FRGD_SRC_FRGD_CLR
aty_st_le32(DP_SRC, FRGD_SRC_FRGD_CLR, par);
BKGD_SRC_BKGD_CLR | FRGD_SRC_FRGD_CLR | MONO_SRC_ONE,
src = MONO_SRC_HOST | FRGD_SRC_FRGD_CLR | BKGD_SRC_BKGD_CLR;