SCSISIG
while ((bus_space_read_1(iot, ioh, SCSISIG) & ACKI) != 0)
bus_space_write_1(iot, ioh, SCSISIG, PH_MSGOUT | ATNO);
while ((bus_space_read_1(iot, ioh, SCSISIG) & ACKI) != 0)
bus_space_write_1(iot, ioh, SCSISIG, 0);
sc->sc_phase = bus_space_read_1(iot, ioh, SCSISIG) & PH_MASK;
bus_space_write_1(iot, ioh, SCSISIG, sc->sc_phase);
bus_space_read_1(iot, ioh, SCSISIG));
bus_space_write_1(iot, ioh, SCSISIG, sc->sc_phase | ATNO);
while ((bus_space_read_1(iot, ioh, SCSISIG) & ACKI) != 0)