[HECnet] A2RTR downtime

[Peter Lothberg]

This is kind of a bit off topic.. But... 

So I have a lot of T10 7.02 based code for KI10 (using tops10 KI paging...). None of the PDP10 emulators do T10 KI paging.. 

7.03 has lots of internal changes that did not work on KI, so back ported DECnet 4 etc from 7.03 to 7.02 (remember we had KI CPU's..) 

Was there 7.02 that used KL10/Tops20 paging? I don't have the dist tapes any longer? 

Or is there a PDP10 emulator that do KI Tops10 paging that would run my 7.02? 

--P 

So what's the actual T20 patch for NOV 2021 DECnet? 

Ps, tops10 does not "cross compile" between versions well (or at all..) 

> From: "tommytimesharing" <tommytimesharing at gmail.com>
> To: "hecnet" <hecnet at Update.UU.SE>
> Sent: Monday, October 18, 2021 3:00:00 PM
> Subject: Re: [HECnet] A2RTR downtime

> I wouldn't worry about it; I don't use VENTI all that much, either. … Except
> when I do… Then I have to tell you that it has proven to be positively
> invaluable and I am very grateful for that!

> If this were critical, then I'd think about getting off my butt and putting up
> Tops-10 somewhere on one of my home systems. But that would blow a lot of time;
> I haven't done a MONGEN since…well, I honestly can't remember—it's well over
> four decades and I never knew that part of it well to begin with. Come to think
> of it, I might have been doing a ONCE and not a MONGEN .

> Actually, having a guest account on other HECnet systems has also proved
> invaluable for chasing down arcane Tops-20 issues. Thanks all!!

> I reached out to Lars Brinkhoff concerning my Tops-10 patch and he said he would
> distribute wherever it made "sense" to do so. If I get any feedback, I will
> forward it. Otherwise, let me know if there is any way I can provide
> assistance.

> Yes, it is a shame about the STOPCODE , but it would appear that the maintainer
> had some different ideas in the mid-1980's when this code was put in about what
> the usage of Tops-10 would be. This comment is illustrative, the first sentence
> being key:

>> I doubt very much that the date itself has really gone past 2021 . Probably
>> someone smashed an AC or the routine to get the time from the monitor is
>> returning junk. However, on November 9, 2021, it appears that many people will
>> see this problem so prepare your SPR for that date.

> I think the problem is that Tops-10 didn't have the kind of die-hard fanatics
> supporting it (read, MRC) that Tops-10 did, so stuff like this was caught and
> fixed years ago. D36COM has an edit date of 2001 for this, but since it is from
> Gorin, it's probably older.

> I continue to find Y2K things to clean up, these days mostly in the listings
> from various compilers and the remaining CUSP's that MRC didn't catch.

> Another thing I fix are internal time of day comparisons. This is stored as an
> unsigned 36 bit fixed fraction having resolution to about ⅓ of a second, 35
> bits bringing you to 27-Sep-2217 20:00:00 EST US, the full 36 taking you to
> 7-Aug-2576 19:59:59 EST US. Since the PDP-10 only has signed comparisons, all
> single comparison arithmetic will break in a mere 195 years. Fixing that double
> word signed compares has given me some more breathing room. In 554 years, I'm
> sure I'll have thought of something else…

>> On 10/18/21 11:19 AM, Robert Armstrong wrote:

>>> Second is VENTI; I had wanted to test something on it and it doesn't appear to
>>> be online.
>> Sorry, I’m somewhat lazy about booting it up when the host system is rebooted. I
>> don’t use VENTI that much.

>>> Had you had any interest in trying it?
>> It sounds like I’m going to have to. It’s a shame this STOPCODE was a halt and
>> not just a debug one; at least the latter would have allowed the system to
>> continue running.

>> This also means I have to re-discover how to do a MONGEN and build. There was a
>> time, 30 years ago (actually, 40 years ago) when I could have done it from
>> memory but now I’ll have to read the manual again
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