FB_VBLANK_VSYNCING
vblank.flags |= FB_VBLANK_VSYNCING;
vblank->flags |= FB_VBLANK_VSYNCING;
if(reg1 & 0x02) ret |= FB_VBLANK_VSYNCING;
if(reg1 & 0x08) ret |= FB_VBLANK_VSYNCING;