NV_CIO_CRE_44
NVWriteVgaCrtc(dev, 0, NV_CIO_CRE_44, owner);
return NVReadVgaCrtc(dev, 0, NV_CIO_CRE_44) & 0x4;
NVWriteVgaCrtc(dev, 0, NV_CIO_CRE_44, head ? NV_CIO_CRE_44_HEADB :