Apparatus and method for concurrently executing plural tasks in which identifiers specify steps in tasks

摘要

An information processing device which operates under a multiprogramming system stores instruction words and an execution condition word for each of those instruction words as a pair in program memories, judges whether or not an instruction can be executed on the basis of its execution condition word and executes the instruction when it is judged to be executable. An information processing device which operates under a multi-CPU system connects a plurality of memories to a plurality of CPUs. The plurality of memories store the global variables accessed most frequently by the CPU with which their own memories are connected.