under dos its usually /, capitalization makes no difference iirc, a quick google only gives hints about EGA support, could not find cga

The CGA mode works for me: SF /C

If it doesn't work for you then you may have an EGA-only version.

I also suggest machine=cga if using the game's CGA graphics, because it makes use of red in place of magenta in mode 5.

Thank you I managed to make it work 😀