Hi,
Just downlaod HEX dump from TDS-6 and start disassembling.
The algorithm for calculate RPL data from ASK files is there.
The HEX file of TDS-6 box can be free downloaded here:
http://www.zulea.ro/TDS6.BIN
Just use IDA and select processor "Hitachi H8/300H".
Good luck
If I will have enough free time, more interesting info soon in "part 2".
Best regards,
Zulea