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

by COURYHOUSE＠aol.com

In a message dated 10/31/2016 2:31:02 P.M. US Mountain Standard Time, tmfdmike at gmail.com writes: On Tue, Nov 1, 2016 at 10:15 AM, william degnan <billdegnan at gmail.com> wrote: >> >> Find a copy of the PDP-11 systems handbook! Say 1978, 80 and 82 versions >> and >> see the difference. Never mind the Unibus, Qbus, PRO, and PDT flavors. >> >> >> Allison >> >>> thanks Ed Sharpe _www.smecc.org_ (http://www.smecc.org) >>> >>> >>> > > Here is a thread I posted on my site, with link to the first printing of > the PDP 11 brochure. The first PDP 11 models had no "/nn" on the front > panel.. see for yourself. > > http://vintagecomputer.net/browse_thread.cfm?id=593 Mine is a very early example - number 636 IIRC - and it just says 'pdp-11' on the front: http://www.corestore.org/1120-1.jpg Mike http://www.corestore.org 'No greater love hath a man than he lay down his life for his brother. Not for millions, not for glory, not for fame. For one person, in the dark, where no one will ever know or see.' Mike OK that is a great indicator! serial# and date wise! Ed#

9 years, 3 months

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

by COURYHOUSE＠aol.com

In a message dated 10/31/2016 6:36:17 A.M. US Mountain Standard Time, jnc at mercury.lcs.mit.edu writes: > 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 Great History Noel! Many Thanks! ... I wonder if the pdp-11 was just called pdp-11 at t that point or was a pdp-11/20 like we have.. I know they are essentially the same at this time point they got their PDP 11 what did it say on the front panel I wonder? (figuring all this stuff out for titling up the cards in the 11/20 display we are planning.) thanks Ed Sharpe _www.smecc.org_ (http://www.smecc.org)

9 years, 3 months

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

by COURYHOUSE＠aol.com

In a message dated 10/31/2016 1:41:28 P.M. US Mountain Standard Time, jnc at mercury.lcs.mit.edu writes: > From: Ed Sharpe > I wonder if the pdp-11 was just called pdp-11 at t that point or was a > pdp-11/20 like we have Others have better info on this than me... > at this time point they got their PDP 11 what did it say on the front > panel I wonder? I'm going to _guess_ that it was the earlier caption; I definitely recall reading somewhere (maybe that history thing I already provided a link to) that when the PDP-11/20 first arrived, DEC didn't have a disk drive for it, and so it sat in a corner for some months (running some chess problem) until the disk arrived. So that argues that it was a very early production machine. Noel Noel - OK that is what I also read.... so probably would have said PDP-11 on the front panel not 11/20 if it was that early if we subscribe to the theory that the ones labeled 11 only were before the 11/20 I do wonder if there are any photograph of the system they used at the get go of the PDP-11 use? Need a photo that has definite date info.... yes, the systems are the same but some of this is important as I do the display cards for the 11/20 we have here at SMECC Thx Ed# _www.smecc.org_ (http://www.smecc.org)

9 years, 3 months

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

by COURYHOUSE＠aol.com

In a message dated 10/31/2016 1:58:29 P.M. US Mountain Standard Time, ajp166 at verizon.net writes: > ... > I wonder if the pdp-11 was just called pdp-11 at t that point or > was a pdp-11/20 like we have.. At that time PDP-11 was a general architecture name and 11/mumble was a specific system. Keep in mind that new versions of the -11 would evolve soon after introduction and continue over time for decades. Add to that there were both processor naming and system configuration naming conventions. > I know they are essentially the same at this time point they got > their PDP 11 what did it say on the front panel I wonder? > (figuring all this stuff out for titling up the cards in the 11/20 > display we are planning.) Find a copy of the PDP-11 systems handbook! Say 1978, 80 and 82 versions and see the difference. Never mind the Unibus, Qbus, PRO, and PDT flavors. Allison > OK I have seen both on Panels pdp-11 and pdp 11/20 figured the first issuance would say pdp-11 only on panel Ed#

9 years, 3 months

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

by jnc＠mercury.lcs.mit.edu

> From: Ed Sharpe > I wonder if the pdp-11 was just called pdp-11 at t that point or was a > pdp-11/20 like we have Others have better info on this than me... > at this time point they got their PDP 11 what did it say on the front > panel I wonder? I'm going to _guess_ that it was the earlier caption; I definitely recall reading somewhere (maybe that history thing I already provided a link to) that when the PDP-11/20 first arrived, DEC didn't have a disk drive for it, and so it sat in a corner for some months (running some chess problem) until the disk arrived. So that argues that it was a very early production machine. Noel

9 years, 3 months

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

by COURYHOUSE＠aol.com

In a message dated 10/31/2016 12:36:35 P.M. US Mountain Standard Tim, isking at uw.edu writes: On Mon, Oct 31, 2016 at 12:29 PM, <COURYHOUSE at aol.com> wrote: > > ... > I wonder if the pdp-11 was just called pdp-11 at t that point or > was a pdp-11/20 like we have.. > I know they are essentially the same at this time point they got > their PDP 11 what did it say on the front panel I wonder? > (figuring all this stuff out for titling up the cards in the 11/20 > display we are planning.) > I think we had this discussion a while back, but I know that my 11/20 just says 'PDP-11' on the front panel. I've also seen them with '11/20', which is almost certainly a later naming as the -11 line grew. -- Ian S. King, MSIS, MSCS, Ph.D. Candidate The Information School <http://ischool.uw.edu> Dissertation: "Why the Conversation Mattered: Constructing a Sociotechnical Narrative Through a Design Lens Archivist, Voices From the Rwanda Tribunal <http://tribunalvoices.org> Value Sensitive Design Research Lab <http://vsdesign.org> University of Washington There is an old Vulcan saying: "Only Nixon could go to China." ok just re-clarifing.... so then w would be safe in reading the unix history - the 11 they had since when they got it a disk was not avail. (??? REALLY!!?? Hard to believe DEC would ship a processor without disc i/o??? COMMENTS? ) would have just probably said PDP-11 Ed# _www.smecc.org_ (http://www.smecc.org/)

9 years, 3 months

Altair, IMSAI, SWTPC, etc. for sale in Philly

by tosteve＠yahoo.com

--------------------------------------------------------------------------------------------------------*************? Contact Rick below if interested.? *************-------------------------------------------------------------------------------------------------------- Name: Rick Bunker????Contact: rick at bunker.us ????Location: Jenkintown, PA??? I have a computer collection that I have to sell. My wife and I have separated, and the house is being sold, and I have no place to keep the computers in my new apartment. It is a pretty nice collection. Altair 8800, two IMSAI 8080's, an Apple ][ (not ][+ or e or anything, the first one), a TRS-80 (the real first revision, with no numeric keypad, with the original cassette drive, monitor) an LSI monitor, a KIM-1, an original IBM PC (not an XT -- original 2-floppys, original bios), an SwTPC 6800 box, with no innards. Similarly, a Cromemco box with no innards. A Northstar Horizon. Some 8-inch drives, a bunch of S-100 boards, a luggable Kaypro portable, an odd and an end or two. Lots of documentation. Some old disks which may have readable software on them. I don't power these things up, since they have power supplies that you can weld with, with 40-year-old capacitors on them. Is there anybody in striking distance of Philadelphia suburbs, who would consider buying and picking up this collection? --------------------------------------------------------------------------------------------------------

9 years, 3 months

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

by billdegnan＠gmail.com

*For sale 128K Core RAM Industrial PDP 11/40 Massbus System* *Ebay:* 272432268291 http://www.ebay.com/itm/-/272432268291? $1. Bill

9 years, 3 months

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 :-) >

9 years, 3 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

9 years, 3 months

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