test-drb

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101090 discussions

by unclefalter＠yahoo.ca

Hey guys, Posting this to various forums in the hopes of finding someone in the know - I have this ASCI u68 system (6800 cpu) that I understand was used in educational environments. I kind of have it running but know little about assembly language programming, etc. Or the unit itself. Have any of you ever messed with these? It looks like it has a serial connector on its mainboard.. was trying to figure out a way if I could patch it to one of my terminals. Also trying to find some simple 6800 assembly programs/routines to test it and see if it really works properly. There is an MC6821S chip on it (there are three of them actually) and one in the middle is marked 'BAD'. I understand those handle peripherals. I'd also heard rumours there was a second board available for these that gave them BASIC. I've never seen such a board for sale anywhere - wondered if anyone had seen one in the wild. Brad

10 years, 9 months

nut bars? ;)

by mark＠markesystems.com

> From: "Jay West" <jwest at classiccmp.org> > Subject: nut bars? ;) <...> > Is there a modern source of nut bars that one could order with specific > thread size and # of holes (NEMA pattern)? Yeah, I know I'm being OCD and How about something from here? http://www.ebay.com/bhp/rack-rails I know they're not the floating-nut style you may have been thinking of, but they might work... ~~ Mark Moulding

10 years, 9 months

SWTPC CT1024

by unclefalter＠yahoo.ca

While I was fooling around with my ASCI I decided to test the serial connection to my PC. The only thing I had available was my CT-1024 terminal with the optional serial board. This unit never worked when I got it. Thought it was its ancient and probably non functional PSU, but after hooking it up to a bench PSU same issues: 1) Unstable video display with large whitish band in the middle. 2) No response to keypresses. 3) Field of blinking ? marks if cursor is switched off, garbled one line of random characters up top if switched on. When I connected it to my PC running PUTTY via serial cable, I fully expected it to do nothing. But to my surprise, it generates a continuous stream of Js (punctuated by the odd H) on the PUTTY screen if the RECV switch is off. If I hit Break, it generates a whole bunch of Bs. If I switch the RECV switch ON, the Js stop but I can still generate Bs with the Break key. One thing I'm wondering now that I've switched power supplies and the video situation isn't cleared up.. I'm wondering if this thing was set up to connect to a composite monitor at all? I've seen pictures of the CT1024 with a Sanyo monitor just like mine.. but on the Sanyo it does the same thing it does on all the others. Anyway, thoughts/ideas welcome. Would love to get this thing running again.

10 years, 9 months

Processor card for a HP 9835.

by phb.hfx＠gmail.com

I am searching for a CPU card for a 9835 to replace the dead processor in my 9835A, but a CPU card from a 9845B/C would also be ok. I would prefer the 9835 card as it would be a drop in replacement but with a 9845 card I would have to transfer over the CPU module. The part number on the module should be 5061 3001. Paul. phb.hfx at gmail.com

10 years, 9 months

Writing SCSI 9-Track Mag Tapes from Windows/DOS

by marc.verdiell＠gmail.com

Woot! I finally got my HP 7970E (yeah, a year in the making!), HP 88780, and Overland Data OD3201 9-track tapes all working at the same time. One on HP-IB, one on SCSI-1, and one on Parallel Port interface. Only my ever finicky Qualstars got jealous and decided not to play ball. Here is a family video: https://youtu.be/eCBxNhEzIfc The DOS computer is a vintage Dolch PAC 65. Thanks for all here who helped with tips, documentation and software. Marc

10 years, 9 months

Contents of DEC 8" floppies

by charlesmorris800＠centurytel.net

I bought a set of five DEC RX01 8" floppies (for the disks, since I have an RX01 hooked up to my PDP-8/A) but I thought the contents might be of interest to someone before I wipe them. They are labeled VAX PSI V3.0 1/5 thru 5/5, (c) 1984. In order they are AS-L154G-BE, AS-L155G-BE, AS-L156G-BE, AS-DC36B-BE, AS-DK35A-BE. I did email Al Kossow about archiving but maybe he didn't receive the message. Anyhow, if anyone is interested, please contact me off-list. I don't have a VAX so I can't read them. Perhaps we can trade for blank SSSD disks? thanks Charles

10 years, 9 months

Anyone know of Sun Voyager bags for sale?

by ethan＠757.org

Anyone know of any of the padded cases for Sun Voyagers that would be for sale? (Sun Microsystems portable sparcstation) -- Ethan O'Toole

10 years, 9 months

New logo: Vintage Computer Federation

by cctalk＠snarc.net

Cctalk'ers, Vintage Computer Federation -- the new 501(c)3 non-profit that now runs the MARCH museum, and which will soon make some major expansion announcements -- has a very cool new logo. Here's a preview: http://www.snarc.net/vcf-logo-preview.png. Hoping everyone likes it! - Evan

10 years, 9 months

The Burroughs B5900 and E-Mode

by COURYHOUSE＠aol.com

Amazing! I had not seen this - a great chronicle! It is important for all the folks to write up what they did... if they do not there will be no record... Ed# - _www.smecc.org_ (http://www.smecc.org) In a message dated 10/14/2015 6:34:04 A.M. US Mountain Standard Time, lproven at gmail.com writes: The Burroughs B5900 and E-Mode A bridge to 21st Century Computing By Jack Allweiss Copyright 2010 My name is Jack A. Allweiss, also known as ?The Father of the B5900 System?. I did not give myself that title, my friends and co-workers at Burroughs Corporation did, and I consider it a great honor. This true story is about the B5900, and why it was an important milestone for Burroughs and later Unisys, as well as the computer industry in general. ? http://jack.hoa.org/hoajaa/BurrMain.html

10 years, 9 months

Fair price and ways to find a teletype

by unclefalter＠yahoo.ca

I've been watching a lot of vintage computer videos put up by enthusiasts (thanks so much for that). I have been really fascinated lately by the Altair and teletypes, paper tape readers and so on. Just watching one fellow load BASIC into his Altair. you just felt the history and the connection to Bill Gates and all the pioneers of an era that was happening just as I was being born. I only ever see teletypes for sale on ebay, only in the US, and of course I don't bite because of shipping costs, plus usually people ask insane prices for them. I am wondering what a reasonable price should be for a unit with a paper tape reader, and any tips on how I might go about finding one beyond Craigs, etc, up here in Canada. And anything I should watch out for and so on. Thanks muchly, Brad

10 years, 9 months

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