CG6_FBC_CLIPMAXY
FBC_WRITE(sc, CG6_FBC_CLIPMAXY, ri->ri_height - 1);
FBC_WRITE(sc, CG6_FBC_CLIPMAXY, ri->ri_height - 1);
FBC_WRITE(sc, CG6_FBC_CLIPMAXY, ri->ri_height - 1);
FBC_WRITE(sc, CG6_FBC_CLIPMAXY, ri->ri_height - 1);
FBC_WRITE(sc, CG6_FBC_CLIPMAXY, ri->ri_height - 1);