DP_MIX
OUTREG(DP_MIX, (MIX_SRC << 16) | MIX_DST);
OUTREG(DP_MIX, (MIX_SRC << 16) | MIX_DST);
OUTREG(DP_MIX, (MIX_SRC << 16) | MIX_DST);
OUTREG(DP_MIX, MIX_NOT_DST << 16);
OUTREG(DP_MIX, MIX_SRC << 16);