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MCCS Standard Version 3

Monitor Control Command Set

860 Hillview Court, Suite 150 Phone: 408 957 9270

Milpitas, CA 95035 Fax: 408 957-9277

URL: www.vesa.org

VESA Monitor Control Command Set

(MCCS) Standard Version 3

July 27, 2006

Purpose

The purpose of this standard is to define a universal set of commands used to control the screen settings of

displays which can be used within any communication protocol established between the host and display.

This standard also defines requirements for compliance of the MCCS VCP codes.

Summary

This document describes the standardized list of commands and controls to be used in identifying and

controlling the display by means of an application running on the host. The list of commands and controls is

kept to a minimum, while supporting the control of virtually all parameters related to the screen settings in the

display. It does not describe how these commands are packaged in a particular interface protocol.

Further, the document assumes the interface supporting the display can issue an unsolicited attention call

(interrupt) to alert the host that something has happened outside the control of the host. The targeted display

devices are displays attached to the video output of PCs and workstations; however, it is not restricted to this

area.

Version 3 has several purposes, included the correction of some known errors, clarification of the use of

certain VCP codes, new definitions for some VCP codes and the introduction of new VCP codes. This

proposal also withdraws support for two VCP codes (C7h and CBh) which have not achieved their intended

purpose. In addition, a set of compliance requirements are introduced for all of the defined VCP codes except

for the DPVL support group.

MCCS Standard Version 3

Table of Contents

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

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

Preface.........................................................................................................6

History .................................................................................................................................................................9

1 Overview...............................................................................................10

1.1 Summary ..................................................................................................................................................10

1.1 Background .........................................................................................................................................10

1.2 Standard Objectives.............................................................................................................................11

1.3 Terminology Conventions...................................................................................................................11

1.3.1 Keywords....................................................................................................................................................11

1.3.2 VCP Code Type..........................................................................................................................................11

1.3.3 VCP Code Function....................................................................................................................................11

1.3.4 VCP Code Compliance...............................................................................................................................12

1.3.5 Use of ‘Horizontal’, ‘Top’ and ‘Bottom’....................................................................................................12

1.3.6 Data Byte Designations ..............................................................................................................................12

1.4 Reference Documents..........................................................................................................................13

2 Co-Existence of Local and Remote Adjustment Options ......................14

2.1 Remote Adjustment Always Takes Priority ........................................................................................14

2.2 Remote and Local Adjustment May be Active Simultaneously..........................................................14

3 Functional Characteristics.....................................................................15

3.1 Operational Model...............................................................................................................................15

3.2 Implementation of MCCS on Different Interfaces ..............................................................................16

4 Display VCP Codes ..............................................................................17

4.1 VCP Codes That Return More Than 2 Bytes ......................................................................................17

4.2 Control Grouping ................................................................................................................................17

4.2.1 Preset Operations (see section 8.1) .............................................................................................................17

4.2.2 Image Adjustment (see section 8.2)............................................................................................................17

4.2.3 Display Control (see section 8.3)................................................................................................................17

4.2.4 Geometry (see section 8.4) .........................................................................................................................17

4.2.5 Miscellaneous Functions (see section 8.5)..................................................................................................17

4.2.6 Audio Functions (see section 8.6)...............................................................................................................17

4.2.7 DPVL Functions (see section 8.7) ..............................................................................................................17

4.2.8 Manufacturer Specific (see section 8.8)......................................................................................................17

4.3 Control Function..................................................................................................................................18

4.3.1 Continuous Controls ...................................................................................................................................18

4.3.2 Non-continuous Controls............................................................................................................................18

4.3.3 Table Controls ............................................................................................................................................18

4.3.4 Manufacturer-specific Controls. .................................................................................................................18

5 Required VCP Codes............................................................................19

MCCS Standard Version 3

6 Capability String Format & Terminology ...............................................20

6.1 Capability String Compliance .............................................................................................................21

7 Functional Grouping of VCP Codes......................................................22

7.1 Image Adjustments..............................................................................................................................23

7.2 Color Adjustments...............................................................................................................................24

7.3 Image Geometry Adjustment ..............................................................................................................25

7.4 Audio Adjustments..............................................................................................................................26

7.5 Windows Operation.............................................................................................................................27

7.6 DPVL Support.....................................................................................................................................28

8 VCP Code Definitions ...........................................................................29

8.1 Preset Operations VCP Codes .............................................................................................................29

8.2 Image Adjustment VCP Codes............................................................................................................30

8.3 Display Control VCP Codes................................................................................................................53

8.4 Geometry VCP Codes .........................................................................................................................62

8.5 Miscellaneous Functions VCP Codes .................................................................................................67

8.6 Audio Function VCP Codes ................................................................................................................78

8.7 DPVL Support VCP Codes .................................................................................................................81

8.8 Manufacturer Specific VCP Codes .....................................................................................................83

9 Compliance...........................................................................................84

9.1 Overview .............................................................................................................................................84

9.2 Compliance of Manufacturer VCP Codes...........................................................................................84

9.3 Summary of Compliance.....................................................................................................................84

9.4 Compliance Testing – General Points .................................................................................................84

10 Compliance Procedures.....................................................................86

10.1 Introduction......................................................................................................................................86

10.2 Organization of Compliance Procedures .........................................................................................86

10.3 Compliance Procedure for VCP Code 02h – New Control Value...................................................88

10.3.1 Buttonless Display – Verify Read and Write Operation of VCP Code 02h................................................88

10.3.2 Display with Manual Controls – Verify Read and Write of VCP Code 02h ..............................................89

10.4 Compliance Procedure for VCP Code DFh – VCP Version............................................................90

10.5 Compliance Procedure for Capability String...................................................................................91

10.6 Compliance Procedure for Controls with a Continuous Range of Adjustment ...............................92

10.7 Compliance Procedure for Controls with a Non-Continuous Range of Adjustment .......................93

10.8 Compliance Procedure for Preset VCP Codes.................................................................................94

10.9 Compliance Procedures for Auto Set-up and Auto Color Set-up VCP Codes ................................95

MCCS Standard Version 3

10.10 Compliance for 6-axis Color Adjustments ......................................................................................96

10.10.1 Compliance for 6-axis Saturation VCP Codes........................................................................................96

10.10.2 Compliance for 6-axis Hue VCP Codes .................................................................................................97

10.11 Compliance for Read only VCP Codes ...........................................................................................98

10.11.1 Compliance Procedure for Horizontal and Vertical Frequency VCP Codes ..........................................98

10.11.2 Compliance Procedure for Display Usage Time VCP Code...................................................................99

10.11.3 Compliance Procedure for Miscellaneous Read Only VCP Codes.......................................................100

10.11.4 Compliance for Write Only VCP Codes...............................................................................................101

10.11.5 Compliance Procedure for Degauss VCP Code....................................................................................102

10.12 Compliance for Table VCP Codes.................................................................................................103

10.12.1 Compliance Procedure for Input Source and Output Select VCP Codes..............................................103

10.12.2 Compliance Procedure for Source Timing Mode VCP Codes..............................................................104

10.12.3 Compliance Procedure for EDID Operation.........................................................................................105

10.12.4 Compliance Procedure for Auxiliary Display Data VCP Code ............................................................106

10.12.5 Compliance Procedure for Transmit Display Descriptor VCP Code....................................................107

10.12.6 Compliance Procedure for Asset Tag VCP Code .................................................................................108

10.12.7 Compliance Procedure for LUT Size VCP Code..................................................................................109

10.12.8 Compliance Procedure for Single Point LUT Operation VCP Code ....................................................110

10.12.9 Compliance Procedure for Block LUT Operation VCP........................................................................111

10.12.10 Compliance Procedure for Code Remote Procedure Call VCP Code...................................................112

10.12.11 Compliance Procedure for TV-channel Up/Down VCP Code..............................................................113

10.12.12 Compliance Procedure for Auto Set-up On/Off VCP Code .................................................................114

10.12.13 Compliance Procedure for Display Enable Key, VCP Code ................................................................115

11 VCP Code Index...............................................................................116

12 Appendix A: Drawings of Display Geometry.....................................123

13 Appendix B: Implementation Guidance ............................................126

13.1 Support for Multiple Window Operation.......................................................................................126

13.1.1 Window Position VCP Codes (95h → 98h) .............................................................................................126

13.1.2 Window Mask Control VCP Code (A4h) .................................................................................................126

13.1.3 Window Select VCP Code (A5h) .............................................................................................................126

13.1.4 Picture in Picture (PIP) .............................................................................................................................126

13.2 Keeping Local and Remote Operations in Synchronization..........................................................127

14 Appendix C: Glossary of Abbreviations, Acronyms and Terms........129

15 Appendix D: Main Contribution History ............................................130

Tables

Table 1-1: Keyword Conventions.......................................................................................................................................11

Table 1-2: Reference Documents .......................................................................................................................................13

Table 3-1: Generalized Host Requests................................................................................................................................15

Table 6-1: Capability String Abbreviations........................................................................................................................20

Table 8-1: Preset Functions VCP Code Cross-reference....................................................................................................29

Table 8-2: Preset Operations VCP Codes...........................................................................................................................29

Table 8-3: Image Adjustment VCP Code Cross-reference.................................................................................................30

Table 8-4: Image Adjustment VCP Codes .........................................................................................................................31

Table 8-5: Display Control VCP Code Cross-Reference....................................................................................................53

Table 8-6: Display Control VCP Codes .............................................................................................................................53

Table 8-7: Geometry VCP Codes Cross-reference.............................................................................................................62

Table 8-8: Geometry VCP Codes.......................................................................................................................................63

MCCS Standard Version 3

Table 8-9: Miscellaneous Function VCP Code Cross-reference ........................................................................................67

Table 8-10: Miscellaneous Functions VCP Codes .............................................................................................................67

Table 8-11: Audio Function VCP Code Cross-reference ...................................................................................................78

Table 8-12: Audio Function VCP Codes............................................................................................................................78

Table 8-13: DPVL Support Cross-reference.......................................................................................................................81

Table 8-14: DPVL Support VCP Codes.............................................................................................................................81

Table 8-15: Manufacturer Specific VCP Codes .................................................................................................................83

Table 10-1: Compliance Procedures Purpose and Scope....................................................................................................86

Table 10-2: Compliance Procedure (buttonless) for VCP Code 02h..................................................................................88

Table 10-3: Compliance Procedure for VCP Code 02h......................................................................................................89

Table 10-4: Compliance Procedure for VCP Code DFh.....................................................................................................90

Table 10-5: Compliance Procedure for Capability String ..................................................................................................91

Table 10-6: Compliance Procedure for Continuous Range VCP Codes.............................................................................92

Table 10-7: Compliance Procedure for Non-Continuous Range VCP Codes ....................................................................93

Table 10-8: Compliance Procedure for Preset VCP Codes ................................................................................................94

Table 10-9: Compliance Procedure for Auto Set-up VCP Codes.......................................................................................95

Table 10-10: Compliance Procedure for 6-axis Color Saturation Adjustment VCP Codes................................................96

Table 10-11: Compliance Procedure for 6-axis Color Hue VCP Codes............................................................................97

Table 10-12: Compliance Procedure for Horizontal and Vertical Frequency VCP Codes.................................................98

Table 10-13: Compliance Procedure for Display Usage Time VCP Code.........................................................................99

Table 10-14: Compliance Procedure for Other Read only VCP Codes............................................................................100

Table 10-15: Compliance Procedure for Write Only VCP Codes ....................................................................................101

Table 10-16: Compliance Procedure for Degauss VCP Codes.........................................................................................102

Table 10-17: Compliance Procedure for Input Source and Output Select VCP Codes ....................................................103

Table 10-18: Compliance Procedure for Source Timing Mode VCP Code......................................................................104

Table 10-19: Compliance Procedure for EDID Operation VCP Code .............................................................................105

Table 10-20: Compliance Procedure for Auxiliary Display Data VCP Code...................................................................106

Table 10-21: Compliance Procedure for Transmit Display Descriptor VCP Code ..........................................................107

Table 10-22: Compliance Procedure for Asset Tag VCP Code........................................................................................108

Table 10-23: Compliance Procedure for LUT Size VCP Code ........................................................................................109

Table 10-24: Compliance Procedure for Single Point LUT VCP Code ...........................................................................110

Table 10-25: Compliance Procedure for Block LUT VCP Code .....................................................................................111

Table 10-26: Compliance Procedure for Remote Procedure Call VCP Code...................................................................112

Table 10-27: Compliance Procedure for TV-channel Up/Down VCP Code....................................................................113

Table 10-28: Compliance Procedure for Auto Setup On/Off VCP Code .........................................................................114

Table 10-29: Compliance Procedure for Display Enable Key, VCP Code.......................................................................115

Table 11-1 : VCP Code Numeric Index............................................................................................................................116

Table 14-1: Glossary ........................................................................................................................................................129

Table 15-1: Main Contributors to MCCS Version 2 ........................................................................................................130

Table 15-2: Main Contributors to MCCS version 2 Revision 1 .......................................................................................130

Figures

Figure 1-1: Basic Architectural Model ...............................................................................................................................11

Figure 7-1: Image Adjustment VCP Code Tree .................................................................................................................23

Figure 7-2: Color Adjustment VCP Code Tree ..................................................................................................................24

Figure 7-3: Image Geometry Adjustment VCP Code Tree.................................................................................................25

Figure 7-4: Audio Adjustment VCP Code Tree .................................................................................................................26

Figure 7-5: Windows Operation VCP Codes Tree .............................................................................................................27

Figure 7-6: DPVL Support VCP Code Tree.......................................................................................................................28

Figure 12-1: Parallelogram, Trapezoid, Pincushion & Barrel Distortion ........................................................................123

Figure 12-2: Hook, Flare, Linearity & Rotation Distortion..............................................................................................124

Figure 12-3: Mirroring / Flip ............................................................................................................................................125

Figure 13-1: Local and Remote Synchronization .............................................................................................................128

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