listmedia
Option Category #
# FRONTEND COMMANDS
#
Description This option will generate a list any media used by systems.

If you add a system name after the -listmedia it will only tell you the information for that system. There is a wildcard option that will let you generate a list containing systems of certain names e.g. -listmedia mslug* will generate a list of systems starting with mslug. If you want to direct the list to a text file then use this command mame64 -listmedia >listmedia.txt. Again you can use this on a specific system by adding the system name after the -listmedia.
Full Command -listmedia <system|wildcard>
Alt. Command -lm
Reverse Command none
Example mame64 -listmedia spectrum
mame.ini Command none
Command Default none
Argument Format <system|wildcard>