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you could also try MAME32 (it also works for me) if you are fine with it
P.S.
Waaaah, I don't know if it is just me but I haven't seen any stuff on NAOMI 2......yet I've already seen samples of games using Chihiro (Xbox-1 based hardware).
Not to nitpick but AFAIK, Chihiro is more sophisticated and newer than NAOMI2. How hard can it be to crack the latter (when it has been done on the former years ago)???