| 摘要 |
PROBLEM TO BE SOLVED: To hinder falsification and improve security, using an optical disk recording medium being rewritable. SOLUTION: This medium is a rewritable optical disk storage medium having a file control region, an area control region, and a file data region, and storing data about firmware. after initialization is previously performed, firmware discriminating information, firmware index information, and actual data are stored at the head of a part where a file of a file data region is not yet used, as data relating to firmware. COPYRIGHT: (C)2004,JPO
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