Hi, as you have been told before, try it first independent of RL, but my advice is that you do not complicate yourself, I definitely recommend that you use Redream or Flycast for Dreamcast, I use the first perfectly with the roms in CHD format, you will avoid yourself the previous decompression, and in any case, use demul for the roms of systems that do require its use such as Naomi or Atomiswave. Greetings