test-drb January 2014

test-drb@ccmp.vtda.org

224 participants
263 discussions

by b4＠gewt.net

Afternoon, I have the PSU operational again. 2 +12, 1 -12, and -5V are all present. These voltages could be wrong: (pin-wise) on J2. Pin 6: 4.97VDC Pin 5: GND Pin 4: GND Pin 3: -12.28VDC Pin 2: about 12VDC Pin 1: about 12VDC +/-24VDC are both present on J4 where they should be. The motors do not run and there is no voltage present at fuse F2 (the fuse OTHER than the line feed one. There is +24VDC present at the line feed one.) There is continuity between the -24V pin and the non-line-feed motor fuse. No fuses blow. With J2 disconnected, power draw drops from ~65W to ~42W. Several random resistors checked (in-circuit) that should measure 540Ohms measure about 588Ohms. No LEDs light up and there is no bell. No components are particularly warm to the touch with power removed. Anything with this taste wrong to you? I'm completely stumped. -- Cory Smelosky http://gewt.net Personal stuff http://gimme-sympathy.org Projects

10 years, 11 months

Teaching the binary system ...

by jdr_use＠bluewin.ch

... doesn't come much neater than this : http://www.ricardo.ch/kaufen/antiquitaeten-und-kunst/antike-technik-und-ger… Jos ( not my auction, just tought it neat.)

10 years, 11 months

Any interest in 2 old 680x0 Macs? Won't power on.

by lproven＠gmail.com

It's time they went, I'm afraid. Vintage 68020-powered Apple Macintosh LC - for spares or repair http://www.ebay.co.uk/itm/271372079309 Vintage 68030 Apple Macintosh IIsi - for spares or repair http://www.ebay.co.uk/itm/271372063205 Opening price 1p. In other words, as close to free as eBay will let me. -- Liam Proven ? Profile: http://lproven.livejournal.com/profile Email: lproven at cix.co.uk ? GMail/G+/Twitter/Flickr/Facebook: lproven MSN: lproven at hotmail.com ? Skype/AIM/Yahoo/LinkedIn: liamproven Tel: +44 20-8685-0498 ? Cell: +44 7939-087884

10 years, 11 months

Clear out of various computer detritus (Surrey,UK)

by colineby＠isallthat.com

Toby, I'm away for the holidays, but I'd love an original XT for a console to run my 5364. I might also be able to contribute a few systems your sale if it's for a good cause. I have a couple RS/6000s I could stand to offload. --Colin Tobias Russell <toby at pdp11.co.uk> wrote: >Hi, > >I've decided to have a clear out to raise some funds for the school club I >run teaching 7-11 year olds computer programming, electrics and engineering. > >So here is what I have looking for a new home: > >- Lots of micro-vaxes (pizza box style) >- Lots of microVax chassis (mostly unpopulated with cards) >- Various Apple IIs and Apple II peripherals >- Various terminals >- SMD drives >- BBC micros, Spectrums and ZX81s >- Atari 2600's (woodies, darth vaders and jr's) >- IBM PC/XTs >- Misc PDP-11 parts (a few QBUS chassis, RX50s, TU58s, TK50s, QBUS cards, >UNIBUS cards, PDP-11/44, RD,RF,RZ series hard drives) >- Lots of other assorted items > >If anyone is interested in anything or would like to visit and dig through >the stash get in contact. > >All the best, >Toby >

10 years, 11 months

CompuServe PDP-10 programming?

by RichA＠LivingComputerMuseum.org

I'm currently pulling the CIS-local code out of DECWAR in aid of installing it on the DECsystem-1070 (KI-10 #587) running at the museum. It would be very helpful to (1) talk to someone who programmed in Macro-10 on the CIS systems, or (2) at least find someone with UUO and programming environment manuals. (I don't see either CIS or CompuServe on Bitsavers, but I may be missing something.) Does anyone reading CCtech/CCtalk want to confess to having experience in these matters? Privately or publicly? Thanks, Rich Rich Alderson Vintage Computing Sr. Systems Engineer Living Computer Museum 2245 1st Avenue S Seattle, WA 98134 mailto:RichA at LivingComputerMuseum.org http://www.LivingComputerMuseum.org/

10 years, 11 months

Motorola 68008 (was Re: Retrospective on the Sinclair QL, 30 years later)

by cctech＠beyondthepale.ie

> >The ST's floppy controller is the COTS WD-1772, and that series of controllers >was extremely popular in a lot of 8 bit machines. The 1770 is a familiar number >to me as being the one they had to bodge into the BBC Micro because supplies of >the controller it was designed to use had dried up. > Indeed. The BBC Micro originally used the 8271 which was replaced by the 1770. > >Its sound was basically the Yamaha AY-3, a chip that as pretty impressive for >its time and again appeard on many eight bit machines such as the BBC Micro >(again) and newer ZX Spectrums. > The BBC Micro used the 76489 for sound. Regards, Peter Coghlan.

10 years, 11 months

Older IDE hard drive to USB

by kylevowen＠gmail.com

I bought a cheap USB to ATA/ATAPI bridge a while back and have had a good bit of luck connecting various IDE drives to my laptop for imaging purposes. However, I have a few drives that simply won't mount under Windows or OS X, despite being detected by the Device Manager in the case of Windows. It seems to be narrowed down to the smaller drives, like under 2 GB or so. For instance, I have a Maxtor 7213AT 210 MB drive that won't mount, although an 80 GB Seagate has no trouble at all. The Maxtor is a known-good, bootable MS-DOS 6.22 drive. Has anyone encountered this? Besides connecting it to a motherboard with built-in IDE, are there workarounds? Thanks, Kyle

10 years, 11 months

Atari Portfolio with tons of accessories for sale

by shawn＠thekompany.com

$100 plus shipping. Has extra cards, serial, parallel ports, manuals and soft shell case. -- Regards, Shawn Gordon President theKompany.com www.thekompany.com www.mindawn.com 949-288-3771

10 years, 11 months

things in medicine bottles

by dgriffi＠cs.csubak.edu

I'm sure many of you reuse medicine bottles for keeping small things like fasteners, passive electronic components, etc. I'm sure you also will throw away lots of bottles rather than peeling off the labels because the process can be slow and leave messy partially-delaminated paper, and stickum all over. Here's something I learned recently from my pharmacist: A prescription label will come off cleanly if you try to take it off within a couple days after being stuck on the bottle. So when you get your meds home, take the label off, stick it on your forehead, then put it back on the bottle. When the bottle is empty, the label will peel off cleanly and easily. Skin oils do the magic. This is also helpful for more secure destruction of the label. -- David Griffith dgriffi at cs.csubak.edu

10 years, 11 months

TI vs HP

by mtapley＠swri.edu

On Jan 10, 2014, at 7:32 AM, ARD wrote: > But you could not add a card reader to > a TI58 to make it into a TI59 (and I always thought it was a pity there > was no TI59-C). Agreed on the TI59-C! A friend of mine who owned a TI-58 ordered a TI-59, decided it was not suitable, and returned it. Somehow his TI-58 was subsequently able to read magnetic strips. I assume somewhere down the line, someone came to be in the possession of a TI-59-shaped mag card piggy bank? Right, there was no official way to add a card reader? :-). > Of coure the HP41 could _later_ be expanded with the extended memory > modules, but those were not avaialble when the machine first came out. So > you would probably not have considered those. Had I paid much attention to the four ports on top of the machine, I might have. But you are right. > Incidentalyl, never try to > print non-normalised numbers on an HP97. The print routine gets confused > ans leaves the pritnhead turend on for too long. The result is a > burnt-out head. !! Good to know. Thank you! Pretty sure my Dad had use of an HP-97 at one point, but I think it has long since gone back to the university. > Every non-HP machine I've tried (TI, Sharp, Casio,...) gives 0. I?ll find out when I can, but I have at least one (years-old) project I need to finish first. > The TI59 uses a BP1A battery pack which is 3 AA NiCd's in a plastic > housing. No other internal electronics. The pack I have, so I can probably get the plastic housing open. Are they plain AA ni-cads, or do I need to order cells with solder tabs? Never mind, I?ll find out when I get there. > If you have a PC100 printer cradle, it will run from that without a good > NiCd pack anywhere. Sigh. I did, two moves ago. I have not seen it for decades, though. I fear it?s gone. > Or you can runn it from a 3.75V bench supply. There > is a TI59 service manual on the web (Google foudn it for me this morning) > which gives the polarity, etc. Thank you! That?s on my hard drive now. I did not find it the last time I looked! - Mark

10 years, 11 months

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test-drb January 2014