ISTC_READ         907 dev/sbus/spif.c 		ar = ISTC_READ(sc, STC_RRAR) & CD180_GSVR_IMASK;
ISTC_READ         915 dev/sbus/spif.c 		ar = ISTC_READ(sc, STC_TRAR) & CD180_GSVR_IMASK;
ISTC_READ         921 dev/sbus/spif.c 		ar = ISTC_READ(sc, STC_MRAR) & CD180_GSVR_IMASK;