Emulation speed is slower than the real arcade.

While there is no a framerate drop and games run at full speed with D3D there is 'slower' gameplay and 'slower' graphics movement (graphics display sync) than Opengl. It becomes even more 'slow' when Triple Buffering or Vsync is enabled.

Which is faster in MAME, Opengl or D3D?

Id captured now. I didn't know that. But can i print a larger image?

When i try to capture a image on mame's menu and inside
a game i get a black screen when i paste it to graphics program. What should i do?

I configured MAME to not use scanlines but i still get em at higher resolutions.

I get scanlines without want it at high resolutions beyond 1600x1200@85. (1600x1200@85 resolution only produces scanlines on the Mame's menu but not in game). I want to use very high resolution in Mame to eliminate pixelization, restore original game clarity and blocky image as high resolution it he...

What is the maximum value i can set to the Prescale setting in
mame.ini file in the latest version of mame? I thing it reverts to default 1 when i put a higher number to this setting without knowing the maximum value mame supports. I must find out the real values.

No. Does not explains maximum and minimum value mame accepts.

What is the maximum value for prescale option and what is the minimum value? What is the minimum option for completely disable prescale option without upscaling? Also where in mame.ini file of Mame i must put resolution option and how for selecting a resolution? Also can i use -0 or 0 for disabling ...