It generates info contained within a ROM's header and dumps it into a text file. It's capable of parsing entire directory trees or just a single file.
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File Name : [File name here]
Internal Name : [Name here]
CRC 1 : [CRC 1 here]
CRC 2 : [CRC 2 here]
Entire File MD5 : [MD5 here]
Manufacturer ID : [ID here]
Cartridge ID : [ID here]
Country Code : [Code here]
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Licensed under the WTFPL, go nuts.