Hobbyking have 2 versions of motherboard for the 9x transmitter.
One is stated as DSS protocol and the other as AFHDS-2a protocol.
Original (DSS) has the m64 ic and i imagine the latter(AFHDS-2A) would be the m128ic
They say the boards are not interchangeable and I asked why but they said they did not know.
Anyone have any ideas on this as I would like to upgrade to the more power of the m128 processor.
I would have imagined the transmission protocol would be in the transmitter module and not anything to do with the motherboard.
DSS motherboard ....
https://hobbyking.com/en_us/turnigy-...her-board.html
AFHDS-2A ..............
https://hobbyking.com/en_us/turnigy-...-protocol.html