I have the exact same problem with the new version.

> Hi, I just installed the latest version of MAMECE. It starts perfectly with
> roaded game ROMS but I CANNOT ADD coins nor find right buttons on my Cassiopeia
> EM500 (english version). I read all the documents included in the file. It only
> explains KEY MAP for E115 but not EM500. Could anyone explaine to me how keys
> are mapped in EM500? Many Thanks
>