vgacons.h File Reference

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Macros
#define	SCREEN_CONSOLE   1
#define	SCREEN_KLOG   2
#define	SCREEN_KDEBUG   3
#define	SCREEN_EXTRA   4
#define	MAX_SCREENS   4
#define	COLOR_BLACK   0
#define	COLOR_BLUE   1
#define	COLOR_DARKGRAY   2
#define	COLOR_LIGHTBLUE   3
#define	COLOR_RED   4
#define	COLOR_MAGENTA   5
#define	COLOR_LIGHTRED   6
#define	COLOR_LIGHTMAGENTA   7
#define	COLOR_GREEN   8
#define	COLOR_CYAN   9
#define	COLOR_LIGHTGREEN   10
#define	COLOR_LIGHTCYAN   11
#define	COLOR_BROWN   12
#define	COLOR_LIGHTGREY   13
#define	COLOR_YELLOW   14
#define	COLOR_WHITE   15

Functions
void	VGA_Init (void)
void	VGA_LateInit (void)
void	VGA_SwitchTo (int screen)
void	VGA_LoadFont (void *fontBuffer, int maxLength)
void	VGA_SaveFont (void *fontBuffer, int maxLength)
void	VGA_ClearDisplay (void)
void	VGA_ScollDisplay (void)
void	VGA_Putc (short ch)
void	VGA_Puts (const char *str)
void	Panic (const char *str)

Macro Definition Documentation

COLOR_BLACK

#define COLOR_BLACK   0

Definition at line 17 of file vgacons.h.

COLOR_BLUE

#define COLOR_BLUE   1

Definition at line 18 of file vgacons.h.

COLOR_BROWN

#define COLOR_BROWN   12

Definition at line 29 of file vgacons.h.

COLOR_CYAN

#define COLOR_CYAN   9

Definition at line 26 of file vgacons.h.

COLOR_DARKGRAY

#define COLOR_DARKGRAY   2

Definition at line 19 of file vgacons.h.

COLOR_GREEN

#define COLOR_GREEN   8

Definition at line 25 of file vgacons.h.

COLOR_LIGHTBLUE

#define COLOR_LIGHTBLUE   3

Definition at line 20 of file vgacons.h.

COLOR_LIGHTCYAN

#define COLOR_LIGHTCYAN   11

Definition at line 28 of file vgacons.h.

COLOR_LIGHTGREEN

#define COLOR_LIGHTGREEN   10

Definition at line 27 of file vgacons.h.

COLOR_LIGHTGREY

#define COLOR_LIGHTGREY   13

Definition at line 30 of file vgacons.h.

COLOR_LIGHTMAGENTA

#define COLOR_LIGHTMAGENTA   7

Definition at line 24 of file vgacons.h.

COLOR_LIGHTRED

#define COLOR_LIGHTRED   6

Definition at line 23 of file vgacons.h.

COLOR_MAGENTA

#define COLOR_MAGENTA   5

Definition at line 22 of file vgacons.h.

COLOR_RED

#define COLOR_RED   4

Definition at line 21 of file vgacons.h.

COLOR_WHITE

#define COLOR_WHITE   15

Definition at line 32 of file vgacons.h.

COLOR_YELLOW

#define COLOR_YELLOW   14

Definition at line 31 of file vgacons.h.

MAX_SCREENS

#define MAX_SCREENS   4

Definition at line 15 of file vgacons.h.

SCREEN_CONSOLE

#define SCREEN_CONSOLE   1

Definition at line 11 of file vgacons.h.

SCREEN_EXTRA

#define SCREEN_EXTRA   4

Definition at line 14 of file vgacons.h.

SCREEN_KDEBUG

#define SCREEN_KDEBUG   3

Definition at line 13 of file vgacons.h.

SCREEN_KLOG

#define SCREEN_KLOG   2

Definition at line 12 of file vgacons.h.

Function Documentation

Panic()

void Panic

(

const char *

str

)

Definition at line 164 of file vgacons.c.

{
    VGA_Puts(str);
    __asm__("int3");
    while (1)
    {
        __asm__("hlt");
    }
}

VGA_ClearDisplay()

void VGA_ClearDisplay

(

void

)

VGA_Init()

void VGA_Init

(

void

)

Definition at line 75 of file vgacons.c.

{
    int i = 0;
 
    for (i = 0;i < SizeX * SizeY;i++)
    {
        VideoBuffer[i] = (TextAttribute << 8) | ' ';
    }
 
    CurrentX = 0;
    CurrentY = 0;
 
    /*
     * At initialization the video memory is located at 0xB8000.
     * We will map the memory after memory management has been
     * initialized.
     */
}

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VGA_LateInit()

void VGA_LateInit

(

void

)

Definition at line 94 of file vgacons.c.

{
    // Map in video memory
    // Set VideoBuffer pointer
}

VGA_LoadFont()

void VGA_LoadFont	(	void *	fontBuffer,
		int	maxLength
	)

VGA_Putc()

void VGA_Putc

(

short

ch

)

Definition at line 115 of file vgacons.c.

{
    c |= (TextAttribute << 8);
    switch (c & 0xFF)
    {
        case '\b':
            if (CurrentX > 0) {
                CurrentX--;
                VideoBuffer[CurrentX + CurrentY * SizeX] = 0x20 | (TextAttribute << 8);
            }
            break;
        case '\n':
            if (CurrentY >= (SizeY - 1)) {
                VGA_ScrollDisplay();
            } else {
                CurrentY++;
            }
            CurrentX = 0;
            break;
        case '\r':
            break;
        case '\t':
            VGA_Putc(' ');
            VGA_Putc(' ');
            VGA_Putc(' ');
            VGA_Putc(' ');
            break;
        default:
            VideoBuffer[CurrentX + CurrentY * SizeX] = c;
            CurrentX++;
            if (CurrentX == SizeX)  {
                if (CurrentY >= (SizeY - 1)) {
                    VGA_ScrollDisplay();
                } else {
                    CurrentY++;
                }
                CurrentX = 0;
            }
            break;
    }
}

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VGA_Puts()

void VGA_Puts

(

const char *

str

)

Definition at line 157 of file vgacons.c.

{
    const char *p = str;
    while (*p != '\0')
        VGA_Putc(*p++);
}

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VGA_SaveFont()

void VGA_SaveFont	(	void *	fontBuffer,
		int	maxLength
	)

VGA_ScollDisplay()

void VGA_ScollDisplay

(

void

)

VGA_SwitchTo()

void VGA_SwitchTo

(

int

screen

)