ENSTIMER
bus_space_write_1(iot, ioh, SXFRCTL1, STIMO_256ms | ENSTIMER);
ahd_outb(ahd, SXFRCTL1, sxfrctl1|ahd->seltime|ENSTIMER|ACTNEGEN);
|term|ahc->seltime_b|ENSTIMER|ACTNEGEN);
|ENSTIMER|ACTNEGEN);