DREG
(void) bus_space_read_1(iot, ioh, DREG);
bus_space_write_1(iot, ioh, DREG, *--sc->sc_omp);
bus_space_write_multi_1(iot, ioh, DREG, p, xfer);
bus_space_write_1(iot, ioh, DREG, *p++);
bus_space_write_1(iot, ioh, DREG, *p++);
bus_space_write_1(iot, ioh, DREG, *p++);
bus_space_write_1(iot, ioh, DREG, *p++);
bus_space_write_1(iot, ioh, DREG, *p++);
bus_space_write_1(iot, ioh, DREG, *p++);
bus_space_write_1(iot, ioh, DREG, *p++);
bus_space_write_1(iot, ioh, DREG, *p++);
bus_space_read_multi_1(iot, ioh, DREG, p, xfer);
*p++ = bus_space_read_1(iot, ioh, DREG);
*p++ = bus_space_read_1(iot, ioh, DREG);
*p++ = bus_space_read_1(iot, ioh, DREG);
*p++ = bus_space_read_1(iot, ioh, DREG);
*p++ = bus_space_read_1(iot, ioh, DREG);
*p++ = bus_space_read_1(iot, ioh, DREG);
*p++ = bus_space_read_1(iot, ioh, DREG);
*p++ = bus_space_read_1(iot, ioh, DREG);
bus_space_read_1(iot, ioh, DREG),
(void) bus_space_read_1(iot, ioh, DREG);
*sc->sc_imp++ = bus_space_read_1(iot, ioh, DREG);
(void) bus_space_read_1(iot, ioh, DREG);