nvidia_write_clut
nvidia_write_clut(par, regno, red >> 8, green >> 8, blue >> 8);
nvidia_write_clut(par, regno * 8 + i, red >> 8,
nvidia_write_clut(par, regno * 8 + i,
nvidia_write_clut(par, regno * 4 + i, r,
nvidia_write_clut(par, regno, red >> 8, green >> 8, blue >> 8);