| 摘要 |
<p>A data processing system of the type of multiple register sets system has an additional main memory (102) for storing instructions and operands and comprises task number specifying means (2105), the task number identifying arbitrary one of a plurality of register sets, number-of-tasks memory means (2106) for memorizing information capable of identifying said plurality of register sets, a random access memory (102), and address generating means (2104) connected with said memory and adapted to produce a physical address of said memory from register specifying information included in an instruction word and said task number, said system being operative to make access to a memory location indicated by a physical address provided by said address generating means upon confirming that the task number specified by said task number specifying means does not exceed a total number of tasks memorized in said number-of-tasks memory means when said instruction is an instruction having access to a register. <IMAGE></p> |
