Yes. RSX-11M and RSX-11M-PLUS have different IDs, and yes, MIM is M+, 
and thus sends 13(8).
   Johnny
On 2022-10-20 03:05, Thomas DeBellis wrote:
  I recently had a number of connectivity issues that
caused me to review 
 my DECnet related batch jobs.  The following is a snippet from the log 
 file of GETNOD, which is the weekly batch job that fetches the latest 
 HECnet node list from MIM::.  I had updated it in part because of 
 trouble-shooting, but the change isn't dramatic--it's rather more of a 
 'buff and polish'.  The items in red are of note:
 
     20:31:21 MONTR   $@NFT
     20:31:21 USER   NFT>*SET DEFAULTS MIM:: /USER:
     20:31:21 USER   NFT>*SET DEFAULTS MIM:: /PASSWORD:
     20:31:21 USER   NFT>*SET DEFAULTS MIM:: /ACCOUNT:
     20:31:21 USER   NFT>*SET DEFAULTS MIM:: /OSTYPE:RSX11  ;<-- NEW
     20:31:21 USER   NFT>*DIR MIM::FIX.T20;0
     20:31:21 USER
     20:31:21 USER   [Fork NFT opening DCN:MIM-FAL for reading, writing]
     20:31:23 USER %Remote OS type /different/ from that specified with
     SET DEFAULT
     20:31:23 USER
     20:31:23 USER     MIM::DU1:[DECNET]
     20:31:23 USER   FIX.T20;161;P775656             18 35840(8)
     18-Oct-2022 09:59:43
 
 There is nothing fatal about the message, but it was surprising. 
 Investigating the parse table for OSTYPE in NFT.MAC shows:
 
     OSTTBL: XWD OSTSIZ,OSTSIZ               ;ARGUMENTS FOR /OSTYPE
              T (IAS,.OSIAS)                  ;Operating system type
     ;       T (OS-8,.OSOS8)
              T (RSTS,.OSRST)
              T (RSX11,.OSRXM)
              T (RT11,.OSRT)
              T (TOPS10,.OSTP10)
              T (TOPS20,.OSTP20)
              T (VMS,.OSVAX)
 
 So the above shows only a single RSX parse item and I had wondered about 
 that, given all the various flavors of RSX. Further investigation into 
 DAPSYM.MAC shows what Tops-20 DAP actually knows about (in octal).
 
          .OSRT==1        ;RT-11
          .OSRST==2       ;RSTS/E
          .OSRXS==3       ;RSX-11S
          .OSRXM==4       ;RSX-11M
          .OSRXD==5       ;RSX-11D
          .OSIAS==6       ;IAS
          .OSVAX==7       ;VAX/VMS
          .OSTP20==10     ;TOPS-20
          .OSTP10==11     ;TOPS-10
          .OSOS8==12      ;OS-8
          .OSRXP==13      ;RSX11-M PLUS
 
 That's more like it, I would assume.  So I guess the fix here is to put 
 a few more entries into the NFT parse table.
 
 Johnny, which one of the above is MIM:: reporting?  I guess 13?
  
-- 
Johnny Billquist                  || "I'm on a bus
                                   ||  on a psychedelic trip
email: bqt(a)softjar.se             ||  Reading murder books
pdp is alive!                     ||  tryin' to stay hip" - B. Idol