Description
Once you've set up your screen you can set specific resolutions and refresh rates for each screen..
Alternative Command
-r
-resolution0
-r0
-resolution1
-r1
-resolution2
-r2
-resolution3
-r3
Example
mame <gamename> -resolution 1024x768@60
Command Format
<gamename> -numscreens 2 -screen2 \\.\Display2 -resolution2 1024x768@60. This option will force screen 2 of your game to use a the resolution 1024x768 at 60hz. If you specify auto, MAME will try to sort it out itself based on the original screen resolution. -resolution will apply to all screens whilst -resolution0,1,2,3 only applies to the specific screen.
MAME's Default Setting
auto