vga.h

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/* ES40 emulator.
 * Copyright (C) 2007-2008 by the ES40 Emulator Project
 *
 * WWW    : http://sourceforge.net/projects/es40
 * E-mail : camiel@camicom.com
 * 
 *  This file is based upon Bochs.
 *
 *  Copyright (C) 2002  MandrakeSoft S.A.
 *
 *    MandrakeSoft S.A.
 *    43, rue d'Aboukir
 *    75002 Paris - France
 *    http://www.linux-mandrake.com/
 *    http://www.mandrakesoft.com/
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2 of the License, or (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 */

#ifndef BX_IODEV_VGA_H
#define BX_IODEV_VGA_H

// Make colour
#define MAKE_COLOUR                                                              \
    (                                                                            \
      red, red_shiftfrom, red_shiftto, red_mask, green, green_shiftfrom,         \
        green_shiftto, green_mask, blue, blue_shiftfrom, blue_shiftto, blue_mask \
    )                                                                            \
      (                                                                          \
        (                                                                        \
          (                                                                      \
            ((red_shiftto) > (red_shiftfrom)) ? (red) <<                         \
              ((red_shiftto) - (red_shiftfrom)) : (red) >>                       \
                ((red_shiftfrom) - (red_shiftto))                                \
          ) & (red_mask)                                                         \
        ) |                                                                      \
          (                                                                      \
            (                                                                    \
              ((green_shiftto) > (green_shiftfrom)) ? (green) <<                 \
                ((green_shiftto) - (green_shiftfrom)) : (green) >>               \
                  ((green_shiftfrom) - (green_shiftto))                          \
            ) & (green_mask)                                                     \
          ) |                                                                    \
            (                                                                    \
              (                                                                  \
                ((blue_shiftto) > (blue_shiftfrom)) ? (blue) <<                  \
                  ((blue_shiftto) - (blue_shiftfrom)) : (blue) >>                \
                    ((blue_shiftfrom) - (blue_shiftto))                          \
              ) & (blue_mask)                                                    \
            )                                                                    \
      )
#if BX_SUPPORT_VBE
#define VBE_DISPI_TOTAL_VIDEO_MEMORY_MB     8
#define VBE_DISPI_4BPP_PLANE_SHIFT          21

#define VBE_DISPI_BANK_ADDRESS              0xA0000
#define VBE_DISPI_BANK_SIZE_KB              64

#define VBE_DISPI_MAX_XRES                  1600
#define VBE_DISPI_MAX_YRES                  1200
#define VBE_DISPI_MAX_BPP                   32

#define VBE_DISPI_IOPORT_INDEX              0x01CE
#define VBE_DISPI_IOPORT_DATA               0x01CF

#define VBE_DISPI_IOPORT_INDEX_OLD          0xFF80
#define VBE_DISPI_IOPORT_DATA_OLD           0xFF81

#define VBE_DISPI_INDEX_ID                  0x0
#define VBE_DISPI_INDEX_XRES                0x1
#define VBE_DISPI_INDEX_YRES                0x2
#define VBE_DISPI_INDEX_BPP                 0x3
#define VBE_DISPI_INDEX_ENABLE              0x4
#define VBE_DISPI_INDEX_BANK                0x5
#define VBE_DISPI_INDEX_VIRT_WIDTH          0x6
#define VBE_DISPI_INDEX_VIRT_HEIGHT         0x7
#define VBE_DISPI_INDEX_X_OFFSET            0x8
#define VBE_DISPI_INDEX_Y_OFFSET            0x9

#define VBE_DISPI_ID0                       0xB0C0
#define VBE_DISPI_ID1                       0xB0C1
#define VBE_DISPI_ID2                       0xB0C2
#define VBE_DISPI_ID3                       0xB0C3
#define VBE_DISPI_ID4                       0xB0C4

#define VBE_DISPI_BPP_4                     0x04
#define VBE_DISPI_BPP_8                     0x08
#define VBE_DISPI_BPP_15                    0x0F
#define VBE_DISPI_BPP_16                    0x10
#define VBE_DISPI_BPP_24                    0x18
#define VBE_DISPI_BPP_32                    0x20

#define VBE_DISPI_DISABLED                  0x00
#define VBE_DISPI_ENABLED                   0x01
#define VBE_DISPI_GETCAPS                   0x02
#define VBE_DISPI_8BIT_DAC                  0x20
#define VBE_DISPI_LFB_ENABLED               0x40
#define VBE_DISPI_NOCLEARMEM                0x80

#define VBE_DISPI_LFB_PHYSICAL_ADDRESS      0xE0000000

#define VBE_DISPI_TOTAL_VIDEO_MEMORY_KB     (VBE_DISPI_TOTAL_VIDEO_MEMORY_MB * 1024)
#define VBE_DISPI_TOTAL_VIDEO_MEMORY_BYTES  (VBE_DISPI_TOTAL_VIDEO_MEMORY_KB * 1024)
#define BX_MAX_XRES                         VBE_DISPI_MAX_XRES
#define BX_MAX_YRES                         VBE_DISPI_MAX_YRES

#elif BX_SUPPORT_CLGD54XX
#define BX_MAX_XRES 1280
#define BX_MAX_YRES 1024

#else
#define BX_MAX_XRES 800
#define BX_MAX_YRES 600
#endif //BX_SUPPORT_VBE
#define X_TILESIZE      16
#define Y_TILESIZE      24
#define BX_NUM_X_TILES  (BX_MAX_XRES / X_TILESIZE)
#define BX_NUM_Y_TILES  (BX_MAX_YRES / Y_TILESIZE)

// Support varying number of rows of text.  This used to
// be limited to only 25 lines.
#define BX_MAX_TEXT_LINES 100

//  struct {
//    u16  vbe_cur_dispi;
//    u16  vbe_xres;
//    u16  vbe_yres;
//    u16  vbe_bpp;
//    u16  vbe_max_xres;
//    u16  vbe_max_yres;
//    u16  vbe_max_bpp;
//    u16  vbe_bank;
//    bool vbe_enabled;
//    u16  vbe_curindex;
//    u32  vbe_visible_screen_size; /**< in bytes */
//    u16  vbe_offset_x;                 /**< Virtual screen x start (in pixels) */
//    u16  vbe_offset_y;                 /**< Virtual screen y start (in pixels) */
//    u16  vbe_virtual_xres;
//    u16  vbe_virtual_yres;
//    u32  vbe_virtual_start;   /**< For dealing with bpp>8, this is where the virtual screen starts. */
//    u8   vbe_bpp_multiplier;  /**< We have to save this b/c sometimes we need to recalculate stuff with it. */
//    bool vbe_lfb_enabled;
//    bool vbe_get_capabilities;
//    bool vbe_8bit_dac;
//  } s;  // state information
#endif

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