A framework environment for logic design support system

A framework for an integrated logic design support system is presented. Owing to the use of this framework, it is easy to develop and add commands which have variable functions for automated logic design. ILOS (integrated logic design system) has been developed using this framework. ILOS supports various design styles because these commands are flexibly combined in the framework. These commands are hierarchical circuit conversion, distributor synthesis, partitioned hierarchical design support, generation of schematic diagrams and logic synthesis, ILOS is used in the design of supercomputers, large-scale computers and medium-scale computers. In large-scale computer design, ILOS reduced manpower costs by 70%.<>