Nec Corporation

Zenith Data Systems Corporation

Packard Bell Nec

Honeywell Information Systems Inc.

G Lewis Steiner

Thomas F Joyce

Jian-Kuo Shen

Chester M Nibby, Jr

Bruno DiPlacido, Jr

Jeffrey S Somers

Thomas L Murray, Jr

Michelle A Pence

James F Bertone

Marc Sanfacon

Martin Massucci

Lance J McNally

William S Wu

Suresh K Marisetty

Norman J Rasmussen

Puthiya K Nizar

Richard A Lemay

William E Woods

Richard P Brown

Lance T McNally

The invention is directed to a memory controller for use with memory having varying timing characteristics. In particular, the timing characteristics of the various memory devices are determined and used to generate timing signals commensurate with each particular memory device.

Symmetric multiprocessing system with unified environment and distributed system functions

A symmetric multiprocessing system with a unified environment and distributed system functions provides unified address space for all functional units in the system while distributing the execution of various system functions over the functional units of the system whereby each functional unit assumes responsibility for its own aspects of these operations. In addition, the system provides improved system bus operation for transfer of data from memory.

Symmetric multiprocessing system with unified environment and

Timing calculator means in a computer system are used to adaptively generate an appropriate access signal, to one of a plurality of memory types, based on first and second timing control values, wherein the first timing control value represents information specific to and limited to the start of a memory operation and wherein the second timing control value represents information representing other timing events. That is, the state machine of the present invention requires a distinct starting control value, separate from other timing values, for calculation of appropriate memory access parameters.

Adaptively generating timing signals for access to various memory

A priority resolver for providing unambiguous resolution of requests among competing processes vying for access to a common device and which is adapted to a non-distributed environment.

Two stage selection based on time of arrival and predetermined priority

Growing community of inventors

Milford, MA, United States of America

G Lewis Steiner