| 摘要 |
PURPOSE:To reduce the number of times of invalidation and to increase the processing speed of invalidation by storing space-classified conversion pairs dependent upon spaces in a conversion index buffer and separatedly storing common conversion pairs independent of spaces. CONSTITUTION:It is discriminated by a conversion index buffer selecting means 1 whether a virtual address is a specific address to a user program or not; and when it is the specific address, a conversion index buffer 2 for common area which does not require the invalidation processing shared among all spaces is selected and the common conversion pair indicating the correspondence between the virtual address and an actual address independent of spaces is stored. When it is not the specific address, one of space-classified conversion index buffers 31-3n which correspond to a designated space is selected, and the space- classified conversion pair indicating the correspondence between the virtual address and the actual address is stored at every one or plural spaces.
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