| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem that it is impossible for a data processor whose nonvolatile built-in storage device is made to store data to store any new data from the term of the restriction of a storage capacity, or that it is impossible to maintain security since the data stored in the storage device are illegally extracted and leaked unless the data stored in the nonvolatile built-in storage device are erased. <P>SOLUTION: When the measurement result of a built-in timer 150 which measures time since a main power supply is disconnected until it is reconnected is relatively short, data stored in a magnetic storage device 14 are backed up by a backup part 18 so as to be read out according to job management information stored in a job management table 170, and the stored contents of the job management table 170 are erased by the backup part 18 when the measurement result of the built-in timer 150 is relatively long so that the data stored in the magnetic storage device 14 can be prevented from being used. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
