SIOP_SCID
id = readb(addr + SIOP_SCID) & SCID_ENCID_MASK;
writeb(addr + SIOP_SCID, id | SCID_RRE);
id = readb(addr + SIOP_SCID) & SCID_ENCID_MASK;
writeb(addr + SIOP_SCID, id | SCID_RRE);
bus_space_read_1(sc->sc_rt, sc->sc_rh, SIOP_SCID);
bus_space_write_1(sc->sc_rt, sc->sc_rh, SIOP_SCID,