BT_READ           488 dev/sbus/cgsix.c 			c = BT_READ(sc, BT_CTRL);
BT_READ           493 dev/sbus/cgsix.c 			c = BT_READ(sc, BT_CTRL);
BT_READ           718 dev/sbus/cgsix.c 	BT_WRITE(sc, BT_CTRL, BT_READ(sc, BT_CTRL) |