DM9000_EPDRH
ret = (ior(db, DM9000_EPDRH) << 8) | ior(db, DM9000_EPDRL);
iow(db, DM9000_EPDRH, value >> 8);
to[1] = ior(db, DM9000_EPDRH);
iow(db, DM9000_EPDRH, data[1]);