[time-nuts] Z3805 utility, Was: AW: (no subject)
mikes at flatsurface.com
Sun May 23 13:05:24 UTC 2010
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
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