test-drb

test-drb@ccmp.vtda.org

101090 discussions

Heathkit H8 and other items on Minneapolis craigslist

by spam＠hell.org

Hey, all. I was browsing various craigslist places around the US and found someone selling off a substantial collection of classic micros outside Minneapolis His ad is here: https://minneapolis.craigslist.org/csw/sys/d/silver-lake-vintage-computer-c… Through our email chats I've determined that he has these components of an old Heathkit system of unknown workingness: H8 H17-3 floppy drive H17-2 drive chassis Zenith data systems ZVM-131 monitor Also, he has a terminal made by Data-100, for which I can't find much info but I suspect will be a 3270-compatible terminal of some sort. He also has a variety of micros, particularly some Atari 8-bit, Apple II , CoCos, and other things. The photos in the ad only show a fraction of what he has. He's not terribly knowledgeable - he came into this stuff as part of an estate cleanout and had 4 pickup truck loads of this stuff, so who knows what has been lost. I let him know that I would be posting here, so feel free to reach out to him directly. Anyway, I figured I'd post this here given that someone in the Minneapolis area might be interested in checking some of this stuff out, in a covid-compliant manner, of course... -mike

5 years, 11 months

Was looking for old suns

by silvercreekvalley＠yahoo.com

Hi Thanks for the replies with the Suns, hopefully I will be able to get one up and running :) As I should probably clear a bit of space in the ?office? - I have several bits of kit available. I?m in the UK. HP Visualise 86000 - complete system with keyboard/mouse - nice condition Several QBUS 11/53 machines with HD (5M I think), two pedestal, the rest ?rack mount? units. DEC alpha - not sure on model number but functional VAX 3000 - boots but needs restoration case is in poor condition. PM me if any of the above is of interest. I could probably ship some of the items. Thanks Ian

5 years, 11 months

Pdp cpus

by 821＠128.ca

Interesting stuff https://github.com/1801BM1/cpu11

5 years, 11 months

Fwd: Hopefully on topic

by crockett.martin＠gmail.com

Hi all, I now have just acquired a VT-100 and am in the process of checking it out. I noticed there is a capacitor that has vaporized, but I cant determine what value it is. I have the DEC VT-100 maintenance guide but it is very blurry in the relevant area. I cant even read the board designation. This is the area of the circuit, I can trace the 2 Zener diodes on the -23V rail, to one end of the cap, the other end seems to go to ground. The obvious culprit is C6, but that doesn't match the mud map of the board, as in C1x. https://imgur.com/a/tm8mn8b This is the capacitor in question. It looks like C1x where x is undetermined. I think it was a ceramic monolithic capacitor, it seems to be different to any other caps on the board, i.e. slightly larger and a different colour blue. When I look at this hires photos on Google images, it is the blue capacitor circled below Does anyone have a VT-100 and mind checking what the value of this capacitor is please? Ideally value and voltage or even just the nomenclature written on it, I can work out the value and voltage from that. Many thanks and Cheers, Martin...

5 years, 11 months

Looking for old Suns

by silvercreekvalley＠yahoo.com

Hi Kevin/Stefan/Salik Thanks for the replies much appreciated. Looks like there might be a few of these systems around, so will see if I can pick one up. Willing to pay a reasonable fee for a system of course. Thanks Ian

5 years, 11 months

Looking for old Suns

by salikmrafiq＠gmail.com

Have a chat with Peter Stokes peter at ashlyn.co.uk he has a number of older machines and some older SPARC station Salik

5 years, 11 months

At&T Unix PC, Tape drive

by emu＠e-bbes.com

Hi, during my move, I think I lost my tape drive, which was attached to my at&t unix pc (68000 based). Anybody knows of the top of their head, if I could read the tapes on any other machine? Was it anything "standard", or did they do their own at at&t? Cheers & thanks!

5 years, 11 months

Guy on vcfed offering old IBM lamps

by cclist＠sydex.com

He says "free for shipping". http://www.vcfed.org/forum/showthread.php?74590-FS-new-(OEM)-IBM-computer-5… I couldn[t get him to post a photo. He says he also has a bunch of old transistors from the Endicott plant. FWIW, Chuck

5 years, 11 months

DIY Paper Tape Punch - Mechanism diagram?

by anders.k.nelson＠gmail.com

Hi all, I've had a paper tape reader for a while but never had a punch to make new tapes, and the ones i've found are not only very large but also very expensive. So I'm toying with the idea of making an open-source punch, but I can't find any detailed diagrams of how the mechanism works. I'm assuming (without any data to back it up) that there is a cam, an array of spring-levered pins, and horizontal spacers controlled by solenoids that bridge the gap between the cam and each punch pin when called for. Does anyone have insight into how reliable/fast paper tape punches work? -- Anders Nelson +1 (517) 775-6129 www.erogear.com

5 years, 11 months

"scsi bus continuously busy"

by aperry＠snowmoose.com

Courtesy of a Raspberry Pi serving as the ND server, I am now able to load SunOS 3.5 over the network onto my 3/260 and it is now coming up into the OS. I am now seeing this error: >sc0 at vme24d16 200000 vec 0x40 >sd0 at sc0 slave 0 >si0: sc_cmd: scsi bus continuously busy >sc0: resetting scsi bus >sd1 at sc0 slave 1 >si0: sc_cmd: scsi bus continuously busy >sc0: resetting scsi bus The SCSI controller is the "Sun 2" SCSI card. I saw some corrosion-ish crap on the board and cleaned it off. It is SCSI, so, of course, I played with termination. No change in behavior. Is this likely to be a controller board problem or a device problem? Are these boards picky about SCSI devices? Any other suggestions? alan

5 years, 11 months

DIY Paper Tape Punch - Mechanism diagram?

by jfoust＠threedee.com

At 07:18 AM 5/1/2020, Hugh Pyle via cctalk wrote: >I've cut Mylar tape with a Glowforge laser. It cuts very nicely but the >alignment is a major hassle, plus you can only cut ~15" of tape which >doesn't go very far. Not worth the effort. If you were to build a custom >linear drive it might work. But also very slow. Hmm. You could have N fixed lasers at the spots of potential holes, and then a mechanism to move the whole assembly of them in the shape of a single hole, drawing them all at once. You could have one laser on that moved precisely along the hole row, and use the same sort of mechanical motion to draw a hole. How much laser do you need to cut paper, how much to cut mylar? Were there any paper tape devices that did not use the sprocket holes to move the tape? - John

5 years, 11 months

tape baking

by aek＠bitsavers.org

https://www.morressier.com/article/towards-understanding-thermal-remediatio…

5 years, 12 months

Lear Sieglar Terminal

by sales＠elecplus.com

I have in my shop a small blue old Lear Sieglar terminal. I does power on, but it gets a screen full of garbage. It is missing numerous keycaps. There are several cracks in the case around the keyboard. Asking $200; local pickup only. Pictures on request. Cindy Croxton Electronics Plus 1613 Water Street Kerrville, TX 78028 830-370-3239 cell sales at elecplus.com -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

5 years, 12 months

In search of Three Rivers PERQ 1 Keyboard

by ian.finder＠gmail.com

Title says it. It saddens me that in this day and age I have to call this out but: ? This is for use with an actual real PERQ 1, not a Raspberry Pi running an emulator, nor something I?m looking for because I like to collect only the steering wheels off vintage Porsches because they ?feel nice? or ?look cool? or will ?make me a better programmer.? Actually perhaps a better analogy involves elephants and ivory... but I?m now off topic. Anyway- cruelty free, no-poach, free-range use intended. Thanks in advance for any leads or on-topic discussion of the keyboard protocol to tide me over in the meantime... With all the time on my hands from the shutdown it?d be great to make this system whole and start down the long path toward restoration.

5 years, 12 months

Imlac/Hazeltine Dynagraphic terminals?

by derschjo＠gmail.com

Anyone have any idea if any Imlac/Hazeltine Dynagraphic terminals are still around? I've never heard tell of one beyond marketing information. These were late vector-graphics terminals made by Imlac Corporation after they got bought out by Hazeltine in the late 1970s. Any technical docs (programming, architecture) would be interesting to look at. And if anyone knows of one hiding in a basement somewhere... - Josh

5 years, 12 months

Game Of Life, John H. Conway

by emu＠e-bbes.com

Not really on Classic Hardware, but we lost John Conway to corona :( And I think, most of us tried it on a terminal before ;-) Enjoyu in full HD: https://www.youtube.com/watch?v=KaBm4etcYFQ&feature=emb_logo RIP!

5 years, 12 months

Wanted: Amiga 600 motherboard, NTSC

by ethan＠757.org

Looking for a working Amiga 600 NTSC motherboard. Would be interested in a was-working-before-cap-damage donor one as well. - Ethan

5 years, 12 months

Re: ODD I DID NOT SEND THIS? Blog: RetroRetrospective – Fun today with yesterday's gear…

by couryhouse＠aol.com

In a message dated 4/26/2020 3:37:46 PM US Mountain Standard Time, Michael at jongleur.co.uk writes: On Mon, 27 Apr 2020 at 8:32 am, ED SHARPE via cctalk <cctalk at classiccmp.org> wrote:-- Blog: RetroRetrospective ? Fun today with yesterday's gear??..Podcast:?Retro Computing Roundtable?(Co-Host)

5 years, 12 months

CRT from IBM terminal available

by p.gebhardt＠ymail.com

Hello list, I was contacted regarding the availability of a CRT from the terminal shown in this picture: http://www.robotrontechnik.de/bilder/Galerien/Computersammlung/Computersamm… Location is Germany. Please contact me offlist and I will establish the contact to the owner with you in case of interest. Best regards, Pierre ----------------------------------------------------------------------------- http://www.digitalheritage.de

5 years, 12 months

Did anybody ever came across the DEC CI750 User Guide?

by p.gebhardt＠ymail.com

Hello all, the headline says it all. DEC document number is EK-CI750-UG I've been looking for that one for years but never came across a paper copy or scanned document. Does anybody know where to get one? The technical description and the schematics are available, though. Thanks for any feedback on this. Best regards, Pierre ----------------------------------------------------------------------------- http://www.digitalheritage.de

5 years, 12 months

Emergency help needed

by sales＠elecplus.com

My warehouse got flooded. Is there anyone from Austin or SA that can help rescue kbds and old computers? Cindy Croxton Electronics Plus 1613 Water Street Kerrville, TX 78028 830-370-3239 cell sales at elecplus.com -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

5 years, 12 months

Got the RX01's running and TSX

by cz＠alembic.crystel.com

So I got the RX02 drive up and going with the RXV11 controller. Man it's interesting to hear those old disks *click*. Both work (which is good) and now I'm starting to look through my old disks. Interesting issue: Many of my disks are formatted RX02. So I need to dig out my RXV21 controller from some box around here and see if that works. I never liked the RXV21: It's only 18 bits, does DMA, and is quite weird in a 4mb pdp11. But I would like to get this data off. I also uncovered my old TSX disks. I have TSX+ 6.5, 6.4, and TSX 5.something here on double sided RX02 disks. Looks like my support contract ran out in 1991, I'll have to see about renewing that.... Anyone here still running TSX, or did everyone go to RSX11M+? C

5 years, 12 months

IBM DCS/DCOS--how common?

by cclist＠sydex.com

This talk of old tape brings up a question that I wanted to ask the list. I've run into some tapes that say they were prepared on the IBM DCS setup (7044-coupled-to-7094) running DCOS. I confess to never having run into the 7044 in real life--it always seemed like an odd machine--basically, a 7094 Jr. There couldn't have been very many DCS setups, am I correct? --Chuck

5 years, 12 months

LINC-8

by jnc＠mercury.lcs.mit.edu

> From: Bob Smith <bobsmithofd at gmail.com> > saw a comment that this belonged to CJL. Chris Lindblad? Sorry, I'm drawing a blank on someone with those initials who is connected with the LINC. > From: Jon Elson > Wow, those were fairly rare back when, and now there may only be a > couple in existence. Yeah, that's why I was hoping that someone connected to this community would get it, so we don't lose track of this rare artifact. I'd buy it, but i) it's not a PDP-11, and fails my 'PDP-11's only' test (intended to put a strict limit on the amount of junk I accumulate), and ii) I already have a whole bunch of PDP-11 gear I have yet to get to. :-( There's no way I would ever get to it. > Two complete CPUs, capable of running at the same time in shared memory > (I think). The documentation (1967 Small Computer Handbook) is unclear. It is clear that the general mode of operation was for only one CPU at a time to be running, but that appears to be to simplify programming (although it does say that "In the PDP-8 mode, the LINC subsystem is disabled"). The memory is indeed shared; it's on the PDP-8, and the LINC gains access via the standard PDP-8 'data break' (i.e. DMA) mechanism. Noel

5 years, 12 months

FedEX unsurance issues

by jnc＠mercury.lcs.mit.edu

> From: Paul Koning > I suppose they still charge you an insurance fee according to what you > declared as the value? Yes, IIRC. > This seems like a pretty clear case of fraud, and you should report it > to the authorities. Well, at the time, I thought it was just a local manager being a hard-ass; so maybe not worth the effort of taking further steps. Now, of course, it looks more like a policy change, but the incident I was a party to is now many months ago, so perhaps not optimal for reporting. Noel

5 years, 12 months

Jump to page:

2026

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

1999

1998

1997

test-drb