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[aprssig] RE: 220KISS

John Wiseman john.wiseman at ntlworld.com
Thu Jan 25 22:49:24 UTC 2007

Re: [aprssig] TM-D700A MANAULS ECTSDave,

I haven't come across this problem, but I haven't used 220KISS for quite a
while. I think I still have a TNC220 somewhere - I'll try to dig it out.

The version you have is the latest, but if you like I can send you another
copy, just in case the one you have is corrupt.

John G8BPQ

  -----Original Message-----
  From: Dave Baxter [mailto:aprssig-bounces at lists.tapr.org]On Behalf Of Dave
  Sent: 25 January 2007 22:40
  To: TAPR APRS Mailing List
  Subject: 220KISS 

  Hi All...

  Does anyone have any informaton re the KISS only rom image "220KISS" for
the Pac-Com TNC-220 ?

  I have just tried it, and though it receives well, it often transmit's a
blank signal, that is, it keys the radio, but send no audio, that about 50%
of the time.  When it does transmit audio, often it's truncated at the
begining of the packet.  When it works though, the packet and data are good.

  The hardware is fine, the TNC-220 and radio (FT2700RH) are time prooved
and work well.

  However due to a strange issue between UiView and the original TNC
firmware 1.1.5 and 1.1.6 and it's KISS implementation, I was getting
overlong transmit preambles, like at least one second!  But the data payload
was good.  Hence at someone else's recomendation, I went looking for this.
Google for "220KISS" (no quotes) and you'll find it.

  In regular packet mode with the original firmware, the TNC works OK, no
problems at all.

  So, looks like a bug in the 220KISS code?  Anyone know of a copy of the
sources, I have Z80 cross assemblers to hand.

  I believe it was in part crafted by G8BPQ.  Anyone have any contact
details for him?

  It may be a "Bit Old" though..   V.32 26MAR 87   can be seen in the rom
image starting at address 0003.  The size of the image is 2k (2048 bytes)

  Anyone got a newer version?


  Dave G0WBX.

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