vga.c File Reference

#include "remods.h"
#include "precomp.h"

Include dependency graph for vga.c:

Go to the source code of this file.

Classes
struct	_attr

Macros
#define	VGA_EXTENDED
#define	SCREEN_BUFFER_SIZE   (80*50*2)
#define	MISCOUTPUT   0x3c2
#define	FEATURECONTROL   0x3da
#define	SEQUENCER   0x3c4
#define	CRTC   0x03d4
#define	GRAPHICS   0x3ce
#define	ATTRIBS   0x03c0
#define	PELADDRESSWRITE   0x3c8
#define	PELDATAREG   0x3c9
#define	MAXSEQ   5
#define	MAXCRTC   0x19
#define	MAXGRAPH   0x9
#define	MAXATTRIB   0x015
#define	VREND   0x11
#define	GRREGSETRESET   0
#define	GRREGENABLESETRESET   1
#define	GRREGREADMAPSEL   4
#define	SQREGMAPMASK   2
#define	SQREGMEMORY   4
#define	GRREGWRMODE   5
#define	GRREGMISC   6
#define	BYTESPERFONT   8
#define	FONTENTRIES   256
#define	FONTBUFFERSIZE   8192

Functions
void	pice_save_current_registers (void)
void	pice_restore_current_registers (void)
void	pice_set_mode_3_80x50 (void)
void	pice_set_mode_3_80x25 (void)
unsigned char	read_vga_reg (int port, int reg)
void	write_vga_reg (int port, unsigned char reg, unsigned char value)
void	map_font_memory (void)
void	unmap_font_memory (void)
void	save_font (UCHAR *graph_table)
void	load_font (UCHAR *graph_table, int bEnter)
void	SetForegroundColorVga (ECOLORS col)
void	SetBackgroundColorVga (ECOLORS col)
void	PrintGrafVga (ULONG x, ULONG y, UCHAR c)
void	ShowCursorVga (void)
void	HideCursorVga (void)
void	CopyLineToVga (USHORT dest, USHORT src)
void	InvertLineVga (ULONG line)
void	HatchLineVga (ULONG line)
void	ClrLineVga (ULONG line)
void	PrintLogoVga (BOOLEAN bShow)
void	PrintCursorVga (BOOLEAN bForce)
void	SaveGraphicsStateVga (void)
void	RestoreGraphicsStateVga (void)
BOOLEAN	ConsoleInitVga (void)
void	ConsoleShutdownVga (void)

Variables
UCHAR	cGraphTable [8 *256]
UCHAR	cGraphTable2 [16 *256]
WINDOW	wWindowVga [4]
PUCHAR	pScreenBufferVga
PUCHAR	pScreenBufferSaveVga = NULL
PUCHAR	pScreenBufferTempVga
PUCHAR	pScreenBufferHardwareVga
PUCHAR	pFontBufferVga = NULL
UCHAR	offset_a = 0
UCHAR	offset_c = 0
UCHAR	offset_d = 0
UCHAR	offset_e = 0
UCHAR	offset_f = 0
struct _attr	attr
unsigned char	oldgraphicsmode
unsigned char	oldgraphicsmisc
unsigned char	oldsqregmapmask
unsigned char	oldsqregmemory
unsigned char	oldgraphicssetresetenable
unsigned char	oldgraphicsreadmapsel

Macro Definition Documentation

ATTRIBS

#define ATTRIBS   0x03c0

Definition at line 73 of file vga.c.

BYTESPERFONT

#define BYTESPERFONT   8

Definition at line 194 of file vga.c.

CRTC

#define CRTC   0x03d4

Definition at line 71 of file vga.c.

FEATURECONTROL

#define FEATURECONTROL   0x3da

Definition at line 69 of file vga.c.

FONTBUFFERSIZE

#define FONTBUFFERSIZE   8192

Definition at line 196 of file vga.c.

FONTENTRIES

#define FONTENTRIES   256

Definition at line 195 of file vga.c.

GRAPHICS

#define GRAPHICS   0x3ce

Definition at line 72 of file vga.c.

GRREGENABLESETRESET

#define GRREGENABLESETRESET   1

Definition at line 152 of file vga.c.

GRREGMISC

#define GRREGMISC   6

Definition at line 157 of file vga.c.

GRREGREADMAPSEL

#define GRREGREADMAPSEL   4

Definition at line 153 of file vga.c.

GRREGSETRESET

#define GRREGSETRESET   0

Definition at line 151 of file vga.c.

GRREGWRMODE

#define GRREGWRMODE   5

Definition at line 156 of file vga.c.

MAXATTRIB

#define MAXATTRIB   0x015

Definition at line 82 of file vga.c.

MAXCRTC

#define MAXCRTC   0x19

Definition at line 80 of file vga.c.

MAXGRAPH

#define MAXGRAPH   0x9

Definition at line 81 of file vga.c.

MAXSEQ

#define MAXSEQ   5

Definition at line 79 of file vga.c.

MISCOUTPUT

#define MISCOUTPUT   0x3c2

Definition at line 68 of file vga.c.

PELADDRESSWRITE

#define PELADDRESSWRITE   0x3c8

Definition at line 74 of file vga.c.

PELDATAREG

#define PELDATAREG   0x3c9

Definition at line 75 of file vga.c.

SCREEN_BUFFER_SIZE

#define SCREEN_BUFFER_SIZE   (80*50*2)

Definition at line 64 of file vga.c.

SEQUENCER

#define SEQUENCER   0x3c4

Definition at line 70 of file vga.c.

SQREGMAPMASK

#define SQREGMAPMASK   2

Definition at line 154 of file vga.c.

SQREGMEMORY

#define SQREGMEMORY   4

Definition at line 155 of file vga.c.

VGA_EXTENDED

#define VGA_EXTENDED

Definition at line 59 of file vga.c.

VREND

#define VREND   0x11

Definition at line 150 of file vga.c.

Function Documentation

ClrLineVga()

void ClrLineVga

(

ULONG

line

)

Definition at line 360 of file vga.c.

{
    ULONG i;
    PUSHORT p = (PUSHORT)pScreenBufferVga;

    if(line < GLOBAL_SCREEN_HEIGHT)
    {
        for(i=0;i<GLOBAL_SCREEN_WIDTH;i++)
            p[line*GLOBAL_SCREEN_WIDTH + i] = (USHORT)((attr.u.Asuchar<<8) | 0x20);
    }
}

Referenced by ConsoleInitVga().

ConsoleInitVga()

BOOLEAN ConsoleInitVga

(

void

)

Definition at line 479 of file vga.c.

{
    BOOLEAN bResult = FALSE;
    PUSHORT p;
    PHYSICAL_ADDRESS FrameBuffer;
    PHYSICAL_ADDRESS FontBuffer;


    ENTER_FUNC();

    ohandlers.CopyLineTo            = CopyLineToVga;
    ohandlers.PrintGraf             = PrintGrafVga;
    ohandlers.ClrLine               = ClrLineVga;
    ohandlers.InvertLine            = InvertLineVga;
    ohandlers.HatchLine             = HatchLineVga;
    ohandlers.PrintLogo             = PrintLogoVga;
    ohandlers.PrintCursor           = PrintCursorVga;
    ohandlers.SaveGraphicsState     = SaveGraphicsStateVga;
    ohandlers.RestoreGraphicsState  = RestoreGraphicsStateVga;
    ohandlers.ShowCursor            = ShowCursorVga;
    ohandlers.HideCursor            = HideCursorVga;
    ohandlers.SetForegroundColor    = SetForegroundColorVga;
    ohandlers.SetBackgroundColor    = SetBackgroundColorVga;

    ihandlers.GetKeyPolled          = KeyboardGetKeyPolled;
    ihandlers.FlushKeyboardQueue    = KeyboardFlushKeyboardQueue;

    SetWindowGeometry(wWindowVga);

    GLOBAL_SCREEN_WIDTH = 80;
#ifndef VGA_EXTENDED
    GLOBAL_SCREEN_HEIGHT = 25;
#else // VGA_EXTENDED
    GLOBAL_SCREEN_HEIGHT = 50;
#endif // VGA_EXTENDED

    attr.u.Asuchar = 0x07;

    // the real framebuffer
    FrameBuffer.u.LowPart = 0xB8000;
    pScreenBufferHardwareVga = MmMapIoSpace(FrameBuffer,SCREEN_BUFFER_SIZE,MmNonCached);

    //The real font buffer
    FontBuffer.u.LowPart = 0xA0000;
    pFontBufferVga = MmMapIoSpace(FontBuffer,FONTBUFFERSIZE,MmNonCached);

    // the console
    pScreenBufferVga = PICE_malloc(SCREEN_BUFFER_SIZE,NONPAGEDPOOL);
    // the save area
    pScreenBufferTempVga = PICE_malloc(SCREEN_BUFFER_SIZE,NONPAGEDPOOL);

    if(pScreenBufferVga)
    {
        DPRINT((0,"VGA memory phys. 0x000b0000 mapped to virt. 0x%x\n",pScreenBufferVga));

        bResult = TRUE;

        p = (PUSHORT)pScreenBufferVga;

        PICE_memset(pScreenBufferVga,0x0,SCREEN_BUFFER_SIZE);

        DPRINT((0,"VGA memory cleared!\n"));

        EmptyRingBuffer();

        DPRINT((0,"ConsoleInitVga() SUCCESS!\n"));
    }

    LEAVE_FUNC();

    return bResult;
}

Referenced by ConsoleInit().

ConsoleShutdownVga()

void ConsoleShutdownVga

(

void

)

Definition at line 557 of file vga.c.

{
    ENTER_FUNC();

    if(pScreenBufferVga)
    {
        PICE_free(pScreenBufferVga);
        PICE_free(pScreenBufferTempVga);
        MmUnmapIoSpace(pScreenBufferHardwareVga,SCREEN_BUFFER_SIZE);
        MmUnmapIoSpace(pFontBufferVga,FONTBUFFERSIZE);
    }

    LEAVE_FUNC();
}

Referenced by ConsoleShutdown().

CopyLineToVga()

void CopyLineToVga	(	USHORT	dest,
		USHORT	src
	)

Definition at line 306 of file vga.c.

{
    PUSHORT p = (PUSHORT)pScreenBufferVga;

    ENTER_FUNC();

    PICE_memcpy(&p[dest*GLOBAL_SCREEN_WIDTH],&p[src*GLOBAL_SCREEN_WIDTH],GLOBAL_SCREEN_WIDTH*sizeof(USHORT));

    LEAVE_FUNC();
}

Referenced by ConsoleInitVga().

HatchLineVga()

void HatchLineVga

(

ULONG

line

)

Definition at line 343 of file vga.c.

{
    ULONG i;
    PUSHORT p = (PUSHORT)pScreenBufferVga;

    if(line < GLOBAL_SCREEN_HEIGHT)
    {
        for(i=0;i<GLOBAL_SCREEN_WIDTH;i++)
            p[line*GLOBAL_SCREEN_WIDTH + i] = (p[line*GLOBAL_SCREEN_WIDTH + i] & 0xF0FF) | 0x0c00;
    }
}

Referenced by ConsoleInitVga().

HideCursorVga()

void HideCursorVga

(

void

)

Definition at line 290 of file vga.c.

{
    ENTER_FUNC();
    bCursorEnabled=FALSE;

    outb_p(0x0a,0x3d4);
    outb_p(inb_p(0x3d5)|0x20,0x3d5);

    LEAVE_FUNC();
}

Referenced by ConsoleInitVga().

InvertLineVga()

void InvertLineVga

(

ULONG

line

)

Definition at line 322 of file vga.c.

{
    ULONG i;
    PUSHORT p = (PUSHORT)pScreenBufferVga;
    USHORT attr;

    if(line < GLOBAL_SCREEN_HEIGHT)
    {
        attr = p[line*GLOBAL_SCREEN_WIDTH]>>8;
        attr = ((attr & 0x07)<<4) | ((attr & 0xF0)>>4);
        attr <<= 8;
        for(i=0;i<GLOBAL_SCREEN_WIDTH;i++)
            p[line*GLOBAL_SCREEN_WIDTH + i] = (p[line*GLOBAL_SCREEN_WIDTH + i] & 0x00FF) | attr;
    }
}

Referenced by ConsoleInitVga().

load_font()

void load_font	(	UCHAR *	graph_table,
		int	bEnter
	)

Definition at line 211 of file vga.c.

{
    PUCHAR FontBase = pFontBufferVga;
    int i,j;
    map_font_memory();

    if(bEnter)
    {
#ifdef VGA_EXTENDED
        for (i=0; i < FONTENTRIES; i++)
            for (j=0; j < 8; j++)
                    FontBase[i*32+j] = graph_table[i*BYTESPERFONT+j];
#else // VGA_EXTENDED
        for (i=0; i < FONTENTRIES; i++)
            for (j=0; j < 16; j++)
                    FontBase[i*32+j] = graph_table[i*BYTESPERFONT+(j/2)] << (j&1);
#endif // VGA_EXTENDED
    }
    else
    {
        for (i=0; i < FONTENTRIES; i++)
            for (j=0; j < 16; j++)
                    FontBase[i*32+j] = graph_table[i*16+j];
    }

    unmap_font_memory();
}

Referenced by RestoreGraphicsStateVga(), and SaveGraphicsStateVga().

map_font_memory()

void map_font_memory

(

void

)

Definition at line 159 of file vga.c.

{
    oldgraphicssetresetenable = read_vga_reg(GRAPHICS, GRREGENABLESETRESET);
    oldgraphicsmode = read_vga_reg(GRAPHICS, GRREGWRMODE);
    oldgraphicsmisc = read_vga_reg(GRAPHICS, GRREGMISC);
    oldgraphicsreadmapsel = read_vga_reg(GRAPHICS, GRREGREADMAPSEL);
    oldsqregmapmask = read_vga_reg(SEQUENCER, SQREGMAPMASK);
    oldsqregmemory = read_vga_reg(SEQUENCER, SQREGMEMORY);


    /* Make sure set/reset enable is off */
    write_vga_reg(GRAPHICS,GRREGENABLESETRESET,0);
    /* Select read plane 2 */
    write_vga_reg(GRAPHICS,GRREGREADMAPSEL,0x02);
    /* Make sure write and read mode = 0 */
    write_vga_reg(GRAPHICS,GRREGWRMODE,0x00);
    /* Set mapping to 64K at a000:0 & turn off odd/even at the graphics reg */
    write_vga_reg(GRAPHICS,GRREGMISC, 0x04);
    /* Set sequencer plane to 2 */
    write_vga_reg(SEQUENCER,SQREGMAPMASK, 0x04);
    /* Turn off odd/even at the sequencer */
    write_vga_reg(SEQUENCER,SQREGMEMORY, 0x07);
}

Referenced by load_font(), and save_font().

pice_restore_current_registers()

void pice_restore_current_registers

(

void

)

Referenced by RestoreGraphicsStateVga().

pice_save_current_registers()

void pice_save_current_registers

(

void

)

Referenced by SaveGraphicsStateVga().

pice_set_mode_3_80x25()

void pice_set_mode_3_80x25

(

void

)

Referenced by SaveGraphicsStateVga().

pice_set_mode_3_80x50()

void pice_set_mode_3_80x50

(

void

)

Referenced by SaveGraphicsStateVga().

PrintCursorVga()

void PrintCursorVga

(

BOOLEAN

bForce

)

Definition at line 386 of file vga.c.

{
    static ULONG count=0;
    USHORT charoffset;
    UCHAR data;
    ULONG x=wWindow[OUTPUT_WINDOW].usCurX,y=wWindow[OUTPUT_WINDOW].y+wWindow[OUTPUT_WINDOW].usCurY;

    if( count++>250 )
    {
        count=0;

        charoffset = (y* GLOBAL_SCREEN_WIDTH + x);

        outb_p(0x0e,0x3d4);
        data=(UCHAR)((charoffset>>8)&0xFF);
        outb_p(data,0x3d5);

        outb_p(0x0f,0x3d4);
        data=(UCHAR)(charoffset & 0xFF);
        outb_p(data,0x3d5);
    }
}

Referenced by ConsoleInitVga().

PrintGrafVga()

void PrintGrafVga	(	ULONG	x,
		ULONG	y,
		UCHAR	c
	)

Definition at line 263 of file vga.c.

{
    ((PUSHORT)pScreenBufferVga)[y*GLOBAL_SCREEN_WIDTH + x] = (USHORT)((attr.u.Asuchar<<8)|c);
}

Referenced by ConsoleInitVga().

PrintLogoVga()

void PrintLogoVga

(

BOOLEAN

bShow

)

Definition at line 376 of file vga.c.

{
    NOT_IMPLEMENTED();
}

Referenced by ConsoleInitVga().

read_vga_reg()

unsigned char read_vga_reg	(	int	port,
		int	reg
	)

Definition at line 137 of file vga.c.

{
  outportb(port,reg);
  return(inportb(port+1));
}

Referenced by map_font_memory().

RestoreGraphicsStateVga()

void RestoreGraphicsStateVga

(

void

)

Definition at line 452 of file vga.c.

{
    UCHAR data;

    // unprotect crtc regs 0-7
    outb_p(0x11,0x3d4);
    data = inb_p(0x3d5);
    outb_p(data & 0x7F,0x3d5);

    // restore original regs
    pice_restore_current_registers();

    // load a font
    load_font(cGraphTable2,0);

    pScreenBufferVga = pScreenBufferSaveVga;
    // copy screen to the console
    PICE_memcpy(pScreenBufferVga,pScreenBufferHardwareVga,SCREEN_BUFFER_SIZE);
    // copy the temp area to the screen
    PICE_memcpy(pScreenBufferHardwareVga,pScreenBufferTempVga,SCREEN_BUFFER_SIZE);
}

Referenced by ConsoleInitVga().

save_font()

void save_font

(

UCHAR *

graph_table

)

Definition at line 198 of file vga.c.

{
    PUCHAR FontBase = pFontBufferVga;
    int i,j;
    map_font_memory();

    for (i=0; i < FONTENTRIES; i++)
        for (j=0; j < 16; j++)
                graph_table[i*16+j] = FontBase[i*32+j];

    unmap_font_memory();
}

Referenced by SaveGraphicsStateVga().

SaveGraphicsStateVga()

void SaveGraphicsStateVga

(

void

)

Definition at line 413 of file vga.c.

{
    UCHAR data;

    // save current regs
    pice_save_current_registers();

    // unprotect crtc regs 0-7
    outb_p(0x11,0x3d4);
    data = inb_p(0x3d5);
    outb_p(data & 0x7F,0x3d5);

    // save current font
    save_font(cGraphTable2);

    // restore original regs
#ifdef VGA_EXTENDED
    pice_set_mode_3_80x50();
#else
    pice_set_mode_3_80x25();
#endif

    // load a font
    load_font(cGraphTable,1);

    // copy the screen content to temp area
    PICE_memcpy(pScreenBufferTempVga,pScreenBufferHardwareVga,SCREEN_BUFFER_SIZE);
    // copy the console to the screen
    PICE_memcpy(pScreenBufferHardwareVga,pScreenBufferVga,SCREEN_BUFFER_SIZE);
    // save original pointer
    pScreenBufferSaveVga = pScreenBufferVga;
    // pScreenBufferVga now points to screen
    pScreenBufferVga = pScreenBufferHardwareVga;
}

Referenced by ConsoleInitVga().

SetBackgroundColorVga()

void SetBackgroundColorVga

(

ECOLORS

col

)

Definition at line 253 of file vga.c.

{
    attr.u.bits.bkcol = col;
    attr.u.bits.blink = 0;
}

Referenced by ConsoleInitVga().

SetForegroundColorVga()

void SetForegroundColorVga

(

ECOLORS

col

)

Definition at line 243 of file vga.c.

{
    attr.u.bits.fgcol = col;
    attr.u.bits.blink = 0;
}

Referenced by ConsoleInitVga().

ShowCursorVga()

void ShowCursorVga

(

void

)

Definition at line 273 of file vga.c.

{
    ENTER_FUNC();

    bCursorEnabled=TRUE;

    outb_p(0x0a,0x3d4);
    outb_p(inb_p(0x3d5)&~0x20,0x3d5);

    LEAVE_FUNC();
}

Referenced by ConsoleInitVga().

unmap_font_memory()

void unmap_font_memory

(

void

)

Definition at line 183 of file vga.c.

{
    write_vga_reg(GRAPHICS,GRREGENABLESETRESET,oldgraphicssetresetenable);
    write_vga_reg(GRAPHICS,GRREGWRMODE,oldgraphicsmode);
    write_vga_reg(GRAPHICS,GRREGREADMAPSEL,oldgraphicsreadmapsel);
    write_vga_reg(GRAPHICS,GRREGMISC, oldgraphicsmisc);
    write_vga_reg(SEQUENCER,SQREGMAPMASK, oldsqregmapmask);
    write_vga_reg(SEQUENCER,SQREGMEMORY, oldsqregmemory);
}

Referenced by load_font(), and save_font().

write_vga_reg()

void write_vga_reg	(	int	port,
		unsigned char	reg,
		unsigned char	value
	)

Definition at line 143 of file vga.c.

{
    outportb(port,reg);
    outportb(port+1,value);
}

Referenced by map_font_memory(), and unmap_font_memory().

Variable Documentation

attr

struct _attr attr

Referenced by InvertLineVga().

cGraphTable

UCHAR cGraphTable[8 *256]

Definition at line 3 of file charset.h.

Referenced by PrintGrafHercules(), and SaveGraphicsStateVga().

cGraphTable2

UCHAR cGraphTable2[16 *256]

Definition at line 54 of file vga.c.

Referenced by RestoreGraphicsStateVga(), and SaveGraphicsStateVga().

offset_a

UCHAR offset_a = 0

Definition at line 111 of file vga.c.

offset_c

UCHAR offset_c = 0

Definition at line 112 of file vga.c.

offset_d

UCHAR offset_d = 0

Definition at line 112 of file vga.c.

offset_e

UCHAR offset_e = 0

Definition at line 113 of file vga.c.

offset_f

UCHAR offset_f = 0

Definition at line 113 of file vga.c.

oldgraphicsmisc

unsigned char oldgraphicsmisc

Definition at line 131 of file vga.c.

Referenced by map_font_memory(), and unmap_font_memory().

oldgraphicsmode

unsigned char oldgraphicsmode

Definition at line 130 of file vga.c.

Referenced by map_font_memory(), and unmap_font_memory().

oldgraphicsreadmapsel

unsigned char oldgraphicsreadmapsel

Definition at line 135 of file vga.c.

Referenced by map_font_memory(), and unmap_font_memory().

oldgraphicssetresetenable

unsigned char oldgraphicssetresetenable

Definition at line 134 of file vga.c.

Referenced by map_font_memory(), and unmap_font_memory().

oldsqregmapmask

unsigned char oldsqregmapmask

Definition at line 132 of file vga.c.

Referenced by map_font_memory(), and unmap_font_memory().

oldsqregmemory

unsigned char oldsqregmemory

Definition at line 133 of file vga.c.

Referenced by map_font_memory(), and unmap_font_memory().

pFontBufferVga

PUCHAR pFontBufferVga = NULL

Definition at line 109 of file vga.c.

Referenced by ConsoleInitVga(), ConsoleShutdownVga(), load_font(), and save_font().

pScreenBufferHardwareVga

PUCHAR pScreenBufferHardwareVga

Definition at line 108 of file vga.c.

Referenced by ConsoleInitVga(), ConsoleShutdownVga(), RestoreGraphicsStateVga(), and SaveGraphicsStateVga().

pScreenBufferSaveVga

PUCHAR pScreenBufferSaveVga = NULL

Definition at line 106 of file vga.c.

Referenced by RestoreGraphicsStateVga(), and SaveGraphicsStateVga().

pScreenBufferTempVga

PUCHAR pScreenBufferTempVga

Definition at line 107 of file vga.c.

Referenced by ConsoleInitVga(), ConsoleShutdownVga(), RestoreGraphicsStateVga(), and SaveGraphicsStateVga().

pScreenBufferVga

PUCHAR pScreenBufferVga

Definition at line 105 of file vga.c.

Referenced by ClrLineVga(), ConsoleInitVga(), ConsoleShutdownVga(), CopyLineToVga(), HatchLineVga(), InvertLineVga(), PrintGrafVga(), RestoreGraphicsStateVga(), and SaveGraphicsStateVga().

wWindowVga

WINDOW wWindowVga[4]

Initial value:

=







 
{
    {1,3,1,0,FALSE},
    {5,4,1,0,FALSE},
    {10,24,1,0,FALSE},
    {35,14,1,0,FALSE}
}

Definition at line 88 of file vga.c.

Referenced by ConsoleInitVga().