| 摘要 |
PROBLEM TO BE SOLVED: To prevent an obstacle caused by invalid data in a common memory in a host unit being a new operation system. SOLUTION: In this CPU system, the host unit constitutes a redundant configuration, only the host unit of the operation system can access, it has a common memory 3 arranged on a common bus, and processing is transferred when switching system of the host unit. A condition of the common bus at timing when switching of system of the host unit occurs is held. COPYRIGHT: (C)2006,JPO&NCIPI
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