Have just downloaded 1.2.8 and this one works fine for me as well... Seems like the SDL.DLL that came with DosBox is the only one that stresses my CPU in windowed mode. Strange... Klaus

did you allready try replacing the sdl.dll with a newer version ? YEAH - THAT'S IT!! I've downloaded version 1.2.5.0 of SDL.DLL (220 kB) and CPU usage in windowed mode is ok now! The one that came in the DosBox 0.63 package did not have a version number assigned to it in file properties (it is 349 …

Hi, got a similar problem. When running DosBox windowed (on primary monitor, don't have a second one) CPU usage constantly is at 100%, no matter how low I set cycles, and the rest of the system gets completely unresponsive. My config: Athlon 64 FX 55 ATI Radeon X800 XT 2GB RAM Win XP SP 2 ATI …