[HECnet] This is probably been asked already but....

[Steve Davidson]

I have both physical platforms (PDP-11's, VAXen, Alpha's) and SimH
platforms.   I mix and max as necessary.

-Steve 

-----Original Message-----
From: owner-hecnet at Update.UU.SE 
[mailto:owner-hecnet at Update.UU.SE] On Behalf Of Gregg Levine
Sent: Sunday, July 01, 2012 21:42
To: hecnet at update.uu.se
Subject: Re: [HECnet] This is probably been asked already but....

On Sun, Jul 1, 2012 at 9:33 PM, Johnny Billquist 
<bqt at softjar.se> wrote:
On 2012-07-02 03:17, Gregg Levine wrote:

On Sun, Jul 1, 2012 at 9:10 PM, Bob Armstrong <bob at jfcl.com> wrote:

Dave McGuire wrote
  PDP-8: there's a DECnet implementation for OS/8.


  Do you actually have such a thing?   There was a partial 
implementation for
RTS/8 that was, AFAIK, never released.   I have some 
sources for it, 
but it's unfinished.

Bob


Hello!
About all I found was those sources, on the iBib site. And for the 
other OS, no hits so far on Google.

Steve interesting story, and yes I'm not asking about those three 
letter agencies.

Let me put it to all of you this way. In the book 
"Cuckoo's Egg" as 
related by Cliff Stoll, his(?) VAXes were networked, via 
Ethernet all 
over the campus, (either running BSD or VMS), but they 
were connected 
to the Internet via leased lines.

And in a Doctor Who book, who's reasonably accurate on the 
DEC based 
side of things, and lousy on the desktop side, there are 
PDP-11s and 
possibly a few early Vaxes. and even an Eclipse.

What I am curious about is how the PDP-11s talked to DEC Net based 
systems.

And which ones of the R* operating systems could be confused into 
doing that, and in what ways.


Well, considering the fact that DECnet was born on the PDP-11, the 
question should perhaps be rephrased as how non-PDP11 
systems managed 
to talk on DECnet. :-)

If the question is more on a practical note of how connections were 
done, I think the original was over serial lines, but I might be 
wrong. Multidrop as well as some high speed links were available in 
Phase III, but ethernet only became an option with DECnet phase IV.

Not sure about the time frame for packet switched interfaces. They 
certainly existed in Phase IV, but I don't know if they 
were available 
already in phase III.

The RTS-8 DECNET/8, which was mentioned earlier, talks 
DECNET over a 
serial line, using DDCMP.


              Johnny

--
Johnny Billquist                                   || "I'm on a bus
                                                                  ||   on a psychedelic trip
email: bqt at softjar.se                         ||   Reading murder books
pdp is alive!                                         ||   tryin' to stay hip" - B. Idol



Hello!
Okay.
Now the question that's worth a full Fizzbin. How many of us 
here are running under emulation? This means either a SIMH 
PDP11 or a E11. Or an appropriate Alpha that's done the same way.

-----
Gregg C Levine gregg.drwho8 at gmail.com
"This signature fought the Time Wars, time and again."