pcvideo.c File Reference

#include <freeldr.h>
#include <suppress.h>
#include <debug.h>
#include <pshpack2.h>
#include <poppack.h>

Include dependency graph for pcvideo.c:

Go to the source code of this file.

Classes
struct	SVGA_MODE_INFORMATION

Macros
#define	VIDEOPORT_PALETTE_READ   0x03C7
#define	VIDEOPORT_PALETTE_WRITE   0x03C8
#define	VIDEOPORT_PALETTE_DATA   0x03C9
#define	VIDEOPORT_VERTICAL_RETRACE   0x03DA
#define	VIDEOVGA_MEM_ADDRESS   0xA0000
#define	VIDEOTEXT_MEM_ADDRESS   0xB8000
#define	VIDEOTEXT_MEM_SIZE   0x8000
#define	VIDEOCARD_CGA_OR_OTHER   0
#define	VIDEOCARD_EGA   1
#define	VIDEOCARD_VGA   2
#define	VIDEOMODE_NORMAL_TEXT   0
#define	VIDEOMODE_EXTENDED_TEXT   1
#define	VIDEOMODE_80X28   0x501C
#define	VIDEOMODE_80X30   0x501E
#define	VIDEOMODE_80X34   0x5022
#define	VIDEOMODE_80X43   0x502B
#define	VIDEOMODE_80X60   0x503C
#define	VIDEOMODE_132X25   0x8419
#define	VIDEOMODE_132X43   0x842B
#define	VIDEOMODE_132X50   0x8432
#define	VIDEOMODE_132X60   0x843C
#define	VERTRES_200_SCANLINES   0x00
#define	VERTRES_350_SCANLINES   0x01
#define	VERTRES_400_SCANLINES   0x02
#define	TRACE_printf(Format, ...)

Typedefs
typedef struct SVGA_MODE_INFORMATION *	PSVGA_MODE_INFORMATION

Enumerations
enum	{   INT1FhFont = 0x00 , INT43hFont = 0x01 , ROM_8x14CharacterFont = 0x02 , ROM_8x8DoubleDotFontLo = 0x03 ,   ROM_8x8DoubleDotFontHi = 0x04 , ROM_AlphaAlternate = 0x05 , ROM_8x16Font = 0x06 , ROM_Alternate9x16Font = 0x07 ,   UltraVision_8x20Font = 0x11 , UltraVision_8x10Font = 0x12 }

Functions
	DBG_DEFAULT_CHANNEL (UI)
	C_ASSERT (sizeof(SVGA_MODE_INFORMATION)==256)
static ULONG	PcVideoDetectVideoCard (VOID)
static BOOLEAN	PcVideoVesaGetSVGAModeInformation (_In_ USHORT Mode, _Out_ PSVGA_MODE_INFORMATION ModeInformation)
static BOOLEAN	PcVideoVesaGetCurrentSVGAMode (_Out_ PUSHORT Mode)
static BOOLEAN	PcVideoGetBiosMode (_Out_ PUSHORT Mode)
static VOID	PcVideoGetDisplayMode (VOID)
static BOOLEAN	PcVideoSetBiosVesaMode (USHORT Mode)
static VOID	PcVideoSetBiosMode (UCHAR VideoMode)
static VOID	PcVideoSetFont8x8 (VOID)
static VOID	PcVideoSetFont8x14 (VOID)
static VOID	PcVideoSelectAlternatePrintScreen (VOID)
static VOID	PcVideoDisableCursorEmulation (VOID)
static VOID	PcVideoDefineCursor (UCHAR StartScanLine, UCHAR EndScanLine)
static VOID	PcVideoSetVerticalResolution (UCHAR VerticalResolutionMode)
static VOID	PcVideoSet480ScanLines (VOID)
static VOID	PcVideoSetDisplayEnd (VOID)
static BOOLEAN	PcVideoSetMode80x25 (VOID)
static BOOLEAN	PcVideoSetMode80x50_80x43 (VOID)
static BOOLEAN	PcVideoSetMode80x28 (VOID)
static BOOLEAN	PcVideoSetMode80x30 (VOID)
static BOOLEAN	PcVideoSetMode80x34 (VOID)
static BOOLEAN	PcVideoSetMode80x43 (VOID)
static BOOLEAN	PcVideoSetMode80x60 (VOID)
static BOOLEAN	PcVideoSetMode (USHORT NewMode)
static VOID	PcVideoSetBlinkBit (BOOLEAN Enable)
static VOID	PcVideoSetMemoryBank (USHORT BankNumber)
VOID	PcVideoInit (VOID)
VIDEODISPLAYMODE	PcVideoSetDisplayMode (PCSTR DisplayModeName, BOOLEAN Init)
VOID	PcVideoGetDisplaySize (PULONG Width, PULONG Height, PULONG Depth)
ULONG	PcVideoGetBufferSize (VOID)
VOID	PcVideoGetFontsFromFirmware (PULONG RomFontPointers)
VOID	PcVideoSetTextCursorPosition (UCHAR X, UCHAR Y)
VOID	PcVideoHideShowTextCursor (BOOLEAN Show)
VOID	PcVideoCopyOffScreenBufferToVRAM (PVOID Buffer)
VOID	PcVideoClearScreen (UCHAR Attr)
VOID	PcVideoPutChar (int Ch, UCHAR Attr, unsigned X, unsigned Y)
BOOLEAN	PcVideoIsPaletteFixed (VOID)
VOID	PcVideoSetPaletteColor (UCHAR Color, UCHAR Red, UCHAR Green, UCHAR Blue)
VOID	PcVideoGetPaletteColor (UCHAR Color, UCHAR *Red, UCHAR *Green, UCHAR *Blue)
VOID	PcVideoSync (VOID)
VOID	PcVideoPrepareForReactOS (VOID)

Variables
UCHAR	MachDefaultTextColor = COLOR_GRAY
static ULONG	VideoCard = VIDEOCARD_CGA_OR_OTHER
static USHORT	BiosVideoMode = VIDEOMODE_NORMAL_TEXT
static ULONG	ScreenWidth = 80
static ULONG	ScreenHeight = 25
static ULONG	BytesPerScanLine = 160
static VIDEODISPLAYMODE	DisplayMode = VideoTextMode
static BOOLEAN	VesaVideoMode = FALSE
static SVGA_MODE_INFORMATION	VesaVideoModeInformation
static ULONG	CurrentMemoryBank = 0

Macro Definition Documentation

TRACE_printf

#define TRACE_printf	(		Format,
			...
	)

Value:

do { \
    TRACE(Format, ##__VA_ARGS__); \
    printf(Format, ##__VA_ARGS__); \
} while (0)

Definition at line 1038 of file pcvideo.c.

VERTRES_200_SCANLINES

#define VERTRES_200_SCANLINES   0x00

Definition at line 50 of file pcvideo.c.

VERTRES_350_SCANLINES

#define VERTRES_350_SCANLINES   0x01

Definition at line 51 of file pcvideo.c.

VERTRES_400_SCANLINES

#define VERTRES_400_SCANLINES   0x02

Definition at line 52 of file pcvideo.c.

VIDEOCARD_CGA_OR_OTHER

#define VIDEOCARD_CGA_OR_OTHER   0

Definition at line 34 of file pcvideo.c.

VIDEOCARD_EGA

#define VIDEOCARD_EGA   1

Definition at line 35 of file pcvideo.c.

VIDEOCARD_VGA

#define VIDEOCARD_VGA   2

Definition at line 36 of file pcvideo.c.

VIDEOMODE_132X25

#define VIDEOMODE_132X25   0x8419

Definition at line 45 of file pcvideo.c.

VIDEOMODE_132X43

#define VIDEOMODE_132X43   0x842B

Definition at line 46 of file pcvideo.c.

VIDEOMODE_132X50

#define VIDEOMODE_132X50   0x8432

Definition at line 47 of file pcvideo.c.

VIDEOMODE_132X60

#define VIDEOMODE_132X60   0x843C

Definition at line 48 of file pcvideo.c.

VIDEOMODE_80X28

#define VIDEOMODE_80X28   0x501C

Definition at line 40 of file pcvideo.c.

VIDEOMODE_80X30

#define VIDEOMODE_80X30   0x501E

Definition at line 41 of file pcvideo.c.

VIDEOMODE_80X34

#define VIDEOMODE_80X34   0x5022

Definition at line 42 of file pcvideo.c.

VIDEOMODE_80X43

#define VIDEOMODE_80X43   0x502B

Definition at line 43 of file pcvideo.c.

VIDEOMODE_80X60

#define VIDEOMODE_80X60   0x503C

Definition at line 44 of file pcvideo.c.

VIDEOMODE_EXTENDED_TEXT

#define VIDEOMODE_EXTENDED_TEXT   1

Definition at line 39 of file pcvideo.c.

VIDEOMODE_NORMAL_TEXT

#define VIDEOMODE_NORMAL_TEXT   0

Definition at line 38 of file pcvideo.c.

VIDEOPORT_PALETTE_DATA

#define VIDEOPORT_PALETTE_DATA   0x03C9

Definition at line 27 of file pcvideo.c.

VIDEOPORT_PALETTE_READ

#define VIDEOPORT_PALETTE_READ   0x03C7

Definition at line 25 of file pcvideo.c.

VIDEOPORT_PALETTE_WRITE

#define VIDEOPORT_PALETTE_WRITE   0x03C8

Definition at line 26 of file pcvideo.c.

VIDEOPORT_VERTICAL_RETRACE

#define VIDEOPORT_VERTICAL_RETRACE   0x03DA

Definition at line 28 of file pcvideo.c.

VIDEOTEXT_MEM_ADDRESS

#define VIDEOTEXT_MEM_ADDRESS   0xB8000

Definition at line 31 of file pcvideo.c.

VIDEOTEXT_MEM_SIZE

#define VIDEOTEXT_MEM_SIZE   0x8000

Definition at line 32 of file pcvideo.c.

VIDEOVGA_MEM_ADDRESS

#define VIDEOVGA_MEM_ADDRESS   0xA0000

Definition at line 30 of file pcvideo.c.

Typedef Documentation

PSVGA_MODE_INFORMATION

typedef struct SVGA_MODE_INFORMATION * PSVGA_MODE_INFORMATION

Enumeration Type Documentation

anonymous enum

anonymous enum

Enumerator
INT1FhFont
INT43hFont
ROM_8x14CharacterFont
ROM_8x8DoubleDotFontLo
ROM_8x8DoubleDotFontHi
ROM_AlphaAlternate
ROM_8x16Font
ROM_Alternate9x16Font
UltraVision_8x20Font
UltraVision_8x10Font

Definition at line 124 of file pcvideo.c.

{
    INT1FhFont = 0x00,
    INT43hFont = 0x01,
    ROM_8x14CharacterFont = 0x02,
    ROM_8x8DoubleDotFontLo = 0x03,
    ROM_8x8DoubleDotFontHi = 0x04,
    ROM_AlphaAlternate = 0x05,
    ROM_8x16Font = 0x06,
    ROM_Alternate9x16Font = 0x07,
    UltraVision_8x20Font = 0x11,
    UltraVision_8x10Font = 0x12,
};

Function Documentation

C_ASSERT()

C_ASSERT

(

sizeof(SVGA_MODE_INFORMATION)

= =256

)

DBG_DEFAULT_CHANNEL()

DBG_DEFAULT_CHANNEL

(

UI

)

PcVideoClearScreen()

VOID PcVideoClearScreen

(

UCHAR

Attr

)

Definition at line 1236 of file pcvideo.c.

{
    USHORT AttrChar;
    USHORT *BufPtr;
 
    AttrChar = ((USHORT)Attr << 8) | ' ';
    for (BufPtr = (USHORT*)VIDEOTEXT_MEM_ADDRESS;
         BufPtr < (USHORT*)(VIDEOTEXT_MEM_ADDRESS + VIDEOTEXT_MEM_SIZE);
         BufPtr++)
    {
        _PRAGMA_WARNING_SUPPRESS(__WARNING_DEREF_NULL_PTR)
        *BufPtr = AttrChar;
    }
}

Referenced by MachInit().

PcVideoCopyOffScreenBufferToVRAM()

VOID PcVideoCopyOffScreenBufferToVRAM

(

PVOID

Buffer

)

Definition at line 1195 of file pcvideo.c.

{
    USHORT BanksToCopy;
    ULONG BytesInLastBank;
    USHORT CurrentBank;
    ULONG BankSize;
 
    /* PcVideoWaitForVerticalRetrace(); */
 
    /* Text mode (BIOS or VESA) */
    if (VideoTextMode == DisplayMode)
    {
        RtlCopyMemory((PVOID)VIDEOTEXT_MEM_ADDRESS, Buffer, PcVideoGetBufferSize());
    }
    /* VESA graphics mode */
    else if (VideoGraphicsMode == DisplayMode && VesaVideoMode)
    {
        BankSize = VesaVideoModeInformation.WindowGranularity << 10;
        BanksToCopy = (USHORT)((VesaVideoModeInformation.HeightInPixels * VesaVideoModeInformation.BytesPerScanLine) / BankSize);
        BytesInLastBank = (VesaVideoModeInformation.HeightInPixels * VesaVideoModeInformation.BytesPerScanLine) % BankSize;
 
        /* Copy all the banks but the last one because
         * it is probably a partial bank */
        for (CurrentBank = 0; CurrentBank < BanksToCopy; CurrentBank++)
        {
            PcVideoSetMemoryBank(CurrentBank);
            RtlCopyMemory((PVOID)VIDEOVGA_MEM_ADDRESS, (char*)Buffer + CurrentBank * BankSize, BankSize);
        }
 
        /* Copy the remaining bytes into the last bank */
        PcVideoSetMemoryBank(CurrentBank);
        RtlCopyMemory((PVOID)VIDEOVGA_MEM_ADDRESS, (char*)Buffer + CurrentBank * BankSize, BytesInLastBank);
    }
    /* BIOS graphics mode */
    else
    {
        UNIMPLEMENTED;
    }
}

Referenced by MachInit().

PcVideoDefineCursor()

static VOID PcVideoDefineCursor ( UCHAR  StartScanLine, UCHAR  EndScanLine  )

static

Definition at line 638 of file pcvideo.c.

{
    REGS Regs;
 
    /* Int 10h AH=01h
     * VIDEO - SET TEXT-MODE CURSOR SHAPE
     *
     * AH = 01h
     * CH = cursor start and options
     * CL = bottom scan line containing cursor (bits 0-4)
     * Return:
     * Nothing
     *
     * Specify the starting and ending scan lines to be occupied
     * by the hardware cursor in text modes.
     *
     * AMI 386 BIOS and AST Premier 386 BIOS will lock up the
     * system if AL is not equal to the current video mode.
     *
     * Bitfields for cursor start and options:
     *
     * Bit(s)    Description
     * 7         should be zero
     * 6,5       cursor blink
     * (00=normal, 01=invisible, 10=erratic, 11=slow).
     * (00=normal, other=invisible on EGA/VGA)
     * 4-0       topmost scan line containing cursor
     */
    Regs.b.ah = 0x01;
    Regs.b.al = 0x03;
    Regs.b.ch = StartScanLine;
    Regs.b.cl = EndScanLine;
    Int386(0x10, &Regs, &Regs);
}

Referenced by PcVideoHideShowTextCursor(), PcVideoSetMode80x28(), PcVideoSetMode80x34(), PcVideoSetMode80x43(), PcVideoSetMode80x50_80x43(), and PcVideoSetMode80x60().

PcVideoDetectVideoCard()

static ULONG PcVideoDetectVideoCard ( VOID  )

static

Definition at line 139 of file pcvideo.c.

{
    REGS Regs;
 
    /* Int 10h AH=12h BL=10h
     * VIDEO - ALTERNATE FUNCTION SELECT (PS,EGA,VGA,MCGA) - GET EGA INFO
     *
     * AH = 12h
     * BL = 10h
     * Return:
     * BH = video state
     * 00h color mode in effect (I/O port 3Dxh)
     * 01h mono mode in effect (I/O port 3Bxh)
     * BL = installed memory (00h = 64K, 01h = 128K, 02h = 192K, 03h = 256K)
     * CH = feature connector bits
     * CL = switch settings
     * AH destroyed (at least by Tseng ET4000 BIOS v8.00n)
     *
     * Installation check;EGA
     */
    Regs.b.ah = 0x12;
    Regs.b.bl = 0x10;
    Int386(0x10, &Regs, &Regs);
 
    /* If BL is still equal to 0x10 then there is no EGA/VGA present */
    if (Regs.b.bl == 0x10)
        return VIDEOCARD_CGA_OR_OTHER;
 
    /* Int 10h AX=1A00h
     * VIDEO - GET DISPLAY COMBINATION CODE (PS,VGA/MCGA)
     *
     * AX = 1A00h
     * Return:
     * AL = 1Ah if function was supported
     * BL = active display code
     * BH = alternate display code
     *
     * This function is commonly used to check for the presence of a VGA.
     *
     * Installation check;VGA
     *
     * Values for display combination code:
     * 00h    no display
     * 01h    monochrome adapter w/ monochrome display
     * 02h    CGA w/ color display
     * 03h    reserved
     * 04h    EGA w/ color display
     * 05h    EGA w/ monochrome display
     * 06h    PGA w/ color display
     * 07h    VGA w/ monochrome analog display
     * 08h    VGA w/ color analog display
     * 09h    reserved
     * 0Ah    MCGA w/ digital color display
     * 0Bh    MCGA w/ monochrome analog display
     * 0Ch    MCGA w/ color analog display
     * FFh    unknown display type
     */
    Regs.w.ax = 0x1A00;
    Int386(0x10, &Regs, &Regs);
 
    if (Regs.b.al == 0x1a)
        return VIDEOCARD_VGA;
    else
        return VIDEOCARD_EGA;
}

Referenced by PcVideoInit().

PcVideoDisableCursorEmulation()

static VOID PcVideoDisableCursorEmulation ( VOID  )

static

Definition at line 613 of file pcvideo.c.

{
    REGS Regs;
 
    /* Int 10h AH=12h BL=34h
     * VIDEO - ALTERNATE FUNCTION SELECT (VGA) - CURSOR EMULATION
     *
     * AH = 12h
     * BL = 34h
     * AL = new state
     * 00h enable alphanumeric cursor emulation
     * 01h disable alphanumeric cursor emulation
     * Return:
     * AL = 12h if function supported
     *
     * Specify whether the BIOS should automatically remap cursor start/end
     * according to the current character height in text modes.
     */
    Regs.b.ah = 0x12;
    Regs.b.bl = 0x34;
    Regs.b.al = 0x01;
    Int386(0x10, &Regs, &Regs);
}

Referenced by PcVideoSetMode80x43(), PcVideoSetMode80x50_80x43(), and PcVideoSetMode80x60().

PcVideoGetBiosMode()

static BOOLEAN PcVideoGetBiosMode ( _Out_ PUSHORT  Mode )

static

Definition at line 333 of file pcvideo.c.

{
    REGS Regs;
 
    /* Int 10h AH=0Fh
     * VIDEO - GET CURRENT VIDEO MODE
     *
     * AH = 0Fh
     * Return:
     * AH = number of character columns
     * AL = display mode (see #00010 at AH=00h)
     * BH = active page (see AH=05h)
     *
     * Notes: If mode was set with bit 7 set ("no blanking"), the returned
     * mode will also have bit 7 set. EGA, VGA, and UltraVision return either
     * AL=03h (color) or AL=07h (monochrome) in all extended-row text modes.
     * HP 200LX returns AL=07h (monochrome) if mode was set to AL=21h and
     * always 80 resp. 40 columns in all text modes regardless of current
     * zoom setting (see AH=D0h). When using a Hercules Graphics Card,
     * additional checks are necessary:
     *
     * mode 05h:
     * If WORD 0040h:0063h is 03B4h, may be in graphics page 1
     * (as set by DOSSHELL and other Microsoft software)
     *
     * mode 06h:
     * If WORD 0040h:0063h is 03B4h, may be in graphics page 0
     * (as set by DOSSHELL and other Microsoft software)
     *
     * mode 07h:
     * If BYTE 0040h:0065h bit 1 is set, Hercules card is in
     * graphics mode, with bit 7 indicating the page (mode set by
     * Hercules driver for Borland Turbo C).
     * The Tandy 2000 BIOS is only documented as returning AL, not AH or BH
     */
    Regs.b.ah = 0x0F;
    Int386(0x10, &Regs, &Regs);
 
    if (Regs.b.ah == 0)
        return FALSE;
 
    *Mode = Regs.b.al;
    return TRUE;
}

Referenced by PcVideoGetDisplayMode().

PcVideoGetBufferSize()

ULONG PcVideoGetBufferSize

(

VOID

)

Definition at line 1121 of file pcvideo.c.

{
    return ScreenHeight * BytesPerScanLine;
}

Referenced by MachInit(), and PcVideoCopyOffScreenBufferToVRAM().

PcVideoGetDisplayMode()

static VOID PcVideoGetDisplayMode ( VOID  )

static

Definition at line 380 of file pcvideo.c.

{
    USHORT Mode = 0;
 
    /* Is the current mode VESA? */
    if (PcVideoVesaGetCurrentSVGAMode(&Mode) &&
        PcVideoVesaGetSVGAModeInformation(Mode, &VesaVideoModeInformation))
    {
        TRACE("VESA mode detected\n");
        ScreenWidth = VesaVideoModeInformation.WidthInPixels;
        ScreenHeight = VesaVideoModeInformation.HeightInPixels;
        BytesPerScanLine = VesaVideoModeInformation.BytesPerScanLine;
        BiosVideoMode = Mode;
        DisplayMode = (0x0108 <= Mode && Mode <= 0x010C) ? VideoTextMode : VideoGraphicsMode;
        VesaVideoMode = TRUE;
    }
    /* If not, it should be a regular BIOS mode */
    else if (PcVideoGetBiosMode(&Mode))
    {
        /*
         * The BIOS data area 0x400 holds information about the current video mode.
         * Infos at: https://web.archive.org/web/20240119203029/http://www.bioscentral.com/misc/bda.htm
         * https://stanislavs.org/helppc/bios_data_area.html
         */
 
        UCHAR BiosMode = (*(PUCHAR)0x449) & 0x7F; /* Current video mode */
        ASSERT(BiosMode == Mode);
        BiosVideoMode = Mode;
        TRACE("BIOS mode detected\n");
 
        ScreenWidth = *(PUSHORT)0x44A; /* Number of screen columns */
        ScreenHeight = 1 + *(PUCHAR)0x484; /* 1 + "Rows on the screen (less 1, EGA+)" */
 
        /*
         * Select bits 7 and 4 of "Video display data area (MCGA and VGA)"
         * |7|6|5|4|3|2|1|0|
         *  |     `------ see table below
         *  `--------- alphanumeric scan lines (see table below)
         *
         * then convert to a number and map it to the scanline number:
         * Bit7  Bit4  Scan Lines
         * 0     0     350 line mode
         * 0     1     400 line mode
         * 1     0     200 line mode
         * 1     1     reserved
         */
        BytesPerScanLine = (*(PUCHAR)0x489) & 0x90;
        BytesPerScanLine = ((BytesPerScanLine & 0x80) >> 6) | ((BytesPerScanLine & 0x10) >> 4);
        switch (BytesPerScanLine)
        {
            case VERTRES_200_SCANLINES:
                BytesPerScanLine = 200; break;
            case VERTRES_350_SCANLINES:
                BytesPerScanLine = 350; break;
            case VERTRES_400_SCANLINES:
                BytesPerScanLine = 400; break;
            default:
                BytesPerScanLine = 160; break;
        }
 
        DisplayMode = VideoTextMode;
        VesaVideoMode = FALSE;
    }
    else
    {
        /* Set the values for the default text mode.
         * If a graphics mode is set, these values will be changed. */
        TRACE("Fallback mode detected\n");
        BiosVideoMode = VIDEOMODE_NORMAL_TEXT;
        ScreenWidth = 80;
        ScreenHeight = 25;
        BytesPerScanLine = 160;
        DisplayMode = VideoTextMode;
        VesaVideoMode = FALSE;
    }
 
    TRACE("This is a %s video mode\n", VesaVideoMode ? "VESA" : "BIOS");
    TRACE("BiosVideoMode    = 0x%x\n", BiosVideoMode);
    TRACE("DisplayMode      = %sMode\n", DisplayMode == VideoTextMode ? "Text" : "Graphics");
    TRACE("ScreenWidth      = %lu\n", ScreenWidth);
    TRACE("ScreenHeight     = %lu\n", ScreenHeight);
    TRACE("BytesPerScanLine = %lu\n", BytesPerScanLine);
}

Referenced by PcVideoInit().

PcVideoGetDisplaySize()

VOID PcVideoGetDisplaySize	(	PULONG	Width,
		PULONG	Height,
		PULONG	Depth
	)

Definition at line 1097 of file pcvideo.c.

{
    *Width = ScreenWidth;
    *Height = ScreenHeight;
    if (VideoGraphicsMode == DisplayMode && VesaVideoMode)
    {
        if (VesaVideoModeInformation.BitsPerPixel == 16)
        {
            /* 16-bit color modes give green an extra bit (5:6:5)
             * 15-bit color modes have just 5:5:5 for R:G:B */
            *Depth = (VesaVideoModeInformation.GreenMaskSize == 6 ? 16 : 15);
        }
        else
        {
            *Depth = VesaVideoModeInformation.BitsPerPixel;
        }
    }
    else
    {
        *Depth = 0;
    }
}

Referenced by MachInit().

PcVideoGetFontsFromFirmware()

VOID PcVideoGetFontsFromFirmware

(

PULONG

RomFontPointers

)

Definition at line 1127 of file pcvideo.c.

{
    REGS BiosRegs;
 
    /* Get the address of the BIOS ROM fonts.
     * Int 10h, AX=1130h, BH = pointer specifier
     * Returns: es:bp = address */
    BiosRegs.d.eax = 0x1130;
    BiosRegs.b.bh = ROM_8x14CharacterFont;
    Int386(0x10, &BiosRegs, &BiosRegs);
    RomFontPointers[0] = BiosRegs.w.es << 4 | BiosRegs.w.bp;
 
    BiosRegs.b.bh = ROM_8x8DoubleDotFontLo;
    Int386(0x10, &BiosRegs, &BiosRegs);
    RomFontPointers[1] = BiosRegs.w.es << 16 | BiosRegs.w.bp;
 
    BiosRegs.b.bh = ROM_8x8DoubleDotFontHi;
    Int386(0x10, &BiosRegs, &BiosRegs);
    RomFontPointers[2] = BiosRegs.w.es << 16 | BiosRegs.w.bp;
 
    BiosRegs.b.bh = ROM_AlphaAlternate;
    Int386(0x10, &BiosRegs, &BiosRegs);
    RomFontPointers[3] = BiosRegs.w.es << 16 | BiosRegs.w.bp;
 
    BiosRegs.b.bh = ROM_8x16Font;
    Int386(0x10, &BiosRegs, &BiosRegs);
    RomFontPointers[4] = BiosRegs.w.es << 16 | BiosRegs.w.bp;
 
    BiosRegs.b.bh = ROM_Alternate9x16Font;
    Int386(0x10, &BiosRegs, &BiosRegs);
    RomFontPointers[5] = BiosRegs.w.es << 16 | BiosRegs.w.bp;
}

Referenced by MachInit().

PcVideoGetPaletteColor()

VOID PcVideoGetPaletteColor	(	UCHAR	Color,
		UCHAR *	Red,
		UCHAR *	Green,
		UCHAR *	Blue
	)

Definition at line 1276 of file pcvideo.c.

{
    WRITE_PORT_UCHAR((UCHAR*)VIDEOPORT_PALETTE_READ, Color);
    *Red = READ_PORT_UCHAR((UCHAR*)VIDEOPORT_PALETTE_DATA);
    *Green = READ_PORT_UCHAR((UCHAR*)VIDEOPORT_PALETTE_DATA);
    *Blue = READ_PORT_UCHAR((UCHAR*)VIDEOPORT_PALETTE_DATA);
}

Referenced by MachInit().

PcVideoHideShowTextCursor()

VOID PcVideoHideShowTextCursor

(

BOOLEAN

Show

)

Definition at line 1186 of file pcvideo.c.

{
    if (Show)
        PcVideoDefineCursor(0x0D, 0x0E);
    else
        PcVideoDefineCursor(0x20, 0x00);
}

Referenced by MachInit(), and PcVideoPrepareForReactOS().

PcVideoInit()

VOID PcVideoInit

(

VOID

)

Definition at line 1020 of file pcvideo.c.

{
    /* Detect the installed video card */
    VideoCard = PcVideoDetectVideoCard();
 
    /* Retrieve the initial display mode parameters */
    PcVideoGetDisplayMode();
 
    /* If any video options have been specified, try to set a display mode */
    if (BootMgrInfo.VideoOptions && *BootMgrInfo.VideoOptions)
        PcVideoSetDisplayMode(BootMgrInfo.VideoOptions, TRUE);
 
    // FIXME: We don't support graphics modes yet!
    // Revert to 80x25 text mode.
    if (DisplayMode != VideoTextMode)
        PcVideoSetMode(VIDEOMODE_NORMAL_TEXT);
}

Referenced by MachInit().

PcVideoIsPaletteFixed()

BOOLEAN PcVideoIsPaletteFixed

(

VOID

)

Definition at line 1261 of file pcvideo.c.

{
    return FALSE;
}

Referenced by MachInit().

PcVideoPrepareForReactOS()

VOID PcVideoPrepareForReactOS

(

VOID

)

Definition at line 1308 of file pcvideo.c.

{
    // PcVideoSetMode80x50_80x43();
    PcVideoSetMode80x25();
    PcVideoHideShowTextCursor(FALSE);
}

Referenced by PcPrepareForReactOS().

PcVideoPutChar()

VOID PcVideoPutChar	(	int	Ch,
		UCHAR	Attr,
		unsigned	X,
		unsigned	Y
	)

Definition at line 1252 of file pcvideo.c.

{
    USHORT *BufPtr;
 
    BufPtr = (USHORT*)(ULONG_PTR)(VIDEOTEXT_MEM_ADDRESS + Y * BytesPerScanLine + X * 2);
    *BufPtr = ((USHORT)Attr << 8) | (Ch & 0xff);
}

Referenced by MachInit().

PcVideoSelectAlternatePrintScreen()

static VOID PcVideoSelectAlternatePrintScreen ( VOID  )

static

Definition at line 589 of file pcvideo.c.

{
    REGS Regs;
 
    /* Int 10h AH=12h BL=20h
     * VIDEO - ALTERNATE FUNCTION SELECT (PS,EGA,VGA,MCGA) - ALTERNATE PRTSC
     *
     * AH = 12h
     * BL = 20h select alternate print screen routine
     * Return:
     * Nothing
     *
     * Installs a PrtSc routine from the video card's BIOS to replace the
     * default PrtSc handler from the ROM BIOS, which usually does not
     * understand screen heights other than 25 lines.
     *
     * Some adapters disable print-screen instead of enhancing it.
     */
    Regs.b.ah = 0x12;
    Regs.b.bl = 0x20;
    Int386(0x10, &Regs, &Regs);
}

Referenced by PcVideoSetMode80x43(), PcVideoSetMode80x50_80x43(), and PcVideoSetMode80x60().

PcVideoSet480ScanLines()

static VOID PcVideoSet480ScanLines ( VOID  )

static

Definition at line 701 of file pcvideo.c.

{
    INT_PTR CRTC;
 
    /* Read CRTC port */
    CRTC = READ_PORT_UCHAR((PUCHAR)0x03CC);
    if (CRTC & 1)
        CRTC = 0x3D4;
    else
        CRTC = 0x3B4;
 
    /* Vertical sync end (also unlocks CR0-7) */
    WRITE_PORT_UCHAR((PUCHAR)CRTC, 0x11);
    WRITE_PORT_UCHAR((PUCHAR)CRTC+1, 0x0C);
 
    /* Vertical total */
    WRITE_PORT_UCHAR((PUCHAR)CRTC, 0x06);
    WRITE_PORT_UCHAR((PUCHAR)CRTC+1, 0x0B);
 
    /* (vertical) overflow */
    WRITE_PORT_UCHAR((PUCHAR)CRTC, 0x07);
    WRITE_PORT_UCHAR((PUCHAR)CRTC+1, 0x3E);
 
    /* Vertical sync start */
    WRITE_PORT_UCHAR((PUCHAR)CRTC, 0x10);
    WRITE_PORT_UCHAR((PUCHAR)CRTC+1, 0xEA);
 
    /* Vertical display end */
    WRITE_PORT_UCHAR((PUCHAR)CRTC, 0x12);
    WRITE_PORT_UCHAR((PUCHAR)CRTC+1, 0xDF);
 
    /* Vertical blank start */
    WRITE_PORT_UCHAR((PUCHAR)CRTC, 0x15);
    WRITE_PORT_UCHAR((PUCHAR)CRTC+1, 0xE7);
 
    /* Vertical blank end */
    WRITE_PORT_UCHAR((PUCHAR)CRTC, 0x16);
    WRITE_PORT_UCHAR((PUCHAR)CRTC+1, 0x04);
 
    /* Misc output register (read) */
    CRTC = READ_PORT_UCHAR((PUCHAR)0x03CC);
 
    /* Preserve clock select bits and color bit */
    CRTC = (CRTC & 0x0D);
    /* Set correct sync polarity */
    CRTC = (CRTC | 0xE2);
 
    /* (write) */
    WRITE_PORT_UCHAR((PUCHAR)0x03C2, (UCHAR)CRTC);
}

Referenced by PcVideoSetMode80x30(), PcVideoSetMode80x34(), and PcVideoSetMode80x60().

PcVideoSetBiosMode()

static VOID PcVideoSetBiosMode ( UCHAR  VideoMode )

static

Definition at line 531 of file pcvideo.c.

{
    REGS Regs;
 
    /* Int 10h AH=00h
     * VIDEO - SET VIDEO MODE
     *
     * AH = 00h
     * AL = desired video mode
     * Return:
     * AL = video mode flag (Phoenix, AMI BIOS)
     * 20h mode > 7
     * 30h modes 0-5 and 7
     * 3Fh mode 6
     * AL = CRT controller mode byte (Phoenix 386 BIOS v1.10)
     */
    Regs.b.ah = 0x00;
    Regs.b.al = VideoMode;
    Int386(0x10, &Regs, &Regs);
}

Referenced by PcVideoSetMode(), PcVideoSetMode80x25(), and PcVideoSetMode80x50_80x43().

PcVideoSetBiosVesaMode()

static BOOLEAN PcVideoSetBiosVesaMode ( USHORT  Mode )

static

Definition at line 465 of file pcvideo.c.

{
    REGS Regs;
 
    /* Int 10h AX=4F02h
     * VESA SuperVGA BIOS - SET SuperVGA VIDEO MODE
     *
     * AX = 4F02h
     * BX = new video mode
     * ES:DI -> (VBE 3.0+) CRTC information block, bit mode bit 11 set
     * Return:
     * AL = 4Fh if function supported
     * AH = status
     * 00h successful
     * 01h failed
     *
     * Values for VESA video mode:
     * 00h-FFh OEM video modes (see #00010 at AH=00h)
     * 100h   640x400x256
     * 101h   640x480x256
     * 102h   800x600x16
     * 103h   800x600x256
     * 104h   1024x768x16
     * 105h   1024x768x256
     * 106h   1280x1024x16
     * 107h   1280x1024x256
     * 108h   80x60 text
     * 109h   132x25 text
     * 10Ah   132x43 text
     * 10Bh   132x50 text
     * 10Ch   132x60 text
     * ---VBE v1.2+ ---
     * 10Dh   320x200x32K
     * 10Eh   320x200x64K
     * 10Fh   320x200x16M
     * 110h   640x480x32K
     * 111h   640x480x64K
     * 112h   640x480x16M
     * 113h   800x600x32K
     * 114h   800x600x64K
     * 115h   800x600x16M
     * 116h   1024x768x32K
     * 117h   1024x768x64K
     * 118h   1024x768x16M
     * 119h   1280x1024x32K (1:5:5:5)
     * 11Ah   1280x1024x64K (5:6:5)
     * 11Bh   1280x1024x16M
     * ---VBE 2.0+ ---
     * 120h   1600x1200x256
     * 121h   1600x1200x32K
     * 122h   1600x1200x64K
     * 81FFh   special full-memory access mode
     *
     * Notes: The special mode 81FFh preserves the contents of the video memory and gives
     * access to all of the memory; VESA recommends that the special mode be a packed-pixel
     * mode. For VBE 2.0+, it is required that the VBE implement the mode, but not place it
     * in the list of available modes (mode information for this mode can be queried
     * directly, however). As of VBE 2.0, VESA will no longer define video mode numbers.
     */
    Regs.w.ax = 0x4F02;
    Regs.w.bx = Mode;
    Int386(0x10, &Regs, &Regs);
    return (Regs.w.ax == 0x004F);
}

Referenced by PcVideoSetMode().

PcVideoSetBlinkBit()

static VOID PcVideoSetBlinkBit ( BOOLEAN  Enable )

static

Definition at line 959 of file pcvideo.c.

{
    REGS Regs;
 
    /* Int 10h AX=1003h
     * VIDEO - TOGGLE INTENSITY/BLINKING BIT (Jr, PS, TANDY 1000, EGA, VGA)
     *
     * AX = 1003h
     * BL = new state
     * 00h background intensity enabled
     * 01h blink enabled
     * BH = 00h to avoid problems on some adapters
     * Return:
     * Nothing
     *
     * Note: although there is no function to get
     * the current status, bit 5 of 0040h:0065h
     * indicates the state.
     */
    Regs.w.ax = 0x1003;
    Regs.w.bx = Enable ? 0x0001 : 0x0000;
    Int386(0x10, &Regs, &Regs);
}

Referenced by PcVideoSetDisplayMode().

PcVideoSetDisplayEnd()

static VOID PcVideoSetDisplayEnd ( VOID  )

static

Definition at line 753 of file pcvideo.c.

{
    INT_PTR CRTC;
 
    /* Read CRTC port */
    CRTC = READ_PORT_UCHAR((PUCHAR)0x03CC);
    if (CRTC & 1)
        CRTC = 0x3D4;
    else
        CRTC = 0x3B4;
 
    /* Vertical display end */
    WRITE_PORT_UCHAR((PUCHAR)CRTC, 0x12);
    WRITE_PORT_UCHAR((PUCHAR)CRTC+1, 0xDF);
}

Referenced by PcVideoSetMode80x34(), and PcVideoSetMode80x60().

PcVideoSetDisplayMode()

VIDEODISPLAYMODE PcVideoSetDisplayMode	(	PCSTR	DisplayModeName,
		BOOLEAN	Init
	)

Definition at line 1045 of file pcvideo.c.

{
    USHORT VideoMode = VIDEOMODE_NORMAL_TEXT;
 
    if (!DisplayModeName || *DisplayModeName == '\0')
        goto Quit;
 
    if (VideoCard == VIDEOCARD_CGA_OR_OTHER)
    {
        TRACE_printf("CGA or other display adapter detected.\n");
        TRACE_printf("Using 80x25 text mode.\n");
        VideoMode = VIDEOMODE_NORMAL_TEXT;
    }
    else if (VideoCard == VIDEOCARD_EGA)
    {
        TRACE_printf("EGA display adapter detected.\n");
        TRACE_printf("Using 80x25 text mode.\n");
        VideoMode = VIDEOMODE_NORMAL_TEXT;
    }
    else /* VIDEOCARD_VGA */
    {
        TRACE_printf("VGA display adapter detected.\n");
 
        /* Get the video option separator, if any */
        size_t NameLen = strcspn(DisplayModeName, ",");
        if (!NameLen)
            goto Quit;
 
        if (_strnicmp(DisplayModeName, "NORMAL_VGA", NameLen) == 0)
            VideoMode = VIDEOMODE_NORMAL_TEXT;
        else if (_strnicmp(DisplayModeName, "EXTENDED_VGA", NameLen) == 0)
            VideoMode = VIDEOMODE_EXTENDED_TEXT;
        else
            VideoMode = (USHORT)strtoul(DisplayModeName, NULL, 0);
    }
 
    if (!PcVideoSetMode(VideoMode))
    {
        TRACE_printf("Error: unable to set video display mode 0x%x\n", VideoMode);
        TRACE_printf("Defaulting to 80x25 text mode.\n");
        printf("Press any key to continue.\n");
        PcConsGetCh();
 
        PcVideoSetMode(VIDEOMODE_NORMAL_TEXT);
    }
 
Quit:
    PcVideoSetBlinkBit(!Init);
    return DisplayMode;
}

Referenced by MachInit(), and PcVideoInit().

PcVideoSetFont8x14()

static VOID PcVideoSetFont8x14 ( VOID  )

static

Definition at line 571 of file pcvideo.c.

{
    REGS Regs;
 
    /* Int 10h AX=1111h
     * VIDEO - TEXT-MODE CHARGEN - LOAD ROM MONOCHROME PATTERNS (PS,EGA,VGA)
     *
     * AX = 1111h
     * BL = block to load
     * Return:
     * Nothing
     */
    Regs.w.ax = 0x1111;
    Regs.b.bl = 0;
    Int386(0x10, &Regs, &Regs);
}

Referenced by PcVideoSetMode80x28(), and PcVideoSetMode80x34().

PcVideoSetFont8x8()

static VOID PcVideoSetFont8x8 ( VOID  )

static

Definition at line 553 of file pcvideo.c.

{
    REGS Regs;
 
    /* Int 10h AX=1112h
     * VIDEO - TEXT-MODE CHARGEN - LOAD ROM 8x8 DBL-DOT PATTERNS (PS,EGA,VGA)
     *
     * AX = 1112h
     * BL = block to load
     * Return:
     * Nothing
     */
    Regs.w.ax = 0x1112;
    Regs.b.bl = 0x00;
    Int386(0x10, &Regs, &Regs);
}

Referenced by PcVideoSetMode80x43(), PcVideoSetMode80x50_80x43(), and PcVideoSetMode80x60().

PcVideoSetMemoryBank()

static VOID PcVideoSetMemoryBank ( USHORT  BankNumber )

static

Definition at line 984 of file pcvideo.c.

{
    REGS Regs;
 
    if (CurrentMemoryBank == BankNumber)
        return;
 
    /* Int 10h AX=4F05h
     * VESA SuperVGA BIOS - CPU VIDEO MEMORY CONTROL
     *
     * AX = 4F05h
     * BH = subfunction
     * 00h select video memory window
     * 01h get video memory window
     * DX = window address in video memory (in granularity units)
     * Return:
     * DX = window address in video memory (in gran. units)
     * BL = window number
     * 00h window A
     * 01h window B.
     * Return:
     * AL = 4Fh if function supported
     * AH = status
     * 00h successful
     * 01h failed
     */
    Regs.w.ax = 0x4F05;
    Regs.w.bx = 0x0000;
    Regs.w.dx = BankNumber;
    Int386(0x10, &Regs, &Regs);
 
    if (Regs.w.ax == 0x004F)
        CurrentMemoryBank = BankNumber;
}

Referenced by PcVideoCopyOffScreenBufferToVRAM().

PcVideoSetMode()

static BOOLEAN PcVideoSetMode ( USHORT  NewMode )

static

Definition at line 878 of file pcvideo.c.

{
    CurrentMemoryBank = 0;
 
    /* Set the values for the default text modes
     * If they are setting a graphics mode then
     * these values will be changed. */
    BiosVideoMode = NewMode;
    ScreenWidth = 80;
    ScreenHeight = 25;
    BytesPerScanLine = 160;
    DisplayMode = VideoTextMode;
    VesaVideoMode = FALSE;
 
    switch (NewMode)
    {
        case VIDEOMODE_NORMAL_TEXT:
        case 0x03: /* BIOS 80x25 text mode number */
            return PcVideoSetMode80x25();
        case VIDEOMODE_EXTENDED_TEXT:
            return PcVideoSetMode80x50_80x43();
        case VIDEOMODE_80X28:
            return PcVideoSetMode80x28();
        case VIDEOMODE_80X30:
            return PcVideoSetMode80x30();
        case VIDEOMODE_80X34:
            return PcVideoSetMode80x34();
        case VIDEOMODE_80X43:
            return PcVideoSetMode80x43();
        case VIDEOMODE_80X60:
            return PcVideoSetMode80x60();
    }
 
    if (NewMode == 0x12)
    {
        /* 640x480x16 */
        PcVideoSetBiosMode((UCHAR)NewMode);
        WRITE_PORT_USHORT((USHORT*)0x03CE, 0x0F01); /* For some reason this is necessary? */
        ScreenWidth = 640;
        ScreenHeight = 480;
        BytesPerScanLine = 80;
        BiosVideoMode = NewMode;
        DisplayMode = VideoGraphicsMode;
 
        return TRUE;
    }
    else if (NewMode == 0x13)
    {
        /* 320x200x256 */
        PcVideoSetBiosMode((UCHAR)NewMode);
        ScreenWidth = 320;
        ScreenHeight = 200;
        BytesPerScanLine = 320;
        BiosVideoMode = NewMode;
        DisplayMode = VideoGraphicsMode;
 
        return TRUE;
    }
    else
    {
        /* VESA Text/Graphics Mode */
        if (!PcVideoVesaGetSVGAModeInformation(NewMode, &VesaVideoModeInformation))
            return FALSE;
 
        if (!PcVideoSetBiosVesaMode(NewMode))
            return FALSE;
 
        ScreenWidth = VesaVideoModeInformation.WidthInPixels;
        ScreenHeight = VesaVideoModeInformation.HeightInPixels;
        BytesPerScanLine = VesaVideoModeInformation.BytesPerScanLine;
        BiosVideoMode = NewMode;
        DisplayMode = (0x0108 <= NewMode && NewMode <= 0x010C) ? VideoTextMode : VideoGraphicsMode;
        VesaVideoMode = TRUE;
 
        return TRUE;
    }
 
    return FALSE;
}

Referenced by PcVideoInit(), and PcVideoSetDisplayMode().

PcVideoSetMode80x25()

static BOOLEAN PcVideoSetMode80x25 ( VOID  )

static

Definition at line 770 of file pcvideo.c.

{
    PcVideoSetBiosMode(0x03);
    ScreenWidth = 80;
    ScreenHeight = 25;
    return TRUE;
}

Referenced by PcVideoPrepareForReactOS(), PcVideoSetMode(), PcVideoSetMode80x28(), PcVideoSetMode80x30(), PcVideoSetMode80x34(), PcVideoSetMode80x43(), and PcVideoSetMode80x60().

PcVideoSetMode80x28()

static BOOLEAN PcVideoSetMode80x28 ( VOID  )

static

Definition at line 810 of file pcvideo.c.

{
    /* FIXME: Is this VGA-only? */
    PcVideoSetMode80x25();
    PcVideoSetFont8x14();
    PcVideoDefineCursor(11, 12);
    ScreenWidth = 80;
    ScreenHeight = 28;
    return TRUE;
}

Referenced by PcVideoSetMode().

PcVideoSetMode80x30()

static BOOLEAN PcVideoSetMode80x30 ( VOID  )

static

Definition at line 822 of file pcvideo.c.

{
    /* FIXME: Is this VGA-only? */
    PcVideoSetMode80x25();
    PcVideoSet480ScanLines();
    ScreenWidth = 80;
    ScreenHeight = 30;
    return TRUE;
}

Referenced by PcVideoSetMode().

PcVideoSetMode80x34()

static BOOLEAN PcVideoSetMode80x34 ( VOID  )

static

Definition at line 833 of file pcvideo.c.

{
    /* FIXME: Is this VGA-only? */
    PcVideoSetMode80x25();
    PcVideoSet480ScanLines();
    PcVideoSetFont8x14();
    PcVideoDefineCursor(11, 12);
    PcVideoSetDisplayEnd();
    ScreenWidth = 80;
    ScreenHeight = 34;
    return TRUE;
}

Referenced by PcVideoSetMode().

PcVideoSetMode80x43()

static BOOLEAN PcVideoSetMode80x43 ( VOID  )

static

Definition at line 847 of file pcvideo.c.

{
    /* FIXME: Is this VGA-only? */
    PcVideoSetVerticalResolution(VERTRES_350_SCANLINES);
    PcVideoSetMode80x25();
    PcVideoSetFont8x8();
    PcVideoSelectAlternatePrintScreen();
    PcVideoDisableCursorEmulation();
    PcVideoDefineCursor(6, 7);
    ScreenWidth = 80;
    ScreenHeight = 43;
    return TRUE;
}

Referenced by PcVideoSetMode().

PcVideoSetMode80x50_80x43()

static BOOLEAN PcVideoSetMode80x50_80x43 ( VOID  )

static

Definition at line 779 of file pcvideo.c.

{
    if (VideoCard == VIDEOCARD_VGA)
    {
        PcVideoSetBiosMode(0x03);
        PcVideoSetFont8x8();
        PcVideoSelectAlternatePrintScreen();
        PcVideoDisableCursorEmulation();
        PcVideoDefineCursor(6, 7);
        ScreenWidth = 80;
        ScreenHeight = 50;
    }
    else if (VideoCard == VIDEOCARD_EGA)
    {
        PcVideoSetBiosMode(0x03);
        PcVideoSetFont8x8();
        PcVideoSelectAlternatePrintScreen();
        PcVideoDisableCursorEmulation();
        PcVideoDefineCursor(6, 7);
        ScreenWidth = 80;
        ScreenHeight = 43;
    }
    else /* VIDEOCARD_CGA_OR_OTHER */
    {
        return FALSE;
    }
 
    return TRUE;
}

Referenced by PcVideoSetMode().

PcVideoSetMode80x60()

static BOOLEAN PcVideoSetMode80x60 ( VOID  )

static

Definition at line 862 of file pcvideo.c.

{
    /* FIXME: Is this VGA-only? */
    PcVideoSetMode80x25();
    PcVideoSet480ScanLines();
    PcVideoSetFont8x8();
    PcVideoSelectAlternatePrintScreen();
    PcVideoDisableCursorEmulation();
    PcVideoDefineCursor(6, 7);
    PcVideoSetDisplayEnd();
    ScreenWidth = 80;
    ScreenHeight = 60;
    return TRUE;
}

Referenced by PcVideoSetMode().

PcVideoSetPaletteColor()

VOID PcVideoSetPaletteColor	(	UCHAR	Color,
		UCHAR	Red,
		UCHAR	Green,
		UCHAR	Blue
	)

Definition at line 1267 of file pcvideo.c.

{
    WRITE_PORT_UCHAR((UCHAR*)VIDEOPORT_PALETTE_WRITE, Color);
    WRITE_PORT_UCHAR((UCHAR*)VIDEOPORT_PALETTE_DATA, Red);
    WRITE_PORT_UCHAR((UCHAR*)VIDEOPORT_PALETTE_DATA, Green);
    WRITE_PORT_UCHAR((UCHAR*)VIDEOPORT_PALETTE_DATA, Blue);
}

Referenced by MachInit().

PcVideoSetTextCursorPosition()

VOID PcVideoSetTextCursorPosition	(	UCHAR	X,
		UCHAR	Y
	)

Definition at line 1161 of file pcvideo.c.

{
    REGS Regs;
 
    /* Int 10h AH=02h
     * VIDEO - SET CURSOR POSITION
     *
     * AH = 02h
     * BH = page number
     * 0-3 in modes 2&3
     * 0-7 in modes 0&1
     * 0 in graphics modes
     * DH = row (00h is top)
     * DL = column (00h is left)
     * Return:
     * Nothing
     */
    Regs.b.ah = 0x02;
    Regs.b.bh = 0x00;
    Regs.b.dh = Y;
    Regs.b.dl = X;
    Int386(0x10, &Regs, &Regs);
}

Referenced by MachInit().

PcVideoSetVerticalResolution()

static VOID PcVideoSetVerticalResolution ( UCHAR  VerticalResolutionMode )

static

Definition at line 674 of file pcvideo.c.

{
    REGS Regs;
 
    /* Int 10h AH=12h BL=30h
     * VIDEO - ALTERNATE FUNCTION SELECT (VGA) - SELECT VERTICAL RESOLUTION
     *
     * AH = 12h
     * BL = 30h
     * AL = vertical resolution
     * 00h 200 scan lines
     * 01h 350 scan lines
     * 02h 400 scan lines
     * Return:
     * AL = 12h if function supported
     *
     * Specify the number of scan lines used to display text modes.
     *
     * The specified resolution will take effect on the next mode set.
     */
    Regs.b.ah = 0x12;
    Regs.b.bl = 0x30;
    Regs.b.al = VerticalResolutionMode;
    Int386(0x10, &Regs, &Regs);
}

Referenced by PcVideoSetMode80x43().

PcVideoSync()

VOID PcVideoSync

(

VOID

)

Definition at line 1285 of file pcvideo.c.

{
    while ((READ_PORT_UCHAR((UCHAR*)VIDEOPORT_VERTICAL_RETRACE) & 0x08))
    {
        /*
         * Keep reading the port until bit 3 is clear
         * This waits for the current retrace to end and
         * we can catch the next one so we know we are
         * getting a full retrace.
         */
    }
 
    while (!(READ_PORT_UCHAR((UCHAR*)VIDEOPORT_VERTICAL_RETRACE) & 0x08))
    {
        /*
         * Keep reading the port until bit 3 is set
         * Now that we know we aren't doing a vertical
         * retrace we need to wait for the next one.
         */
    }
}

Referenced by MachInit().

PcVideoVesaGetCurrentSVGAMode()

static BOOLEAN PcVideoVesaGetCurrentSVGAMode ( _Out_ PUSHORT  Mode )

static

Definition at line 297 of file pcvideo.c.

{
    REGS Regs;
 
    /*
     * VESA SuperVGA BIOS - GET CURRENT VIDEO MODE
     *
     * AX = 4F03h
     * Return:
     * AL = 4Fh if function supported
     * AH = status
     * 00h successful
     * BX = video mode (see #00083,#00084)
     *
     * bit 13:
     * VBE/AF v1.0P accelerated video mode
     *
     * bit 14:
     * Linear frame buffer enabled (VBE v2.0+)
     *
     * bit 15:
     * Don't clear video memory
     * 01h failed
     */
    Regs.w.ax = 0x4F03;
    Int386(0x10, &Regs, &Regs);
 
    if (Regs.w.ax != 0x004F)
        return FALSE;
 
    *Mode = Regs.w.bx;
    return TRUE;
}

Referenced by PcVideoGetDisplayMode().

PcVideoVesaGetSVGAModeInformation()

static BOOLEAN PcVideoVesaGetSVGAModeInformation ( _In_ USHORT  Mode, _Out_ PSVGA_MODE_INFORMATION  ModeInformation  )

static

Definition at line 206 of file pcvideo.c.

{
    REGS Regs;
 
    RtlZeroMemory((PVOID)BIOSCALLBUFFER, sizeof(*ModeInformation));
 
    /* VESA SuperVGA BIOS - GET SuperVGA MODE INFORMATION
     * AX = 4F01h
     * CX = SuperVGA video mode (see #04082 for bitfields)
     * ES:DI -> 256-byte buffer for mode information (see #00079)
     * Return:
     * AL = 4Fh if function supported
     * AH = status
     * 00h successful
     * ES:DI buffer filled
     * 01h failed
     *
     * Desc: Determine the attributes of the specified video mode.
     *
     * Note: While VBE 1.1 and higher will zero out all unused bytes
     * of the buffer, v1.0 did not, so applications that want to be
     * backward compatible should clear the buffer before calling.
     */
    Regs.w.ax = 0x4F01;
    Regs.w.cx = Mode;
    Regs.w.es = BIOSCALLBUFSEGMENT;
    Regs.w.di = BIOSCALLBUFOFFSET;
    Int386(0x10, &Regs, &Regs);
 
    if (Regs.w.ax != 0x004F)
        return FALSE;
 
    RtlCopyMemory(ModeInformation, (PVOID)BIOSCALLBUFFER, sizeof(*ModeInformation));
 
    TRACE("\n");
    TRACE("BiosVesaGetSVGAModeInformation(Mode 0x%x)\n", Mode);
    TRACE("ModeAttributes = 0x%04x\n", ModeInformation->ModeAttributes);
    TRACE("WindowAttributesA = 0x%02x\n", ModeInformation->WindowAttributesA);
    TRACE("WindowAttributesB = 0x%02x\n", ModeInformation->WindowsAttributesB);
    TRACE("WindowGranularity = %huKB\n", ModeInformation->WindowGranularity);
    TRACE("WindowSize = %huKB\n", ModeInformation->WindowSize);
    TRACE("WindowAStartSegment = 0x%04x\n", ModeInformation->WindowAStartSegment);
    TRACE("WindowBStartSegment = 0x%04x\n", ModeInformation->WindowBStartSegment);
    TRACE("WindowPositioningFunction = 0x%x\n", ModeInformation->WindowPositioningFunction);
    TRACE("BytesPerScanLine = %hu\n", ModeInformation->BytesPerScanLine);
    TRACE("WidthInPixels = %hu\n", ModeInformation->WidthInPixels);
    TRACE("HeightInPixels = %hu\n", ModeInformation->HeightInPixels);
    TRACE("CharacterWidthInPixels = %u\n", ModeInformation->CharacterWidthInPixels);
    TRACE("CharacterHeightInPixels = %u\n", ModeInformation->CharacterHeightInPixels);
    TRACE("NumberOfMemoryPlanes = %u\n", ModeInformation->NumberOfMemoryPlanes);
    TRACE("BitsPerPixel = %u\n", ModeInformation->BitsPerPixel);
    TRACE("NumberOfBanks = %u\n", ModeInformation->NumberOfBanks);
    TRACE("MemoryModel = %u\n", ModeInformation->MemoryModel);
    TRACE("BankSize = %u\n", ModeInformation->BankSize);
    TRACE("NumberOfImagePanes = %u\n", ModeInformation->NumberOfImagePanes);
    TRACE("Reserved1 = 0x%02x\n", ModeInformation->Reserved1);
    TRACE("---VBE v1.2+ ---\n");
    TRACE("RedMaskSize = %u\n", ModeInformation->RedMaskSize);
    TRACE("RedMaskPosition = %u\n", ModeInformation->RedMaskPosition);
    TRACE("GreenMaskSize = %u\n", ModeInformation->GreenMaskSize);
    TRACE("GreenMaskPosition = %u\n", ModeInformation->GreenMaskPosition);
    TRACE("BlueMaskSize = %u\n", ModeInformation->BlueMaskSize);
    TRACE("BlueMaskPosition = %u\n", ModeInformation->BlueMaskPosition);
    TRACE("ReservedMaskSize = %u\n", ModeInformation->ReservedMaskSize);
    TRACE("ReservedMaskPosition = %u\n", ModeInformation->ReservedMaskPosition);
    TRACE("DirectColorModeInfo = 0x%02x\n", ModeInformation->DirectColorModeInfo);
    TRACE("---VBE v2.0+ ---\n");
    TRACE("LinearVideoBufferAddress = 0x%x\n", ModeInformation->LinearVideoBufferAddress);
    TRACE("OffscreenMemoryPointer = 0x%x\n", ModeInformation->OffscreenMemoryPointer);
    TRACE("OffscreenMemorySize = %huKB\n", ModeInformation->OffscreenMemorySize);
    TRACE("---VBE v3.0 ---\n");
    TRACE("LinearBytesPerScanLine = %hu\n", ModeInformation->LinearBytesPerScanLine);
    TRACE("BankedNumberOfImages = %u\n", ModeInformation->BankedNumberOfImages);
    TRACE("LinearNumberOfImages = %u\n", ModeInformation->LinearNumberOfImages);
    TRACE("LinearRedMaskSize = %u\n", ModeInformation->LinearRedMaskSize);
    TRACE("LinearRedMaskPosition = %u\n", ModeInformation->LinearRedMaskPosition);
    TRACE("LinearGreenMaskSize = %u\n", ModeInformation->LinearGreenMaskSize);
    TRACE("LinearGreenMaskPosition = %u\n", ModeInformation->LinearGreenMaskPosition);
    TRACE("LinearBlueMaskSize = %u\n", ModeInformation->LinearBlueMaskSize);
    TRACE("LinearBlueMaskPosition = %u\n", ModeInformation->LinearBlueMaskPosition);
    TRACE("LinearReservedMaskSize = %u\n", ModeInformation->LinearReservedMaskSize);
    TRACE("LinearReservedMaskPosition = %u\n", ModeInformation->LinearReservedMaskPosition);
    TRACE("MaximumPixelClock = %luHz\n", ModeInformation->MaximumPixelClock);
    TRACE("\n");
 
    return TRUE;
}

Referenced by PcVideoGetDisplayMode(), and PcVideoSetMode().

Variable Documentation

BiosVideoMode

USHORT BiosVideoMode = VIDEOMODE_NORMAL_TEXT

static

Definition at line 115 of file pcvideo.c.

Referenced by PcVideoGetDisplayMode(), and PcVideoSetMode().

BytesPerScanLine

ULONG BytesPerScanLine = 160

static

Definition at line 118 of file pcvideo.c.

Referenced by PcVideoGetBufferSize(), PcVideoGetDisplayMode(), PcVideoPutChar(), and PcVideoSetMode().

CurrentMemoryBank

ULONG CurrentMemoryBank = 0

static

Definition at line 122 of file pcvideo.c.

Referenced by PcVideoSetMemoryBank(), and PcVideoSetMode().

DisplayMode

VIDEODISPLAYMODE DisplayMode = VideoTextMode

static

Definition at line 119 of file pcvideo.c.

Referenced by ConsoleFirmwareTextOpen(), ConsoleGraphicalGetGraphicalResolution(), ConsoleGraphicalGetOriginalResolution(), DeviceCreateHardwarePageEx(), DsppInitialize(), EnumDisplayModes(), GuiGetDisplayMode(), PcVideoCopyOffScreenBufferToVRAM(), PcVideoGetDisplayMode(), PcVideoGetDisplaySize(), PcVideoInit(), PcVideoSetDisplayMode(), PcVideoSetMode(), and Test_DisplayModes().

MachDefaultTextColor

UCHAR MachDefaultTextColor = COLOR_GRAY

Definition at line 112 of file pcvideo.c.

ScreenHeight

ULONG ScreenHeight = 25

static

Definition at line 117 of file pcvideo.c.

Referenced by PcVideoGetBufferSize(), PcVideoGetDisplayMode(), PcVideoGetDisplaySize(), PcVideoSetMode(), PcVideoSetMode80x25(), PcVideoSetMode80x28(), PcVideoSetMode80x30(), PcVideoSetMode80x34(), PcVideoSetMode80x43(), PcVideoSetMode80x50_80x43(), PcVideoSetMode80x60(), VidFbInitializeVideo(), and XboxVideoInit().

ScreenWidth

ULONG ScreenWidth = 80

static

Definition at line 116 of file pcvideo.c.

Referenced by LlbVideoDrawChar(), LlbVideoPutChar(), NvGetBytesPerPixel(), PcVideoGetDisplayMode(), PcVideoGetDisplaySize(), PcVideoSetMode(), PcVideoSetMode80x25(), PcVideoSetMode80x28(), PcVideoSetMode80x30(), PcVideoSetMode80x34(), PcVideoSetMode80x43(), PcVideoSetMode80x50_80x43(), PcVideoSetMode80x60(), VidFbInitializeVideo(), and XboxVideoInit().

VesaVideoMode

BOOLEAN VesaVideoMode = FALSE

static

Definition at line 120 of file pcvideo.c.

Referenced by PcVideoCopyOffScreenBufferToVRAM(), PcVideoGetDisplayMode(), PcVideoGetDisplaySize(), and PcVideoSetMode().

VesaVideoModeInformation

SVGA_MODE_INFORMATION VesaVideoModeInformation

static

Definition at line 121 of file pcvideo.c.

Referenced by PcVideoCopyOffScreenBufferToVRAM(), PcVideoGetDisplayMode(), PcVideoGetDisplaySize(), and PcVideoSetMode().

VideoCard

ULONG VideoCard = VIDEOCARD_CGA_OR_OTHER

static

Definition at line 114 of file pcvideo.c.

Referenced by PcVideoInit(), PcVideoSetDisplayMode(), and PcVideoSetMode80x50_80x43().