POS1064_XGENCTRL
hw->DACreg[POS1064_XGENCTRL] &= ~M1064_XGENCTRL_SYNC_ON_GREEN_MASK;
hw->DACreg[POS1064_XGENCTRL] |= (m->sync & FB_SYNC_ON_GREEN)?M1064_XGENCTRL_SYNC_ON_GREEN:M1064_XGENCTRL_NO_SYNC_ON_GREEN;