RGE_ISR
if ((RGE_READ_4(sc, RGE_ISR) & sc->rge_intrs) == 0)
status = RGE_READ_4(sc, RGE_ISR);
RGE_WRITE_4(sc, RGE_ISR, status);
RGE_WRITE_4(sc, RGE_ISR, RGE_READ_4(sc, RGE_ISR));