pc98video.c File Reference

#include <freeldr.h>
#include <drivers/pc98/video.h>
#include "../../vgafont.h"

Include dependency graph for pc98video.c:

Go to the source code of this file.

Macros
#define	VGA_CHAR_SIZE   2
#define	TEXT_CHAR_SIZE   2
#define	SCREEN_WIDTH   640
#define	SCREEN_HEIGHT   400
#define	BYTES_PER_SCANLINE   (SCREEN_WIDTH / 8)

Functions
VOID	Pc98VideoInit (VOID)
VOID	Pc98VideoClearScreen (UCHAR Attr)
VIDEODISPLAYMODE	Pc98VideoSetDisplayMode (PCSTR DisplayModeName, BOOLEAN Init)
VOID	Pc98VideoGetDisplaySize (PULONG Width, PULONG Height, PULONG Depth)
ULONG	Pc98VideoGetBufferSize (VOID)
VOID	Pc98VideoGetFontsFromFirmware (PULONG RomFontPointers)
VOID	Pc98VideoSetTextCursorPosition (UCHAR X, UCHAR Y)
VOID	Pc98VideoHideShowTextCursor (BOOLEAN Show)
static UCHAR	Pc98VideoAttrToGdcAttr (UCHAR Attr)
static USHORT	Pc98AsciiToJisX (int Ch)
static VOID	Pc98VideoTextRamPutChar (int Ch, UCHAR Attr, unsigned X, unsigned Y)
VOID	Pc98VideoPutChar (int Ch, UCHAR Attr, unsigned X, unsigned Y)
VOID	Pc98VideoCopyOffScreenBufferToVRAM (PVOID Buffer)
BOOLEAN	Pc98VideoIsPaletteFixed (VOID)
VOID	Pc98VideoSetPaletteColor (UCHAR Color, UCHAR Red, UCHAR Green, UCHAR Blue)
VOID	Pc98VideoGetPaletteColor (UCHAR Color, UCHAR *Red, UCHAR *Green, UCHAR *Blue)
VOID	Pc98VideoSync (VOID)
VOID	Pc98VideoPrepareForReactOS (VOID)

Variables
BOOLEAN	HiResoMachine
UCHAR	TextCols
UCHAR	TextLines
static BOOLEAN	UseCGFont = TRUE
static BOOLEAN	CGAccelDraw = TRUE
UCHAR	MachDefaultTextColor = COLOR_WHITE
ULONG	VramText
static ULONG	VramPlaneB
static ULONG	VramPlaneG
static ULONG	VramPlaneR
static ULONG	VramPlaneI
static const PALETTE_ENTRY	CgaPalette []

Macro Definition Documentation

BYTES_PER_SCANLINE

#define BYTES_PER_SCANLINE   (SCREEN_WIDTH / 8)

Definition at line 26 of file pc98video.c.

SCREEN_HEIGHT

#define SCREEN_HEIGHT   400

Definition at line 25 of file pc98video.c.

SCREEN_WIDTH

#define SCREEN_WIDTH   640

Definition at line 24 of file pc98video.c.

TEXT_CHAR_SIZE

#define TEXT_CHAR_SIZE   2

Definition at line 20 of file pc98video.c.

VGA_CHAR_SIZE

#define VGA_CHAR_SIZE   2

Definition at line 18 of file pc98video.c.

Function Documentation

Pc98AsciiToJisX()

static USHORT Pc98AsciiToJisX ( int  Ch )

static

Definition at line 278 of file pc98video.c.

{
    switch (Ch)
    {
        /* Only characters required for pseudographic are handled here */
        case 0x18: return 0x1E;
        case 0x19: return 0x1F;
        case 0xB3: return 0x260B;
        case 0xB6: return 0x4C0B;
        case 0xBA: return 0x270B;
        case 0xBB: return 0x370B;
        case 0xBC: return 0x3F0B;
        case 0xBF: return 0x340B;
        case 0xC0: return 0x380B;
        case 0xC4: return 0x240B;
        case 0xC7: return 0x440B;
        case 0xC8: return 0x3B0B;
        case 0xC9: return 0x330B;
        case 0xCD: return 0x250B;
        case 0xD9: return 0x3C0B;
        case 0xDA: return 0x300B;
        case 0xDB: return 0x87;
        default: return Ch;
    }
}

Referenced by Pc98VideoPutChar().

Pc98VideoAttrToGdcAttr()

static UCHAR Pc98VideoAttrToGdcAttr ( UCHAR  Attr )

static

Definition at line 243 of file pc98video.c.

{
    switch (Attr & 0xF)
    {
        case COLOR_BLACK:
            return GDC_ATTR_BLACK;
        case COLOR_BLUE:
            return GDC_ATTR_BLUE;
        case COLOR_GREEN:
        case COLOR_LIGHTGREEN:
            return GDC_ATTR_GREEN;
        case COLOR_CYAN:
        case COLOR_GRAY:
        case COLOR_DARKGRAY:
        case COLOR_WHITE:
            return GDC_ATTR_WHITE;
        case COLOR_RED:
        case COLOR_LIGHTRED:
            return GDC_ATTR_RED;
        case COLOR_MAGENTA:
        case COLOR_LIGHTMAGENTA:
            return GDC_ATTR_PURPLE;
        case COLOR_BROWN:
        case COLOR_YELLOW:
            return GDC_ATTR_YELLOW;
        case COLOR_LIGHTBLUE:
        case COLOR_LIGHTCYAN:
            return GDC_ATTR_LIGHTBLUE;
        default:
            return GDC_ATTR_BLACK;
    }
}

Referenced by Pc98VideoTextRamPutChar().

Pc98VideoClearScreen()

VOID Pc98VideoClearScreen

(

UCHAR

Attr

)

Definition at line 164 of file pc98video.c.

{
    USHORT i;
    USHORT B = (Attr & 0x10) ? 0xFFFF : 0;
    USHORT G = (Attr & 0x20) ? 0xFFFF : 0;
    USHORT R = (Attr & 0x40) ? 0xFFFF : 0;
    USHORT I = (Attr & 0x80) ? 0xFFFF : 0;
 
    for (i = 0; i < VRAM_TEXT_SIZE; i += TEXT_CHAR_SIZE)
        *(PUSHORT)(VramText + i) = ' ';
 
    for (i = 0; i < BYTES_PER_SCANLINE * SCREEN_HEIGHT; i += sizeof(USHORT))
    {
        *(PUSHORT)(VramPlaneB + i) = B;
        *(PUSHORT)(VramPlaneG + i) = G;
        *(PUSHORT)(VramPlaneR + i) = R;
        *(PUSHORT)(VramPlaneI + i) = I;
    }
}

Referenced by ChainLoadBiosBootSectorCode(), and MachInit().

Pc98VideoCopyOffScreenBufferToVRAM()

VOID Pc98VideoCopyOffScreenBufferToVRAM

(

PVOID

Buffer

)

Definition at line 381 of file pc98video.c.

{
    PUCHAR OffScreenBuffer = (PUCHAR)Buffer;
    USHORT X, Y;
 
    for (Y = 0; Y < SCREEN_HEIGHT / CHAR_HEIGHT; Y++)
    {
        for (X = 0; X < SCREEN_WIDTH / CHAR_WIDTH; X++)
        {
            Pc98VideoPutChar(OffScreenBuffer[0], OffScreenBuffer[1], X, Y);
            OffScreenBuffer += VGA_CHAR_SIZE;
        }
    }
}

Referenced by MachInit().

Pc98VideoGetBufferSize()

ULONG Pc98VideoGetBufferSize

(

VOID

)

Definition at line 200 of file pc98video.c.

{
    return (SCREEN_WIDTH / CHAR_WIDTH) * (SCREEN_HEIGHT / CHAR_HEIGHT) * VGA_CHAR_SIZE;
}

Referenced by MachInit().

Pc98VideoGetDisplaySize()

VOID Pc98VideoGetDisplaySize	(	PULONG	Width,
		PULONG	Height,
		PULONG	Depth
	)

Definition at line 192 of file pc98video.c.

{
    *Width = SCREEN_WIDTH / CHAR_WIDTH;
    *Height = SCREEN_HEIGHT / CHAR_HEIGHT;
    *Depth = 0;
}

Referenced by MachInit().

Pc98VideoGetFontsFromFirmware()

VOID Pc98VideoGetFontsFromFirmware

(

PULONG

RomFontPointers

)

Definition at line 206 of file pc98video.c.

{
    *RomFontPointers = VramText + 0x4000;
}

Referenced by MachInit().

Pc98VideoGetPaletteColor()

VOID Pc98VideoGetPaletteColor	(	UCHAR	Color,
		UCHAR *	Red,
		UCHAR *	Green,
		UCHAR *	Blue
	)

Definition at line 415 of file pc98video.c.

{
    if (Color < 16)
    {
        WRITE_PORT_UCHAR((PUCHAR)GDC2_IO_o_PALETTE_INDEX, Color);
        *Red = READ_PORT_UCHAR((PUCHAR)GDC2_IO_i_RED);
        *Green = READ_PORT_UCHAR((PUCHAR)GDC2_IO_i_GREEN);
        *Blue = READ_PORT_UCHAR((PUCHAR)GDC2_IO_i_BLUE);
    }
    else
    {
        *Red = 0;
        *Green = 0;
        *Blue = 0;
    }
}

Referenced by MachInit().

Pc98VideoHideShowTextCursor()

VOID Pc98VideoHideShowTextCursor

(

BOOLEAN

Show

)

Definition at line 225 of file pc98video.c.

{
    CSRFORMPARAM CursorParameters;
 
    RtlZeroMemory(&CursorParameters, sizeof(CSRFORMPARAM));
    CursorParameters.Show = Show;
    CursorParameters.Blink = TRUE;
    CursorParameters.BlinkRate = 12;
    CursorParameters.LinesPerRow = 16;
    CursorParameters.StartScanLine = 12;
    CursorParameters.EndScanLine = 15;
 
    WRITE_PORT_UCHAR((PUCHAR)GDC1_IO_o_COMMAND, GDC_COMMAND_CSRFORM);
    WRITE_GDC_CSRFORM((PUCHAR)GDC1_IO_o_PARAM, &CursorParameters);
}

Referenced by MachInit(), and Pc98VideoPrepareForReactOS().

Pc98VideoInit()

VOID Pc98VideoInit

(

VOID

)

Definition at line 66 of file pc98video.c.

{
    REGS Regs;
    USHORT i;
 
    if (HiResoMachine)
    {
        VramPlaneB = VRAM_HI_RESO_PLANE_B;
        VramPlaneG = VRAM_HI_RESO_PLANE_G;
        VramPlaneR = VRAM_HI_RESO_PLANE_R;
        VramPlaneI = VRAM_HI_RESO_PLANE_I;
        VramText = VRAM_HI_RESO_TEXT;
        TextCols = 80;
        TextLines = 31;
    }
    else
    {
        VramPlaneB = VRAM_NORMAL_PLANE_B;
        VramPlaneG = VRAM_NORMAL_PLANE_G;
        VramPlaneR = VRAM_NORMAL_PLANE_R;
        VramPlaneI = VRAM_NORMAL_PLANE_I;
        VramText = VRAM_NORMAL_TEXT;
        TextCols = 80;
        TextLines = 25;
    }
 
    for (i = 0; i < VRAM_ATTR_SIZE; i += TEXT_CHAR_SIZE)
        *(PUCHAR)(VramText + VRAM_TEXT_ATTR_OFFSET + i) = GDC_ATTR_WHITE | GDC_ATTR_VISIBLE;
 
    /* Int 18h AH=41h
     * CRT BIOS - Stop displaying graphics
     */
    Regs.b.ah = 0x41;
    Int386(0x18, &Regs, &Regs);
 
    /* Int 18h AH=42h
     * CRT BIOS - Set display area
     *
     * CH0-CH3 - always zero
     * CH4 - video page
     * CH5 - CRT display mode
     *    0 - color
     *    1 - monochrome
     * CH6-CH7 - VRAM area
     *    01 - Upper-half (16-32 kB), 640x200
     *    10 - Lower-half (0-16 kB), 640x200
     *    11 - All (0-32 kB), 640x400
     */
    Regs.b.ah = 0x42;
    Regs.b.ch = 0xC0;
    Int386(0x18, &Regs, &Regs); /* 640x400 */
 
    WRITE_PORT_UCHAR((PUCHAR)GDC2_IO_o_MODE_FLIPFLOP2, GDC2_MODE_COLORS_16);
    WRITE_PORT_UCHAR((PUCHAR)GDC2_IO_o_VIDEO_PAGE, 0);
    WRITE_PORT_UCHAR((PUCHAR)GDC2_IO_o_VIDEO_PAGE_ACCESS, 0);
 
    Pc98VideoSync();
    for (i = 0; i < RTL_NUMBER_OF(CgaPalette); i++)
        Pc98VideoSetPaletteColor(i, CgaPalette[i].Red, CgaPalette[i].Green, CgaPalette[i].Blue);
 
    /* Int 18h AH=0Ah
     * CRT BIOS - Set text screen mode
     *
     * AL0 - text rows
     *    0 - 25
     *    1 - 20
     * AL1 - text cols
     *    0 - 80
     *    1 - 40
     * AL2 - text attribute
     *    0 - with vertical line
     *    1 - normal
     * AL3 - KCG access mode
     *    0 - code
     *    1 - bitmap
     * AL4-AL7 - always zero
     *
     * High-resolution machine:
     * AL4 - text rows, AL3 - KCG access mode
     */
    Regs.b.ah = 0x0A;
    Regs.b.al = HiResoMachine ? 0x10 : 0x00;
    Int386(0x18, &Regs, &Regs); /* 80x25(31) */
 
    /* Int 18h AH=0Ch
     * CRT BIOS - Start displaying text
     */
    Regs.b.ah = 0x0C;
    Int386(0x18, &Regs, &Regs);
 
    /* Int 18h AH=40h
     * CRT BIOS - Start displaying graphics
     */
    Regs.b.ah = 0x40;
    Int386(0x18, &Regs, &Regs);
}

Referenced by MachInit().

Pc98VideoIsPaletteFixed()

BOOLEAN Pc98VideoIsPaletteFixed

(

VOID

)

Definition at line 397 of file pc98video.c.

{
    return FALSE;
}

Referenced by MachInit().

Pc98VideoPrepareForReactOS()

VOID Pc98VideoPrepareForReactOS

(

VOID

)

Definition at line 443 of file pc98video.c.

{
    REGS Regs;
 
    /* Int 18h AH=41h
     * CRT BIOS - Stop displaying graphics
     */
    Regs.b.ah = 0x41;
    Int386(0x18, &Regs, &Regs);
 
    Pc98VideoHideShowTextCursor(FALSE);
 
    if (UseCGFont && CGAccelDraw)
    {
        /* Clear the text screen, resetting to default attributes */
        for (USHORT i = 0; i < VRAM_TEXT_SIZE; i += TEXT_CHAR_SIZE)
        {
            *(PUSHORT)(VramText + i) = ' ';
            *(PUCHAR)(VramText + VRAM_TEXT_ATTR_OFFSET + i) = GDC_ATTR_WHITE | GDC_ATTR_VISIBLE;
        }
    }
}

Referenced by Pc98PrepareForReactOS().

Pc98VideoPutChar()

VOID Pc98VideoPutChar	(	int	Ch,
		UCHAR	Attr,
		unsigned	X,
		unsigned	Y
	)

Definition at line 313 of file pc98video.c.

{
    UCHAR Line;
    UCHAR B = (Attr & 0x10) ? 0xFF : 0;
    UCHAR G = (Attr & 0x20) ? 0xFF : 0;
    UCHAR R = (Attr & 0x40) ? 0xFF : 0;
    UCHAR I = (Attr & 0x80) ? 0xFF : 0;
    ULONG VramOffset = X + (Y * CHAR_HEIGHT) * BYTES_PER_SCANLINE;
    const UCHAR* FontPtr = BitmapFont8x16 + Ch * CHAR_HEIGHT;
    BOOLEAN CGFont = UseCGFont && (Ch != LIGHT_FILL && Ch != MEDIUM_FILL && Ch != DARK_FILL);
 
    if (CGFont)
    {
        Ch = Pc98AsciiToJisX(Ch);
 
        if (CGAccelDraw)
        {
            Pc98VideoTextRamPutChar(Ch, Attr, X, Y);
        }
        else
        {
            /* Set needed character code to obtain glyph from CG Window */
            WRITE_PORT_UCHAR((PUCHAR)KCG_IO_o_CHARCODE_LOW, Ch);
            WRITE_PORT_UCHAR((PUCHAR)KCG_IO_o_CHARCODE_HIGH, Ch >> 8);
        }
    }
    else if (UseCGFont && CGAccelDraw)
    {
        /* Clear character at this place in Text RAM */
        Pc98VideoTextRamPutChar(' ', Attr, X, Y);
    }
 
    for (Line = 0; Line < CHAR_HEIGHT; Line++)
    {
        UCHAR CharLine = FontPtr[Line];
        if (CGFont)
        {
            if (CGAccelDraw)
            {
                /* Character is already displayed by GDC (Text RAM),
                 * so display only background for it. */
                CharLine = 0;
            }
            else
            {
                /* Obtain glyph data from CG Window */
                WRITE_PORT_UCHAR((PUCHAR)KCG_IO_o_LINE, Line | 0x20);
                CharLine = READ_PORT_UCHAR((PUCHAR)KCG_IO_i_PATTERN);
            }
        }
        if (Attr & 0x0F)
        {
            *(PUCHAR)(VramPlaneB + VramOffset + Line * BYTES_PER_SCANLINE) = B | ((Attr & 0x01) ? CharLine : 0);
            *(PUCHAR)(VramPlaneG + VramOffset + Line * BYTES_PER_SCANLINE) = G | ((Attr & 0x02) ? CharLine : 0);
            *(PUCHAR)(VramPlaneR + VramOffset + Line * BYTES_PER_SCANLINE) = R | ((Attr & 0x04) ? CharLine : 0);
            *(PUCHAR)(VramPlaneI + VramOffset + Line * BYTES_PER_SCANLINE) = I | ((Attr & 0x08) ? CharLine : 0);
        }
        else
        {
            *(PUCHAR)(VramPlaneB + VramOffset + Line * BYTES_PER_SCANLINE) = B & ~CharLine;
            *(PUCHAR)(VramPlaneG + VramOffset + Line * BYTES_PER_SCANLINE) = G & ~CharLine;
            *(PUCHAR)(VramPlaneR + VramOffset + Line * BYTES_PER_SCANLINE) = R & ~CharLine;
            *(PUCHAR)(VramPlaneI + VramOffset + Line * BYTES_PER_SCANLINE) = I & ~CharLine;
        }
    }
}

Referenced by MachInit(), and Pc98VideoCopyOffScreenBufferToVRAM().

Pc98VideoSetDisplayMode()

VIDEODISPLAYMODE Pc98VideoSetDisplayMode	(	PCSTR	DisplayModeName,
		BOOLEAN	Init
	)

Definition at line 185 of file pc98video.c.

{
    /* Not supported by hardware */
    return VideoTextMode;
}

Referenced by MachInit().

Pc98VideoSetPaletteColor()

VOID Pc98VideoSetPaletteColor	(	UCHAR	Color,
		UCHAR	Red,
		UCHAR	Green,
		UCHAR	Blue
	)

Definition at line 403 of file pc98video.c.

{
    if (Color < 16)
    {
        WRITE_PORT_UCHAR((PUCHAR)GDC2_IO_o_PALETTE_INDEX, Color);
        WRITE_PORT_UCHAR((PUCHAR)GDC2_IO_o_RED, Red);
        WRITE_PORT_UCHAR((PUCHAR)GDC2_IO_o_GREEN, Green);
        WRITE_PORT_UCHAR((PUCHAR)GDC2_IO_o_BLUE, Blue);
    }
}

Referenced by MachInit(), and Pc98VideoInit().

Pc98VideoSetTextCursorPosition()

VOID Pc98VideoSetTextCursorPosition	(	UCHAR	X,
		UCHAR	Y
	)

Definition at line 212 of file pc98video.c.

{
    CSRWPARAM CursorParameters;
 
    RtlZeroMemory(&CursorParameters, sizeof(CSRWPARAM));
    CursorParameters.CursorAddress = X + Y * TextCols;
    CursorParameters.DotAddress = 0;
 
    WRITE_PORT_UCHAR((PUCHAR)GDC1_IO_o_COMMAND, GDC_COMMAND_CSRW);
    WRITE_GDC_CSRW((PUCHAR)GDC1_IO_o_PARAM, &CursorParameters);
}

Referenced by MachInit().

Pc98VideoSync()

VOID Pc98VideoSync

(

VOID

)

Definition at line 433 of file pc98video.c.

{
    while (READ_PORT_UCHAR((PUCHAR)GDC2_IO_i_STATUS) & GDC_STATUS_VSYNC)
        NOTHING;
 
    while (!(READ_PORT_UCHAR((PUCHAR)GDC2_IO_i_STATUS) & GDC_STATUS_VSYNC))
        NOTHING;
}

Referenced by MachInit(), and Pc98VideoInit().

Pc98VideoTextRamPutChar()

static VOID Pc98VideoTextRamPutChar ( int  Ch, UCHAR  Attr, unsigned  X, unsigned  Y  )

static

Definition at line 306 of file pc98video.c.

{
    *(PUSHORT)(VramText + (X + Y * TextCols) * TEXT_CHAR_SIZE) = Ch;
    *(PUCHAR)(VramText + VRAM_TEXT_ATTR_OFFSET + (X + Y * TextCols) * TEXT_CHAR_SIZE) = Pc98VideoAttrToGdcAttr(Attr) | GDC_ATTR_VISIBLE;
}

Referenced by Pc98VideoPutChar().

Variable Documentation

CGAccelDraw

BOOLEAN CGAccelDraw = TRUE

static

Definition at line 33 of file pc98video.c.

Referenced by Pc98VideoPrepareForReactOS(), and Pc98VideoPutChar().

CgaPalette

const PALETTE_ENTRY CgaPalette[]

static

Initial value:

=
{
    {0x00, 0x00, 0x00},
    {0x00, 0x00, 0x0A},
    {0x00, 0x0A, 0x00},
    {0x00, 0x0A, 0x0A},
    {0x0A, 0x00, 0x00},
    {0x0A, 0x00, 0x0A},
    {0x0A, 0x05, 0x00},
    {0x0A, 0x0A, 0x0A},
    {0x05, 0x05, 0x05},
    {0x05, 0x05, 0x0F},
    {0x05, 0x0F, 0x05},
    {0x05, 0x0F, 0x0F},
    {0x0F, 0x05, 0x05},
    {0x0F, 0x05, 0x0F},
    {0x0F, 0x0F, 0x05},
    {0x0F, 0x0F, 0x0F}
}

Definition at line 43 of file pc98video.c.

Referenced by Pc98VideoInit().

HiResoMachine

BOOLEAN HiResoMachine

extern

Definition at line 17 of file machpc98.c.

Referenced by MachInit(), Pc98GetExtendedBIOSData(), and Pc98VideoInit().

MachDefaultTextColor

UCHAR MachDefaultTextColor = COLOR_WHITE

Definition at line 35 of file pc98video.c.

TextCols

UCHAR TextCols

Definition at line 21 of file pc98video.c.

Referenced by Pc98ConsPutChar(), Pc98VideoInit(), Pc98VideoSetTextCursorPosition(), and Pc98VideoTextRamPutChar().

TextLines

UCHAR TextLines

Definition at line 22 of file pc98video.c.

Referenced by Pc98ConsPutChar(), and Pc98VideoInit().

UseCGFont

BOOLEAN UseCGFont = TRUE

static

Definition at line 29 of file pc98video.c.

Referenced by Pc98VideoPrepareForReactOS(), and Pc98VideoPutChar().

VramPlaneB

ULONG VramPlaneB

static

Definition at line 38 of file pc98video.c.

Referenced by Pc98VideoClearScreen(), Pc98VideoInit(), and Pc98VideoPutChar().

VramPlaneG

ULONG VramPlaneG

static

Definition at line 39 of file pc98video.c.

Referenced by Pc98VideoClearScreen(), Pc98VideoInit(), and Pc98VideoPutChar().

VramPlaneI

ULONG VramPlaneI

static

Definition at line 41 of file pc98video.c.

Referenced by Pc98VideoClearScreen(), Pc98VideoInit(), and Pc98VideoPutChar().

VramPlaneR

ULONG VramPlaneR

static

Definition at line 40 of file pc98video.c.

Referenced by Pc98VideoClearScreen(), Pc98VideoInit(), and Pc98VideoPutChar().

VramText

ULONG VramText

Definition at line 37 of file pc98video.c.

Referenced by Pc98ConsPutChar(), Pc98VideoClearScreen(), Pc98VideoGetFontsFromFirmware(), Pc98VideoInit(), Pc98VideoPrepareForReactOS(), and Pc98VideoTextRamPutChar().