11 Dec
2019
11 Dec
'19
2:02 a.m.
On Dec 10, 2019, at 6:36 PM, Thomas DeBellis
<tommytimesharing at gmail.com> wrote:
Interesting.
Do you have source for the DAP/NFT/FAL on Tops-10 or know where I might get what you
have?
May I ask you what it does against a VMS system? Unless it is reporting DAP 7, my guess
is that it won't work.
Why would you say that? The DECnet rule is backward compatibility, that's why the
version numbers are exchanged.
Actually, DAP takes this very seriously indeed, which is why it sends very long bitmaps
describing in detail all the protocol features supported.
It may well be that a V7 DAP implementation won't talk to V4 (Phase II). But I'd
be very surprised to see it fail talking to a V5.6 protocol peer -- I'm pretty sure
RSTS uses that version and we would certainly have complained if other Phase IV
implementations had trouble with that.
More in general, across the board the rule always was "One version back
compatible". So Phase IV can talk to Phase III (but not to Phase II -- except for
PyDecnet. :-) )
paul