source: rtems/c/src/lib/libbsp/i386/pc386/include/crt.h @ c499856

/**
 * @file
 *
 * @ingroup i386_pc386
 *
 * @brief CRT controller definitions.
 */

/*
 * crt.h  - This file contains definitions for constants related to PC console.
 *          More information can be found at
 *      <http://millenium.atcg.com/~taco/helppc/tables.html>
 *
 * Copyright (C) 1998  Eric Valette (valette@crf.canon.fr)
 *                     Canon Centre Recherche France.
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.rtems.org/license/LICENSE.
 */

#ifndef _CRT_H
#define _CRT_H

/*
 * Bitmap video origins in text mode.
 */

        /* In monochrome */
#define V_MONO  0xb0000
        /* In color      */
#define V_COLOR 0xb8000

/*
 * Video Option Byte location. It must be maintained
 * by the BIOS.
 */
#define VIDEO_MODE_ADDR                 0x449
/*
 * Video controller base IO address location in
 * BIOS data area
 */
#define DISPLAY_CRT_BASE_IO_ADDR        0x463
/*
 * Number of collums and lines locations for the
 * actual video Configuration
 */
#define NB_MAX_COL_ADDR                 0x44a
#define NB_MAX_ROW_ADDR                 0x484

    /*
     * Miscellaneous information set by the BIOS in offset video_mode,
     */

#   define VGAMODE7     0x7     /* VGA mode 7 */

    /* Color codes in text mode for background and foreground. */
#define BLACK           0x0
#define BLUE            0x1
#define GREEN           0x2
#define CYAN            0x3
#define RED             0x4
#define MAGENTA         0x5
#define BROWN           0x6
#define WHITE           0x7

#define GRAY            0x8
#define LT_BLUE         0x9
#define LT_GREEN        0xa
#define LT_CYAN         0xb
#define LT_RED          0xc
#define LT_MAGENTA      0xd
#define YELLOW          0xe
#define LT_WHITE        0xf

#define BLINK           0x8     /* Mask used to determine blinking */
#define OFF             0
#define ON              1

/*
 * CRT Controller register offset definitions
 */

#   define CC_CURSSTART 0x0a    /* Cursor start scan line */
#   define CC_CURSEND   0x0b    /* Cursor end scan line */
#   define CC_STARTADDRHI 0x0c  /* start video ram addr msb */
#   define CC_STARTADDRLO 0x0d  /* start video ram lsb */
#   define CC_CURSHIGH  0x0e    /* Cursor high location (8 msb) */
#   define CC_CURSLOW   0x0f    /* Cursor low location (8 msb) */
#   define CC_VRETSTART 0x10    /* vertical synchro start lsb */
#   define CC_VRETEND   0x11    /* vertical syn end (also it control) */
#   define CC_VDISPEND  0x12    /* vertical display end lsb register */

#endif /* _CRT_H */