| 摘要 |
PURPOSE:To effect a security protection by fitting freely attachably and detachably the attachment part called as a buffer adapter effecting a bit conversion to a magnetic disk processing device. CONSTITUTION:When the writing of data is performed in a magnetic disk from the state of fitting a buffer adapter 5 to a fitting part 6, writing data 101-103 are written in the magnetic disk as the writing output data 104-106 of which bit position is converted by a conversion writing buffer 3. When the reading from the magnetic disk of the data written by converting its bit position is performed, reading input data 107-109 are read as the reading data 110-112 restored with its bit position being adversely converted by a conversion reading buffer 4. The security protection by the bit conversion of data can be effected by fitting freely attachably and detachably such a buffer adapter 5. |
