HECnet

hecnet@lists.dfupdate.se

15586 discussions

by paulkoning＠comcast.net

In the Phase IV network management spec the description of the encoding of the event log message has this field: JULIAN HALF DAY (2) : B Number of half days since 1 Jan 1977 and before 9 Nov 2021 (0-32767). For example, the morning of Jan 1, 1977 is 0. It's a 16 bit field containing a 15 bit value; there is no explanation why the upper bit is not used even though it's marked as an unsigned integer. As shown, the field overflows in late 2021. If one ignores the arbitrary limit of 15 bits, the end date is 18 September 2066, which is more civilized. I wonder if implementations ignore the 15 bit limit. I think RSTS/E ignores it. paul

6 years, 3 months

RQDX2?

by bqt＠softjar.se

I'm searching for an RQDX2 controller. I know this is maybe a bit off from normal HECnet discussions, but I'm hoping that maybe some people might happen to have some real hardware. I have a few RD53 drives I'd like to read out the contents of, and it seems they were controlled by an RQDX1 or RQDX2. I have an RQDX3 controller, however, the on disk format differs between the RQDX1/2 and the RQDX3, so I don't have any ability to read the drives right now. Since I am in Switzerland (near Zurich) someone local would be much easier, but if someone somewhere else have a card, is willing to ship it, and don't expect a bunch of money in return, I'm interested in that too. If nothing pops up, and can solve this myself at Christmas, when I go back to Sweden, where I have access to more hardware. But being an impatient guy, I'm trying this option as well... :-) Also, an RQDX1 should also work, but if possible, I prefer the RQDX2, since the RQDX1 have some additional issues... And of course, if I manage to get the data out from the drives, there might be some useful things on there that I can share in the end (I'm specifically searching for a few files needed to complete a Modula-2 compiler that exists for RSX). 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

6 years, 3 months

HECnet routing costs

by bqt＠softjar.se

People, I have written a page about DECnet costs and HECnet costs, which I would recommend that anyone interested read through. It contains a bit of elaboration on how DECnet does routing, and gives some suggestions on how costs could be set on HECnet to make it perform better. I have noticed over the years that sometimes we do get really silly routing decisions just because of how people set, or do not set costs. The page I've written is by no means perfect, nor are the suggestions in there. But feel free to come with feedback, or ignore it. But I am going to try and use this myself more properly from now on, and that means that if others don't, you probably are going to get more traffic through your nodes. Traffic that probably do not make sense that it passes through you, but I just feel that I prefer to try and make it work right from my point of view, and then just at least tell people how I worked my numbers out. If someone have a different idea, I'm open to changing my settings, but I will not try and do optimizations to achieve: a) Same paths for packets in both directions - DECnet explicitly does not do this. b) Specifically penalize one type of interface because of any subjective preference about that type of interface in general. Oh - and the link to my writeup: http://mim.update.uu.se/costs.htm 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

6 years, 4 months

DECnet/E install

by paulkoning＠comcast.net

I've worked on RSTS and DECnet/E for a long time but I only very rarely do a formal install, so I don't have the knowledge handy. I just did a V10.1 install, and now would like to do the matching DECnet install, but I can't figure out how to do that and I can't find a DECnet/E installation manual. Can anyone give a quick outline of how to do this? paul

6 years, 4 months

DECnet Implementation and Productization of RSX-11M, 11S, 11D and IAS (was Re: Anonymous FAL (Tops-20))

by wilson＠dbit.com

From: John Forecast <john at forecast.name> [E11 on MIM] >Does the simulator actually simulate the caches or just the control registers >like SIMH? Just the control registers. I hate doing an emulation of a speed-up feature which actually slows it down (which is the case with the FASTBUS: emulation for dual PDP-11/45s but there was no way around that -- making the memory inherently mP-safe meant dinking with locks on every access, so it's *much* slower to touch it than non-"FAST" core). It might be interesting to do as a SET CPU option though, for testing how code would behave in nasty cases on a real 11/74. The fetch/decode/dispatch loop and the most common instructions are recompiled (from scripts) on every SET CPU command, so options like this can be added without penalty, as long as they're disabled by default. It'd be pretty painful though, since in this case *anything* that touches memory would have to be compiled at runtime, so it'd be a lot more code than it is now (less common instructions are static and check the SET CPU flags themselves on the fly rather than having their behavior hard-coded into the compiled code). John Wilson D Bit

6 years, 4 months

Anonymous FAL (Tops-20)

by tommytimesharing＠gmail.com

I have some software that I'd like to post, but don't recall how to configure FAL to allow for an anonymous connection; to download from a restricted directory. I know how to do it for the FTP server (seeing as I wrote it), but ... different code base. I can only vaguely remember what we did for CCnet at Columbia University in the 1980's, but I think it was kind of a hack.

6 years, 4 months

Windows 10 DECnet?

by bygg＠cafax.se

Johnny Billquist <bqt at softjar.se> wrote: > My experience with latd in Linux is that it sucks. It sortof works if > you are lucky, but there are problems in it, which makes it undesirable > to use with RSX at least. My experience is that for connecting to a Tops-[12]0 system it works, even if the thing, as you say, sucks in several ways. Considering myself lucky then. --Johnny (the other one)

6 years, 4 months

Windows 10 DECnet?

by tommytimesharing＠gmail.com

Does anybody know what the status of any types of drivers for DECnet or LAT on Windows 7 or above? I have the CD's from HP for Windows 2000, but I'll be darned if I can lay hands on them.? So I have a Windows 2000 laptop that has LAT on it and I can use that to run Kermit, which has been useful when I have really destroyed things. However, I just got a new Windows 10 machine and I'd like to put DECnet on it.? So is that bring your wallet?? Anybody know anything about PuTTY??? That would be straightforward to adapt to NRT and (maybe) LAT.? One assumes CTERM would be more effort. I have the latd package on one of my Linux hosts and that works great.? Right into the 20.? I have to scrounge up another Ethernet adapter before I reconfigure the whole thing for DECnet because of some connectivity issues.

6 years, 4 months

DECnet Implementation and Productization of RSX-11M, 11S, 11D and IAS (was Re: Anonymous FAL (Tops-20))

by bygg＠cafax.se

Johnny Billquist <bqt at softjar.se> wrote: > > 2. MCB; what was developed on it past your snapshot (Phase II). > > I can't even remember, or realize what MCB stands for now. :-) Multi-Communication-Base comes to mind. --Johnny (the other one)

6 years, 4 months

Routing issue?

by Keith.Halewood＠pitbulluk.org

Hi, I don't appear to be receiving any routing information from 31.3 (PYRTR) Keith

6 years, 5 months

Jump to page:

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

HECnet