mirror of
https://github.com/reactos/reactos.git
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129 lines
4.6 KiB
C
129 lines
4.6 KiB
C
/*
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* COPYRIGHT: GPL - See COPYING in the top level directory
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* PROJECT: ReactOS Virtual DOS Machine
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* FILE: subsystems/mvdm/ntvdm/bios/vidbios.h
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* PURPOSE: VDM 32-bit Video BIOS Support Library
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* PROGRAMMERS: Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
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* Hermes Belusca-Maito (hermes.belusca@sfr.fr)
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*/
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#ifndef _VIDBIOS_H_
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#define _VIDBIOS_H_
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/* DEFINES ********************************************************************/
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#define BIOS_VIDEO_INTERRUPT 0x10
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#define CONSOLE_FONT_HEIGHT 8
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#define BIOS_DEFAULT_VIDEO_MODE 0x03
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#define BIOS_MAX_PAGES 8
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#define BIOS_MAX_VIDEO_MODE 0x13
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#define DEFAULT_ATTRIBUTE 0x07
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#define GRAPHICS_VIDEO_SEG 0xA000
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#define TEXT_VIDEO_SEG 0xB800
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#define CGA_EVEN_VIDEO_SEG 0xB800
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#define CGA_ODD_VIDEO_SEG 0xBA00
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#define VIDEO_BIOS_DATA_SEG 0xC000
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#define FONT_8x8_OFFSET 0x0100
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#define FONT_8x8_HIGH_OFFSET 0x0500
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#define FONT_8x16_OFFSET 0x0900
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#define FONT_8x14_OFFSET 0x1900
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#define FONT_8x8_COMPAT_OFFSET 0xFA6E
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#define VIDEO_STATE_INFO_OFFSET 0x3000 // == 0x1900 + (sizeof(Font8x14) == 0x0E00) + 0x0900 for padding
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#define VIDEO_BIOS_ROM_SIZE 0x4000
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typedef enum
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{
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SCROLL_UP,
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SCROLL_DOWN,
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SCROLL_LEFT,
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SCROLL_RIGHT
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} SCROLL_DIRECTION;
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#pragma pack(push, 1)
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typedef struct _VGA_STATIC_FUNC_TABLE
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{
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BYTE SupportedModes[3]; // 0x00
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DWORD Reserved0; // 0x03
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BYTE SupportedScanlines; // 0x07
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BYTE TextCharBlocksNumber; // 0x08
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BYTE MaxActiveTextCharBlocksNumber; // 0x09
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WORD VGAFuncSupportFlags; // 0x0a
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WORD Reserved1; // 0x0c
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BYTE VGASavePtrFuncFlags; // 0x0e
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BYTE Reserved2; // 0x0f
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} VGA_STATIC_FUNC_TABLE, *PVGA_STATIC_FUNC_TABLE;
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typedef struct _VGA_DYNAMIC_FUNC_TABLE
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{
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DWORD StaticFuncTablePtr; // 0x00
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/*
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* The following fields follow the same order as in the BDA,
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* from offset 0x49 up to offset 0x66...
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*/
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BYTE VideoMode; // 0x04
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WORD ScreenColumns; // 0x05
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WORD VideoPageSize; // 0x07
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WORD VideoPageOffset; // 0x09
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WORD CursorPosition[BIOS_MAX_PAGES]; // 0x0b
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BYTE CursorEndLine; // 0x1b
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BYTE CursorStartLine; // 0x1c
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BYTE VideoPage; // 0x1d
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WORD CrtBasePort; // 0x1e
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BYTE CrtModeControl; // 0x20
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BYTE CrtColorPaletteMask; // 0x21
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/* ... and offsets 0x84 and 0x85. */
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BYTE ScreenRows; // 0x22
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WORD CharacterHeight; // 0x23
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BYTE VGADccIDActive; // 0x25
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BYTE VGADccIDAlternate; // 0x26
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WORD CurrModeSupportedColorsNum; // 0x27
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BYTE CurrModeSupportedPagesNum; // 0x29
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BYTE Scanlines; // 0x2a
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BYTE PrimaryCharTable; // 0x2b
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BYTE SecondaryCharTable; // 0x2c
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/* Contains part of information from BDA::VGAFlags (offset 0x89) */
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BYTE VGAFlags; // 0x2d
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BYTE Reserved0[3]; // 0x2e
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BYTE VGAAvailMemory; // 0x31
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BYTE VGASavePtrStateFlags; // 0x32
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BYTE VGADispInfo; // 0x33
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BYTE Reserved1[12]; // 0x34 - 0x40
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} VGA_DYNAMIC_FUNC_TABLE, *PVGA_DYNAMIC_FUNC_TABLE;
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#pragma pack(pop)
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/* MACROS *********************************************************************/
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//
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// These macros are defined for ease-of-use of some VGA I/O ports
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// whose addresses depend whether we are in Monochrome or Colour mode.
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//
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#define VGA_INSTAT1_READ Bda->CrtBasePort + 6 // VGA_INSTAT1_READ_MONO or VGA_INSTAT1_READ_COLOR
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#define VGA_CRTC_INDEX Bda->CrtBasePort // VGA_CRTC_INDEX_MONO or VGA_CRTC_INDEX_COLOR
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#define VGA_CRTC_DATA Bda->CrtBasePort + 1 // VGA_CRTC_DATA_MONO or VGA_CRTC_DATA_COLOR
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/* FUNCTIONS ******************************************************************/
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VOID WINAPI VidBiosVideoService(LPWORD Stack);
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VOID VidBiosDetachFromConsole(VOID);
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VOID VidBiosAttachToConsole(VOID);
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VOID VidBiosPost(VOID);
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BOOLEAN VidBiosInitialize(VOID);
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VOID VidBiosCleanup(VOID);
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#endif /* _VIDBIOS_H_ */
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