Created attachment 226445 [details]
Last month I ported libretro-kronos to FreeBSD, which although on the surface appears to be yet another Sega Saturn emulator, it has some value since it also emulates the elusive Sega Titan Video platform.
I tried Cotton II and Cotton Boomerang, which run slowly, but as far as I can tell, rather accurately. This port is capable of running both the Saturn and ST-V versions of the games.
It is worth noting that anther productive port maintainer also ported Mednafen's Beetle Saturn libretro core, which is the fastest and most accurate Sega Saturn emulator in my experience, although it is Sega Saturn only:
(The only other emulator to cover the ST-V platform is the current core of libretro-mame, which I have also ported to FreeBSD, and is coming shortly. There are tradeoffs in that emulator as well, which predominantly has value in that it supports the full compatibility of current MAME versions to retroarch, but this port is the best ST-V emulator when other factors are considered).
As another basis for comparison, here is my new port of emulators/libretro-mame, which IIRC also emulates ST-V, although not nearly as well: