28 Mar
2021
28 Mar
'21
3:52 p.m.
On Mar 27, 2021, at 3:06 PM, Johnny Billquist <bqt
at softjar.se> wrote:
...
Right. Smart controllers with DDCMP in firmware on the controller itself was definitely
not the first implementation.
But I don't have the full history of DDCMP as such. But it sounds reasonable that the
original DECnet could have been using DDCMP already. But was that the first implementation
of DDCMP? You mentioned V3.0, which would imply that there were even older versions since
before DECnet.
Did ANF-10 use DDCMP?
I know of another non-DECnet protocol that used DDCMP: the Typeset-11 cluster
communication. By the time I got there (1978) it used DMC-11s. It also was the first
implementation I saw of distance vector routing, predating the one in DECnet phase 3.
Typeset-11 only did file transfer; it treated short control files as messages when that
was needed, dropping those into a directory to be used as queue elements for a queue
manager application. For example, those files might contain articles for the newspaper,
or individual advertisements for the classified section. As I recall, Joe Mauro was the
primary designer of the protocol.
paul