test-drb

test-drb@ccmp.vtda.org

101090 discussions

by commodorejohn＠gmail.com

The quick-'n-easy solution I found when I needed to model some parts for a keyboard was https://www.tinkercad.com/ - needs a modern-ish web browser and a modestly beefy system tho.

4 years, 4 months

Need Spectravideo SVI-328 parts....

by geneb＠deltasoft.com

I've got a very nice SV-328 that's had the sad misfortune of having the "K" key rather violently removed. (https://i.imgur.com/IxBIQTj.jpg) Can someone point me to where I could obtain a replacement key top and post? Thanks! g. -- Proud owner of F-15C 80-0007 http://www.f15sim.com - The only one of its kind. http://www.diy-cockpits.org/coll - Go Collimated or Go Home. Some people collect things for a hobby. Geeks collect hobbies. ScarletDME - The red hot Data Management Environment A Multi-Value database for the masses, not the classes. http://scarlet.deltasoft.com - Get it _today_!

4 years, 4 months

Ultrix-11

by petermallan＠gmail.com

I just installed Ultrix-11 3.1 using the ultrix31.tap file from https://pdp-11.org.ru/files.pl?lang=en which is the location from the comments in Stephen's Machine Room video on YouTube that I think started this thread. It installed just fine, but just like the video, I ran out of space on /usr. How can I make a larger /usr partition? Is it possible to do this at installation time? There did not seem to be an option for this. Can it be done by using an additional disk? That would seem likely, but not what a system manager back in the 70's or 80's would expect to need to do, especially as there is a relatively large amount of space left to create /user1. I noted the options for installing software using soft links to other locations. Was that the preferred method when installing additional software? Any help would be greatly appreciated. Cheers Peter Allan

4 years, 4 months

Tektronix XpressWare 8.1

by spectre＠floodgap.com

Bitsavers has 6.3 (thank you Al) but I'm trying to push my luck and find 8.1 for this XP421CH Xterm. Anyone know of where it can be found? -- ------------------------------------ personal: http://www.cameronkaiser.com/ -- Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser at floodgap.com -- FOOLS! I WILL DESTROY YOU ALL! ASK ME HOW! -- "Girl Genius" 8/29/07 --------

4 years, 4 months

Replicating IBM SLT/MST card interconnect

by stepleton＠gmail.com

Hi cctalk, I'm looking to replicate the 24-contact connector system that IBM used on SLT and MST cards for many years. Has anyone done this before? The best photos of this connector that I can find online are on this page: http://techandtrouble.blogspot.com/2014/04/happy-50th-system360-pt5-anatomy… I haven't searched Bitsavers documentation extensively for IBM specifications, but I've seen some details around page 54 of this document: http://www.bitsavers.org/pdf/ibm/logic/SY22-2798-2_LogicBlocks_AutomatedLog… I'm interested in reproducing both polarities of this connector: plug and socket. Also, even though the most familiar use of this connector is for board-to-board interconnect, I'm most interested in wire-to-board interconnect. IBM used this method for DC power connectors in its 5100, 5110, and 5120 computers. Here are images of this specific connector: http://stepleton.com/connector/ taken as still images from a YouTube video on the IBM 5120 by Jerry Walker ( https://www.youtube.com/c/JerryWalker-JMPrecision/videos). I've designed and built a device that monitors DC power supply voltages for overvoltage and undervoltage excursions and cuts off all power rails if any voltage goes out of spec. I hope to use it to protect my own IBM 5100 from major power supply faults like the one CuriousMarc encountered with his 9825T: https://www.youtube.com/watch?v=b-eN93L6yX8 In order to put my device between my 5100's power supply and the logic card backplane, I need to recreate a plug and a socket so that I can fashion a cable that goes out to my device. If anyone has created dependable modern versions of these connectors, would you mind sharing any pointers? Thanks for any help, --Tom

4 years, 4 months

DEC UNIBUS and use of cassette

by jnc＠mercury.lcs.mit.edu

> From: Bill Degnan > Was there a UNIBUS storage system that used a cassette player as the > storage device .., rigged to send receive signals via a serial card > connection. Yes and no. There is the TA11 Magnetic Tape Cassette System, which used the TU60 Dual DECasette Transport (I need to create a page for that in the CHWiki), but it uses a special controller card, the TA11 Magnetic Tape Cassette controller: https://gunkies.org/wiki/TA11_Magnetic_Tape_Cassette_controller There is a small cheap tape system which used a stock serial interface to talk to the computer, the TU58, but those used DECtpe-II cartridges, not standard casettes. Noel

4 years, 4 months

DEC ME11 Memory Expansion on eBay

by steven＠malikoff.com

I just saw there is an ME11 Memory Expansion unit on eBay (not mine), stamped 'M11'. https://www.ebay.com/itm/114941479208 Until seeing this one I had not heard of any other units out there apart from the one I recovered (ex-BHP steelworks) a few years ago. Mine was connected by a flexprint cable to a rebadged PDP-11/15. If anyone here ends up with it, I have an OpenSCAD model of the Mazak bracket p/n 1211221 that holds the regular 5-1/4" DEC fascia panel onto the front of the H-909 cabinet this unit uses. This is the same cabinet as the slimline PDP-11/05 and to be honest when I found the ME11 that's what I thought it was, and that the console and CPU boards were missing. I then found the fascia panel with the original brackets close by, and it fitted exactly. I've printed a few from PET and they work as well as the originals (including the threaded hole), so I could do a few more for whoever gets the eBay one should they want them. I am slowly scanning the ME11 print set too as I've not found any online copy out there so far. Steve.

4 years, 4 months

VENIX DISKS

by billdegnan＠gmail.com

Warner https://www.vintagecomputer.net/temp/venix/ ...contains photos of the disks I have relating to VENIX for the Rainbow. Bill

4 years, 4 months

John Nash

by count.arthur.strong.666＠gmail.com

Hi all! The book about John Nash ("Beautiful Mind'")[1] mentioned that he wrote computer programs: "Edward G. Nilges, a programmer who worked in Princeton University?s computer center from 1987 to 1992, recalled that Nash ?acted frightened and silent? at first. In Nilges?s last year or two in Princeton, however, Nash was asking him questions about the Internet and about programs he was working on. Nilges was impressed: ?Nash?s computer programs were startlingly elegant.?" Has anybody seen them? Are they available somewhere for downloading? Wondering... [1] https://en.wikipedia.org/wiki/A_Beautiful_Mind_(book)

4 years, 4 months

Ian Hirschsohn - DISSPLA, Superset Inc. and sad news

by jfoust＠threedee.com

At 12:56 AM 7/31/2021, Randy Dawson via cctalk wrote: >As some here know, I collect some dusty deck fortran graphics. We have MOVIE.BYU up and running! (Thanks Douglas Taylor and Emanuel Steibler). Once I was in the business of making 3D file format translators, and I still have code that runs under Windows that can read and write Movie.BYU format. - John

4 years, 4 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