| 摘要 |
PROBLEM TO BE SOLVED: To include, inside a bus bridge circuit, an access monitoring function on a bus, and to provide a bus bridge circuit for duplexed device that efficiently performs duplexing only by one access. SOLUTION: This invented bus bridge circuit for duplexed device includes bus bridge circuits 21, 31 that monitor read/write access to a memory device in an operational system and when the access occurs, copy its data and write it into a memory device in a backup system. |
