| 摘要 |
PURPOSE:To improve reliability for discrimination of address information without reducing the data efficiency, by reading the address information recorded in a preceding sector. CONSTITUTION:Each of (n) sectors has a sector address at an ID part. The information of each sector is serially read out, and an address 1 of the (n-1) sector is fed to an ID register 3. Then an address 2 of an (n) sector is fed to an ID register 4, and the address of the (n+1) sector is fed to the register 3. The subtraction is carried out between address data fed to registers 3 and 4 at an arithmetic part 5. The result of this subtraction is fed to a microprogram control part 6 to discriminate the propriety of the address of each register or perform a correction. |
