Patent ID: 6868471
Filing Date: 2005-03-15
Classification: G06F

Abstract:
1. A memory address space extension device comprising: a definition table for defining an access right of a task with respect to a data area; a definition table forming means for forming said definition table; an access right judgement means for judging, according to said definition table, whether or not the access right to the data area requested by the task should be provided with respect to the task, and said access right judgement means judges whether or not said task is permitted access according to an interruption processing number; and an address operational means for converting a CPU address into an extended address, and a memory having the extended address converted previously, said address operational means causing said CPU address to be converted into the extended address when said task is permitted access to said data area according to said access right judgement means, before said memory with extended address supports said address operational means.