Rewritable ROM file device having read/write buffer access control via copy of rewritable area
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United States of America Patent
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Aug 3, 1999
Grant Date -
N/A
app pub date -
Nov 2, 1995
filing date -
Nov 24, 1994
priority date (Note) -
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Abstract
A rewritable read only memory (ROM) file device having a special area storing a directory, a file allocation table, and a rewritable area. An access controller copies the content of the special area into a buffer by an initialization process. After the initialization process, the access controller converts subsequent access requests to the special area of the ROM file device into an access to the buffer. The access controller detects a termination of a use of the ROM file device and, in response, returns the data stored in the buffer to the device's special area.
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