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[aprssig] APRStt software?

Rick Ruhl ricker at cssincorp.com
Wed May 20 15:57:26 UTC 2009


Ive been writing link lists since I was in high school.  It's easy to do a
linked list for even 200 stations in a system that only has 256 meg of ram..
and that's what you need to run XP at the lowest.  Goodness. This may take
up 2 or 3 meg of memory when Im done with it.

Most of you guys don't know me, but in the 80's I was part of the team that
wrote the PC-MOS O/S (multiuser DOS). I always write small code.. I used to
have to put things in 8 and 16K.. been there done that, like you guys have!

Rick - W4PC


-----Original Message-----
From: aprssig-bounces at tapr.org [mailto:aprssig-bounces at tapr.org] On Behalf
Of Lynn W. Deffenbaugh (Mr)
Sent: Wednesday, May 20, 2009 10:50 AM
To: TAPR APRS Mailing List
Subject: Re: [aprssig] APRStt software?

Bob Bruninga wrote:
>> If I remember the APRStt spec correctly, 
>> it actually requires a DB of callsign 
>> shortcuts that might be quite a challenge...
>>     
> That was abandoned in this new rendition of APRStt.  In this version,
users always send their full callsign first (with overlay character).  After
that, they can use only their 3 digit suffix (plus overlay character)
>   
Anytime someone can use a full callsign and follow it up with a 3 digit 
suffix, the APRStt server needs to be remembering the original to match 
against for the shortcuts.  That's the part that I was indicating a DB 
(or lookup table or some-such) would be necessary and possibly a 
challenge for resource-constrained platforms, especially if the 
shortcuts are valid for 30 minutes or so.

Lynn (D) - KJ4ERJ - Not dashing the spec, but "real-worlding" some 
expectations


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