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[aprssig] 220KISS

Ray Wells vk2tv at exemail.com.au
Thu Jan 25 22:54:45 UTC 2007


Dave Baxter wrote:

>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?
> 
>Cheers...
> 
>Dave G0WBX.
> 
>This mail has been scanned by Palmer Cook Computer Services Limited.  www.palmercook.co.uk
>
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Hi Dave

The binary used to ship with BPQ408. It's along time since I used BPQ 
but I vaguely recall a couple of versions of KISS for the TNC220 (was 
JKISS the other version?). What I do recall is that my TNC220 NEVER gave 
reliable results, regardless of the EPROM installed, and it's been 
gathering dust for near 15 years.

The version of the binary I have is the same as yours.

Ray vk2tv




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