Re: [Simh] DECnet for TOPS-10

[Timothe Litt]

That sounds like we can get DECnet on TOPS-20 on SIMH, if so that would be
really great!

Yes.

Which phase(s) does TOPS-20 DECnet support on the KS?

Phase III. Because it was so large, Phase IV used extended sections (addressing), which the KS doesn't support. I used slight-of-hand to make Phase IV fit into TOPS-10 on the KS10.

But Phase III will connect to a Phase IV node, so TOPS-20 can participate in a modern network.

Adding DMR support was on my list, but I haven't done it yet. I'll see if I
can get the KMC/DUP code in and then do DMR, but it may be a while before I
get time.

That would be super. It looked like your code has some hooks for DMR, but is incomplete. Given that you don't actually do DDCMP, the differences should be small.

--
This communication may not represent my employer's views,
if any, on the matters discussed.

On 13-Apr-13 18:25, Rob Jarratt wrote:

-----Original Message-----
From: Timothe Litt [mailto:l...@ieee.org]
Sent: 13 April 2013 22:40
To: r.jarr...@computer.org
Cc: Rob Jarratt; 'Johnny Eriksson'; simh@trailing-edge.com
Subject: Re: [Simh] DECnet for TOPS-10

On 13-Apr-13 17:00, Rob Jarratt wrote:

I wrote support for the KMC/DUP combo a long time ago, for simh v2.9.

Works just fine, both for ANF and DECnet.  Sources are (still) at
ftp://ftp.stacken.kth.se/pub/pdp10/v29upd if anyone is interested.

I do not have any system up at the moment, due to a combination of HW
problems and lack of time.

--Johnny

If KDP (KMC/DUP) still works, it should be integrated into the PDP10
simulator.  TOPS-10 (ANF-10 and DECnet) supports the device, and TOPS-20
(DECnet) supports it.  Both on the KS10.

That sounds like we can get DECnet on TOPS-20 on SIMH, if so that would be
really great!

It went into the PDP10 emulation for a while but was later
removed when we were informed that it would have represented an

impossible

configuration as the DMC11 would have been in the PDP11 front end.

Whoever provided that information was correct for the DMC, but not for
the DMR.

For the KL, yes, the DECnet serial line adapters were in the PDP11 front
end.  Ethernet was on an internal channel.

If the DMC can be configured as a DMR, it should go into the PDP10
simulator.

Adding DMR support was on my list, but I haven't done it yet. I'll see if I
can get the KMC/DUP code in and then do DMR, but it may be a while before I
get time.




As I said, I wrote a KS10 (Unibus) driver for the DMR on

TOPS10, which is in the distributed OS sources.  The DMC is useless on
the KS10.  As I noted, the DMR uses fixed addresses in TOPS-10, not the
usual Unibus floating addresses.

Either device would allow TOPS-10 networking to work under simh. TOPS-10
can be configured for either or both devices.  TOPS-10 DECnet will work
as either a Phase III or Phase IV end-node on the KS10.  (I did the
Phase IV implementation for the KS.)

Which phase(s) does TOPS-20 DECnet support on the KS?

I was a developer for TOPS-10, and supported TOPS-20 (among other
things), so this is authoritative.

This communication may not represent my employer's views,
if any, on the matters discussed.

smime.p7s
Description: S/MIME Cryptographic Signature

_______________________________________________
Simh mailing list
Simh@trailing-edge.com
http://mailman.trailing-edge.com/mailman/listinfo/simh