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101090 discussions

looking for a 7-track reel tape controller

by michael.99.thompson＠gmail.com

> > thanks a lot for your hint to the DEC controller. I wasn't aware that the > TM11, TMA11 and TMB11 controllers can handle 9-track as well as 7-track > NRZI-encoded tape drives. However, all these controllers seem to be very > rare in the public out there. Not too surprising considering that DEC TU > and TS tape drives themselves are rare and that 7-track tape drives were > soon replaced by 9-track tape technology in the early days. > > With best regards, > Pierre > The TC58 Magnetic Tape Controller for the PDP-8 and the TC59 for the PDP-9 can be connected to both 7-track and 9-track drives. The TU20 drive on the PDP-9 at the RICM is a 7-track drive. The only difference between the 7-track and 9-track versions of the TU20 is the tape head. All of the tape drive electronics is the same for both versions. -- Michael Thompson

7 years

I need a keypunch (briefly)

by chip＠aresti.com

I was referred to this group by dave.g4ugm at gmail.com who thought you might be able to help me. I need to punch a half-dozen datacards for an award for a retired IBMer. Anyone know where I can find a working 026/029/129 within 300 miles of Raleigh, NC? Many thanks for any pointers. Chip Davis chip at aresti.com +1.919.271.2582

7 years

eBay: PDP-8/A KL8A serial line card

by jnc＠mercury.lcs.mit.edu

This item: https://www.ebay.com/itm/133136230586 is poorly titled, so people's searches might not find it; the M8319 is a KL8A 4 channel EIA RS232 or 20mA current loop serial hex I/O card for the PDP-8/A. Noel

7 years

Sun Sparcstation 20 with accessories in Dallas

by sales＠elecplus.com

https://dallas-tx.americanlisted.com/75228/computers-parts/sun-sparcstation- sun-drives_23232767.html $50 OBO for take all 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

7 years

VCF Midwest 14 Talks and Talkers

by silent700＠gmail.com

We can at last announce our speaker roster for this year's Vintage Computer Festival Midwest. I think we've got some strong topics and great variety this year, and even a little space to give Trixter a break from the A/V console. Check it out - and don't miss the cool new speaker bios page - click a speaker's name to read a bit about them: http://vcfmw.org/talks.html 39 days to go! -j

7 years

TI99/4A computers, in original boxes

by sales＠elecplus.com

https://www.elecshopper.com/texas-instruments-ti-994a-computer-in-box-black- and-silver.html Only 4 of these on hand. 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

7 years

RSTS/RSX manuals available in the UK

by binarydinosaurs＠gmail.com

Hi folks, I?ve held onto this collection of manuals for the last 3 years and now they really need to go because I?m having to move house in the next 2-3 months, my landlady is selling up. I thought it was too good to be true being in this house for 7.5 years! The RSTS manuals are V10 (1990) and there's 3 RSX-11M V4 as well as RSX DECNET. I don?t have the time to scan them myself otherwise I would?ve done ages ago. I?m heading past Jim Austin?s place in a couple of weeks? time so if nobody else is interested I can drop them off there if he?s up for it. Cheers, -- adrian/witchy Owner of Binary Dinosaurs, the UK's biggest private home computer collection? t: @binarydinosaurs f: facebook.com/binarydinosaurs w: www.binarydinosaurs.co.uk

7 years

IBM Series/1

by sieler＠allegro.com

> > > The hardware is excellent. They have fairly fast processors, and the > > I/O capacity is great. Reliability is typical IBM. > > > > The OS sucks balls. All the balls. > > > > Commercially, they were not a success, despite being IBM's first > > "open" system, in that they invited third party developers. It seems When I joined HP in mid-1979, the first week I spotted an IBM Series/1 in a small conference room ... with an IBM repairman. The HP engineers had apparently blown out a memory board somehow while "looking" at it :) >From the HP 3000 viewpoint, we weren't worried about the Series/1. Stan

7 years

MULTIPROCESSING FOR THE IMPOVERISHED Part 1: a 6809 Uniprocessor

by lproven＠gmail.com

1993 article on building a multiprocessor 6809 box. http://www.bradrodriguez.com/papers/6809cpu.htm -- Liam Proven - Profile: https://about.me/liamproven Email: lproven at cix.co.uk - Google Mail/Hangouts/Plus: lproven at gmail.com Twitter/Facebook/Flickr: lproven - Skype/LinkedIn: liamproven UK: +44 7939-087884 - ?R (+ WhatsApp/Telegram/Signal): +420 702 829 053

7 years

looking for a 7-track reel tape controller

by p.gebhardt＠ymail.com

Hello Paul, thanks a lot for your hint to the DEC controller. I wasn't aware that the TM11, TMA11 and TMB11 controllers can handle 9-track as well as 7-track NRZI-encoded tape drives. However, all these controllers seem to be very rare in the public out there. Not too surprising considering that DEC TU and TS tape drives themselves are rare and that 7-track tape drives were soon replaced by 9-track tape technology in the early days. With best regards, Pierre ----------------------------------------------------------------------------- http://www.digitalheritage.de Am Dienstag, 6. August 2019, 19:49:14 MESZ hat P Gebhardt <p.gebhardt at ymail.com> Folgendes geschrieben: Hello Paul, thanks a lot for your hint to the DEC controller. I wasn't aware that the TM11, TMA11 and TMB11 controllers can handle 9-track as well as 7-track NRZI-encoded tape drives. However, all these controllers seem to be very rare in the public out there. Not too surprising considering that DEC TU and TS tape drives themselves are rare and that 7-track tape drives were soon replaced by 9-track tape technology in the early days. With best regards, Pierre ----------------------------------------------------------------------------- http://www.digitalheritage.de Am Freitag, 2. August 2019, 07:04:02 MESZ hat Paul Koning via cctech <cctech at classiccmp.org> Folgendes geschrieben: It may depend more on what kind of tape drive you have. The DEC TU10 controller handles both? 7 and 9 track tapes. ??? paul

7 years

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