Flip orientation of MAX7456 OSD vertically

I'm trying to work out some issues with my screen display, and for various reasons I need to flip my monitor upside down. I could simply invert my camera and the video feed would then be right side up again, but I'm using a Sparkfun breakout version of the MAX7456 OSD board to display data on my screen. If I flip everything else, my display data will still be upside down.

Does anyone know if there is a way to invert the OSD data somehow?

Thanks.