[GreenKeys] Special sequences

[Robert McConnell]

At 4/23/02 12:39 PM -0500, jhaynes@alumni.uark.edu wrote:

>ZCZC as a start of message sequence began in some military systems, I
>believe.  Note that ZCZC is like RYRY in that it alternates opposite
>bit patterns.
>
>NNNN as end of message comes from these military systems also.  In some
>cases the requirement is actually LF-NNNN.

Actually, I remember it as a CR, ten LF's and four N's. Just enough blank 
lines to get a clean tear on the glass plate after the last line of text. 
It was hardcoded into my fingers after the first six months.

Bob McConnell (ex-RM2 USN, NFIT, NLM)
N2SPP