SONIC_PREVRX
CSR_WRITE(sc, SONIC_RWR, SONIC_CDRRADDR(sc, SONIC_PREVRX(i)));
&(sc)->sc_rda32[SONIC_PREVRX((x))]; \
SONIC_CDRXSYNC32((sc), SONIC_PREVRX(x), \
&(sc)->sc_rda16[SONIC_PREVRX((x))]; \
SONIC_CDRXSYNC16((sc), SONIC_PREVRX(x), \