Method and apparatus for utilizing different frequencies on...

Electrical computers and digital data processing systems: input/ – Intrasystem connection – Bus expansion or extension

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C713S501000

Reexamination Certificate

active

06754758

ABSTRACT:

FIELD
The present invention is related to operation, use and control of a bus. More particularly, the present invention is related to the operation, use and control of different operating frequencies of a PCI-X bus.
BACKGROUND
Computer systems may utilize one or more buses as an interconnect transportation mechanism to transfer data between different internal components, such as one or more processors, memory subsystems and input/output (I/O) devices including, for example, keyboards, input mouses, disk controllers, serial and parallel ports to printers, scanners, and display devices. For computer systems using processors such as the 8088, 9086, 80186, i386™ and i486™ microprocessors designed and manufactured by Intel Corporation, such buses have typically been designed as either an Industry Standard Architecture (ISA) bus or an Expanded Industry Standard Architecture (EISA) bus. The ISA bus is a sixteen (16) bit data bus while the EISA bus is thirty-two (32) bits wide. Each of these buses may function at a frequency of eight (8) megahertz. However, the data transfer rates provided by these bus widths and operational frequencies may be limited.
For recent computer systems, such as servers, workstations or personal computers (PCs) using a “Pentium®” family of microprocessors (manufactured by Intel Corporation), for example, such buses may be Peripheral Component Interconnect (PCI) buses. The PCI buses are high performance 32 or 64 bit synchronous buses with automatic configurability and multiplexed address, control and data lines as described in the version of “PCI Local Bus Specification, revision 2.2” set forth by the PCI Special Interest Group (SIG) on Dec. 18, 1998. The PCI architecture may provide the most common method used to extend computer systems for add-on arrangements (e.g., expansion cards) with new video, networking, or disk memory storage capabilities.
When PCI buses are used as an interconnect transportation mechanism in a host system (e.g., server, workstation or PC), data transfer between a processor, a memory subsystem and I/O devices may be executed at high speed. Bridges (or hubs) may be provided to interface and buffer transfers of data between the processor, the memory subsystem, the I/O devices and the PCI buses. Examples of such bridges may include PCI—PCI bridges as described in detail in the “PCI—PCI Bridge Architecture Specification, revision 1.1” set forth by the PCI Special Interest Group (SIG) on Apr. 5, 1995.


REFERENCES:
patent: 5444608 (1995-08-01), Jain et al.
patent: 5875310 (1999-02-01), Buckland et al.
patent: 5937173 (1999-08-01), Olarig et al.
patent: 6008665 (1999-12-01), Kalb et al.
patent: 6108731 (2000-08-01), Suzuki et al.
patent: 6185692 (2001-02-01), Wolford

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method and apparatus for utilizing different frequencies on... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for utilizing different frequencies on..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for utilizing different frequencies on... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3335710

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.