SCSIDAT
(void) bus_space_read_1(iot, ioh, SCSIDAT);
bus_space_write_1(iot, ioh, SCSIDAT, *--sc->sc_omp);
acb->target_stat = bus_space_read_1(iot, ioh, SCSIDAT);
(void) bus_space_read_1(iot, ioh, SCSIDAT);
SCSIDAT);
(void) bus_space_read_1(iot, ioh, SCSIDAT);
(void) bus_space_read_1(iot, ioh, SCSIDAT);
ahd_inb(ahd, SCSIDAT);
ahd_inb(ahd, SCSIDAT);
ahd_outb(ahd, SCSIDAT, ahd->msgout_buf[ahd->msgout_index++]);
ahd->msgin_buf[ahd->msgin_index] = ahd_inb(ahd, SCSIDAT);