| 摘要 |
PROBLEM TO BE SOLVED: To enable collective management of a memory region to be protected in a memory protection method wherein the memory region to be protected is specified by a program via registers even when memory regions to be protected are different between a plurality of jobs by making access to a memory protection controlling unit by the respective jobs impossible. SOLUTION: A memory protection address management table, a memory protection management unit, a memory protection control unit and an access procedure by an identifier from a plurality of jobs to the protection management unit are provided. An access to the memory protection control unit, an access thereto is controlled, is made only from the memory protection management unit. From the above configuration, one memory protection management can be uniquely determined by uniquely switching a protection address managed by the memory protection management unit by a unique identifier at activating a job. COPYRIGHT: (C)2003,JPO
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