On Wed, 3 Apr 2019 09:29:41 -0400, Paul Koning wrote:
  I had in my memory that it used object 63.  Thanks. 
My goal is to reverse 
 engineer this protocol at some point and create a new implementation.  If 
 sources for it turn up (for any OS) that would help a lot.  It can't be very 
 much code. 
These are (some) documentation and sources for TOPS-10:
http://pdp-10.trailing-edge.com/tops10_tools_bb-fp64a-sb/01/10,7/psthru/pst…
http://pdp-10.trailing-edge.com/tops10_tools_bb-fp64a-sb/01/10,7/psthru/pst…
http://pdp-10.trailing-edge.com/tops10_tools_bb-fp64a-sb/01/10,7/psthru/pmr…
  FAL doesn't explicitly do PMR at all; instead it
"just works" provided the 
 intermediate nodes are VMS, because of transparent network access in RMS32. 
Yup! In fact there is some specific bit in the FAL$LOG logical name which
has to be turned on for it to refrain from continuing if it finds that there
is more than one node in the file specification :)
MAIL too has its internal parsing for "::" and thus does not require it.
Anyway, if someone wants the VAX binary version I have, I could send it to
someone for sharing on HECnet, or I could just attach it here on the mailing
list: once compressed it's just 10-15 kB :)
Bye,
G.