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SMBIOS Specification 1 2 Document Identifier: DSP0134 3 Date: 2019-10-31 4 Version: 3.4.0a 5 System Management BIOS (SMBIOS) Reference 6 Specification Information for Work-in-Progress version: IMPORTANT: This document is not a standard. It does not necessarily reflect the views of the DMTF or its members. Because this document is a Work in Progress, this document may still change, perhaps profoundly and without notice. This document is available for public review and comment until superseded. Provide any comments through the DMTF Feedback Portal: http://www.dmtf.org/standards/feedback 7 Supersedes: 3.3.0 8 Document Class: Normative 9 Document Status: Work in Progress 10 Document Language: en-US 11 System Management BIOS (SMBIOS) Reference Specification DSP0134 12 Copyright Notice 13 Copyright © 2000, 2002, 2004–2019 DMTF. All rights reserved. 14 DMTF is a not-for-profit association of industry members dedicated to promoting enterprise and systems 15 management and interoperability. Members and non-members may reproduce DMTF specifications and 16 documents, provided that correct attribution is given. As DMTF specifications may be revised from time to 17 time, the particular version and release date should always be noted. 18 Implementation of certain elements of this standard or proposed standard may be subject to third party 19 patent rights, including provisional patent rights (herein "patent rights"). DMTF makes no representations 20 to users of the standard as to the existence of such rights, and is not responsible to recognize, disclose, 21 or identify any or all such third party patent right, owners or claimants, nor for any incomplete or 22 inaccurate identification or disclosure of such rights, owners or claimants. DMTF shall have no liability to 23 any party, in any manner or circumstance, under any legal theory whatsoever, for failure to recognize, 24 disclose, or identify any such third party patent rights, or for such party’s reliance on the standard or 25 incorporation thereof in its product, protocols or testing procedures. DMTF shall have no liability to any 26 party implementing such standard, whether such implementation is foreseeable or not, nor to any patent 27 owner or claimant, and shall have no liability or responsibility for costs or losses incurred if a standard is 28 withdrawn or modified after publication, and shall be indemnified and held harmless by any party 29 implementing the standard from any and all claims of infringement by a patent owner for such 30 implementations. 31 For information about patents held by third-parties which have notified the DMTF that, in their opinion, 32 such patent may relate to or impact implementations of DMTF standards, visit 33 http://www.dmtf.org/about/policies/disclosures.php. 34 This document’s normative language is English. Translation into other languages is permitted. 2 Work in Progress Version 3.4.0a DSP0134 System Management BIOS (SMBIOS) Reference Specification 35 CONTENTS 36 Foreword ....................................................................................................................................................... 9 37 Introduction.................................................................................................................................................. 10 38 Document conventions ........................................................................................................................ 10 39 Typographical conventions ....................................................................................................... 10 40 Document version number conventions ................................................................................... 10 41 1 Scope .................................................................................................................................................. 13 42 1.1 Supported processor architectures ........................................................................................... 13 43 2 Normative references .......................................................................................................................... 13 44 3 Terms and definitions .......................................................................................................................... 15 45 4 Symbols and abbreviated terms .......................................................................................................... 15 46 5 Accessing SMBIOS information .......................................................................................................... 21 47 5.1 General ..................................................................................................................................... 21 48 5.2 Table convention ....................................................................................................................... 22 49 5.2.1 SMBIOS 2.1 (32-bit) Entry Point .................................................................................. 22 50 5.2.2 SMBIOS 3.0 (64-bit) Entry Point .................................................................................. 23 51 6 SMBIOS structures .............................................................................................................................. 25 52 6.1 Structure standards ................................................................................................................... 25 53 6.1.1 Structure evolution and usage guidelines .................................................................... 26 54 6.1.2 Structure header format ............................................................................................... 27 55 6.1.3 Text strings .................................................................................................................. 27 56 6.2 Required structures and data ................................................................................................... 28 57 6.3 SMBIOS fields and CIM MOF properties .................................................................................. 29 58 7 Structure definitions ............................................................................................................................. 30 59 7.1 BIOS Information (Type 0) ........................................................................................................ 30 60 7.1.1 BIOS Characteristics.................................................................................................... 32 61 7.1.2 BIOS Characteristics Extension Bytes......................................................................... 33 62 7.2 System Information (Type 1) .................................................................................................... 34 63 7.2.1 System — UUID ........................................................................................................... 35 64 7.2.2 System — Wake-up Type ............................................................................................ 36 65 7.3 Baseboard (or Module) Information (Type 2) ........................................................................... 36 66 7.3.1 Baseboard — feature flags .......................................................................................... 37 67 7.3.2 Baseboard — Board Type ........................................................................................... 38 68 7.4 System Enclosure or Chassis (Type 3) .................................................................................... 38 69 7.4.1 System Enclosure or Chassis Types ........................................................................... 40 70 7.4.2 System Enclosure or Chassis States........................................................................... 41 71 7.4.3 System Enclosure or Chassis Security Status ............................................................ 42 72 7.4.4 System Enclosure or Chassis — Contained Elements................................................ 42 73 7.5 Processor Information (Type 4) ................................................................................................ 43 74 7.5.1 Processor Information — Processor Type ................................................................... 46 75 7.5.2 Processor Information — Processor Family ................................................................ 47 76 7.5.3 Processor ID field format ............................................................................................. 53 77 7.5.4 Processor Information — Voltage ................................................................................ 54 78 7.5.5 Processor Information — Processor Upgrade ............................................................. 54 79 7.5.6 Processor Information — Core Count.......................................................................... 56 80 7.5.7 Processor Information — Core Enabled ...................................................................... 57 81 7.5.8 Processor Information — Thread Count ...................................................................... 57 82 7.5.9 Processor Characteristics ............................................................................................ 57 83 7.6 Memory Controller Information (Type 5, Obsolete) .................................................................. 58 84 7.6.1 Memory Controller Error Detecting Method ................................................................. 59 85 7.6.2 Memory Controller Error Correcting Capability
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