SCSIDAT
ADDMSGI(GETPORT(SCSIDAT));
SETPORT(SCSIDAT, MSGO(MSGO_I++));
SETPORT(SCSIDAT, CURRENT_SC->cmnd[CMD_I++]);
aha152x_priv(CURRENT_SC)->status = GETPORT(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);