Source code for TNC KISS

I've already arduino NANO V3 (ATMEGA 328P) which is on the circutry of TNC modem kiss .
i ve upload a frimware of mobilinkd , it works with RMS express but really so slow!
i am asking if someone can help me and give the source code or the frimware.hex to get rid of this matter !

I ADD THAT MY TRANSCIEVER WORKS ON 30 TO 80 MHZ

Take a look at Micromodem which is open source.

What do you mean by "slow"? Communication at 1200 Baud is not fast.

the mobilinkd firmware doesn't support my transciever (30-80 Mhz )
but when i use it with another like kenwood ( 146-174 MHz ) it works