| 摘要 |
PURPOSE:To make high speed operation of ID change-over control possible by providing plural CPUIDs including own CPUID and providing a CPUID selecting circuit. CONSTITUTION:Each CPU1 is provided with plural CPUIDs for CPU0-CPU1. Further, each CPU is provided with a CPUID selecting circuit S that selects one of CPUID by data of a register R set by a program. Data are set or not set to the register R when an operating system OS is running and CPUID of a type belonging to OS is outputted to the selecting circuit S. Thereby, CPUID of a type to which the OS belongs can be outputted quickly when the OS is running. Thus, high speed operation of ID change-over control becomes possible.
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