On Nov 21, 2022, at 7:44 PM, Paul Koning
<paulkoning(a)comcast.net> wrote:
 
 
 
  On Nov 21, 2022, at 5:47 PM, John Forecast
<john(a)forecast.name> wrote:
 
  
 On Nov 21, 2022, at 1:17 PM, Thomas DeBellis <tommytimesharing(a)gmail.com> wrote:
 
 Interesting; I was wondering why you picked a special number?  I would imagine that most
implementation wouldn't know it and maybe Ultrix-32 (OS$U32==^D18) might have been a
better choice?  Ultrix-32 is of interest as its NRT is compatible with Tops-10/Tops-20 and
has the same OS type number. 
 
 I wanted to quickly find out how much, if  any, code was dependent on the OS type. One
other area of incompatibility is that TOPS-10 and the Linux dndir require a DAP-level ACK
after the attributes during directory listings. 
 
 I think that's a DAP protocol version issue; it shouldn't be tied to OS type. 
There are some incompatibilities like that between DAP 5.6 and DAP 7.0.  The VMS
microfiche that were posted a while ago give some clues; just enough that I could beat my
Python implementation of NFT into behaving.  You could use that for reference.
  
I don’t remember seeing anything about a VMS microfiche, do you have a pointer?
  John.
  	paul
 
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