[HECnet] DECnet-RT?

[Johnny Billquist]

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

-- 
Johnny Billquist                  || "I'm on a bus
                                   ||  on a psychedelic trip
email: bqt at softjar.se             ||  Reading murder books
pdp is alive!                     ||  tryin' to stay hip" - B. Idol