ROP_PAT
cmd = BLT_PAT_IS_SOLID | BLT_PAT_IS_MONO | ROP_PAT;
bus_space_write_4(sc->sc_bustag, sc->sc_p9100_regh, RASTER_OP, ROP_PAT);
p9100_ctl_write_4(sc, RASTER_OP, ROP_PAT);