XMAPALL_CLUT
bus_space_write_1(dc->iot, dc->ioh, XMAPALL_CLUT, r);
bus_space_write_1(dc->iot, dc->ioh, XMAPALL_CLUT, g);
bus_space_write_1(dc->iot, dc->ioh, XMAPALL_CLUT, b);