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

[Cory Smelosky]

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
>> 
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>> 
>
>
>

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