| 摘要 |
PROBLEM TO BE SOLVED: To reduce the risk that a host system cannot normally operate in a case where update processing of a starting program stored in a flash memory is not normally ended. SOLUTION: The starting program is written in a first area 1b or a second area 1c of the storage space of the flash memory 1, and area instruction information showing the first area 1b or second area 1c in which the starting program is written is written into the flash memory 1. When the host system is started, the starting program is read based on the area instruction information and given to the host system. When a new starting program is written, the new starting program is written into the first area 1b or second area 1c not shown by the area instruction information, and when the writing is ended, the area instruction information is updated. COPYRIGHT: (C)2006,JPO&NCIPI
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