[aprssig] TNC Trace mode

[Henk de Groot]

At 07:56 4-9-2004 +1000, Andrew Rich wrote:
>I could not for the life of me line it up
>
>Is that a single roll right ?'

Yes. The sender shifts it left to clear bit 0, which is used as end-marker. 
The receiver has the shift right to undo it. This also shifts bit 0 into 
the carry-flag of the CPU so its easy to jump out of the header-reception loop.

Kind regards,

Henk.