Description
Lets you set the directory for MAME's hard drive image difference files.
Example
mame <gamename> -diff_directory diff2
Command Format
-diff_directory <path> where <path> is where your difference files are. You can add mutiple paths by using a semicolon ( ; ) between the paths you want. The example sets the difference files path to diff2 so MAME will only look there.
MAME's Default Path
diff