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annotate src/video/ataricommon/SDL_biosevents.c @ 281:c5010ab8ba35

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Added initial support for Atari (thanks Patrice!)
author Sam Lantinga <slouken@libsdl.org>
date Sun, 17 Feb 2002 19:54:28 +0000
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children d8b7eae78652
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281
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22
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23 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 /*
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29 * Atari keyboard events manager, using BIOS
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30 *
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31 * Patrice Mandin
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32 */
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33
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34 #include <string.h>
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35
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36 /* Mint includes */
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37 #include <mint/osbind.h>
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38
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39 #include "SDL.h"
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40 #include "SDL_sysevents.h"
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41 #include "SDL_events_c.h"
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42
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43 #include "SDL_atarikeys.h"
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44 #include "SDL_xbiosmouseevents_c.h"
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45
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46 /* To save state of keyboard */
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47 #define ATARIBIOS_MAXKEYS 128
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48
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49 static unsigned char bios_currentkeyboard[ATARIBIOS_MAXKEYS];
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50 static unsigned char bios_previouskeyboard[ATARIBIOS_MAXKEYS];
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51 static unsigned char bios_currentascii[ATARIBIOS_MAXKEYS];
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52
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53 /* Special keys state */
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54 enum {
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55 K_RSHIFT=0,
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56 K_LSHIFT,
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57 K_CTRL,
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58 K_ALT,
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59 K_CAPSLOCK,
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60 K_CLRHOME,
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61 K_INSERT
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62 };
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63
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64 /* The translation tables from a console scancode to a SDL keysym */
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65 static SDLKey keymap[ATARIBIOS_MAXKEYS];
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66
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67 static SDL_keysym *TranslateKey(int scancode, int asciicode, SDL_keysym *keysym);
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68 static void UpdateSpecialKeys(int special_keys_state);
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69
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70 void AtariBios_InitOSKeymap(_THIS)
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71 {
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72 int i;
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73
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74 memset(bios_currentkeyboard, 0, sizeof(bios_currentkeyboard));
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75 memset(bios_previouskeyboard, 0, sizeof(bios_previouskeyboard));
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76
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77 /* Initialize keymap */
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78 for ( i=0; i<sizeof(keymap); i++ )
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79 keymap[i] = SDLK_UNKNOWN;
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80
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81 /* Functions keys */
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82 for ( i = 0; i<10; i++ )
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83 keymap[SCANCODE_F1 + i] = SDLK_F1+i;
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84
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85 /* Cursor keypad */
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86 keymap[SCANCODE_HELP] = SDLK_HELP;
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87 keymap[SCANCODE_UNDO] = SDLK_UNDO;
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88 keymap[SCANCODE_INSERT] = SDLK_INSERT;
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89 keymap[SCANCODE_CLRHOME] = SDLK_HOME;
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90 keymap[SCANCODE_UP] = SDLK_UP;
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91 keymap[SCANCODE_DOWN] = SDLK_DOWN;
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92 keymap[SCANCODE_RIGHT] = SDLK_RIGHT;
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93 keymap[SCANCODE_LEFT] = SDLK_LEFT;
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94
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95 /* Special keys */
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96 keymap[SCANCODE_ESCAPE] = SDLK_ESCAPE;
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97 keymap[SCANCODE_BACKSPACE] = SDLK_BACKSPACE;
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98 keymap[SCANCODE_TAB] = SDLK_TAB;
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99 keymap[SCANCODE_ENTER] = SDLK_RETURN;
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100 keymap[SCANCODE_DELETE] = SDLK_DELETE;
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101 keymap[SCANCODE_LEFTCONTROL] = SDLK_LCTRL;
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102 keymap[SCANCODE_LEFTSHIFT] = SDLK_LSHIFT;
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103 keymap[SCANCODE_RIGHTSHIFT] = SDLK_RSHIFT;
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104 keymap[SCANCODE_LEFTALT] = SDLK_LALT;
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105 keymap[SCANCODE_CAPSLOCK] = SDLK_CAPSLOCK;
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106
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107 AtariXbios_InstallMouseVector();
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108 }
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109
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110 void AtariBios_PumpEvents(_THIS)
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111 {
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112 int i;
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113 SDL_keysym keysym;
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114
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115 /* Update pressed keys */
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116 memset(bios_currentkeyboard, 0, ATARIBIOS_MAXKEYS);
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117
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118 while (Bconstat(_CON)) {
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119 unsigned long key_pressed;
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120 unsigned char asciicode, scancode;
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121
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122 key_pressed=Bconin(_CON);
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123
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124 asciicode = key_pressed;
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125 scancode = key_pressed >> 16;
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126
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127 bios_currentkeyboard[scancode]=0xFF;
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128 bios_currentascii[scancode]=asciicode;
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129 }
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130
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131 /* Read special keys */
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132 UpdateSpecialKeys(Kbshift(-1));
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133
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134 /* Now generate events */
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135 for (i=0; i<ATARIBIOS_MAXKEYS; i++) {
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136 /* Key pressed ? */
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137 if (bios_currentkeyboard[i] && !bios_previouskeyboard[i])
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138 SDL_PrivateKeyboard(SDL_PRESSED, TranslateKey(i, bios_currentascii[i], &keysym));
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139
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140 /* Key unpressed ? */
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141 if (bios_previouskeyboard[i] && !bios_currentkeyboard[i])
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142 SDL_PrivateKeyboard(SDL_RELEASED, TranslateKey(i, 0, &keysym));
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143 }
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144
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145 AtariXbios_PostMouseEvents(this);
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146
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147 /* Will be previous table */
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148 memcpy(bios_previouskeyboard, bios_currentkeyboard, ATARIBIOS_MAXKEYS);
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149 }
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150
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151 static void UpdateSpecialKeys(int special_keys_state)
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152 {
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153 #define UPDATE_SPECIAL_KEYS(numbit,scancode) \
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154 { \
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155 if (special_keys_state & (1<<(numbit))) { \
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156 bios_currentkeyboard[scancode]=0xFF; \
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157 bios_currentascii[scancode]=0; \
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158 } \
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159 }
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160
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161 UPDATE_SPECIAL_KEYS(K_RSHIFT, SCANCODE_RIGHTSHIFT);
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162 UPDATE_SPECIAL_KEYS(K_LSHIFT, SCANCODE_LEFTSHIFT);
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163 UPDATE_SPECIAL_KEYS(K_CTRL, SCANCODE_LEFTCONTROL);
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164 UPDATE_SPECIAL_KEYS(K_ALT, SCANCODE_LEFTALT);
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165 UPDATE_SPECIAL_KEYS(K_CAPSLOCK, SCANCODE_CAPSLOCK);
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166 }
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167
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168 static SDL_keysym *TranslateKey(int scancode, int asciicode, SDL_keysym *keysym)
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169 {
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170 /* Set the keysym information */
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171 keysym->scancode = scancode;
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172
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173 if (asciicode)
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174 keysym->sym = asciicode;
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175 else
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176 keysym->sym = keymap[scancode];
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177
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178 keysym->mod = KMOD_NONE;
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179 keysym->unicode = 0;
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180
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181 return(keysym);
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182 }
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183
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184 void AtariBios_ShutdownEvents(void)
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185 {
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186 AtariXbios_RestoreMouseVector();
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187 }