romident
Option Category #
# FRONTEND COMMANDS
#
Description This option attempts to identify ROM files, if they are known to MAME, in the specified .zip file or directory. This can be useful if you've downloaded a file and it isn't named correctly.

MAME will give you an error of 0-9 depending on whether it knows what the rom is. Errors are...

0: means all files were identified
7: means all files were identified except for 1 or more "non-ROM" files
8: means some files were identified
9: means no files were identified
Full Command -romident <filename>
Alt. Command none
Reverse Command none
Example mame64 -romident something.zip
mame.ini Command none
Command Default none
Argument Format <filename>