| 摘要 |
PURPOSE:To replace and read assuredly data for each field by giving a direct access to each data field of a sector. CONSTITUTION:Different mark patterns M1-M3 are formed for an ID field and data fields 1 and 2. Therefore it is possible to give a direct access to a desired field by designating a sector with an ID code and then a mark pattern field. The data is recorded after 1-8 conversion, and it is defined that a mark pattern is not used to the data although it has the same features as the 1-8 conversion. |
