Pentium(R) Pro Processor Specification Update

This document is an update to the specifications contained in the PentiumŪ Pro Processor Family Developer's Manuals, (Order Numbers 242690, 242691 and 242692). It is intended for hardware system manufacturers and software developers of applications, operating systems, or tools. It contains Specification Changes, S-Specs, Errata, Specification Clarifications, and Documentation Changes. The Pentium Pro processor may contain design defects or errors known as errata. Characterized errata that may cause the Pentium Pro processors' behavior to deviate from published specifications are documented in the specification updates.

  • Specification Changes are modifications to the current published specifications. These changes will be incorporated in the next release of the specifications.
  • S-Specs are exceptions to the published specifications, and apply only to the units assembled under the s-spec.
  • Errata are design defects or errors. Errata may cause the PentiumŪ Pro processors behavior to deviate from published specifications. Hardware and software designed to be used with any given stepping must assume that all errata documented for that stepping are present on all devices.
  • Specification Clarifications describe a specification in greater detail or further highlight a specification's impact to a complex design situation. These clarifications will be incorporated in the next release of the specifications.
  • Documentation Changes include typos, errors, or omissions from the current published specifications. These changes will be incorporated in the next release of the specifications.

This location contains the most current Specification Update. The revision number is indicated by the last two digits in its 'pdf' file name. Specification Updates are revised only as changes occur.

The Specification Update should be publicly available following the last shipment date for a period of time equal to the specific product's warranty period. Hardcopy Specification Updates will be available for one (1) year following End of Life(EOL). Web access will be available for three (3) years following EOL.

If a new revision is created, it will be posted per the following 1998 schedule:
Jan 14, Feb 11, Mar 11, Apr 15, May 13, Jun 10, Jul 15, Aug 12, Sep 09, Oct 14, Nov 11, Dec 09.

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