| 摘要 |
PROBLEM TO BE SOLVED: To achieve the automatic correction of abnormality even when the abnormality of data occurs in an operating system (OS) and a display control program developed in a volatile image memory. SOLUTION: A pattern CPU 311 develops the OS and the display control program in the main RAMs 321 and 3222 from a source ROM 340. In the normal processing, the pattern CPU 311 reads out the OS and the display control program developed in the main RAMs 321 and 322 sequentially to calculate checksum values per fixed amount and compares them with the checksum values previously housed in the source ROM 340. When both the sum values do not coincide with each other, the pattern CPU 311 starts resetting to redevelop the OS and the display control program in the main RAMs 321 and 3222 from the source ROM 340. COPYRIGHT: (C)2008,JPO&INPIT |
