| 摘要 |
PROBLEM TO BE SOLVED: To efficiently make access to a limited memory having limitation in erasing or rewriting of data. SOLUTION: A memory management device is constructed of a limited memory allowed to erase and rewrite the data only by a block unit and a free memory consisting of a data maintaining area allowed to process the data freely. For changing the data inside the limited memory, the corresponding block is copied to the free memory, and on the free memory, the data inside the block is rewritten. The block whose data are changed on the free memory is synchronized with the corresponding block on the limited memory if necessary.
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