RTW_FEMR_INTR
RTW_WRITE(regs, RTW_FEMR, RTW_FEMR_INTR);
RTW_WRITE(&sc->sc_regs, RTW_FEMR, RTW_FEMR_INTR);
RTW_READ(&sc->sc_regs, RTW_FEMR) & ~RTW_FEMR_INTR);