OpenBOR and video modes

Hello,

I as testing out the video mode option with OpenBOR (latest Retrobat) and choosing a video mode on a lcd screen, which works each time I select a specific resolution.
However on a setup with a CRT screen and CRT Emudriver 240p resolutions dont get selected, the only time a resolution will work is was when i select some sort of interlaced resolution like 480i be it 640x480i or 2560x480i (Super Res).

Was wondering if that's a retrobat setting that can be changed or if it depends on OpenBOR supporting those 240p type resolutions?

Sorry if this question is confusing.

Thank you.