ROP_SRC
sc->sc_gc.gc_rop = ROP_SRC;
mgx_write_1(sc, ATR_ROP, ROP_SRC);
mgx_write_1(sc, ATR_ROP, ROP_SRC);
mgx_bitblt(sc, xs, y, xd, y, width, height, ROP_SRC);
mgx_bitblt(sc, x, ys, x, yd, width, height, ROP_SRC);
p9100_bitblt(sc, x, y, x, y, wi, he, ROP_SRC ^ 0xff);
p9100_bitblt(sc, x, y, x, y, wi, he, ROP_SRC ^ 0xff);
p9100_ctl_write_4(sc, RASTER_OP, ROP_SRC);
p9100_bitblt(scr->scr_cookie, xs, y, xd, y, width, height, ROP_SRC);
p9100_bitblt(scr->scr_cookie, x, ys, x, yd, width, height, ROP_SRC);
sc->sc_gc.gc_rop = ROP_SRC;
p9100_ctl_write_4(sc, RASTER_OP, ROP_SRC);