STC_MCR           655 dev/sbus/spif.c 	STC_WRITE(sc, STC_MCR, 0);
STC_MCR           888 dev/sbus/spif.c 	mcr = STC_READ(sc, STC_MCR);
STC_MCR           893 dev/sbus/spif.c 	STC_WRITE(sc, STC_MCR, 0);