fddata
bus_space_read_1(iot, ioh, fddata);
bus_space_write_2(iot, ioh, fddata, x);
(void)rd_fdc_reg(fddata);
fdc->sc_status[n++] = rd_fdc_reg(fddata);
wrt_fdc_reg(fddata, x);
fdc->sc_addr + fddata * 2 + 1);
bus_space_read_1(iot, ioh, fddata);
bus_space_write_1(iot, ioh, fddata, x);
bus_space_read_1(iot, ioh, fddata);
bus_space_write_1(iot, ioh, fddata, x);