VID_RT
WREG32_P(VID_RT, SSTU(u), ~SSTU_MASK);
WREG32_P(VID_RT, VID_CRTU(u), ~VID_CRTU_MASK);
WREG32_P(VID_RT, VID_CRT(rt), ~VID_CRT_MASK);
WREG32_P(VID_RT, BRT(rt), ~BRT_MASK);