[Simh] [HECnet] TOPS-20 V4.1 DECnet

Fri May 2 20:26:08 EDT 2014

Actually the situation is somewhat more complex but is difficult to see
exactly as the OPR on the Pdp10 7.02 does not function, so NCP cannot be
used to define nodes and give status.
The phase-III thinks the following:

[DECnet network: local node SWBW08, 2 reachable nodes]
Name    Number  Line            Cost    Hops    L.Links Delay
SWBW08  (58)    local           0       0       
        (44)    DMR-1-0         1023    31      

The Tops20 4.1 thinks:
Local DECNET node: SWBX05
 Accessible DECNET nodes are:   SWBX04  SWBX05 and:

        Status as of 3-May-2014 02:07:01

        Line ID         State           Adjacent Node

        KDP_0_0         On              SWBX04
        KDP_0_1         On
          Function completed successfully

Node 44 is the Swbx04 with is connected to the phase III
So the phase-III thinks the Tops20 node is up, however the Tops20 node
thinks otherwise.
So somewhat more is functioning than directly meets the eye!

Regards,

Reindert

-----Original Message-----
From: simh-bounces at trailing-edge.com [mailto:simh-bounces at trailing-edge.com]
On Behalf Of Cory Smelosky
Sent: Saturday, May 03, 2014 00:52
Cc: simh at trailing-edge.com
Subject: Re: [Simh] [HECnet] TOPS-20 V4.1 DECnet

On Sat, 3 May 2014, Johnny Billquist wrote:

> Hi.
>
> On 2014-05-02 20:02, simh at swabhawat.com wrote:
>> Hi guys,
>
> Well, if it truly is Phase II, then yeah, I would not expect it to 
> work. But I was pretty sure it was Phase III, in which case it should
work.
>

There's a tape listed as Phase III...is it not Phase III?!

>> Further there is no difference between the functioning of a Rsts-E 
>> 10.1 and a Rsx11MP46 Pdp11 with respect to Dup/Dmc/Ethernet if Rsts-E 
>> will support the Dup/Dmc lines and will route as it is primarily an
Ethernet system.
>
> Well, therein lies the problem. RSTS/E simply did not support a bunch 
> of thing that RSX did support.
> But yes, assuming the OS support a device, it should work equally well 
> under RSTS/E and RSX.

Huh.

>
>> To make these things work the following has to be done:
>> 1.	Upgrade Tops20-4.1 Decnet to real phase-III, it then will link to a
>> Pdp10 Tops10 7.02 based phase-III router.
>> 2.	Repair/upgrade the Tops10 7.02 router code so that it will talk to a
>> phase-IV node.
>
> What is wrong with the Tops-10 DECnet phase III code if it don't 
> interoperate with a phase IV node?
>
>> Both things will require Tops monitor programming; the Tops10 7.02 
>> case will probably be the most simple of the two.
>> On the physical plane nothing is wrong as the packets do flow; only 
>> the DDCMP communication process will not startup; it hangs around in 
>> the startup phase.
>
> That's sad.
> But DDCMP should not be too hard to get working. And RSX support DDCMP 
> both on synchronous and asynchronous serial lines. And both using 
> devices that implement DDCMP, and software implemented DDCMP.
>
> 	Johnny
>
>> 
>> 
>> Best regards
>> 
>> Reindert
>> 
>> -----Original Message-----
>> From: simh-bounces at trailing-edge.com 
>> [mailto:simh-bounces at trailing-edge.com]
>> On Behalf Of Cory Smelosky
>> Sent: Friday, May 02, 2014 19:31
>> To: hecnet at Update.UU.SE
>> Cc: simh at trailing-edge.com
>> Subject: Re: [Simh] [HECnet] TOPS-20 V4.1 DECnet
>> 
>> On Fri, 2 May 2014, Paul_Koning at Dell.com wrote:
>> 
>>> 
>>> On May 2, 2014, at 12:59 PM, Mark Pizzolato - Info Comm
>> <Mark at infocomm.com> wrote:
>>> 
>>>> On Friday, May 02, 2014 at 7:36 AM, Paul Koning wrote:
>>>>> ...If you want a RSTS system to connect to your Phase III machine, 
>>>>> you'll want to use a DMC (or DMR/DMP/DMV, they are all roughly 
>>>>> interchangeable).  In a sufficiently recent SIMH, the DMC 
>>>>> emulation speaks real DDCMP so it should talk with a software 
>>>>> DDCMP
>> implementation, such as one that uses a DUP.
>>>> 
>>>> The DUP has only been tested talking to the KDP and DMC/DMR on RSX.  
>>>> If
>> someone wants to try on RSTS I'd like to know if any issues are found.
>>> 
>>> I'll see what I can do.  Since a DMC/DMR does DDCMP itself, it 
>>> shouldn't
>> matter what OS is talking to it; if you get success with DECnet/RSX, 
>> I would expect it to work with DECnet/E as well.
>>> 
>>>> 
>>>>> Or, since it doesn't know sync from async, it will probably talk 
>>>>> to a software DDCMP implementation that uses a terminal interface.
>>>> 
>>>> I believe that it should also talk to an OS based DDCMP 
>>>> implementation
>> which uses Async ports.   If someone is willing to test this, I'll work
on
>> any kinks which may be found which might inhibit this.
>>> 
>>> I'm trying to make some progress on that (using RSTS V10.1).
>>> 
>> 
>> Let me know.  I'm interested in using RSTS/E to link TOPS-20/KS.
>>
>>> 	paul
>>> 
>> 
>> --
>> Cory Smelosky
>> http://gewt.net Personal stuff
>> http://gimme-sympathy.org Projects
>> 
>> _______________________________________________
>> Simh mailing list
>> Simh at trailing-edge.com
>> http://mailman.trailing-edge.com/mailman/listinfo/simh
>> 
>
>
>

--
Cory Smelosky
http://gewt.net Personal stuff
http://gimme-sympathy.org Projects
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