Eight packed keydefs staged here before stt_do_define distributes them: the first five (Gear, Accelerate, Brake, Left, Right) go to $A0D2 and the last three (Quit, Pause, Turbo) to $A0CD. They are filled either wholesale by stt_copy_keydefs copying a joystick scheme over the first five, or one key at a time by redefine_keys_48k.