test-drb October 2015

test-drb@ccmp.vtda.org

195 participants
329 discussions

by jws＠jwsss.com

These are the cards in the DecServer 550. Looks to be an expansion chassis with 108 ports or so. Thanks Jim Photos of the DecServer 550 https://drive.google.com/folderview?id=0B4AXJXpUCE-hQ2lsc2lqS3VHd0U&usp=sha…

9 years, 2 months

Has anyone hear of the Computer History Archives Project?

by christian_liendo＠yahoo.com

I found a channel that's about a Month old, but no real information as to who they are. Computer History Archives Educational Vintage Computer Films View on www.youtube.com https://www.youtube.com/channel/UCOyJD0RHtF_77_oAf5tT1nQ

9 years, 2 months

looking for Siemens T100 telexes in the US

by simski＠dds.nl

Hi All, I was contacted via the greenkeys list for my spare parts of the two T100 telexes, but I think it should be possible to obtain them in the states. Is there someone willing to part of their broken or otherwise non/half functional T100 in the usa. they need the parts for a movie. -- Met vriendelijke Groet, Simon Claessen drukknop.nl

9 years, 2 months

LA-36 DECWriter II Keyboard Assembly

by rickb＠bensene.com

Hello, all, I have an otherwise good DECWriter II (LA-36) terminal that has a bad keyboard. A number of the keyswitches are messed up (the little gold contacts are mangled or the switch assembly itself is damaged), and the nature of the Cherry-made keyboard in this thing is that the keyswitch modules are not individually replaceable. I'm querying the list to see if anyone out there may have a parts LA-36, or a spare keyboard assembly for same that I can get my hands on. I'd like to get this thing running again, but with a bad keyboard, even though it all works great (I can test that the keys that are messed up are scanned properly by shorting across the PCB traces and the terminal responds appropriately), it's pretty much useless. Somewhere in the life of this machine something HEAVY fell/dropped on the keyboard, and about 1/3rd of the keyswitches ended up getting mangled as well as some of the keycaps. The only option appears to be to find a replacement for the whole keyboard assembly. Thanks in advance, -Rick --- Rick Bensene The Old Calculator Museum http://oldcalculatormuseum.com

9 years, 2 months

VT100 and/or VT105 rescued from scrap

by billdegnan＠gmail.com

> > > -----Original Message----- > From: "william degnan" <billdegnan at gmail.com> > Sent: ?21/?10/?2015 12:51 > To: "General Discussion: On-Topic and Off-Topic Posts" < > cctalk at classiccmp.org> > Subject: Re: VT100 and/or VT105 rescued from scrap > > On Wed, Oct 21, 2015 at 6:19 AM, Rod Smallwood < > rodsmallwood52 at btinternet.com> wrote: > > > VT 100's have one weak point. The monitor is a bought in part from Ball > > Bros. > > The Ball supplied drive board burns up a diode and cap. It will be > > obvious on inspection of the board. > > I have never been able to get a circuit diagram or I'd do a replacement > > board. > > > > Needless to say the DEC parts are mde of sterner stuff > > > > Rod > > > > > Is that true of the vt102 as well? > Bill > > On Wed, Oct 21, 2015 at 8:10 AM, Robert Jarratt < robert.jarratt at ntlworld.com> wrote: > I had forgotten about that. There is a useful page on this somewhere, but > I am away from home and can't get the link right now. Will try to send out > the link later. > > Regards > > Rob > I have one of each, I use the VT102 for "every day" use and save the VT100 for holidays and leap year day, etc. Assuming the VT100 is more fragile...needs to be run periodically but not too much. Bill -- Bill

9 years, 2 months

Data General NOVA 4/C help

by henk.gooijen＠hotmail.com

I picked up the NOVA 4 last Thursday. I had help carrying all the stuff (disassembled) downstairs from the attic. At home I had to unload the van single-handed. Went well, although I felt my back that evening ... Today, I cleaned the rack, as all boxes were still on the floor. There was little dust, the machine was well taken care of. After the cleaning I mounted the hard disk drive on the slides. The hard drive is a model 6101-S2 (12.5 MB fixed disk). On the top plate of the hard disk is an 8" Qume floppy disk drive mounted. The hard disk and the floppy disk form one unit, never seen this construction before! The colored twisted-pair flatcable from the floppy drive goes to the hard disk and another colored twisted-pair flat cable goes to the NOVA 4/C computer, connecting on a paddle board using an edge connector. See my website: www.pdp-11.nl/dg/nova4/nova4.html After everything was connected I applied mains. The fans start to run, so far so good. Then I switch on the NOVA and then the hard disk unit. The POWER LED on the NOVA and on the hard disk is lit. I can hear the hard disk "hum", and when the humming sound stops after a few seconds the READY LED is lit. However, when I press RESET on the NOVA and then PR.LOAD, the READY LED on the disk flashes momentarily (brief), but nothing further happens. On the disk drive are (behind the panel) two small switches. One has the text "NORM" and "PROT", the other has several texts (forgotten), but with that switch you can set the hard disk as device 0 and the floppy drive device 1, or the hard disk as device 1 and the floppy disk as device 0. Basically you can set the boot device, as the machine starts from device 0. I have this from the accompanying documentation. When I put that switch in the other position and press RESET and then PR.LOAD on the NOVA, the floppy disk LED is lit for a few seconds, but I do not hear a head load ("clunk"), nor head stepping sounds. Of course, the floppy drive is loaded with a floppy disk. The label on the floppy says "opstart" (Dutch for start up). As the floppy disk access LED turn on, I guess that I can say that the NOVA itself is OK. As far as I know, I have the BERG connector put back on the pins where it was before I did the disassembly. That cable connects to the terminal. The question might be whether it was on the correct pins for starters. I do not get any character(s) on the Dasher D200 terminal that came with the system. For that reason, I assume that the terminal settings match the settings for the NOVA. One more remark. On the hard disk is a red label glued. The text on it says "remove 2 shipping brackets before operating unit unlock pivot arm (see over)". On the rear side of the label is a drawing that shows the "front left corner". At the side is a screw (???) to lock/unlock the head(s). However, I just don't understand the drawing and cannot localize that screw. I mailed the previous owner whether he remembers something ... Anybody has info on the 6101-S2 disk drive? A drawing of those shipping rackets, and more info about head locks? Thanks, - Henk

9 years, 2 months

PDP8 / ETOS

by jnc＠mercury.lcs.mit.edu

> From: Rick Murphy > Lots and lots of fun like that. What an space optimizer would do if > there was one. :) Wow. You did all that by hand? If so, with a program that big, wouldn't it have made sense to try and write a separate post-processor to do all those optimizations? Surely it wouldn't have been that much work, compared to going through the entire compiler output! Noel

9 years, 2 months

Firing up old printers

by trash80＠internode.on.net

As I gradually get my long stored collection out of boxes and onto benches I'm starting to turn my attention to a lot of old dot matrix printers I have. I seem to recall reading or hearing a very long time ago that where a printer has not been fired up for eons that the pins can be stuck in the print head (e.g. by old ink drying out) and cause damage (e.g. bend pins) when it tries to print. I'd be most grateful for any advice on anything I need to do before hitting the print command. Thank you!! ++++++++++ Kevin Parker ++++++++++

9 years, 2 months

Is it live [WAS:RE: Oddball floppies for trade - 8", HS (outer edge), weird cutout]

by t.gardner＠computer.org

As it turns out the ownership of the Ella tapes is uncertain so Imation/Memorex can't use them without a fight. But there were several other artists, along with the breaking glass that can be used. Imation paid $300 million for the brand - shows the power of a brand. tom -----Original Message----- From: Al Kossow [mailto:aek at bitsavers.org] Sent: Monday, October 19, 2015 10:20 AM To: cctalk at classiccmp.org Subject: Re: Oddball floppies for trade - 8", HS (outer edge), weird cutout On 10/18/15 6:00 PM, Chuck Guzis wrote: > it's truly amazing that Memorex still exists--as a brand of Imation. > Thank Ella Fitzgerald "Is it live, or is it Memorex" http://www.totalmedia.com/content/trivia-and-tips/maxells-chair-man-hell-bl…

9 years, 2 months

The KIM Uno -- a modern clone of the KIM-1

by lproven＠gmail.com

Just learned of this via a tweet from a former colleague: ? The KIM Uno is a small "open-source hardware" project to build a replica of the classic 1976 KIM-1 computer. It doubles up as a 6502 programmable calculator. It costs about $10 in commonly available parts (board & parts without case or power supply), but provides a faithful KIM-1 'experience'. An atMega328 (Arduino Pro Mini, actually) mounted on the back of the board contains all the logic and memory. ? http://obsolescence.wix.com/obsolescence#!kim-uno-summary/c1uuh -- 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 Cell/Mobiles: +44 7939-087884 (UK) ? +420 702 829 053 (?R)

9 years, 2 months

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test-drb October 2015