DREG
CSR_WRITE(lcd_base, DREG, message->row1[i]);
CSR_WRITE(lcd_base, DREG, message->row2[i]);
bus_space_write_1(iot, ioh, DREG, *--sc->sc_omp);
bus_space_write_multi_1(iot, ioh, DREG, p, xfer);
bus_space_read_multi_1(iot, ioh, DREG, p, DINAMOUNT);
*p++ = bus_space_read_1(iot, ioh, DREG);
(void) bus_space_read_1(iot, ioh, DREG);
bus_space_read_1(iot, ioh, DREG),
msg = bus_space_read_1(iot, ioh, DREG);