31 Oct
2016
31 Oct
'16
12:29 p.m.
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)
31 Oct
31 Oct
12:36 p.m.
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."
12:41 p.m.
On Mon, Oct 31, 2016 at 3:36 PM, Ian S. King <isking at uw.edu> wrote:
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.
Yes. Mine says "11/20" and has some later-rev CPU boards (-YA) that I
think date to 1972.
-ethan
12:49 p.m.
On 10/31/16 3:29 PM, COURYHOUSE at aol.com wrote:
In a message dated 10/31/2016 6:36:17 A.M. US Mountain Standard Time,
jnc at mercury.lcs.mit.edu writes:
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.
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.)
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)
2:15 p.m.
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
Bill
2:30 p.m.
On Tue, Nov 1, 2016 at 10:15 AM, william degnan <billdegnan at gmail.com> wrote:
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.'
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 
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