RETURN_1
ahd_outb(ahd, RETURN_1, CONT_MSG_LOOP_WRITE);
ahd_outb(ahd, RETURN_1, CONT_MSG_LOOP_WRITE);
ahd_outb(ahd, RETURN_1, CONT_MSG_LOOP_READ);
ahd_outb(ahd, RETURN_1, CONT_MSG_LOOP_TARG);
ahd_outb(ahd, RETURN_1, CONT_MSG_LOOP_TARG);
ahd_outb(ahd, RETURN_1, EXIT_MSG_LOOP);
ahd_outb(ahd, RETURN_1, CONT_MSG_LOOP_TARG);
ahc_outb(ahc, RETURN_1, EXIT_MSG_LOOP);
ahc_outb(ahc, RETURN_1, CONT_MSG_LOOP);
ahc_outb(ahc, RETURN_1, 0);
ahc_outb(ahc, RETURN_1, SEND_SENSE);