crt.h

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/*
 * 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 */