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VESA Proposed DisplayPort (DP) Standard DISTRIBUTION TO NON-MEMBERS IS PROHIBITED Version 1.4 d1

VESA Proposed DisplayPort (DP) Standard

Version 1.4 d1

3 November, 2015

www.vesa.org

Purpose

The purpose of this document is to define a flexible system and apparatus capable of transporting video,

audio and other data between a Source device and a Sink device over a digital communications interface.

Summary

The DisplayPort standard specifies an open digital communications interface for use in both internal

connections, such as interfaces within a PC or monitor, and external display connections. Suitable external

display connections include interfaces between a PC and monitor or projector, between a PC and TV,

or between a device such as a DVD player and TV display.

DP v1.1a was revised to correct errata items and add clarifications to DP v1.1.

DP v1.2 was revised to add enhancements including higher speed operation, more flexible topology

management, multiple streams on a single connection, higher speed Auxiliary Channel communications,

improved support for audio, and a new smaller connector. It also corrected errors and added clarifications

to DP v1.1a. This version corrects errors and adds clarification to DP v1.2. Furthermore, this version adds

DP_PWR voltage level options to a downstream DisplayPort device.

DP v1.2a was revised to correct errata items and add clarifications to DP v1.2.

DP v1.3 was revised to add 8.1Gbps/lane link rate and living-room friendliness improvement, both for direct

connection to a living room display and through DP-to-HDMI converter.

DP v1.4 was revised to add VESA Display Stream Compression (DSC) transport support for visually lossless

8Kp/10Kp60Hz video along with full extension of audio transport up to 32-channel LPCM audio at 192kHz

and HBR 8-channel audio up to 1536kHz. For visual glitch-free DSC bitstream transport, Reed Solomon

(254, 250) Forward Error Correction (FEC) was added. In addition to the sheer video and audio transport

bandwidth increase, DP v1.4 incorporates metadata transport for both static and dynamic High Dynamic

Range (HDR). Furthermore, DP v1.4 enhances the Multi-stream Transport (MST) feature to better enable

multi-function.

VESA LOGO HERE

DRAFT

VESA Proposed DisplayPort (DP) Standard DISTRIBUTION TO NON-MEMBERS IS PROHIBITED Version 1.4 d1

Contents

Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Intellectual Property . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Patents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Support for this Standard. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

Section 1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

1.1 DisplayPort Standard Organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

1.2 DisplayPort Objectives. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

1.2.1 Key Industry Needs for DisplayPort. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

1.2.2 DisplayPort Technical Objectives. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

1.2.3 DisplayPort External Connection Objectives . . . . . . . . . . . . . . . . . . . . . . . . . .41

1.2.4 DisplayPort Internal Connection Objectives. . . . . . . . . . . . . . . . . . . . . . . . . . .42

1.2.5 DisplayPort CE Connection Objectives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

1.2.6 Content Protection for DisplayPort. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

1.3 Acronyms, Initializations, and Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

1.4 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

1.5 Reference Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

1.6 Nomenclature for Bit and Byte Ordering. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

1.6.1 Bit Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

1.6.2 Byte Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

1.7 Overview of DisplayPort . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

1.7.1 Makeup of the Main-Link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

1.7.2 Makeup of AUX CH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

1.7.3 Link Configuration and Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

1.7.4 Layered Modular Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

Section 2 Link Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

2.1 SST Mode Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64

2.1.1 Number of Lanes and Per-lane Data Rate

(Applicable in both SST and MST Modes). . . . . . . . . . . . . . . . . . . . . . . . . . . .65

2.1.2 Number of Main, Uncompressed Video Streams in SST Mode . . . . . . . . . . . .65

2.1.3 Basic Functions (Applicable in both SST and MST Modes) . . . . . . . . . . . . . .65

2.1.4 DisplayPort Device Types and Link Topology in SST Mode . . . . . . . . . . . . .66

DRAFT

VESA Proposed DisplayPort (DP) Standard DISTRIBUTION TO NON-MEMBERS IS PROHIBITED Version 1.4 d1

2.2 Isochronous Transport Services in SST Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71

2.2.1 Main Stream to Main-Link Lane Mapping in the Source Device. . . . . . . . . . .72

2.2.2 Stream Reconstruction in the Sink Device . . . . . . . . . . . . . . . . . . . . . . . . . . .122

2.2.3 Stream Clock Regeneration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .122

2.2.4 Main Stream Attribute Data Transport . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .126

2.2.5 SDP Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .136

2.2.6 ECC for SDP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .209

2.3 AUX CH States and Arbitration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .215

2.3.1 AUX CH STATES Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .215

2.3.2 Link Layer Arbitration Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .220

2.3.3 Policy Maker AUX Services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .220

2.3.4 Detailed DPTX AUX CH State and Event Description . . . . . . . . . . . . . . . . .221

2.3.5 Detailed DPRX AUX CH State and Event Description . . . . . . . . . . . . . . . . .222

2.4 Overview of DP MST Isochronous Transport Service . . . . . . . . . . . . . . . . . . . . . . . .223

2.4.1 Connection-oriented Transport . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .225

2.4.2 Layers of DP Isochronous Transport Service . . . . . . . . . . . . . . . . . . . . . . . . .227

2.4.3 Sideband CH Communications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .231

2.5 Topology Management Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .232

2.5.1 Primitives of MST DP Devices and Device Types. . . . . . . . . . . . . . . . . . . . .233

2.5.2 MST Topologies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .236

2.5.3 MST Device Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .237

2.5.4 Topology Manager and Topology Assistant. . . . . . . . . . . . . . . . . . . . . . . . . .239

2.5.5 Topology Discovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .239

2.5.6 Topology Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .240

2.5.7 Topologies with SST-only Source devices . . . . . . . . . . . . . . . . . . . . . . . . . . .241

2.5.8 Loop Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .242

2.6 MST Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .243

2.6.1 Enumeration of Path Constraints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .248

2.6.2 Link Timing Generation Based on Multi-Stream Transport Packet . . . . . . . .258

2.6.3 Symbol Sequence Mapping into VC Payload. . . . . . . . . . . . . . . . . . . . . . . . .259

2.6.4 Time Slot Count Allocation to VC Payload . . . . . . . . . . . . . . . . . . . . . . . . . .270

2.6.5 VC Payload Allocation Synchronization Management . . . . . . . . . . . . . . . . .280

2.6.6 ALLOCATE_PAYLOAD Timing Sequence . . . . . . . . . . . . . . . . . . . . . . . . .285

2.6.7 Impacts of Various Events on VC Payload ID Table . . . . . . . . . . . . . . . . . . .293

2.6.8 Robustness Requirement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .296

2.6.9 Control Functions, Control Symbols, and K-Code Assignment. . . . . . . . . . .297

2.6.10 Conversion between MST and SST Symbol Mapping . . . . . . . . . . . . . . . . . .298

2.6.11 MTPH Usages for CP Extension in MST Mode. . . . . . . . . . . . . . . . . . . . . . .300

2.7 Compressed Display Stream Transport Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . .302

2.7.1 Transport Buffer Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .302

2.7.2 Configuration – Discovery, Enabling, and Disabling . . . . . . . . . . . . . . . . . . .303

2.7.3 Minimum Slices Per Line Requirement . . . . . . . . . . . . . . . . . . . . . . . . . . . . .306

DRAFT

VESA Proposed DisplayPort (DP) Standard DISTRIBUTION TO NON-MEMBERS IS PROHIBITED Version 1.4 d1

2.8 AUX Transaction Syntax in Manchester Transaction Format. . . . . . . . . . . . . . . . . . .309

2.8.1 Command Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .311

2.8.2 AUX Transaction Response/Reply Timeouts . . . . . . . . . . . . . . . . . . . . . . . . .314

2.8.3 Native AUX Request Transaction Syntax. . . . . . . . . . . . . . . . . . . . . . . . . . . .314

2.8.4 Native AUX Reply Transaction Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . .315

2.8.5 I2C Bus Transaction Mapping onto AUX Syntax . . . . . . . . . . . . . . . . . . . . .316

2.8.6 Conversion of I2C Transaction to Native AUX Transaction (Informative) . .336

2.8.7 I2C-over-AUX Transaction Clarifications and Implementation Rules . . . . .336

2.9 AUX Services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .352

2.9.1 Stream Transport Initiation Sequence. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .353

2.9.2 Stream Transport Termination Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . .354

2.9.3 DPCD Field Address Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .355

2.9.4 AUX Link Services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .477

2.9.5 AUX Device Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .483

2.10 Alternate Scrambler Reset for eDP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .484

2.10.1 Protocol Differentiation Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .484

2.10.2 Symbol Error Rate Measurement Pattern Output (Informative). . . . . . . . . . .484

2.11 Messaging AUX Client . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .486

2.11.1 Messaging AUX Client Layers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .488

2.11.2 Message Transaction Layer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .490

2.11.3 Sideband MSG Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .500

2.11.4 AUX Support for Messaging AUX Client . . . . . . . . . . . . . . . . . . . . . . . . . . .506

2.11.5 RAD Updated by MST Devices in the Path . . . . . . . . . . . . . . . . . . . . . . . . . .509

2.11.6 Broadcast Message Transactions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .510

2.11.7 Message Delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .511

2.11.8 Error Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .515

2.11.9 Descriptions of Available Message Transaction Requests . . . . . . . . . . . . . . .518

2.12 Audio-to-Video and Audio-to-Audio Synchronization . . . . . . . . . . . . . . . . . . . . . . . .538

2.12.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .538

2.12.2 DisplayPort AV Sync Data Block. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .539

2.12.3 Delay Compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .540

2.13 Global Time Code and Audio Inter-channel Sync. . . . . . . . . . . . . . . . . . . . . . . . . . . .546

2.13.1 Global Time Code. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .547

2.13.2 Application of GTC for Audio Inter-channel Synchronization . . . . . . . . . . .560

Section 3 PHY Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 562

3.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .562

3.1.1 PHY Layer Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .563

3.1.2 Link-PHY Layer Interface Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .564

3.1.3 PHY Layer and Link Media Interface Signals . . . . . . . . . . . . . . . . . . . . . . . .565

3.1.4 Compliance Measurement Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .566

3.1.5 Electrical Signal Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .574

3.1.6 Scrambling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .577

3.1.7 Symbol Coding and Serialization/De-serialization. . . . . . . . . . . . . . . . . . . . .578

DRAFT

VESA Proposed DisplayPort (DP) Standard DISTRIBUTION TO NON-MEMBERS IS PROHIBITED Version 1.4 d1

3.2 DP_PWR for Box-to-Box DisplayPort Connection. . . . . . . . . . . . . . . . . . . . . . . . . . .579

3.2.1 DP_PWR User Detection Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .581

3.2.2 DP_PWR Wire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .581

3.2.3 Inrush Energy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .581

3.2.4 Voltage Droop. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .582

3.2.5 Over-Current Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .582

3.3 Hot Plug/Unplug Detect Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .583

3.4 AUX Channel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .585

3.4.1 AUX Channel Logical Sub-block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .586

3.4.2 AUX Channel Electrical Sub-block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .587

3.5 Main-Link. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .591

3.5.1 Main-Link Logic Sub-block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .591

3.5.2 Main-Link Electrical Sub-block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .626

3.5.3 ESD and EOS Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .653

3.6 Link Training-tunable PHY Repeater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .654

3.6.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .654

3.6.2 Signal Routing Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .657

3.6.3 DPCD Address Mapping for LT-tunable PHY Repeater . . . . . . . . . . . . . . . .658

3.6.4 LT-tunable PHY Repeater DPCD Registers . . . . . . . . . . . . . . . . . . . . . . . . . .660

3.6.5 AUX Transactions Handling Requirements . . . . . . . . . . . . . . . . . . . . . . . . . .662

3.6.6 Link Training . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .667

3.6.7 Dual Mode Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .680

3.6.8 LT-tunable PHY Repeater Electrical Specification Requirements. . . . . . . . .681

Section 4 Mechanical. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 682

4.1 Cable-Connector Assembly Specifications (for Box-to-box) . . . . . . . . . . . . . . . . . . .682

4.1.1 Cable-Connector Assembly Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .683

4.1.2 Type of Bulk Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .687

4.1.3 Impedance Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .688

4.1.4 Insertion Loss and Return Loss. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .691

4.1.5 High Bit Rate Cable-Connector Assembly Specification . . . . . . . . . . . . . . . .692

4.1.6 Reduced Bit Rate Cable-Connector Assembly Specification . . . . . . . . . . . . .702

4.2 Connector Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .706

4.2.1 External Full-size Connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .706

4.2.2 Mini DisplayPort External Connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .719

4.2.3 Panel-side Internal Connector (Informative) . . . . . . . . . . . . . . . . . . . . . . . . .739

Section 5 Source/Sink/Branch Device Policy Requirements for Interoperability . . . . . . . 748

5.1 Source Device in SST Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .748

5.1.1 Stream Source Requirement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .748

5.1.2 Source Device Link Configuration Requirement . . . . . . . . . . . . . . . . . . . . . .752

5.1.3 Source Device Behavior on Stream Timing Change . . . . . . . . . . . . . . . . . . .754

5.1.4 Source Device Behavior upon HPD Pulse Detection . . . . . . . . . . . . . . . . . . .755

5.1.5 Downstream Device DPRX Power Management by a Source Device . . . . . .756

5.1.6 Source Device Connected to a Branch Device . . . . . . . . . . . . . . . . . . . . . . . .757

5.1.7 Source Device DSC Bitstream Transport and FEC Policy . . . . . . . . . . . . . . .758

5.1.8 MSA Horizontal Blanking Expansion Operation Support . . . . . . . . . . . . . . .759

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