| 摘要 |
<p>PURPOSE: To cut off a fault part and to let a remaining computer continuously perform operations while accessing the memory module of its own system even when a fault is generated on a communication channel for connecting the computers or in the memory module by equivalently keeping the contents of the memory modules inside the respective computers at all times. CONSTITUTION: When a system bus control part 11 recognizes that a corresponding address is write or read to a memory module area, data are written or read to the corresponding address of a memory array 16 through a memory control part 13. When the access of an internal bus 12 from the system bus control part 11 and the internal bus 12 from an inter-system equivalent communication control part 17 at the time of data reception compete, competition control is performed in bus arbitration circuits 11a and 17a. In such a manner, since the equivalence of the memory modules is guaranteed, even when the computer during the operation as an operating system fails, the computer of a standby system uses only the memory module of its own system and takes over a processing.</p> |
