Finaly got all above mentionned emulator fixed on 1 afternoon. Instead of "auto" in emulator, I've selected Flycast for atomisewave/Naomi/Dreamcast, some games are more than playable, Yabasanshiro for Saturn and don't remember which one for N64, but no more "auto" for sure.
Now I really hope GPIO binaries will be added to net Batocera update for the Tinkerboard, and maybe also the Kintaro script ? Or at least a line to activate in the botocera.conf to make it run ? Can be adde to rpi3 as well.
And fixing non working internal bluetooth.