Micron Technology Incorporated

Micron Electronics, Inc.

Jeffrey R Jobs

Thomas A Stenglein

Paul J Voit

A processor-based system includes a processor coupled to a system controller through a processor bus. The system controller is used to couple at least one input device, at least one output device, and at least one data storage device to the processor. Also coupled to the processor bus is a memory hub controller coupled to a memory hub of at least one memory module having a plurality of memory devices coupled to the memory hub. The memory hub is coupled to the memory hub controller through a downstream bus and an upstream bus. The downstream bus has a width of M bits, and the upstream bus has a width of N bits. Although the sum of M and N is fixed, the individual values of M and N can be adjusted during the operation of the processor-based system to adjust the bandwidths of the downstream bus and the upstream bus.

Memory hub architecture having programmable lane widths

A computer system having a primary serial bus and one or more serial sub-busses separated from the primary serial bus by gating devices is described. By selectively enabling different gating devices (thereby coupling one serial sub-bus to the primary serial bus at a time), each sub-bus may support the maximum number of addressable devices. This, in turn, expands the effective serial bus address space of the computer system.

Mechanism to expand address space of a serial bus

A method and system for increasing data retrieval rates for constant angular velocity and hybrid constant linear velocity/constant angular velocity CD-ROM drives. The data stored on CD-ROMs is normally placed starting with the innermost tracks and proceeding outward to the edge of the disk. Any unused or spare capacity occurs as an unused band at the outer edge of the disk. Because access times for files greater than a certain threshold size decrease with increasing radius at which the files are located on a CD-ROM for constant angular velocity and hybrid constant linear velocity/constant angular velocity CD-ROM drives, placing data files at the outer portions of the CD-ROM and leaving unused spare capacity towards the center of the CD-ROM will give better data retrieval rates when the CD-ROM is read in constant angular velocity or hybrid constant linear velocity/constant angular velocity CD-ROM drives.

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Blaine, MN, United States of America

Jeffrey R Jobs