test-drb October 2016

test-drb@ccmp.vtda.org

203 participants
312 discussions

For sale 128K Core RAM Industrial PDP 11/40 Massbus System

by COURYHOUSE＠aol.com

was Unix or C the one developed on the 11/20? Ed# In a message dated 10/30/2016 6:15:32 P.M. US Mountain Standard Time, elson at pico-systems.com writes: >> >> Bill > Unix? Probably a complete brain fart by me - but I thought Unix > required a machine with separate I/D spaces and the 11/40 wasn't one > of them? > > If I'm wrong that will be of some assistance to me actually :-) >

7 years, 6 months

For sale 128K Core RAM Industrial PDP 11/40 Massbus System

by jnc＠mercury.lcs.mit.edu

> From: Allison > Later versions like 2.9 and V7 do want I&D. V7 is only distributed with pre-built loads for split I+D machines (so you can't boot a V7 distribution tape on a non-split machine), but it includes machine-language OS support files for non-split machines. (It's similar enough to V6 that it makes sense that it runs on non-split machines.) > From: William Degnan > Given 128K core, wouldn't one be able to save the OS in core, no need > to load what would need to "get started" from a diskpak? To fork a process, Unix swaps the forking process out, and then fiddles system tables so that one of the two copies (I forget which, without looking at the code) becomes the child. This includes at startup, when the 'swapping' process (0) splits and the child (1) is set up to run /etc/init. (I found this out the hard way, when bringing up V6 under Ersatz-11. :-) So Unix won't run without a swapping device. Noel

7 years, 6 months

DEC bus transceivers

by jnc＠mercury.lcs.mit.edu

> From: Philipp Hachtmann > Very enlightening. > You're hoarding interface ICs with commercial second thoughts If you think either Guy, or Dave and I, expect to make much money selling the QBUS/UNIBUS boards we are working on, you are seriously confused. None of us are in this as a money-making exercise; there are easier ways to make a lot more money. And as to the hoarding, if you'd like to buy up a couple of thousand yourself, >from that miniscule stockpile of 30K units that Guy and I have left out there for you all, please let me know, and I'll expidite over a name, phone number, and email for you to contact. Noel

7 years, 6 months

PDP11GUI 1.48.5

by j_hoppe＠t-online.de

Guys, there's a new release PDP11GUI 1.48.5 Some enhancements: 1. "Disk Image Read/Write": - Now compression of 2word patterns (32 bit patterns), did reduce download of a RSX-11 system disk from 40h to 6h. - Fix for PDP-11/44 console firmware v 3.40: ignore "(Program)" output after driver start. 2. Terminal windows now beeps on char, necessary for some endless XXDP diags. Download from https://github.com/j-hoppe/PDP11GUI/releases/tag/1.48.5 Web: http://retrocmp.com/tools/pdp11gui Enjoy, Joerg

7 years, 6 months

For sale 128K Core RAM Industrial PDP 11/40 Massbus System

by jnc＠mercury.lcs.mit.edu

> From: Ed Sharpe > was Unix or C the one developed on the 11/20? Both. Unix Version 1 was written in PDP-11 assembler, for the -11/20; although that was a re-write of an earlier version written in PDP-7 assembler. C was developed from B in good part because the word address model of B (inherited from its ancestor BCPL) wasn't a good match for the PDP-11's byte addressing model. More here: https://www.bell-labs.com/usr/dmr/www/hist.html https://www.bell-labs.com/usr/dmr/www/chist.html > From: Christian Corti > I think the IP stack needs separate I/D and more memory I read that the networking code in 2.x uses Supervisor mode (apparently it needed more address space than was available with only kernel, even with split I/D). Noel

7 years, 6 months

Some pages from the 360-40 Development Manual, Hursley

by steven＠malikoff.com

I've pdf'd half a dozen pages of the 360/40 development manual from IBM British Labs at Hursley UK, early/mid 60s. I wish I had more but these only survived because dad used to bring home binders with these single-sided pages for us kids to draw on, and my parents kept them. They may not even be from the same document, but it's just for interest's sake. http://web.aanet.com.au/~malikoff/misc/IBM_360-40_Development_Manual_fragme…

7 years, 6 months

DEC DS10L Fix CPUFan!

by rlloken＠telus.net

On Sun, 30 Oct 2016, Jon Elson wrote: >> Thank you for the tips, i will see if i can open it up in someway, the fan >> is kinda like a laptop blower style, but a bigger version of it :) I think >> i will need to buy new bearings for it when i have read on google about the >> fan. You never know until you try. Anyway, the Alphaserver 4100 has four midsize muffin fans and I found them trivial to take apart and trivial to replace the bearings which were a standard off the shelf part. It was easier to fix the fan than it was to replace them since DEC had a custom fan with a speed sensor built in that proved impossible for me to find. It changes from model to model and generation to generation. -- Richard Loken VE6BSV, Systems Programmer - VMS : "...underneath those Athabasca University : tuques we wear, our Athabasca, Alberta Canada : heads are naked!" ** rlloken at telus.net ** : - Arthur Black

7 years, 6 months

DEC DS10L Fix CPUFan!

by danielolsson＠linuxmail.org

Hey Jon! Thank you for the tips, i will see if i can open it up in someway, the fan is kinda like a laptop blower style, but a bigger version of it :) I think i will need to buy new bearings for it when i have read on google about the fan. /Daniel

7 years, 6 months

raytheon 706 computer users manual at SMECC

by COURYHOUSE＠aol.com

Don't be nasty Al! I was willing to scan the addendum and covers if needed. I also did not know if others with interest needed...I am glad the book is scanned already as I do not care to blow mine apart... glue backing gets pretty brittle on these things. The addendum is a loose pamphlet that was just with the manual In a message dated 10/30/2016 11:20:03 A.M. US Mountain Standard Tim, aek at bitsavers.org writes: BFD On 10/30/16 11:03 AM, william degnan wrote: >> I see bitsavers has manual but not pmphlet.Also there is no color front >> and back cover

7 years, 6 months

raytheon 706 computer users manual at SMECC

by COURYHOUSE＠aol.com

I am sorry Bill...I have no idea what to do to authenticate help? details? thanks Ed# In a message dated 10/30/2016 11:03:41 A.M. US Mountain Standard Tim, billdegnan at gmail.com writes: Ed, I have a little 703 and 706 in my library under Raytheon. Clearing out my spam folder I see your recent messages to cctalk. Here is why your emails are going into the spam box, see if you can authenticate your email address. Bill *Why is this message in Spam?* It has a from address in aol.com but has failed aol.com's required tests for authentication. On Sun, Oct 9, 2016 at 11:45 PM, <COURYHOUSE at aol.com> wrote: > We have in the library: > "raytheon 706 computer users manual" > at SMECC. > > Wanted to see if it was online somewhere. > > Nice shape tight binding with an additional errata and addendum > pamphlet accompanying it. > > I see bitsavers has manual but not pmphlet.Also there is no color front > and back cover, which > if you have the computer is cool artwork for a display. - > > Anyone with a 706 out there? > > Ed# _www.smecc.org_ (http://www.smecc.org) > >

7 years, 6 months

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test-drb October 2016