| 摘要 |
PROBLEM TO BE SOLVED: To guarantee at least minimum operation even in the case of the fault of a rewritable storage means by controlling an optical equipment based on fixed data in the case the address read out a specified does not match key word and based on the data stored in the rewritable storage means in the case it matches. SOLUTION: This device is provided with an access means for reading out or writing the data by designating the address of the rewritable storage means and a comparison means for comparing the address read out with the specified key word data. In the case the compared result of the comparison means shows that the specified key word is not equal, the optical equipment is controlled based on the fixed data stored in a fixed storage means (ROM of a microcomputer 145). In the case that it is equal, the optical equiment is controlled based on the data stored in the rewritable storage means (EEPROM 146 or flush ROM the microcomputer 145). |
