I can load them just fine from command line (although this does not seem to work with compressed GB/GBC roms), but for the life of me, I can’t find a way to do so from RGUI.
Is it even possible? Documentation doesn’t mention anything at all, googling the problem returns Phoenix tutorials, which are obviously outdated.
Not that I know of. I think you’re stuck with the CLI for slot-games, like SGB and Sufami Turbo.
No, slot games cannot be loaded from RGUI. Having 3-4 extra menus just to deal with these oddball cases would be pretty ugly.
Actually, wouldn’t it be possible to slot this into Core options menu?
Core options is to toggle runtime options, not to deal with loading anything.
Would it not be possible to simply make Gameboy ROMs loadable with the bsnes cores, and make said cores look for the Super Gameboy BIOS/ROM in the System directory so they can load them?