FDO_MOEN
u_int8_t dor = FDO_FRST | FDO_FDMAEN | FDO_MOEN(0);
drive | FDO_FRST | FDO_MOEN(drive));
bus_space_write_1(t, h, FDREG77_DOR, FDO_FDMAEN | FDO_MOEN(0));
status |= FDO_MOEN(n);
bus_space_write_1(iot, ioh, fdout, drive | FDO_FRST | FDO_MOEN(drive));
status |= FDO_MOEN(n);