Try using older MAMECE3 release if it was working nice for you. Try backing up all the data, performing hard reset and installing only MAMECE3. You can also try MAMEBoy www.mameworld.net/mameboy
However, it supports significantly smaller number of games compared to MEGA MAMECE3, although it runs supported games faster.
> I'm a bit confused why some games I've tried in the past won't work now.
> Specifically, wonder boy (world) and Act Fancer. I had both working very nicely
> on my cassiopea EM500(200Mhz Mod). Now when I try to run them mamce goes to the
> black screen then exits back to the main menu. I thought it was a memory issue
> so I tried every combination I could think of, but nothing worked. Does anyone
> have any ideas? Since those games worked at one time I'm betting a lot of the
> games I've been having troubles with probably also work on my cassiopea. TIA.