sc_macaddr
CSR_WRITE_4(sc, LAN0, ((u_int16_t *)sc->sc_macaddr)[0]);
CSR_WRITE_4(sc, LAN1, ((u_int16_t *)sc->sc_macaddr)[1]);
CSR_WRITE_4(sc, LAN2, ((u_int16_t *)sc->sc_macaddr)[2]);
ether_ifattach(ifp, sc->sc_macaddr, NULL);
((u_int16_t *)sc->sc_macaddr)[i] = epic_read_eeprom(sc,i);