apps/window_server/vga.cpp

   1 /* $Id$
   2 **
   3 ** Copyright 1998 Brian J. Swetland
   4 ** All rights reserved.
   5 **
   6 ** Redistribution and use in source and binary forms, with or without
   7 ** modification, are permitted provided that the following conditions
   8 ** are met:
   9 ** 1. Redistributions of source code must retain the above copyright
  10 **    notice, this list of conditions, and the following disclaimer.
  11 ** 2. Redistributions in binary form must reproduce the above copyright
  12 **    notice, this list of conditions, and the following disclaimer in the
  13 **    documentation and/or other materials provided with the distribution.
  14 ** 3. The name of the author may not be used to endorse or promote products
  15 **    derived from this software without specific prior written permission.
  16 **
  17 ** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18 ** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19 ** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20 ** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21 ** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22 ** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25 ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26 ** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27 */
  28 #include "vga.h"
  29
  30 #include <i386/io.h>
  31
  32 const int MiscOutputReg = 0x3c2;
  33 const int DataReg = 0x3c0;
  34 const int AddressReg = 0x3c0;
  35
  36 const char mode13[][32] = {
  37   { 0x03, 0x01, 0x0f, 0x00, 0x0e },            /* 0x3c4, index 0-4*/
  38   { 0x5f, 0x4f, 0x50, 0x82, 0x54, 0x80, 0xbf, 0x1f,
  39     0x00, 0x41, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  40     0x9c, 0x0e, 0x8f, 0x28, 0x40, 0x96, 0xb9, 0xa3,
  41     0xff },                                    /* 0x3d4, index 0-0x18*/
  42   { 0, 0, 0, 0, 0, 0x40, 0x05, 0x0f, 0xff },   /* 0x3ce, index 0-8*/
  43   { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
  44     0x41, 0, 0x0f, 0, 0 }                      /* 0x3c0, index 0-0x14*/
  45 };
  46
  47 #define Vga256                   0x13   // 320x200x256
  48 #define TextMode                 0x03   // 80x25 text mode
  49 #define PaletteMask              0x3C6  // bit mask register
  50 #define PaletteRegisterRead      0x3C7  // read index
  51 #define PaletteRegisterWrite     0x3C8  // write index
  52 #define PaletteData              0x3C9  // send/receive data here
  53 #define RomCharSegment           0xF000
  54 #define RomCharOffset            0xFA6E
  55 #define CharWidth                8
  56 #define CharHeight               8
  57
  58 void SetPalette(int color, int red, int green, int blue)
  59 {
  60
  61   outb(0xFF, PaletteMask);
  62   outb(color, PaletteRegisterWrite);
  63   outb(red, PaletteData);
  64   outb(green, PaletteData);
  65   outb(blue, PaletteData);
  66 }
  67
  68 int InitVGA()
  69 {
  70   int i;
  71
  72   outb_p(0x63, MiscOutputReg);
  73   outb_p(0x00, 0x3da);
  74
  75   for (i=0; i < 5; i++) {
  76     outb_p(i, 0x3c4);
  77     outb_p(mode13[0][i], 0x3c4+1);
  78   }
  79
  80   outw_p(0x0e11, 0x3d4);
  81
  82   for (i=0; i < 0x19; i++) {
  83     outb_p(i, 0x3d4);
  84     outb_p(mode13[1][i], (0x3d4 + 1));
  85   }
  86
  87   for (i=0; i < 0x9; i++) {
  88     outb_p(i, 0x3ce);
  89     outb_p(mode13[2][i], (0x3ce + 1));
  90   }
  91
  92   inb_p(0x3da);
  93
  94   for (i=0; i < 0x15; i++) {
  95     inw(DataReg);
  96     outb_p(i, AddressReg);
  97     outb_p(mode13[3][i], DataReg);
  98   }
  99
 100   outb_p(0x20, 0x3c0);
 101
 102   return 1;
 103 }
 104