Ok, on certain games I'm getting poor performance when launching from mamewah, but different results when I run mamepp.exe from the command line.
My mamepp.ini has hwstretch 1; resolution 640x480.
If I launch super gem fighter from the command line runs at 55 fps but is _not_ fullscreen.
When I launch it from mamewah it's fullscreen but chugs...
Interestingly, a mamepp -showconfig displays up the settings in the ini file o.k. so I can only assume mame is failing on the hwstretch. I'd hazard a guess that my crappy onboard video doesn't support hwstretching, but before I go out and buy a new one can anyone confirm this is what is happening?