[HECnet] DECnet-RT?

[Chuck Guldenschuh]

I THINK that DECnet RT had DMC-11 support in it. The Phase III support 
was going in after I left the RT group.  It was certainly the right time 
frame for it.

Chuck

On 3/27/2020 20:46, Johnny Billquist wrote:
> On 2020-03-28 01:29, Paul Koning wrote:
>>
>>
>>> On Mar 27, 2020, at 7:50 PM, Johnny Billquist <bqt at softjar.se> wrote:
>>>
>>> On 2020-03-27 16:47, Robert Armstrong wrote:
>>>>> Paul Koning <paulkoning at comcast.net> wrote:
>>>>> As a Phase III node it would be DDCMP only ...
>>>>> I don't remember if it supports any synchronous interfaces ...
>>>>    There are no device drivers included with RT11 for anything that I
>>>> recognize as a synchronous interface, so I would assume it only 
>>>> supported a
>>>> standard asynchronous serial port.
>>>
>>> That don't necessarily mean much. With RSX, DECnet has its own 
>>> device drivers.
>>
>> I should have remembered that.  No idea if that applies to RT-11.  
>> RSTS is different: it uses the standard device drivers, but with some 
>> additional I/O request function codes.  DMC use direct by 
>> applications was always supported.  I'm not sure if application use 
>> of Ethernet was supported, or whether it works (and if not, how hard 
>> that would be to fix).
>
> One "annoying" thing with DECnet under RSX is that this means you must 
> have a separate controller for serial ports if you want to talk DECnet 
> on any, and use others as normal terminal ports, since they cannot 
> co-exist on the same controller. Either the DECnet device driver 
> manages the controller, or the TTDRV device driver manages it. All 
> ports goes to one usecase or the other. Mixing is not possible...
>
>   Johnny
>