test-drb August 2010

test-drb@ccmp.vtda.org

161 participants
220 discussions

by chrise＠pobox.com

Probably a stretch but wondering if anyone has any info (manual, pinouts, service documentation) for a GNT model 3601 8-bit (1") paper tape punch. It was probably better known in the CNC / automated machining world than in computing but my hope is to resurrect it as a backup punch for copying tapes I use with my ASR-33 and thereby save wear on the -33's punch. The unit has serial and parallel interfaces on DB25 connectors but I do not have any pinout information for those. The serial one I can probably figure out. Unfortunately, the unit is a little more sick than "works OK" seemed to imply from the eBay seller. It has what I believe to be a power supply problem because as soon as you try to punch all eight holes with the front panel test button, the power LED dims and the punch jams, apparently from lack of umph to complete the mission. It could also be jamming to start with and that causes the power drop I suppose. In any case, looking for any docs before I open it up and start digging around. I have written to GNT without a reply so far. Chris -- Chris Elmquist mailto:chrise at pobox.com

15 years, 1 month

Mispronouncing acronyms

by tshoppa＠wmata.com

My favorite was an undergraduate computing help desk that Always managed to insist that the "vi" editor was pronounced "six". More than once I saw PDP-11 become PDP-II become PDP-2. And from the 70's onward I often felt a twinge of pity whenever I saw References to the ASC2 character set. Tim.

15 years, 1 month

For sale: Some DEC stuff

by hachti＠hachti.de

Hi folks, anybody interested in buying the following? - Omnibus core memories (tested good) - M8350 TTY interfaces (tested good) - RK05 disks for pdp11 (12 sectors) (used, new, tested, untested) - RK05/RK05J/RK05F disk drive (untested, tested good, broken) - RK05x spares - TU56 DECTape (tested working, untested, broken) - TU56H single DECTape - PC05 paper tape reader/punch - Some other Omnibus cards PDP8/M ******* A PDP8/M computer. Very nice (near perfect!) condition front panel. Chassis condition lower medium condition. Backplane and PSU (220V) ok. No top cover. System configuration to be discussed. First guess would be 12K core, TTY, CPU - all tested stuff. PDP8/L ****** PDP8/L minicomputer, untested, keys bleached out by sun. Untested (really untested, currently don't have the time to repair the machine) but complete with the 4K core stack. 110V Keys kan be used from a pdp8/e - they're the same. But not from pdp8/m. Those have the wrong colour. The PC05 is a strange machine: The reader portion of it was used on a pdp8/e (PC8E interface). Normally you use PC04 for pdp8 computers. The reader part seems to be compatible. The punch part is untested. Mechanics look fine. I guess that there are also missing boards on the punch side. Nice condition though. No cover, 110V. Location: Northern Germany (Hannover, Kiel). Open for reasonable offers. Can send packages up to 30kg. TU56 can be shipped in two packages. pdp8/m fits a package. 8/L cannot be shipped internationally. Kind regards, Philipp -- http://www.hachti.de

15 years, 1 month

Toshiba 3100/20

by Martin.Stransky＠emerson.com

Hi, Are you still there in 2010? :-) I need to read data from my friend's old Toshiba PC with HDD 26 pin connector. I would need to know what are the signals, or what is the adapter. Could you provide some schematics? thanx martin stransky | UPS engineer | Nove Mesto nad Vahom Emerson Network Power | Piestanska 1202/44 | 91528 NOve mesto nad Vahom T +421 32 7700 423 www.EmersonNetworkPower.com <http://www.emersonnetworkpower.com/>

15 years, 1 month

PDP-11/44 mystery card

by bqt＠softjar.se

Pontus Pihlgren <pontus at Update.UU.SE> wrote: > Hi > > I've acquired two PDP-11/44 and have just now gone throught the list of > cards in the cpu-boxes and the spares. Here is a list: > > http://www.update.uu.se/~pontus/slask/11-44-kort.txt Nice! You'll be able to put together atleast one really nice 11/44 from that. I notice one FP11 in the list. > Also I wonder what the > "M7251 KG11-A U Network interface XOR and CRC block check option" Just what it says, Network interface XOR and CRC block check option. :-) Ok. The long answer then... You know about CRC-16 I assume? This is hardware to generate that. You shove data to the card, one word at a time, and you can read out the CRC value. This card is, however, not very popular or useful, since software CRC routines are actually faster on the PDP-11. DECnet can use this card if you have it, but it's recommended that it not be used for this fact. (The card is actually more generic, and can be used to generate any kind of CRC checksum, not just CRC-16.) > "M3110 DRCSA U Protocol assist #1 w/special character check and CRC (DEC/DLC/DRCSA)" > "M3111 DRCSA U Protocol assist #2 w/special character check and CRC (DEC/DLC/DRCSA)" No clear idea about those two... Johnny -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt at softjar.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol

15 years, 1 month

Apple Lisa 1 for sale

by sellam＠vintagetech.com

I have an Apple Lisa 1 for sale. Yes, it has the Twiggy drives. It includes the Twiggy systems OS disks (2), original Lisa 1 manual, keyboard, original Lisa (rectangular button) mouse. It works. Excellent condition. Normally I would not so brazenly hawk something but I need to raise funds for an imminent move of the VCF archives. I'm entertaining any and all offers. At a minimum, there should be three zeroes before the decimal point. Please contact me directly if you're interested. Photos and more detail will be forwarded upon request. Will ship galaxy-wide. Thanks! -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org [ Old computing resources for business || Buy/Sell/Trade Vintage Computers ] [ and academia at www.VintageTech.com || at http://marketplace.vintage.org ]

15 years, 1 month

Looking for TI SN75413 pin layout

by fjkraan＠xs4all.nl

Does anyone have some info in the Texas Instruments SN75413 ? I am trying to restore the front panel controls of an early Tandy Radio Shack hard disk (8 MByte!), but cannot find this chip info. The reverse engineered diagram is at http://www.xs4all.nl/~fjkraan/comp/trs80m2/driverboard.png, but as I do not have the pin functions, I cannot connect the lamp and switch part (this bit is missing) to the board. There is some info on Radio Shack hard disks online, but not for this old model. For some more context of the board see http://www.xs4all.nl/~fjkraan/comp/trs80m2/8megDisk.html. Fred Jan

15 years, 2 months

WTD -- ST506 style (MFM or RLL) hard drive and controller

by classiccmp＠philpem.me.uk

Hi guys, I'm toying with the idea of doing an MFM/RLL hard drive bolt-on for the DiscFerret (seeing as the DF hardware is basically done now -- I'm just doing a final design check before I send the PCBs off for manufacturing). Problem is, I don't have a drive to play with. Does anyone have any or all of the following kicking around? - MFM or RLL hard drives. I could do with one or two of these; anything's good, as long as it has an ST506-style interface (that is, straight MFM/RLL with no funny business) and is believed to work. I'm ideally aiming for something "of reputable manufacture" -- so not a Kalok Octagon! - Cable kit for the above. So that's the Data and Control cables -- edge connector to IDC plug. - MFM/RLL controller to match the drive. Anything goes here -- e.g. Western Digital WD100x series, DTC, Omti... as long as I can make it work with the drive for long enough to format the drive and 'dd' some data onto it. I'll even consider SCSI-to-MFM bridges if they can be relatively easily tied to a modern PCI, PCIe or USB SCSI card (say, an AHA2940). I'm happy to pay reasonable market value for the above, but that doesn't extend to paying ?390 for drive-on-its-own (read: drive that's had the PCB removed and is basically useless) on "that online auction site"... Thanks, -- Phil. classiccmp at philpem.me.uk http://www.philpem.me.uk/

15 years, 2 months

Cray 1 replica

by ggs＠shiresoft.com

Hi, I just came across this and it's pretty cool. Some has built a somewhat functional 1/10 scale Cray-1 using a Xylinx dev board. Here's the link: http://chrisfenton.com/homebrew-cray-1a/ TTFN - Guy

15 years, 2 months

using localtalk bridge

by jlobocki＠gmail.com

has anybody tried localtalk bridge ( http://docs.info.apple.com/article.html?artnum=60290 ) in their mac setups? I was thinking of taking one of my old LC slabs and throwing a $10-$20 ethernet card in, throwing a phonenet dongle on the modem port, either loading the hard drive with a low os with all but the needed extensions and files removed, or the same on a floppy, and just using it like a router, with its only purpose being passing data between the apple ethernet segments and the apple phonenet segments(which at this time is only my SE as every other mac has ethernet).

15 years, 2 months

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test-drb August 2010