Hi The DB-25 connector, with the pinouts detailed in the "C" rev and the levels in "C" all existed in the early 60's / late 50's. It took them until "C" to get a spec that was at least close to describing what was already common practice, the A and B revs both had a lot missing in them.
Bob On May 23, 2010, at 9:05 AM, Mike S wrote: > At 08:27 AM 5/23/2010, Bob Camp wrote... >> As mentioned in the wiki, the "standard" dates to 1969. The interface dates >> to (at least) 1962. > > No, it says RS-232-C dates to 1969. The C revision was at least the 3rd > (probably the 4th, as they likely did not start with RS-232-A). It is very > probable that an earlier revision existed in 1962. > > I have no proof, but once read that the earlier revisions did not fully > specify the connector, only that it have 25 pins, and that the Cannon DB-25 > just became the convention and only later was put in the standard. > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
