🚀 go-pugleaf

In article <1992Sep1.192843.7951@tcsi.com> jrk@nittany.tcs.com (John Koper) writes:
>Can anyone give me a brief description of NTDS?  I belive
>it's some kind of protocol used in the military and I think
>it stands for "Navy Tactical Data Standard"?  I tried archie
>but had no luck finding anything.

In the dim, gray past, I designed a couple of NTDS interfaces.
I even still have the spec: MIL-STD-1397(SHIPS)  1973

NTDS was (is?) basically a parallel data channel for military computers.
Although a serial version was defined, I never saw one.

NTDS channels are very similar to the "Word Channels" on older UNIVAC machines.
I don't know if UNIVAC drove NTDS specs or vice versa.

Basically the interface was full duplex with several data lines and a
data ready control.  The receiver would accept the data and toggle a
data accepted control line.

There were also several variants for the electrical interface
(NTDS-slow -15V, NTDS-fast -3V, NTDS-anew +3.5V).

Hope this helps,
Art