Try enabling the -flipy option.
After enabling both flipx and flipy the vertical games are now displayed correct.
But unfortunately the horizontal games now upside down.
Those flip options should only be active in vertical mode, not horizontal.
Is there a solution to this problem?
Yeah I remember that, but now thinking about it I see no reason why it shouldn't work. Was it because you didn't have the CCC available to enable cloning? Or didn't it work even with that?
I did have the CCC, but I couldn't get any output to the secondary monitor.
But I will try it again, maybe I made some mistake back then.
Thank you very much for your help