| 摘要 |
PROBLEM TO BE SOLVED: To miniaturize a device and to provide an economically effective transfer control method by writing the contents of a backup memory into the in-device memory of one board where a CPU is mounted. SOLUTION: The backup memory is bisected, a backup memory BU 1 for a board under the control of a CPU 1 is mounted on a substrate CPU 1 board 1 to mount the CPU 1, and a backup memory BU 2 for the board under the control of a CPU 2 is mounted on a substrate CPU 2 board 2 to mount the CPU 2. An in-device memory MEM 1 to be controlled by the CPU 1 is transferred to the backup memory BU 1, and an in-device memory MEM 2 to be controlled by the CPU 2 is transferred to the backup memory BU 2. Besides, the contents of the in-device memory MEM 1 are transferred to the empty area of the in-device memory MEM 2 and the contents of the in-device memory MEM 2 are transferred to the empty area of the in-device memory MEM 1. |
