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[aprssig] ARPS physical layer

Curt, WE7U curt.we7u at gmail.com
Thu Sep 16 12:10:06 UTC 2010


On Thu, 16 Sep 2010, Wes Johnston, AI4PX wrote:

> You also need to be aware than KPC tncs and TAPR clone tncs treat the
> "has been digipeated" flag differently.  I can't remember which is
> which, but one of them marks only the LAST digipeater field, the other
> marks EACH digipeater.  Your code needs to simply look for the last
> digipeater marked as digipeated.

Not exactly.  What you're referring to is the asterisks marking the
used digipeater fields in the human-readable output from the TNC.
The actual bits in the binary header are treated the same in either
TNC, as per the 2.0 spec.

-- 
Curt, WE7U.                         <http://www.eskimo.com/~archer>
    APRS:  Where it's at!                    <http://www.xastir.org>
   Lotto:  A tax on people who are bad at math. - unknown
Windows:  Microsoft's tax on computer illiterates. - WE7U.
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