[HECnet] A2RTR downtime

[Peter Lothberg]

KA10 runs 6.03A, KI support was a mess (did not work as distributed on KI) and yanked in 7.03. We had KI522/KI606 in SMP with 7.02 (that was not supported..) 

-P 

> From: "tommytimesharing" <tommytimesharing at gmail.com>
> To: "hecnet" <hecnet at Update.UU.SE>
> Sent: Tuesday, October 19, 2021 4:28:41 PM
> Subject: Re: [HECnet] A2RTR downtime

> I'm only familiar with the source code for KLH10 to any great extent and a small
> subset of the code for SIMH (the 340). KLH10 implements KL10 and KS10 Tops-20
> and ITS paging microcode. I thought I remembered some stubs for the KI, but I
> wouldn't swear to it.

> I believe the KA10 was de-supported as of the 6.00 series monitor. WPI had 6.05
> running on our KA10, but it was "much modified" as we had some real hackers on
> staff (I wasn't one of them as I worked in Marlboro)

> The KI had to have been de-supported by 7.04 because the October 1988 version of
> the Tops-10 Monitor Calls Reference Manual has a section on user mode extended
> addressing (2.2).

> The SMP code at one point did run on a KI as this is what it was debugged on.
> I'm pretty sure I remember seeing two KI's in the same machine room as 2102,
> 2116, 2136 and 2137, but I could be wrong. I don't remember their processor
> numbers. Marlboro employees would go starry eyed talking about SMP...

> It is tempting to speculate that it might not be an extremely heavy lift to do
> KI paging as it is a subset of TENEX paging (which the KL implements a subset
> of). What I mean is that you would chuck more code than you'd write. I could,
> of course, be completely delusional. I would think that probably SIMH would be
> your best bet in that arena.

> The only patch I'm aware of for NOV 2021 T10 DECnet is what I came up with. I've
> reached out to some people off list to socialize this.

>> On 10/18/21 7:13 PM, Peter Lothberg wrote:

>> 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..)
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