6 Sep
2022
6 Sep
'22
8:40 p.m.
On Sep 6, 2022, at 2:32 PM, Johnny Billquist
<bqt(a)softjar.se> wrote:
On 2022-09-06 17:57, Dave McGuire wrote:
TOPS-20 V4 has DECnet Phase II. I've used it for Phase II testing. PyDECnet can
handle that, at least in T1.1. That will do "intercept" service for the TOPS-20
node, making all of HECnet visible. Yes, you actually get better access than a Phase III
node would (since those are limited to in-area only).
The intercept machinery is not 100% yet, because Phase II assumes no packet loss and in
Phase III and up that isn't a valid assumption. Also, intercept has to track the
connections and close them if the other end goes away. I don't have tracking yet, and
when I add that I figure I can make the intercept service also do NSP packet
retransmission on behalf of the Phase II client.
Still, the existing machinery works reasonably well. I've done file access from
TOPS-20 V4 to RSX; that works except that directory listings are somewhat messed up (dates
look weird). Haven't figured out why yet. And while rumor has it that there is a
cross-protocol remote terminal client on the support tapes, I haven't figured out how
to build those. It doesn't help that I'm an utter TOPS novice, TOPS-20
especially.
paul
We have a lot of real systems at LSSM that are
on HECnet when we have them powered up:
VAX-11/750 VMS 4.7
VAX-8300 VMS 7.3
VAX-7000 model 720 VMS 7.3
VAX-6000 model 510 VMS 7.3
VAX-4000/90 VMS 7.3
VAX-4000/700a VMS 7.3
MicroVAX-2000 VMS 7.3
MicroVAX-III VMS 7.3
DEC3000-800 VMS 8.2
PDP-11/53 RSTS/E v10.1
PDP-11/70 RSX-11M-PLUS v4.6
PDP-11/44 RSTS/E v10.1
HP rx2660 VMS v8.4
Systems Concepts SC40 TOPS-20 v7
Symbolics XL1201 Genera 8.3
Our VAX-11/780 will hopefully be up and running sometime this winter, as will the
second PDP-11/70. One of the DECsystem-2020s may come up this winter as well, depending
on volunteer time availability. I just started putting together a MicroVAX-II
dual-booting VMS 4.7 and Ultrix, and will try to get DECnet running under Ultrix on that.
The -2020 will be tricky to get up on HECnet, though. As far as I remember/know, it only
officially had Phase III. And you need to run TOPS-20 V4.