test-drb April 2016

test-drb@ccmp.vtda.org

203 participants
299 discussions

by aaron＠aaronsplace.co.uk

Hi all, Can anyone offer any advice on where to find classic computing equipment in the UK? I've been keeping an looking for a terminal such as vt220 for quite a while now on eBay without much luck. Maybe I just don't know the right people? Thanks, Aaron

8 years, 3 months

Have VAX 82x0/83x0 console floppies been archived?

by derschjo＠gmail.com

I also picked up a VAX 8350 today (it was a productive afternoon). It came with a box of maybe 40 RX50 floppies for console and various diagnostics. A cursory Internet search didn't reveal whether these have been archived already. If they haven't already been archived somewhere, I'll take care of archiving them later this week... Thanks, Josh

8 years, 3 months

4.2BSD TU58 distribution tape for VAX-11/750?

by derschjo＠gmail.com

Hey all -- I'm researching what I need to have on hand to get 4.2BSD installed running on my 11/750. I'm pretty close to having mass storage working, I have a SCSI TMSCP tape controller that should do the job in conjunction with a SCSI 9-track drive, and the VAX itself seems to be happy. What I don't have is a copy of the TU58 cassette that would have been provided with the 4.2BSD distribution (at least, according to the installation documents). This contains utilities for formatting the disk and copying the root filesystem (from a *real* tape drive) to the root partition, so they're pretty essential for bringing a machine up >from scratch. If I had a SCSI *disk* controller, I could cheat and do the installation on SIMH (which avoids using the TU58 by cheating in a different way) and DD the whole thing over, but I'm not so blessed. I can't seem to track down a copy of this TU58 on the 'net -- anyone have one squirreled away somewhere, or know where I should be looking? Thanks, Josh

8 years, 3 months

Vt 103 / lsi 11/23 marketed as a desktop late 1980

by billdegnan＠gmail.com

Prior to the DEC Rainbow, Chrislin Industries was marketing the 11/23 with vt103 as a desktop computer. This is a 3rd party vendor. Maybe they were on to something... Bill Degnan twitter: billdeg vintagecomputer.net

8 years, 3 months

COSMAC Elf switch panel using PCBs

by spacewar＠gmail.com

I built a new Elf switch panel, but this time I used two printed circuit boards for the switches and the bezel. The bezel PCB has white soldermask with black silkscreen. The next revision will have black soldermask with white silkscreen, and the legend font, weight, and positioning changed to more closely match the original Elf photo in Popular Electronics. https://www.flickr.com/photos/22368471 at N04/sets/72157667455777465 The 20-pin header has the same pinout as Bob Armstrong used for the Spare Time Gizmos Elf 2000, but I don't presently have an Elf 2000 to test it with. For now the main intent is to use the panel for a new version of my FPGA Elf. I'm not sure whether I got the wiring of the LOAD switch correct; the Elf 2000 documentation refers to normally closed and normally open contacts of that switch, but for a toggle switch that doesn't make any sense to me. If anyone can tell me which pins of the Elf 2000 connector are grounded when the load switch is active vs inactive, that would be appreciated. The 20-pin header should have been right angle; since I only had a vertical header on-hand, the ribbon cable had to be plugged in before the switches were soldered in place, and the switches are not flush with the switch PCB. The toggle switches and push-button switch are C&K 7101SDV3BE and 8125SDV3BE, respectively, which have 0.42 inch actuator, 0.28 inch threaded bushing with keyway, vertical PCB mount with V-bracket, gold contacts, chrome actuator finish, and nickel bushing finish. These particular C&K switch variants are not very common, so I'll probably use different ones in the future, without the V-bracket. I don't yet have enough of the red and white toggle caps, which are C&K 896803000 and 896801000, respectively. The red button for the push-button switch is C&K 801803000.

8 years, 3 months

Tadpole Sparcbook Hard Drive

by ben＠bensinclair.com

This is a long shot, but does anyone have a Tadpole Sparcbook 3TX hard drive? Their existence may be just a myth. -- Ben Sinclair ben at bensinclair.com

8 years, 3 months

FA: 5.25" floppy mailers

by cclist＠sydex.com

I just came across two unopened boxes (500 each) of 6"x0" 5.25" floppy disk mailers. Anyone want them? You can have them for shipping, FOB 97405. --Chuck

8 years, 3 months

First Retail version of MS-DOS was Re: Ibm s-100 system?

by cctalk＠ibm51xx.net

I am not sure if 5.00 was the first Retail version. I know that for fact there is a 3.2 version released in the blue plexiglass Microsoft retail packaging. The 4.x versions are usually gray boxed with some having OEM/new computer stickers. -Ali

8 years, 3 months

Ibm s-100 system?

by billdegnan＠gmail.com

Byte Jan 1981 page 204 refers to an IBM S-100 microcomputer system IBM demoed in Europe. Anyone here seen this machine or heard about it? Bill Degnan twitter: billdeg vintagecomputer.net

8 years, 3 months

WTB: Sun Voyager Bag, Oberheim Synthesizer

by ethan＠757.org

Two things on the hunt list: 1. Sun Sparcstation Voyager bag (the bag to put it in) 2. Oberheim Matrix 6, 6R or 1000 synthesizers.

8 years, 3 months

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test-drb April 2016