Article Free Access Share on Timing optimization on mapped circuits Authors: Ko Yoshikawa NEC Corporation, 1-10 Nisshin-cho, Fuchu-city, Tokyo, Japan NEC Corporation, 1-10 Nisshin-cho, Fuchu-city, Tokyo, JapanView Profile , Hiroshi Ichiryu NEC Corporation, 1-10 Nisshin-cho, Fuchu-city, Tokyo, Japan NEC Corporation, 1-10 Nisshin-cho, Fuchu-city, Tokyo, JapanView Profile , Hisato Tanishita NEC Corporation, 1-10 Nisshin-cho, Fuchu-city, Tokyo, Japan NEC Corporation, 1-10 Nisshin-cho, Fuchu-city, Tokyo, JapanView Profile , Sigenobu Suzuki NEC Corporation, 1-10 Nisshin-cho, Fuchu-city, Tokyo, Japan NEC Corporation, 1-10 Nisshin-cho, Fuchu-city, Tokyo, JapanView Profile , Nobuyoshi Nomizu NEC Corporation, 1-10 Nisshin-cho, Fuchu-city, Tokyo, Japan NEC Corporation, 1-10 Nisshin-cho, Fuchu-city, Tokyo, JapanView Profile , Akira Kondoh NEC Corporation, 1-10 Nisshin-cho, Fuchu-city, Tokyo, Japan and NEC Engineering Corp. NEC Corporation, 1-10 Nisshin-cho, Fuchu-city, Tokyo, Japan and NEC Engineering Corp.View Profile Authors Info & Claims DAC '91: Proceedings of the 28th ACM/IEEE Design Automation ConferenceJune 1991 Pages 112–117https://doi.org/10.1145/127601.127639Published:01 June 1991Publication History 17citation216DownloadsMetricsTotal Citations17Total Downloads216Last 12 Months12Last 6 weeks2 Get Citation AlertsNew Citation Alert added!This alert has been successfully added and will be sent to:You will be notified whenever a record that you have chosen has been cited.To manage your alert preferences, click on the button below.Manage my AlertsNew Citation Alert!Please log in to your account Save to BinderSave to BinderCreate a New BinderNameCancelCreateExport CitationPublisher SiteeReaderPDF

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%.>

A technology mapping system, used for computer design in NEC, is presented. The features of this system are technology conversion and logical/physical optimization, based on a rule base, partitioning support, conversion verification and special layout consideration. This system is practically used for many applications for technology mapping, including redesigning an existing total unit into a new unit, based on up-to-date LSI technology. The resulting effect is quick inputting of integrated circuit technology progress into practical computer design area.

An integrated design system using CAD tools, which was applied to the design of the supercomputer (SX-1, SX-2), is described. The key points for designing the large system are a short design cycle, high productivity, high quality and user-friendly interface to the CAD system. Three strategies have been adopted: engineering work station utilization, thorough verification in an early design stage and establishment of a design flow using CAD tools. By the CAD system based on those strategies, a supercomputer with high quality was successfully designed in a short time.