Thanks for ready to help, flasher86
I don't work with keys, I simply try to catch any RockKeyMsg, with no luck at now
I think rk27 players with touchpad are compatible, because RockTouchMsg consists only from 3 fields - state, X coordinate and Y coordinate.
At this time I partially disassembled my original base.rkw, about 70% from total, most of important functions found. But is where a way to dump full RAM from working player? It will really help in disasm. I can write a simple elf, but maybe special software exists?