Data General Corporation

John E Shur

Stephen A Caldara

Salvatore Faletra

John R McDaniel

Kenneth S Goekjian

Donald J Barbarits

A data processing system is disclosed in which a plurality of high performance, intelligent, mass storage input-output devices are linked to a host controller by an input-output interface bus which is divided into three sections. Each section is completely independent of the other two sections and used for a different and specific purpose. One section is used to transfer commands and retrieve status information. A second section is used to handle device requests for data transfer and device signals for operation complete. The third section is used to transfer data to and from a device. Since the three sections are completely independent, simultaneous transfer of command control and data to different input-output devices or to a single input-output device can be performed.

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Stratham, NH, United States of America

John E Shur