25 Dec
2019
25 Dec
'19
4:11 a.m.
Paul, sorry for mis-spelling your name.
You looked at the DECNET-8 code before. I sent you either links, files,
or some reference to a machine where you could check it. I can't
remember now. But anyway, you looked, and figured it was beyond phase I.
Johnny
On 2019-12-25 02:56, Paul Koning wrote:
--
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
On Dec 24, 2019, at 11:59 AM, John Forecast
<john at forecast.name
<mailto:john at forecast.name>> wrote:
A while ago I found a Phase I RTS-8 document that describes the protocol
in reasonable detail. ?It's clear that Phase I has only a vague
resemblance to the later protocols. ?For example, the NSP protocol is
there, but it's seriously different. ?For example, it offers both a
connection service and a datagram service. ?And various other things
work entirely differently than the later versions. ?So while Phase III
and IV can talk to Phase II NSP with no real trouble, there is no way
for any of them to make sense out of what a Phase I node is saying.
If you have source code, it should be pretty obvious if it's Phase I or
Phase II from looking at the NSP packet formats.
paul
On Dec 23, 2019, at 5:51 PM, Johnny Billquist
<bqt at softjar.se
<mailto:bqt at softjar.se>> wrote:
On 2019-12-23 20:24, John Forecast wrote:
Yes, I agree. I just took a look at the code and the early dates match
when Phase I was available (I was using it around the middle of 1976)
and the later dates (mid-1977) would have been when we were finalizing
the DECnet-RSX Phase II system architecture. The code claims to
support NSP version 2.2 but I have no way to map that to a particular
phase, only that version 1.0 was dated July 1975 and version 3.1
(Phase III) was dated March 1978. > ...
That was implemented on RTS-8 and looks like a Phase I
implementation - all hand-crafted PAL code. The floppies are
available on the net and includes full source code. When I joined
the DECnet development group in early 1977, there were a couple of
PDP-8 developers as part of the group. I don?t know if they were
developing a Phase II implementation but they disappeared after
about 6 months - not surprising given the difficulties we were
having getting it to fit in a 28KW PDP-11.
Poul took a look at the DECNET-8 sources, and figured it was actually
not phase I (I thought it was phase I as well). Poul thinks it's
close to, if not actually phase II. There are things in there that
apparently did not exist in phase I.