diff options
| -rw-r--r-- | drivers/video/vga.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/drivers/video/vga.h b/drivers/video/vga.h new file mode 100644 index 0000000..e7ff29f --- /dev/null +++ b/drivers/video/vga.h @@ -0,0 +1,45 @@ +#ifndef DRIVERS_VIDEO_VGA_H +#define DRIVERS_VIDEO_VGA_H + +#include <stddef.h> + +/* VGA Video RAM base addresses */ +#define VGA_VRAM_BC 0xB8000 // Color +#define VGA_VRAM_BM 0xB0000 // Monochrome + +/* VGA index register ports */ +#define VGA_CRTC_IC 0x3D4 // Color +#define VGA_CRTC_IM 0x3B4 // Monochrome + +/* VGA data register ports */ +#define VGA_CRTC_DC 0x3D5 // Color +#define VGA_CRTC_DM 0x3B5 // Monochorme + +/* VGA CRTC register indices */ +#define VGA_CRTC_CURSOR_H 0x0E +#define VGA_CRTC_CURSOR_L 0x0F + +/* Hardware text mode color constants. */ +enum vga_colors { + 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 +}; + +#define VGA_ENTRY_COLOR(fg, bg) ((uint8_t)(fg | bg << 4)) +#define VGA_ENTRY(uc, color) ((uint16_t) uc | (uint16_t) color << 8) + +#endif /* DRIVERS_VIDEO_VGA_H */ |