CG_FTV
WREG32(CG_FTV, vrv);
WREG32(CG_FTV, pi->vrc);
WREG32(CG_FTV, 0);
WREG32(CG_FTV, pi->vrc);
WREG32(CG_FTV, 0);
WREG32(CG_FTV, vrc);
WREG32(CG_FTV, 0);