regards > > Rob I have just put the original boards back in and powered up the drive twice. I powered it up twice and both times the heads moved briefly. I used a multimeter (it is all I have) to measure the voltage across the two leads to the coil. The first time I noticed that the voltage briefly went to about 1.3V, the second time it was always 0V although it looked like the multimeter may have noticed a change which was too fast for it. I then tried a few more times and these times the voltage went to 1.3 immediately. Then when the heads moved it went to about 4V and after that it went to 0V. So either I was measuring incorrectly the first two times, or there is still something not right even when the heads do move. Would be interested to know if anyone else sees these voltages. I have another RD53 which I can dig out at the weekend to compare. Thanks Rob

16 years, 1 month

1
0
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RD53 Restoration

by ard＠p850ug1.demon.co.uk

> Could that be because the new boards are a different rev and perhaps expect It's always possible. This is one reason why I really dislike board-swapping. It is much easier to repair a configuration that has worked once than one you don't know if it should work. I wonder if this drive depends on reading something from the platter as ssonas the motor is up to speed (say a servo pattern). if so, then if the heads are moved to far in or out , it may fail Did this drive suffer from the well-known 'sticky bumper' problem? If so, what have you done about it? Is it possible that if you just removed the old bumper that the heads are outside the servo area sometimes? > something different? The other thing I have just remembered is that the new > boards are missing the graphite pad under the spindle, but then again I have > run the original boards successfully with the bottom board lifted up so I > can probe voltages, so not sure that would have any effect. That should have no effect at all. -tony

16 years, 1 month

2
1
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Edge connector repair

by snhirsch＠gmail.com

There are many outfits offering repair kits for PCB edge connectors, but all of them are $2-300. That's complete overkill for the one or two repairs per year I might need to perform. If I purchase a "frame" of dry-adhesive backed traces from Circuit Medic, what are the chances of using a temperature-controlled bench iron to bond them? Anyone have experience with this? I can see making the $40 investment if it has even a chance of working. Alternately, what other approaches have folks used? Steve --

16 years, 1 month

6
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$8500 Tandy ad from 1989

by brianlanning＠gmail.com

It's fun to read this stuff. I didn't realize microchannel was available from anyone but IBM. And notice how it's MS(R) OS/2. :-) http://www.stephenbailey.com/technology/what-8499-bought-in-1989/

16 years, 1 month

7
10
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[OT] Space Shuttle and ISS (was Re: Amiga 1000 helps win againstpatent troll...)

by shoppa＠trailing-edge.com

> Originally the plan was to replace it with two systems: > * crew launched in an Orion capsule on an Ares I > * cargo (heavy lift) launched on an Ares V > Obama and the NASA administrator want to cancel Ares I, but Congress > might block that. > Ares I is an incredibly stupid design, but if we cancel it we will have > no capability of launching manned missions at all. I've seen this from at least 3 different sides: science, contractor, and government. >From a science perspective, everything being done in the 60's couldn't have been done without the government. Lots of science being done today can't be done without the government. But the scientists don't need any rockets more advanced than what we were doing in the 60's and 70's. They would appreciate simplificiation. But when your instrument is a one of a kind you would kind of prefer that it not blow up on the pad so there is conservatism at least at the expensive end of the project scale. At the low end of the project scale there are plenty of projects who wuold be glad to build five instruments (because they're cheap) with the hope that at least one makes it into space. >From a government perspective, everything has to be done in the "Ten Year Plan" style because there's never enough money to get it done in one year. But stretching it out over ten years in fact makes it more expensive. Things get real expensive for the government, especially a balkanized 40+ year old agency like NASA. Others might say that in a spiteful tone, but I honestly say it in sympathy because I know how people struggle to get good simple cheap science done in an agency that at many levels is thinking only about the ten-year zillion dollar programs. >From the contractor perspective, it's hard to compete against the Russians. You have to do more or better than the Russians, not the same, to compete. But more or better is always more expensive and longer to do... and it's often more than is actually needed too! The big ones try to be clever by buying the cheap startups but I wonder if the cheap startup simply gets stifled in the beauracracy. Tim.

16 years, 1 month

1
0
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Looking for CMD CQD-200/TM or CQD-200/M EPROM images

by glen.slick＠gmail.com

Does anyone have a CMD CQD-200/TM or CQD-200/M and an EPROM programmer or other means of reading the EPROM images that could send me a copy? I think I have mostly figured out the CSR decode PAL for a CQD-200/T and programmed a new one and now it responds to both the disk and tape CSRs, but only the tape CSR looks like it has normal values. Maybe I also need to replace the EPROMs with CQD-200/TM or CQD-200/M EPROM images to get it to respond normally to the disk CSR. I have had encouraging results so far doing the same to convert a CQD-220/M into a CQD-220/TM and got it working with both a disk and a tape at the same time. -Glen

16 years, 1 month

1
1
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RD53 Restoration

by rescue＠hawkmountain.net

I had one of these drives that behaved this way. As I figured I had nothing to lose, I opened it op and watched it operate.... The theory I came to was that the stopper material changed dimension with age and the drive could not get to track zero. I loosened the stopper and ever so slightly (2-3? thousandths of an inch ?) to let the heads further outward (as I recall). After doing that and reassembling.... it worked fine. I did not put a lot of 'miles' on the disk after that.... I had already put a different disk in service... but for the time I used/recovered data/tested it it powered up 100% every time after that 'repair'. I can't say if my theory is right.... and it could have been just dumb luck... but I thought I'd relay what I did... as if you don't get it to function any other way you don't stand much to lose by trying it. I believe I've read talk on here about homemade 'clean rooms' .... obviously the less dust/particulate matter you get in the drive the better the chances of longer term survival. -- Curt Rob Jarratt wrote: > I have posted before about an RD53 I am trying to get back to working order. > After unsticking the heads I thought I had a working disk as I have been > able to format it and do an image restore of the VMS installation media to > it. However, intermittently it has been failing. When this happens the heads > completely fail to move when I power on the disk, so the controller and > firmware cannot even determine its size. After a few moments the disk spins > down. As I said, this is intermittent, sometimes it will work OK. > > A friend has been helping me and he gave me a complete set of the three > boards in the RD53 from a known working disk (he can't give me the disk for > reasons not worth going into). I changed all three boards and the drive > still completely fails to move the heads, in fact now the fault seems > permanent. My friend suggested that the positioning coil may be faulty. He > measured the resistance of the coil on one of his working disks (at the plug > that goes to the coil from the motor control board), it came to 3 ohms, mine > also measured 3 ohms. I measured the voltage at the plug going to the coil, > one reads 2V the other 3V, but when it works they both go to about 5V. > > Can anyone suggest what might be the problem? > > Thanks > > Rob > >

16 years, 1 month

1
0
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[OT] Space Shuttle and ISS (was Re: Amiga 1000 helps)

by Gary＠realtimecomp.com

Scaled Composites was bought by Northrop Grumman in 2007. Doubtful it will compete with it's parent company in any meaningful way. ________________________________ From: cctalk-bounces at classiccmp.org on behalf of Shoppa, Tim Sent: Mon 5/17/2010 10:15 AM To: Gary Subject: Re: [OT] Space Shuttle and ISS (was Re: Amiga 1000 helps) Al writes: > I've always wanted to give Burt Rutan a run at a Space Shuttle > replacement. I bet he'd do something really nice. > His White Knight/Spaceship One combo seems pretty innovative. But, > that's not intended to be a Shuttle replacement. I actually hope he doesn't do "a Space Shuttle replacement". The Space Shuttle is a classic example of scope creep. It had to do everything. In the end it did do most all of everything, and it did it each of them pretty well, but it was much more complicated than needed for any one task, and schedules and budgets were blown out of the water. But excepting schedules and budgets... it did surprisingly well. What Burt Rutan could do, is a family of replacements, each of which does one of the shuttle's tasks well. Some stages/assemblies/technologies would probably end up being shared and that's great. Tim.

16 years, 1 month

1
0
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looking for SGI granite mice

by jlobocki＠gmail.com

hello, I'm looking for about 5 (or any number I can get close to) granite SGI mice, the first edition "mouse systems" non-logitech version. I have seen them on ebay, but what they are trying to pull for them seems a bit ridiculous. Thanks! -Joe

16 years, 1 month

1
0
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Intel MCS-8 cards still available

by cclist＠sydex.com

Folks, Awhile back, I posted a message from someone with a few Intel MCS-8 cards available. He still hasn't received any tickles on them. They can't be all that common. Email me if you'd like and I'll pass the message along. AFAIK, the cards are in the USA. --Chuck

16 years, 1 month

1
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Semi-OT - Using optoisolators with composite video signals

by ian_primus＠yahoo.com

I have the need to optically isolate a composite video signal to compensate for the different ground reference between the devices. Digging through my stash of parts, I have some optos, but the ones I have are more suited to digital applications. Having not tried to pass an analog signal through one before, I'm not quite sure what sort of part I'm looking for... Anyone have any suggestions? -Ian

16 years, 1 month

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cctalk Digest, Vol 81, Issue 46

by mtapley＠swri.edu

At 3:41 -0500 5/18/10, Jeff wrote: >See, having me in your Spacecraft Design class all those years ago is >coming in useful after all. Count the caps and the markings, and email >me. I've got the replacements. Knew it at the time, never doubted it since. Thanks one and all - I'll contact Jeff for parts and more advice if I can't figure out the removal/replacement process. I *really* like being on this list - the on-list and off-list replies have been very gratifying! -- - Mark 210-379-4635 ----------------------------------------------------------------------- Large Asteroids headed toward planets inhabited by beings that don't have technology adequate to stop them: Think of it as Evolution in Fast-Forward.

16 years, 1 month

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questionably OT: AmigaOS 4 on Mac PPC

by spectre＠floodgap.com

I see notes around the underweb about people using a custom OpenFirmware loader to get AmigaOS 4 booting on the G4-based Mac mini. This sounds like a ready-made way to create an Amiga laptop -- just use an iBook G4, which is nearly identical technically. Has anyone tried using the Moana loader? I am intrigued by AmigaOS, but I don't really have the space to set up a new PPC Amiga to try it (thus a laptop form factor would be fabulous). -- ------------------------------------ personal: http://www.cameronkaiser.com/ -- Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser at floodgap.com -- I think, therefore I'm dangerous. ------------------------------------------

16 years, 1 month

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PDP8/A for sale

by 1metalguru＠gmail.com

To those interested in my PDP8/A system: It contains: 1 - M8315 Hex Omnibus CPU 1 - H219B 16K Core Memory Module 1 - M8316 Option Board 1 with 1 - KC8AA Programming Panel 1 - M8317 Option Board 2 bootstrap 1 - M8342 Parallel Control 1 - M8357 RX8E Omnibus Interface 1 - M8326 Inter-processor Buffer 1 - PDP8/A Field Maintenance Print Set. 1 - PDP8 Internal Bus Options Maintenance Manual Vol 2 I am accepting offers to purchase this unit. I live in Calgary, Alberta, Canada. I have checked with UPS and Xpress Post and shipping to the continental United States would start at approximately $100, assuming a package 24x24x12 weighing 60 lbs. I also have a PDP8/I WO25 Core Memory Module mod 30-05256-2 made by Data-Ram Corp.: Darrell

16 years, 1 month

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video opto isolator single chip solution

by rdawson16＠hotmail.com

Ian, Here you go 8 pin DIP, and app note circuit in the datasheet: http://www.avagotech.com/pages/en/optocouplers_plastic/plastic_wideband_ana… Randyc _________________________________________________________________ The New Busy is not the too busy. Combine all your e-mail accounts with Hotmail. http://www.windowslive.com/campaign/thenewbusy?tile=multiaccount&ocid=PID28…

16 years, 1 month

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cctalk Digest, Vol 81, Issue 43

by ken＠seefried.com

On 5/17/2010 12:49 PM, Sridhar Ayengar<ploopster at gmail.com> wrote: > > Tandy wasn't the only other company making MCA machines. NCR made quite > a few different models. I believe Siemens made one or two as well. > The NCR Microchannel machines were quite well done. They spanned i486 and Pentium 1 desktop machines (the 3000 series?) through the WorldMark series with up 16 (or was it 32?) PPros running SVR4 to the Terradata-based boxes like the 3600 & 3700. I did some pretty interesting stuff on the later two at a large airline a long time ago. There was some definite teething pains with the SMP implimentation, but those were impressive boxes when things went well. Olivetti made some interesting Microchannel machines as well. KJ

16 years, 1 month

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Anyone off to VCF-UK?

by ken＠seefried.com

On 5/17/2010 12:49 PM, "RodSmallwood"<rodsmallwood at btconnect.com> wrote: > > It seems to be a bit like the aircraft preservation people. One of > everything but nothing flies. I just hate that. If something was built to > run and can run again with out damage it should. > To be fair, when a classic computer fails in use, it's pretty uncommon for anyone to die, and somewhat less uncommon for the entire device to be destroyed in the process. Exactly the opposite is true in the case of an aircraft. I can assure you that flyers want to fly, especially something interesting and/or unique, but sometimes the risk assessment doesn't make that smart. KJ

16 years, 1 month

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Mac Classic problems

by trag＠io.com

> > Date: Mon, 17 May 2010 11:02:56 -0500 > From: Mark Tapley <mtapley at swri.edu> > First pass, no sound out. Not speaker, not headphone > connector. Wait, if you hold your ear right up against it, you hear a > *little* bit. Hm. This is a (uhm) classic symptom of leaking caps on the Classic, and Classic II, and SE/30, and IIci, etc. We regularly discuss this issue (these days we usually just reference old threads) over on 68kmla.net. A search on "tantalum" is probably best, as the typical replacements we use are tantalums of the proper size and values. > gunge, and they were centered on the three groups of what look like > my favorite nemesis .... capacitors! > > <gnashing of teeth> > > Many q-tips and much isopropanol later, it boots, but it's > still quiet - too quiet - and I have a bad feeling about how long > it'll keep running before I have to clean it again. There's a bit of > corrosion on one lead of the sound chip, but I can still hear a very > very faint edition of the sound it's supposed to make. > > 2) If (sigh. When) I have to pull those things off, I will need a > hot-air soldering station, correct? My thought is, cut up an aluminum > can to make an air dam isolating the cap. from the rest of the board, > then blast it with hot air until it flies off or vaporizes. Is that > close to right? Use two pencils simultaneously. Radio Shack sells a 15 watt grounded pencil with a fine tip for less than $10. If you use two pencils you're much less likely to lift a pad by prying on a cap while heating one side, and after the other side has already cooled. If you were to use hot air, I find that modeling clay works conveniently and well to protect other components on the board. The simple procedure is: 1) Remove the old caps and remove the solder on the pads. 2) Clean the board thoroughly. 3) Replace the capacitors. To replace the caps, tin one pad. Place the cap carefully and hold it down with something like a small flat screwdriver. Heat the tinned pad until the caps sinks down to the pad. Remove the heat. Wait a few moments. Remove the pressing tool. Now solder the other pad/terminal. > 3) How do I get replacements, and how do I slap those back down on > the board? Is the code on the top all I need to order more? See, having me in your Spacecraft Design class all those years ago is coming in useful after all. Count the caps and the markings, and email me. I've got the replacements. Jeff Walther

16 years, 1 month

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RD53 Restoration

by ard＠p850ug1.demon.co.uk

> > Yes "blipping" the coil with a 9V battery moves the heads. When the drive > was powered on I also measured the voltage by attaching a probe to each end > of the coil cable, in that case I measured about 1.3V only. So I am guessing > the coil is OK. Next step is to swap the boards back again. And then fix the real fault :-) More seriously, it sounds like the positioner coil is not being driven hard enoguh to move the heads -- and if the coil was open-circuit I would ecpect the servo sysem to try to drive it very hard to attempt to get some movement. Normally there are various conditions which have to be satified (motor up to speed, no write current unless write gate is asserted, only one head selected, etc) before the heads will move. It's entirely possible the problem is in one of those areas. -tony

16 years, 1 month

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Anyone off to VCF-UK?

by roger.holmes＠microspot.co.uk

On 16 May 2010, at 05:07, cctalk-request at classiccmp.org wrote: > > Message: 3 > Date: Sat, 15 May 2010 20:12:58 +0100 > From: Roger Pugh <rogpugh at mac.com> > Subject: Re: Anyone off to VCF-UK? > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk at classiccmp.org> > Message-ID: <4BEEF23A.8050204 at mac.com> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > On 05/15/2010 01:00, Philip Pemberton wrote: >> Hi guys, >> >> Just out of curiosity, is anyone planning to attend the UK Vintage >> Computer Festival this year? The one that's running on the 19th and >> 20th of June at Bletchley Park? > > I intend to go for one of the days, but not sure which. > > Is anyone interested in a car share from the South East? > Possibly, I am roughly equidistant from M20 J8 and J9. Where are you? If I arrange to share a car I won't let apathy reign on the day. My best MPG car is about 23 so maybe not one of mine though my supercharged Daimler V8 is very luxurious, it only does 17 mpg! Roger Holmes.

16 years, 1 month

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Mac Classic problems

by mtapley＠swri.edu

All, Got a Mac Classic, swapped non-functional hard drive, installed RAM, nearly got it working for my 10-year-old. But.... First pass, no sound out. Not speaker, not headphone connector. Wait, if you hold your ear right up against it, you hear a *little* bit. Hm. Second pass, a week or so later, won't boot. Hmm. Opened it back up, looked over everything ... what's this? There's some stuff on the digital board. Wonder what could leave an oily stain, and how it got there in the first place without leaving tracks on the inside of the case, the CRT, the disk drives, etc. etc.? Well, won't hurt to clean it off, I thought ... then the penny dropped and I realized that there were *three* little islands of gunge, and they were centered on the three groups of what look like my favorite nemesis .... capacitors! <gnashing of teeth> Many q-tips and much isopropanol later, it boots, but it's still quiet - too quiet - and I have a bad feeling about how long it'll keep running before I have to clean it again. There's a bit of corrosion on one lead of the sound chip, but I can still hear a very very faint edition of the sound it's supposed to make. The Classic has a surface-mount digital board. The components I suspect are metal can devices, lots of them with the same marking (which I neglected to write down) and one different. Each has a tiny flat plastic-looking isolator or something between it and the logic board. 1) Is there a preferred solvent I can squirt under those things and the sound chip that'll pick up capacitor gunge (or whatever it is) better than Isopropanol? Is the old standby dihydrogen monoxide a good bet? (I have plenty of that.) 2) If (sigh. When) I have to pull those things off, I will need a hot-air soldering station, correct? My thought is, cut up an aluminum can to make an air dam isolating the cap. from the rest of the board, then blast it with hot air until it flies off or vaporizes. Is that close to right? 3) How do I get replacements, and how do I slap those back down on the board? Is the code on the top all I need to order more? Hints appreciated. Hm. Come to think, maybe I better double-check that the swapped-out hard drive was really dead. The SCSI port might have been the first casualty of the capacitor scourge. -- - Mark 210-379-4635 ----------------------------------------------------------------------- Large Asteroids headed toward planets inhabited by beings that don't have technology adequate to stop them: Think of it as Evolution in Fast-Forward.

16 years, 1 month

5
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i8355 from SDK-85 flakey

by tech＠pluscomputers.com

Chris, I have the monitor listing (v 2.1) for the SDK-85 in digital form if it will help. I've modified it to compile with Pseudo Sam by removing the macros. I've added line drivers (75188 and 75189) to my SDK-85 to support RS-232C and changed the code so it runs at 9600 baud. If you can rustle up an 8755 you could burn the monitor to it. Regards, Carl -- Carl Allen Plus! Computers, Inc. (336) 659-8549 tech at pluscomputers.com www.pluscomputers.com --

16 years, 1 month

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radio shack 28-249 manual

by holland＠pacbell.net

Hi, Sorry about my first email. It was late and my back was killing me. I would appreciate very much if I could some how get a copy of the manual for my 200 in one project kit. I am 60 yrs of age and disabled and have time on my hands.? I graduated in electronics, head of the class, but I still like basic things... like this kit. ? ??? Sincerely, ????????????????? Bruce Holland

16 years, 1 month

2
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[OT] Space Shuttle and ISS (was Re: Amiga 1000 helps)

by tshoppa＠wmata.com

Al writes: > I've always wanted to give Burt Rutan a run at a Space Shuttle > replacement. I bet he'd do something really nice. > His White Knight/Spaceship One combo seems pretty innovative. But, > that's not intended to be a Shuttle replacement. I actually hope he doesn't do "a Space Shuttle replacement". The Space Shuttle is a classic example of scope creep. It had to do everything. In the end it did do most all of everything, and it did it each of them pretty well, but it was much more complicated than needed for any one task, and schedules and budgets were blown out of the water. But excepting schedules and budgets... it did surprisingly well. What Burt Rutan could do, is a family of replacements, each of which does one of the shuttle's tasks well. Some stages/assemblies/technologies would probably end up being shared and that's great. Tim.

16 years, 1 month

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Anyone off to VCF-UK?

by roger.holmes＠microspot.co.uk

On 17 May 2010, at 04:49, cctalk-request at classiccmp.org wrote: > > Message: 15 > Date: Mon, 17 May 2010 00:00:19 +0100 > From: Roger Pugh <rogpugh at mac.com> > Subject: > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk at classiccmp.org> > Message-ID: <4BF07903.2000805 at mac.com> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > >> Possibly, I am roughly equidistant from M20 J8 and J9. Where are you? >> >> If I arrange to share a car I won't let apathy reign on the day. >> >> My best MPG car is about 23 so maybe not one of mine though my supercharged Daimler V8 is very luxurious, it only does 17 mpg! >> >> Roger Holmes. >> >> > Roger > I'm a few miles south of Gatwick on the M23 > > Transport options are > > 55MPG SAAB 9-3 > 30MPG Citroen Berlingo > 19MPG Bristol > > So forgetting the gas guzzler classic its a SAAB 4dr or a Van with seats > for more load capacity. > > > roger Hi Roger, I'll mull that over, Gatwick is over an hour away. I guess it depends if you go clockwise or anti-clockwise around the M25 (or through the middle of London). My main classic computer is too big to take (Needs a couple of tail lift lorries and 3 months to re-assemble). Roger.

16 years, 1 month

2
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IBM System 360 Model 91 operator console from 1969

by alexeyt＠freeshell.org

On Wed, 12 May 2010, dh wrote: > Sorry I forgot . here is a picture. > > http://www.thegalleryofoldiron.com/36091CART.JPG Holy crap, that is a lot of lights. I think that may be more lights than on all the machines I have put together... Does it display every register in the machine? How big is the cable that carries all those signals??? Alexey

16 years, 1 month

1
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Anyone want a Creed teleprinter or got an Elliott paper tape reader head ?

by roger.holmes＠microspot.co.uk

I am still after an Elliott paper tape reader head, preferably 1000cps but the 300cps would be acceptable. I have a Creed 7E which is a 5 bit teleprinter. The covers are missing and I have not tried powering it up yet. Someone has attached a DIN audio type plug to it, and a friend suggested maybe it had been connected up to a BBC micro. Anyone want to do a trade, either barter or for cash on either of these. I expect to be going to VCF England or whatever its called. I am in the UK, in the Low Weald of Kent to be more specific. Roger Holmes

16 years, 1 month

1
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Microcornucopia Magazine

by elazzerini＠interfree.it

Hi at all, today i begun to scan my issues. At this moment i done MICRO CORNUCOPIA No.14 Oct 1983 http://web.tiscali.it/enrico.lazzerini/MICRO_CORNUCOPIA_No.14_Oct_1983.pdf and MICRO CORNUCOPIA No.16 Feb 1984 http://web.tiscali.it/enrico.lazzerini/MICRO_CORNUCOPIA_No.14_Oct_1983.pdf Is out there who has issues from 1 to 11 and would scan some his issues??? I think this would be the only change we have to : - gain issues we not have - save this wonderful past and defunt magazine Regards Enrico

16 years, 1 month

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