subsystems/mvdm/ntvdm/bios/vidbios.h

   1 /*
   2  * COPYRIGHT:       GPL - See COPYING in the top level directory
   3  * PROJECT:         ReactOS Virtual DOS Machine
   4  * FILE:            subsystems/mvdm/ntvdm/bios/vidbios.h
   5  * PURPOSE:         VDM 32-bit Video BIOS Support Library
   6  * PROGRAMMERS:     Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
   7  *                  Hermes Belusca-Maito (hermes.belusca@sfr.fr)
   8  */
   9
  10 #ifndef _VIDBIOS_H_
  11 #define _VIDBIOS_H_
  12
  13 /* DEFINES ********************************************************************/
  14
  15 #define BIOS_VIDEO_INTERRUPT    0x10
  16
  17 #define CONSOLE_FONT_HEIGHT     8
  18 #define BIOS_DEFAULT_VIDEO_MODE 0x03
  19 #define BIOS_MAX_PAGES          8
  20 #define BIOS_MAX_VIDEO_MODE     0x13
  21 #define DEFAULT_ATTRIBUTE       0x07
  22
  23 #define GRAPHICS_VIDEO_SEG      0xA000
  24 #define TEXT_VIDEO_SEG          0xB800
  25 #define CGA_EVEN_VIDEO_SEG      0xB800
  26 #define CGA_ODD_VIDEO_SEG       0xBA00
  27 #define VIDEO_BIOS_DATA_SEG     0xC000
  28
  29 #define FONT_8x8_OFFSET         0x0100
  30 #define FONT_8x8_HIGH_OFFSET    0x0500
  31 #define FONT_8x16_OFFSET        0x0900
  32 #define FONT_8x14_OFFSET        0x1900
  33
  34 #define FONT_8x8_COMPAT_OFFSET  0xFA6E
  35
  36 #define VIDEO_STATE_INFO_OFFSET 0x3000 // == 0x1900 + (sizeof(Font8x14) == 0x0E00) + 0x0900 for padding
  37
  38 #define VIDEO_BIOS_ROM_SIZE     0x4000
  39
  40 typedef enum
  41 {
  42     SCROLL_UP,
  43     SCROLL_DOWN,
  44     SCROLL_LEFT,
  45     SCROLL_RIGHT
  46 } SCROLL_DIRECTION;
  47
  48 #pragma pack(push, 1)
  49
  50 typedef struct _VGA_STATIC_FUNC_TABLE
  51 {
  52     BYTE SupportedModes[3];                     // 0x00
  53     DWORD Reserved0;                            // 0x03
  54     BYTE SupportedScanlines;                    // 0x07
  55     BYTE TextCharBlocksNumber;                  // 0x08
  56     BYTE MaxActiveTextCharBlocksNumber;         // 0x09
  57     WORD VGAFuncSupportFlags;                   // 0x0a
  58     WORD Reserved1;                             // 0x0c
  59     BYTE VGASavePtrFuncFlags;                   // 0x0e
  60     BYTE Reserved2;                             // 0x0f
  61 } VGA_STATIC_FUNC_TABLE, *PVGA_STATIC_FUNC_TABLE;
  62
  63 typedef struct _VGA_DYNAMIC_FUNC_TABLE
  64 {
  65     DWORD StaticFuncTablePtr;                   // 0x00
  66
  67     /*
  68      * The following fields follow the same order as in the BDA,
  69      * from offset 0x49 up to offset 0x66...
  70      */
  71     BYTE VideoMode;                             // 0x04
  72     WORD ScreenColumns;                         // 0x05
  73     WORD VideoPageSize;                         // 0x07
  74     WORD VideoPageOffset;                       // 0x09
  75     WORD CursorPosition[BIOS_MAX_PAGES];        // 0x0b
  76     BYTE CursorEndLine;                         // 0x1b
  77     BYTE CursorStartLine;                       // 0x1c
  78     BYTE VideoPage;                             // 0x1d
  79     WORD CrtBasePort;                           // 0x1e
  80     BYTE CrtModeControl;                        // 0x20
  81     BYTE CrtColorPaletteMask;                   // 0x21
  82     /* ... and offsets 0x84 and 0x85. */
  83     BYTE ScreenRows;                            // 0x22
  84     WORD CharacterHeight;                       // 0x23
  85
  86     BYTE VGADccIDActive;                        // 0x25
  87     BYTE VGADccIDAlternate;                     // 0x26
  88     WORD CurrModeSupportedColorsNum;            // 0x27
  89     BYTE CurrModeSupportedPagesNum;             // 0x29
  90     BYTE Scanlines;                             // 0x2a
  91     BYTE PrimaryCharTable;                      // 0x2b
  92     BYTE SecondaryCharTable;                    // 0x2c
  93
  94     /* Contains part of information from BDA::VGAFlags (offset 0x89) */
  95     BYTE VGAFlags;                              // 0x2d
  96
  97     BYTE Reserved0[3];                          // 0x2e
  98     BYTE VGAAvailMemory;                        // 0x31
  99     BYTE VGASavePtrStateFlags;                  // 0x32
 100     BYTE VGADispInfo;                           // 0x33
 101
 102     BYTE Reserved1[12];                         // 0x34 - 0x40
 103 } VGA_DYNAMIC_FUNC_TABLE, *PVGA_DYNAMIC_FUNC_TABLE;
 104
 105 #pragma pack(pop)
 106
 107 /* MACROS *********************************************************************/
 108
 109 //
 110 // These macros are defined for ease-of-use of some VGA I/O ports
 111 // whose addresses depend whether we are in Monochrome or Colour mode.
 112 //
 113 #define VGA_INSTAT1_READ    Bda->CrtBasePort + 6    // VGA_INSTAT1_READ_MONO or VGA_INSTAT1_READ_COLOR
 114 #define VGA_CRTC_INDEX      Bda->CrtBasePort        // VGA_CRTC_INDEX_MONO   or VGA_CRTC_INDEX_COLOR
 115 #define VGA_CRTC_DATA       Bda->CrtBasePort + 1    // VGA_CRTC_DATA_MONO    or VGA_CRTC_DATA_COLOR
 116
 117 /* FUNCTIONS ******************************************************************/
 118
 119 VOID WINAPI VidBiosVideoService(LPWORD Stack);
 120
 121 VOID VidBiosDetachFromConsole(VOID);
 122 VOID VidBiosAttachToConsole(VOID);
 123
 124 VOID VidBiosPost(VOID);
 125 BOOLEAN VidBiosInitialize(VOID);
 126 VOID VidBiosCleanup(VOID);
 127
 128 #endif /* _VIDBIOS_H_ */