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101090 discussions

printer ribbons and print wheels - free for shipping

by jack.rubin＠ameritech.net

DEC - DECwriter L180 Reorder Spool #152 LQP01-KA LA75R (qty 2) Diablo - 8R2986 (black multistrike) - qty 8 printwheel 9R87019 pica 10 Teletex - qty 2 printwheel 9R87097 elite 12 Scientific - qty 2 Please let me know if you're interested ASAP. In the trash on 11/30 if unclaimed. Jack

15 years, 5 months

trying to save a GPS

by rescue＠hawkmountain.net

I know this isn't old... but I'm trying to rescue an Omnitech 16878-US GPS from the recycling bin..... It boots, gives the Go!, Maps, and Setting icons, you can touch any of them, get a click sound, and then... locked up solid. I applied a 'quick fix' from them, but that didn't fix anything. I believe that it is more likely the software on the SD card has gotten damaged somehow. Anybody have one of these ? Would like to get it working. It is a WinCE 5.0 based PDA basically (restricted to run the software provided of course). -- Curt

15 years, 5 months

Punched cards - which paper/cardboard?

by roger.holmes＠microspot.co.uk

> From: Philipp Hachtmann <hachti at hachti.de> > > I'm thinking about making punched cards. I could need some information about the material used for > them. Precise information about tolerances, specifications, references to more information, and so > on would be quite helpful. I have read the follow up e-mails too and wonder why you want to do this. If you want cards for storing data why do you need to print on the cards first? I have a loads (110,000) of cards of the right shape which I use for my mainframe. They are already printed up with every two columns marked out as one column of mark sense boxes but of course the mainframe doesn't see the markings. I have probably more than I will ever need in my lifetime. I even use them for keeping hand written notes and my ex-ICT engineer friend folds them in two, pushes the pins of a PCB through them and marks the bay number, carrier level and card position the card came from on them. If you want, I can sell you some at less than the commercial suppliers rate and I think less than they would cost to tool up to make them. Carriage is of course another question. I have been buying up local supplies of 11" by 14.5" fan fold paper for less than the carriage costs from say 50 miles away. I see your suffix is .de, I guess that's Denmark or is it Germany? At least there'd be no customs issues but I would think carriage would still be quite expensive. I'm not sure my card equipment would be happy without rounded corners. I know there were hardware modifications listed for dealing with cards with and without diagonally cut corners at leading/trailing edges. There's also the possibility of paper cuts for the operators. I think my IBM 029 keypunch uses the rounded corner to push the card guide down when it registers the card at the punching station. I think a square cut card would jam up.

15 years, 5 months

Ugh, I think I am going to be sick...

by lynchaj＠yahoo.com

http://www.classiccmp.org/pipermail/cctalk/2010-November/294055.html [Alexandre Souza] > Andrew, Am I wrong, or the 68000 IC is a **very common** microprocessor? >:oO I wouldn't call them common but certainly not rare either. It is the thought of really nice and still useful ceramic 68Ks being reduced to toxic sludge for a tiny bit of gold that bothers me. They could easily be sold for much more than the value of the metal recovery. eBay has them going for $8 to $50 or more each. Also amateur gold scrappers have a nasty habit of making a mess with their chemical waste. Andrew Lynch

15 years, 5 months

Ebay Sperry Unisys Boards

by leaknoil＠gmail.com

Anyone know what these are from ? The only card I find labeled microprocessor is facing the wrong way of course. Something military I'm guessing. http://shop.ebay.com/cieinternational/m.html?_nkw=vintage+computer&_sacat=0…

15 years, 5 months

Tektronix 4023 documentation?

by jonnosan＠gmail.com

I am continuing my exploration of the SacState 8008 boot PROM code (using James Markevitch's listing), and have a little more understanding of the escape codes I was asking about previously (in the thread 'identifying terminal by escape codes') It looks like the SacState machine was built as a card that plugged into a 4023 terminal motherboard. My current assumption is the data going out of the 8008 card (i.e. where the code on the PROM is running) is interacting with the other cards on the 4023 bus directly. My further assumption is that there must have been some kind of block device (tape or disk?) that was also on that same bus, and that some of the escape codes must be doing some sort of device selection (i.e. signalling that the next chunk of data is intended to be read from, or written to, a specific device, not read from keyboard or displayed on screen). I am not clear as to whether the other devices are interfacing via - a commercial 'dedicated' I/O card, e.g. a drive controller (if any existed?) - a commercial 'generic' I/O card, e.g. a serial I/O and an 'intelligent' device is being controlled - a custom made I/O card that plugged directly into the 4023 bus The only 4023 documentation I can find online is the User Manual, which has: - a list of bus signals, which confirm there are enough signals available to construct complex device I/O - a list of accessory cards, including a serial 'Data Communications Interface', a 'hard copy unit', and 'audio recorder card' (tape controller ). - a reference to a 4023 service manual, which has a 'theory of operation' which may describe enough of the bus protocol to work out how the 8008 PROM could be interacting with other devices on that BUS. So my questions are - - were any commercial accessory cards available for the 4023 other than the ones listed in the back of the user manual? If so, does any documentation for them exist? - is the 4023 "service manual" available through any means? Cheers Jonno

15 years, 5 months

Ugh, I think I am going to be sick...

by tshoppa＠wmata.com

>>> Check out ebay auction 190467284114 and you can clearly see there are >>> DIP64 >>> MC68000 CPUs going to the scrapper bin. >>> This is painful to see especially knowing the S-100 68K CPU board is >>> entering build and test. I know builders will be looking for these parts >>> soon. >>> The DIP64 68000 CPUs are still available though this seems like such a >>> waste >>> to scrap classic ICs. I think it is tragic. >> Andrew, Am I wrong, or the 68000 IC is a **very common** microprocessor? >> :oO > They could easily be sold for much more than the value of the metal > recovery. eBay has them going for $8 to $50 or more each. Also amateur > gold scrappers have a nasty habit of making a mess with their chemical > waste. E-bay pricing can be bizarre and I would argue is not always representative of the "real world". Jameco lists Ceramic DIP64 68000 (pulls almost certainly) for $9.95 and I would expect them to work. Jameco used to have early dynamic DRAM's and shift registers By the metric buttload (e.g. 1103's, 2504's) presumably pulls but In other cases maybe a little closer to "floor sweepings for hobbyists". Having worked with 1103's I would argue that by modern standards Even the "cream of the crop" were little above floor sweepings. Tim.

15 years, 5 months

Looking for a Franklin high speed digital printer.

by wlsilva＠sbcglobal.net

Hello. Looking for a Franklin high speed digital printer, these were made in the 1960's and early 1970's. The printer is a rack mount unit, and prints on adding machine width paper. If you know of one, or even any information or manuals I would be extremely grateful for the help! I have more information on the unit if anyone can help. Best regards :) Walter

15 years, 5 months

Epoxy potting removal ?

by scanning.cc＠gmail.com

I have a critical ( late 80's microprocessor controlled ) piece of test gear no longer supported. The power supply is dead and after sawing through it's exoskeleton I was meet with a large epoxy block the size of the original box. I don't intend to fix said power supply but rather to figure out what voltages it provided and use a modern switcher. I know I need +12 and +5 as there is a generic floppy drive and the logic / processor uses +5. Any ideas how to strip the epoxy other than digging through it with implements of mass destruction ? Any and all help is appreciated. Best regards, Steven

15 years, 5 months

Ugh, I think I am going to be sick...

by tshoppa＠wmata.com

> I was once buying some 2114s from Jameco and got a bad > batch. I contacted them and they told me how they work. > First, if it is known to be pulls, they state that up front. > Most of the older chips are from stock rooms of companies > that are clearing older stock or have gone out of business. > As such, the parts are untested. They could have been bad > parts from a production line that someone was collecting > or just some NOS. They have no way to test them. Just my two cents: I would generally rather have pulls, than new or old stock of unknown origin. The pull was likely taken from a working system. The old stock of unknown origin..., well, who knows? After the electrolyte debacle of a few years back I am much more picky about electrolytics (known brand, known lot and manufacture date, and especially traceable lineage back to manufacturer as a result of counterfeiting) than with semiconductors! I generally expect a "usual distributor" (e.g. not Jameco) to be selling me new good stuff with paperwork and packaging traceable back to the manufacturer. Jameco... well they're many steps up from Poly Paks in quality and customer service but still I order a couple of spares :-). Tim.

15 years, 5 months

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