68 lines
1.4 KiB
C
68 lines
1.4 KiB
C
|
#ifndef HAZEL_VGA_H_
|
||
|
|
#define HAZEL_VGA_H_
|
||
|
|
|
||
|
|
|
||
|
|
#include <stdint.h>
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Location of the linear text buffer
|
||
|
|
* Used to directly modify text on screen
|
||
|
|
* 80 columns by 25 rows
|
||
|
|
*/
|
||
|
|
#define VGA_MEMORY_ADDR 0xb8000
|
||
|
|
|
||
|
|
#define VGA_MAX_COLS 80
|
||
|
|
#define VGA_MAX_ROWS 25
|
||
|
|
|
||
|
|
#define CRTC_ADDR_PORT 0x3d4
|
||
|
|
#define CRTC_DATA_PORT 0x3d5
|
||
|
|
|
||
|
|
#define CRTC_CURSOR_LO_REGISTER 0x0f
|
||
|
|
#define CRTC_CURSOR_HI_REGISTER 0x0e
|
||
|
|
|
||
|
|
enum VGA_COLOR {
|
||
|
|
VGA_COLOR_BLACK = 0,
|
||
|
|
VGA_COLOR_BLUE = 1,
|
||
|
|
VGA_COLOR_GREEN = 2,
|
||
|
|
VGA_COLOR_CYAN = 3,
|
||
|
|
VGA_COLOR_RED = 4,
|
||
|
|
VGA_COLOR_MAGENTA = 5,
|
||
|
|
VGA_COLOR_BROWN = 6,
|
||
|
|
VGA_COLOR_LIGHT_GREY = 7,
|
||
|
|
VGA_COLOR_DARK_GREY = 8,
|
||
|
|
VGA_COLOR_LIGHT_BLUE = 9,
|
||
|
|
VGA_COLOR_LIGHT_GREEN = 10,
|
||
|
|
VGA_COLOR_LIGHT_CYAN = 11,
|
||
|
|
VGA_COLOR_LIGHT_RED = 12,
|
||
|
|
VGA_COLOR_LIGHT_MAGENTA = 13,
|
||
|
|
VGA_COLOR_LIGHT_BROWN = 14,
|
||
|
|
VGA_COLOR_WHITE = 15
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Gets the text-mode cursor's position.
|
||
|
|
*
|
||
|
|
* @return The position, not offset, of the cursor. Multiply this by two for the offset.
|
||
|
|
*/
|
||
|
|
uint16_t get_cursor_pos();
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Sets the cursor's position in VGA text-mode.
|
||
|
|
*
|
||
|
|
* @param pos The position, not offset, of the cursor. Multiply by two for the offset.
|
||
|
|
*/
|
||
|
|
void set_cursor_pos(uint16_t pos);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Clears the screen in VGA text-mode by overwriting every character with a zero, then resets the cursor position.
|
||
|
|
*/
|
||
|
|
void clear_screen(void);
|
||
|
|
|
||
|
|
void vga_putc(char c);
|
||
|
|
void popchar();
|
||
|
|
|
||
|
|
void set_color(enum VGA_COLOR col);
|
||
|
|
|
||
|
|
#endif
|