> There are no tools that do that. > > Just fix your ROMs and use the latest version of MAME. It's not practical to keep 27 > versions of MAME to run your wrong ROMs.
What Sune said. MAWS used to inform the MAME versions a romset changed files but that's all, not further explanation about what changed and where it went. If you ever need romsets for a specific MAME version, you would need a painful collection called "MAME rollback" idling in your hard disk. It's probably even bigger than a complete MAME set without CHDs.
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