Sure mame4all based on .037b5 will be smoother the .138 we have now, but I just found that SDLmame based on .135 is as smooth as mame4all !! I don't know why, even on my n900, the SDLmame was not smooth like this before, but it is now! mame and SDLmame can be installed together through install/uninstall twice, I have succeed a longtime ago, and I didn't notice there is any different between the speed of tihs two app. BUT now, after I flashed emmc and install the two, I found SDLmame is much smoother than mame, and more strange: when I start SDLmame with XT, it's as slow as mame, when I start it directly, it's smoother. and when I start with XT, it can use cheat, while directly not. How does it happen?? anyone give me an explain?