/** @file

Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>

This program and the accompanying materials                          
are licensed and made available under the terms and conditions
of the BSD License which accompanies this distribution.  The
full text of the license may be found at
http://opensource.org/licenses/bsd-license.php                                            
                                                                                          
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             

Module Name:

  VesaBiosExtensions.h

Abstract:

Revision History

--*/

#ifndef _VESA_BIOS_EXTENSIONS_H_
#define _VESA_BIOS_EXTENSIONS_H_

//
// Turn on byte packing of data structures
//
#pragma pack(1)
//
// VESA BIOS Extensions status codes
//
#define VESA_BIOS_EXTENSIONS_STATUS_SUCCESS 0x004f

//
// VESA BIOS Extensions Services
//
#define VESA_BIOS_EXTENSIONS_RETURN_CONTROLLER_INFORMATION  0x4f00

/*++

  Routine Description:
    Function 00 : Return Controller Information

  Arguments:
    Inputs:
      AX    = 0x4f00
      ES:DI = Pointer to buffer to place VESA_BIOS_EXTENSIONS_INFORMATION_BLOCK structure
    Outputs:
      AX    = Return Status

--*/
#define VESA_BIOS_EXTENSIONS_RETURN_MODE_INFORMATION  0x4f01

/*++

  Routine Description:
    Function 01 : Return Mode Information

  Arguments:
    Inputs:
      AX    = 0x4f01
      CX    = Mode Number
      ES:DI = Pointer to buffer to place VESA_BIOS_EXTENSIONS_MODE_INFORMATION_BLOCK structure
    Outputs:
      AX    = Return Status

--*/
#define VESA_BIOS_EXTENSIONS_SET_MODE 0x4f02

/*++

  Routine Description:
    Function 02 : Set Mode

  Arguments:
    Inputs:
      AX    = 0x4f02
      BX    = Desired mode to set
        D0-D8   = Mode Number
        D9-D10  = Reserved (must be 0)
        D11     = 0 - Use current default refresh rate
                = 1 - Use user specfieid CRTC values for refresh rate
        D12-D13 = Reserved (must be 0)
        D14     = 0 - Use windowed frame buffer model
                = 1 - Use linear/flat frame buffer model
        D15     = 0 - Clear display memory
                = 1 - Don't clear display memory
      ES:DI = Pointer to buffer to the VESA_BIOS_EXTENSIONS_CRTC_INFORMATION_BLOCK structure
    Outputs:
      AX    = Return Status

--*/
#define VESA_BIOS_EXTENSIONS_RETURN_CURRENT_MODE  0x4f03

/*++

  Routine Description:
    Function 03 : Return Current Mode

  Arguments:
    Inputs:
      AX    = 0x4f03
    Outputs:
      AX    = Return Status
      BX    = Current mode
        D0-D13  = Mode Number
        D14     = 0 - Windowed frame buffer model
                = 1 - Linear/flat frame buffer model
        D15     = 0 - Memory cleared at last mode set
                = 1 - Memory not cleared at last mode set

--*/
#define VESA_BIOS_EXTENSIONS_SAVE_RESTORE_STATE 0x4f04

/*++

  Routine Description:
    Function 04 : Save/Restore State

  Arguments:
    Inputs:
      AX    = 0x4f03
      DL    = 0x00 - Return Save/Restore State buffer size
            = 0x01 - Save State
            = 0x02 - Restore State
      CX    = Requested Status
        D0  = Save/Restore controller hardware state
        D1  = Save/Restore BIOS data state
        D2  = Save/Restore DAC state
        D3  = Save/Restore Regsiter state
      ES:BX = Pointer to buffer if DL=1 or DL=2
    Outputs:
      AX    = Return Status
      BX    = Number of 64 byte blocks to hold the state buffer if DL=0

--*/
#define VESA_BIOS_EXTENSIONS_EDID  0x4f15

/*++

  Routine Description:
    Function 15 : implement VBE/DDC service

  Arguments:
    Inputs:
      AX    = 0x4f15
      BL    = 0x00 - Report VBE/DDC Capabilities
      CX    = 0x00 - Controller unit number (00 = primary controller)
      ES:DI = Null pointer, must be 0:0 in version 1.0
    Outputs:
      AX    = Return Status
      BH    = Approx. time in seconds, rounded up, to transfer one EDID block(128 bytes)
      BL    = DDC level supported
        D0  = 0 DDC1 not supported
            = 1 DDC1 supported
        D1  = 0 DDC2 not supported
            = 1 DDC2 supported
        D2  = 0 Screen not blanked during data transfer
            = 1 Screen blanked during data transfer

    Inputs:
      AX    = 0x4f15
      BL    = 0x01 - Read EDID
      CX    = 0x00 - Controller unit number (00 = primary controller)
      DX    = 0x00 - EDID block number
      ES:DI = Pointer to buffer in which the EDID block is returned
    Outputs:
      AX    = Return Status
--*/

//
// Timing data from EDID data block
//
#define VESA_BIOS_EXTENSIONS_EDID_BLOCK_SIZE                    128
#define VESA_BIOS_EXTENSIONS_EDID_ESTABLISHED_TIMING_MAX_NUMBER 17
#define VESA_BIOS_EXTENSIONS_EDID_STANDARD_TIMING_MAX_NUMBER 8
#define VESA_BIOS_EXTENSIONS_EDID_ADDITIONAL_TIMING_MAX_NUMBER 24
#define DETAILED_TIMING_DESCRIPTIONS_START	0x36
#define DETAILED_TIMING_DESCRIPTION_SIZE	18
#define NO_DETAILED_TIMING_DESCRIPTIONS		4

typedef struct {
  UINT16  HorizontalResolution;
  UINT16  VerticalResolution;
  UINT16  RefreshRate;
} VESA_BIOS_EXTENSIONS_EDID_TIMING;

typedef struct {
  UINT32  ValidNumber;
  UINT32  Key[VESA_BIOS_EXTENSIONS_EDID_ESTABLISHED_TIMING_MAX_NUMBER + NO_DETAILED_TIMING_DESCRIPTIONS + 
              VESA_BIOS_EXTENSIONS_EDID_STANDARD_TIMING_MAX_NUMBER +
              VESA_BIOS_EXTENSIONS_EDID_ADDITIONAL_TIMING_MAX_NUMBER];
} VESA_BIOS_EXTENSIONS_VALID_EDID_TIMING;

typedef struct {
  UINT8   Header[8];                        //EDID header "00 FF FF FF FF FF FF 00"
  UINT16  ManufactureName;                  //EISA 3-character ID
  UINT16  ProductCode;                      //Vendor assigned code
  UINT32  SerialNumber;                     //32-bit serial number
  UINT8   WeekOfManufacture;                //Week number
  UINT8   YearOfManufacture;                //Year
  UINT8   EdidVersion;                      //EDID Structure Version
  UINT8   EdidRevision;                     //EDID Structure Revision
  UINT8   VideoInputDefinition;
  UINT8   MaxHorizontalImageSize;           //cm
  UINT8   MaxVerticalImageSize;             //cm
  UINT8   DisplayTransferCharacteristic;
  UINT8   FeatureSupport;
  UINT8   RedGreenLowBits;                  //Rx1 Rx0 Ry1 Ry0 Gx1 Gx0 Gy1Gy0
  UINT8   BlueWhiteLowBits;                 //Bx1 Bx0 By1 By0 Wx1 Wx0 Wy1 Wy0
  UINT8   RedX;                             //Red-x Bits 9 - 2
  UINT8   RedY;                             //Red-y Bits 9 - 2
  UINT8   GreenX;                           //Green-x Bits 9 - 2
  UINT8   GreenY;                           //Green-y Bits 9 - 2
  UINT8   BlueX;                            //Blue-x Bits 9 - 2
  UINT8   BlueY;                            //Blue-y Bits 9 - 2
  UINT8   WhiteX;                           //White-x Bits 9 - 2
  UINT8   WhiteY;                           //White-x Bits 9 - 2
  UINT8   EstablishedTimings[3];
  UINT8   StandardTimingIdentification[16];
  UINT8   DetailedTimingDescriptions[72];
  UINT8   ExtensionFlag;                    //Number of (optional) 128-byte EDID extension blocks to follow
  UINT8   Checksum;
} VESA_BIOS_EXTENSIONS_EDID_DATA_BLOCK;

//
// Super VGA Information Block
//
typedef struct {
  UINT32  VESASignature;      // 'VESA' 4 byte signature
  UINT16  VESAVersion;        // VBE version number
  UINT32  OEMStringPtr;       // Pointer to OEM string
  UINT32  Capabilities;       // Capabilities of video card
  UINT32  VideoModePtr;       // Pointer to an array of 16-bit supported modes values terminated by 0xFFFF
  UINT16  TotalMemory;        // Number of 64kb memory blocks = 0x7b=7872kb
  UINT16  OemSoftwareRev;     // VBE implementation Software revision = 0x0100
  UINT32  OemVendorNamePtr;   // VbeFarPtr to Vendor Name String=9c143->Intel Corporation
  UINT32  OemProductNamePtr;  // VbeFarPtr to Product Name String=9c155->
  UINT32  OemProductRevPtr;   // VbeFarPtr to Product Revision String=9c189->0.0
  UINT8   Reserved[222];      // Reserved for VBE implementation scratch area
  UINT8   OemData[256];       // Data area for OEM strings.  Pad to 512 byte block size
} VESA_BIOS_EXTENSIONS_INFORMATION_BLOCK;
//A sample at 0x9c000
/*
0x0000:  56 45 53 41 00 03 00 c1 00 90 01 00 00 00 40 c0    VESA............
0x0010:  00 90 7b 00 00 01 43 c1 00 90 55 c1 00 90 89 c1    ......C...U.....
0x0020:  00 90 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
0x0030:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
0x0040:  60 01 61 01 62 01 63 01 64 01 65 01 66 01 67 01    ..a.b.c.d.e.f.g.
0x0050:  68 01 69 01 6a 01 6b 01 6c 01 6d 01 6e 01 6f 01    h.i.j.k.l.m.n.o.
0x0060:  70 01 71 01 3c 01 4d 01 5c 01 3a 01 4b 01 5a 01    p.q...M.....K.Z.
0x0070:  07 01 1a 01 1b 01 05 01 17 01 18 01 12 01 14 01    ................
0x0080:  15 01 01 01 03 01 11 01 ff ff 00 00 00 00 00 00    ................
0x0090:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
0x00A0:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
0x00B0:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
0x00C0:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
0x00D0:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
0x00E0:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
0x00F0:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
0x0100:  49 6e 74 65 6c 28 72 29 20 38 32 39 34 35 47 4d    Intel.r..82945GM
0x0110:  20 43 68 69 70 73 65 74 20 46 61 6d 69 6c 79 20    .Chipset.Family.
0x0120:  47 72 61 70 68 69 63 73 20 43 68 69 70 20 41 63    Graphics.Chip.Ac
0x0130:  63 65 6c 65 72 61 74 65 64 20 56 47 41 20 42 49    celerated.VGA.BI
0x0140:  4f 53 00 49 6e 74 65 6c 20 43 6f 72 70 6f 72 61    OS.Intel.Corpora
0x0150:  74 69 6f 6e 00 49 6e 74 65 6c 28 72 29 20 38 32    tion.Intel.r..82
0x0160:  39 34 35 47 4d 20 43 68 69 70 73 65 74 20 46 61    945GM.Chipset.Fa
0x0170:  6d 69 6c 79 20 47 72 61 70 68 69 63 73 20 43 6f    mily.Graphics.Co
0x0180:  6e 74 72 6f 6c 6c 65 72 00 48 61 72 64 77 61 72    ntroller.Hardwar
0x0190:  65 20 56 65 72 73 69 6f 6e 20 30 2e 30 00 00 00    e.Version.0.0...
0x01A0:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
0x01B0:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
0x01C0:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
0x01D0:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
0x01E0:  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
0x01F0:  7c bb b3 34 0a bd b3 34 30 01 90 04 3c 00 00 00    ...4...40.......
*/

//
// Super VGA Information Block VESASignature values
//
#define VESA_BIOS_EXTENSIONS_VESA_SIGNATURE SIGNATURE_32 ('V', 'E', 'S', 'A')
#define VESA_BIOS_EXTENSIONS_VBE2_SIGNATURE SIGNATURE_32 ('V', 'B', 'E', '2')

//
// Super VGA Information Block VESAVersion values
//
#define VESA_BIOS_EXTENSIONS_VERSION_1_2  0x0102
#define VESA_BIOS_EXTENSIONS_VERSION_2_0  0x0200
#define VESA_BIOS_EXTENSIONS_VERSION_3_0  0x0300

//
// Super VGA Information Block Capabilities field bit defintions
//
#define VESA_BIOS_EXTENSIONS_CAPABILITY_8_BIT_DAC 0x01  // 0: DAC width is fixed at 6 bits/color
// 1: DAC width switchable to 8 bits/color
//
#define VESA_BIOS_EXTENSIONS_CAPABILITY_NOT_VGA 0x02  // 0: Controller is VGA compatible
// 1: Controller is not VGA compatible
//
#define VESA_BIOS_EXTENSIONS_CAPABILITY_NOT_NORMAL_RAMDAC 0x04  // 0: Normal RAMDAC operation
// 1: Use blank bit in function 9 to program RAMDAC
//
#define VESA_BIOS_EXTENSIONS_CAPABILITY_STEREOSCOPIC  0x08  // 0: No hardware stereoscopic signal support
// 1: Hardware stereoscopic signal support
//
#define VESA_BIOS_EXTENSIONS_CAPABILITY_VESA_EVC  0x10  // 0: Stero signaling supported via external VESA stereo connector
// 1: Stero signaling supported via VESA EVC connector
//
// Super VGA mode number bite field definitions
//
#define VESA_BIOS_EXTENSIONS_MODE_NUMBER_VESA 0x0100  // 0: Not a VESA defined VBE mode
// 1: A VESA defined VBE mode
//
#define VESA_BIOS_EXTENSIONS_MODE_NUMBER_REFRESH_CONTROL_USER 0x0800  // 0: Use current BIOS default referesh rate
// 1: Use the user specified CRTC values for refresh rate
//
#define VESA_BIOS_EXTENSIONS_MODE_NUMBER_LINEAR_FRAME_BUFFER  0x4000  // 0: Use a banked/windowed frame buffer
// 1: Use a linear/flat frame buffer
//
#define VESA_BIOS_EXTENSIONS_MODE_NUMBER_PRESERVE_MEMORY  0x8000  // 0: Clear display memory
// 1: Preseve display memory
//
// Super VGA Information Block mode list terminator value
//
#define VESA_BIOS_EXTENSIONS_END_OF_MODE_LIST 0xffff

//
// Window Function
//
typedef
VOID
(*VESA_BIOS_EXTENSIONS_WINDOW_FUNCTION) (
  VOID
  );

//
// Super VGA Mode Information Block
//
typedef struct {
  //
  // Manadory fields for all VESA Bios Extensions revisions
  //
  UINT16                                ModeAttributes;   // Mode attributes
  UINT8                                 WinAAttributes;   // Window A attributes
  UINT8                                 WinBAttributes;   // Window B attributes
  UINT16                                WinGranularity;   // Window granularity in k
  UINT16                                WinSize;          // Window size in k
  UINT16                                WinASegment;      // Window A segment
  UINT16                                WinBSegment;      // Window B segment
  UINT32                                WindowFunction;   // Pointer to window function
  UINT16                                BytesPerScanLine; // Bytes per scanline
  //
  // Manadory fields for VESA Bios Extensions 1.2 and above
  //
  UINT16                                XResolution;          // Horizontal resolution
  UINT16                                YResolution;          // Vertical resolution
  UINT8                                 XCharSize;            // Character cell width
  UINT8                                 YCharSize;            // Character cell height
  UINT8                                 NumberOfPlanes;       // Number of memory planes
  UINT8                                 BitsPerPixel;         // Bits per pixel
  UINT8                                 NumberOfBanks;        // Number of CGA style banks
  UINT8                                 MemoryModel;          // Memory model type
  UINT8                                 BankSize;             // Size of CGA style banks
  UINT8                                 NumberOfImagePages;   // Number of images pages
  UINT8                                 Reserved1;            // Reserved
  UINT8                                 RedMaskSize;          // Size of direct color red mask
  UINT8                                 RedFieldPosition;     // Bit posn of lsb of red mask
  UINT8                                 GreenMaskSize;        // Size of direct color green mask
  UINT8                                 GreenFieldPosition;   // Bit posn of lsb of green mask
  UINT8                                 BlueMaskSize;         // Size of direct color blue mask
  UINT8                                 BlueFieldPosition;    // Bit posn of lsb of blue mask
  UINT8                                 RsvdMaskSize;         // Size of direct color res mask
  UINT8                                 RsvdFieldPosition;    // Bit posn of lsb of res mask
  UINT8                                 DirectColorModeInfo;  // Direct color mode attributes
  //
  // Manadory fields for VESA Bios Extensions 2.0 and above
  //
  UINT32                                PhysBasePtr;  // Physical Address for flat memory frame buffer
  UINT32                                Reserved2;    // Reserved
  UINT16                                Reserved3;    // Reserved
  //
  // Manadory fields for VESA Bios Extensions 3.0 and above
  //
  UINT16                                LinBytesPerScanLine;    // Bytes/scan line for linear modes
  UINT8                                 BnkNumberOfImagePages;  // Number of images for banked modes
  UINT8                                 LinNumberOfImagePages;  // Number of images for linear modes
  UINT8                                 LinRedMaskSize;         // Size of direct color red mask (linear mode)
  UINT8                                 LinRedFieldPosition;    // Bit posiiton of lsb of red mask (linear modes)
  UINT8                                 LinGreenMaskSize;       // Size of direct color green mask (linear mode)
  UINT8                                 LinGreenFieldPosition;  // Bit posiiton of lsb of green mask (linear modes)
  UINT8                                 LinBlueMaskSize;        // Size of direct color blue mask (linear mode)
  UINT8                                 LinBlueFieldPosition;   // Bit posiiton of lsb of blue mask (linear modes)
  UINT8                                 LinRsvdMaskSize;        // Size of direct color reserved mask (linear mode)
  UINT8                                 LinRsvdFieldPosition;   // Bit posiiton of lsb of reserved mask (linear modes)
  UINT32                                MaxPixelClock;          // Maximum pixel clock (in Hz) for graphics mode
  UINT8                                 Pad[190];               // Pad to 256 byte block size
} VESA_BIOS_EXTENSIONS_MODE_INFORMATION_BLOCK;

//
// Super VGA Mode Information Block ModeAttributes field bit defintions
//
#define VESA_BIOS_EXTENSIONS_MODE_ATTRIBUTE_HARDWARE  0x0001  // 0: Mode not supported in handware
// 1: Mode supported in handware
//
#define VESA_BIOS_EXTENSIONS_MODE_ATTRIBUTE_TTY 0x0004  // 0: TTY Output functions not supported by BIOS
// 1: TTY Output functions supported by BIOS
//
#define VESA_BIOS_EXTENSIONS_MODE_ATTRIBUTE_COLOR 0x0008  // 0: Monochrome mode
// 1: Color mode
//
#define VESA_BIOS_EXTENSIONS_MODE_ATTRIBUTE_GRAPHICS  0x0010  // 0: Text mode
// 1: Graphics mode
//
#define VESA_BIOS_EXTENSIONS_MODE_ATTRIBUTE_NOT_VGA 0x0020  // 0: VGA compatible mode
// 1: Not a VGA compatible mode
//
#define VESA_BIOS_EXTENSIONS_MODE_ATTRIBUTE_NOT_WINDOWED  0x0040  // 0: VGA compatible windowed memory mode
// 1: Not a VGA compatible windowed memory mode
//
#define VESA_BIOS_EXTENSIONS_MODE_ATTRIBUTE_LINEAR_FRAME_BUFFER 0x0080  // 0: No linear fram buffer mode available
// 1: Linear frame buffer mode available
//
#define VESA_BIOS_EXTENSIONS_MODE_ATTRIBUTE_DOUBLE_SCAN 0x0100  // 0: No double scan mode available
// 1: Double scan mode available
//
#define VESA_BIOS_EXTENSIONS_MODE_ATTRIBUTE_INTERLACED  0x0200  // 0: No interlaced mode is available
// 1: Interlaced mode is available
//
#define VESA_BIOS_EXTENSIONS_MODE_ATTRIBUTE_NO_TRIPPLE_BUFFER 0x0400  // 0: No hardware triple buffer mode support available
// 1: Hardware triple buffer mode support available
//
#define VESA_BIOS_EXTENSIONS_MODE_ATTRIBUTE_STEREOSCOPIC  0x0800  // 0: No hardware steroscopic display support
// 1: Hardware steroscopic display support
//
#define VESA_BIOS_EXTENSIONS_MODE_ATTRIBUTE_DUAL_DISPLAY  0x1000  // 0: No dual display start address support
// 1: Dual display start address support
//
// Super VGA Mode Information Block WinAAttribite/WinBAttributes field bit defintions
//
#define VESA_BIOS_EXTENSIONS_WINX_ATTRIBUTE_RELOCATABLE 0x01  // 0: Single non-relocatable window only
// 1: Relocatable window(s) are supported
//
#define VESA_BIOS_EXTENSIONS_WINX_ATTRIBUTE_READABLE  0x02  // 0: Window is not readable
// 1: Window is readable
//
#define VESA_BIOS_EXTENSIONS_WINX_ATTRIBUTE_WRITABLE  0x04  // 0: Window is not writable
// 1: Window is writable
//
// Super VGA Mode Information Block DirectColorMode field bit defintions
//
#define VESA_BIOS_EXTENSIONS_DIRECT_COLOR_MODE_PROG_COLOR_RAMP  0x01  // 0: Color ram is fixed
// 1: Color ramp is programmable
//
#define VESA_BIOS_EXTENSIONS_DIRECT_COLOR_MODE_RSVD_USABLE  0x02  // 0: Bits in Rsvd field are reserved
// 1: Bits in Rsdv field are usable
//
// Super VGA Memory Models
//
typedef enum {
  memPL = 3,  // Planar memory model
  memPK = 4,  // Packed pixel memory model
  memRGB= 6,  // Direct color RGB memory model
  memYUV= 7   // Direct color YUV memory model
} VESA_BIOS_EXTENSIONS_MEMORY_MODELS;

//
// Super VGA CRTC Information Block
//
typedef struct {
  UINT16  HorizontalTotal;      // Horizontal total in pixels
  UINT16  HorizontalSyncStart;  // Horizontal sync start in pixels
  UINT16  HorizontalSyncEnd;    // Horizontal sync end in pixels
  UINT16  VericalTotal;         // Vertical total in pixels
  UINT16  VericalSyncStart;     // Vertical sync start in pixels
  UINT16  VericalSyncEnd;       // Vertical sync end in pixels
  UINT8   Flags;                // Flags (Interlaced/DoubleScan/etc).
  UINT32  PixelClock;           // Pixel clock in units of Hz
  UINT16  RefreshRate;          // Refresh rate in units of 0.01 Hz
  UINT8   Reserved[40];         // Pad
} VESA_BIOS_EXTENSIONS_CRTC_INFORMATION_BLOCK;

#define VESA_BIOS_EXTENSIONS_CRTC_FLAGS_DOUBLE_SCAN 0x01  // 0: Graphics mode is not souble scanned
// 1: Graphics mode is double scanned
//
#define VESA_BIOS_EXTENSIONS_CRTC_FLAGSINTERLACED 0x02  // 0: Graphics mode is not interlaced
// 1: Graphics mode is interlaced
//
#define VESA_BIOS_EXTENSIONS_CRTC_HORIZONTAL_SYNC_NEGATIVE  0x04  // 0: Horizontal sync polarity is positive(+)
// 0: Horizontal sync polarity is negative(-)
//
#define VESA_BIOS_EXTENSIONS_CRTC_VERITICAL_SYNC_NEGATIVE 0x08  // 0: Verical sync polarity is positive(+)
// 0: Verical sync polarity is negative(-)
//
// Turn off byte packing of data structures
//
#pragma pack()

#endif
