| 摘要 |
PURPOSE:To prevent the generation of system down due to a fixed failure in an initial program loading, by disconnecting a failed part of the system before the initial program loading of an operating system. CONSTITUTION:If a parity error exists in tag information read out from a tag section 9-0, a parity error FF15-0 is set, and a deletion FF21-0 is set with a CHECK timing. When the FF21-0 is set, a replacement circuit 8 excludes its way from the objective of replacement. Data in a data section 10-0 are set to a fatch data register 16 and if this data includes a parity error, the FF21-0 is set. If the failure is detected in the process of system effecting processing, the failure is regarded as a fixed failuren and an operation state register 20-i corresponding to the deletion FF-i which is set, is set from a service processor. Then, a way (i) is not usable even if the CPU is set. |
