ciao.
Qui trovi alcuni tutorial per il Dreamcast
https://github.com/RetroPie/RetroPie-Setup/wiki/Dreamcast
http://www.dreamcastarena.com/#/dreamcast-console-fansite-community
https://neperos.com/search.php?page=journ&j=Dreamcast
https://www.dreamcastlive.net/connection-guide.html

spero ti siano utili.