[Simh] Configuring DMC11 Devices

[Christian Gauger-Cosgrove]

On 3 January 2016 at 07:19, Mark Pizzolato <Mark at infocomm.com> wrote:
> Well, HELP suggests the following
>
>         sim> help dmc config example
>         Device DMC is currently disabled
>         DMC help.  Type <CR> to exit, HELP for navigation help
>         Examples
>             To configure two simulators to talk to each other use the following
>             example:
>
>             Machine 1
>                 sim> SET DMC ENABLE
>                 sim> SET DMC0 PEER=LOCALHOST:2222
>                 sim> ATTACH DMC0 1111
>
>             Machine 2
>                 sim> SET DMC ENABLE
>                 sim> SET DMC0 PEER=LOCALHOST:1111
>                 sim> ATTACH DMC0 2222
>
> You should be able to confirm that this is sufficient if you try connecting DMCs together when running 'known to work' OS configurations (these include VMS and RSX).
>
I guess I need to install RSX or VMS then. And that was the first
configuration I tried.


> Meanwhile, since RSTS's drivers (or network startup code) have issued warnings about problems with the version of the device we can't really be sure that it is actually starting up the device.  The DMC device simulator won't try to connect to the peer until the simulated OS brings the device online.
>
Well, I was attempting it with RSTS/E since the "XM0: is missing
ECO's, but will still function." error implies that the DMC11 device
would still function. I turned on debug for the DMC device using "SET
DMC DEBUG" and nothing seems to be getting printed even though the DMC
device is being "used" by RSTS/E.

In any case, after DECnet/E 4.1 starts up the following gets printed:
Event type 4.11, Circuit initialization failure - circuit fault
Occurred 20-Dec-28 13:25:10.0 on node 1.250 (HOUOU)
Circuit DMC-0
Reason = Circuit synchronization lost
Adjacent node address = 0


The above message repeats, continuously, of course with date and time
matching. Trying with a date before 2000, still results in the same
circuit initialization failure (just with the correct date, of
course).


> If someone has RSTS DMC11 device driver source we could determine the details of the version requirements and/or other behavior that it needs.
>
Unfortunately, I can't help with that since the driver sources don't
come with the RSTS/E 10.1-L installation tape.


Cheers,
Christian
-- 
Christian M. Gauger-Cosgrove
STCKON08DS0
Contact information available upon request.