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annotate src/video/ataricommon/SDL_xbiosinterrupt.S @ 4249:429c8dd3175d SDL-1.2

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Fixed bug #713 Don't clamp the mouse coordinates to the video surface size, instead clamp them to the last known window size. This allows users to get the correct mouse coordinates even if they don't call SDL_SetVideoMode() in response to an SDL_VIDEORESIZE event (used as a hack to retain the OpenGL context on Windows and Linux after a window resize)
author Sam Lantinga <slouken@libsdl.org>
date Sun, 27 Sep 2009 05:18:43 +0000
parents a1b03ba2fcd0
children 2da8b4494ceb
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 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 Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 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 Lesser 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 Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 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 /*
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24 * XBIOS mouse & joystick vectors
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25 *
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26 * Patrice Mandin
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27 */
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28
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29 .text
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30
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31 .globl _SDL_AtariXbios_Install
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32 .globl _SDL_AtariXbios_Restore
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33 .globl _SDL_AtariXbios_MouseVector
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34 .globl _SDL_AtariXbios_JoystickVector
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35
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36 .globl _SDL_AtariXbios_mouselock
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37 .globl _SDL_AtariXbios_mouseb
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38 .globl _SDL_AtariXbios_mousex
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39 .globl _SDL_AtariXbios_mousey
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40 .globl _SDL_AtariXbios_joystick
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41
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42 /*--- Vector installer ---*/
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43
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44 _SDL_AtariXbios_Install:
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45 movel sp@(4),a0
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46
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47 /* Stop interrupts */
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48
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49 movew #0x2700,sr
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50
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51 /* Save old mouse vector, set our routine */
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52
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53 clrl oldmousevector
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54 movel sp@(8),d0
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55 beqs no_new_mouse_vector
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56 movel a0@(16),oldmousevector
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57 movel d0,a0@(16)
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58 no_new_mouse_vector:
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59
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60 /* Save old joystick vector, set our routine */
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61
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62 clrl oldjoystickvector
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63 movel sp@(12),d0
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64 beqs no_new_joystick_vector
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65 movel a0@(24),oldjoystickvector
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66 movel d0,a0@(24)
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67 no_new_joystick_vector:
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68
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69 /* Restart interrupts */
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70
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71 movew #0x2300,sr
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72
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73 rts
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74
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75 /*--- Vector restorer ---*/
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76
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77 _SDL_AtariXbios_Restore:
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78 movel sp@(4),a0
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79
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80 /* Stop interrupts */
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81
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82 movew #0x2700,sr
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83
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84 /* Restore mouse vector */
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85
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86 movel oldmousevector,d0
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87 beqs no_restore_mouse
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88 movel d0,a0@(16)
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89 no_restore_mouse:
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90
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91 /* Restore joystick vector */
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92
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93 movel oldjoystickvector,d0
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94 beqs no_restore_joystick
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95 movel d0,a0@(24)
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96 no_restore_joystick:
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97
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98 /* Restart interrupts */
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99
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100 movew #0x2300,sr
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101
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102 rts
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103
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104 /*--- Our mouse vector ---*/
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105
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106 .text
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107 .even
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108 .ascii "XBRA"
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109 .ascii "LSDL"
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110 .comm oldmousevector,4*1
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111 _SDL_AtariXbios_MouseVector:
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112 movel d0,sp@-
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113
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114 /* Mouse buttons */
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115 moveb (a0),d0
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116 andw #3,d0
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117 movew d0,_SDL_AtariXbios_mouseb
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118
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119 /* X movement */
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120 moveb a0@(1),d0
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121 extw d0
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122 addw d0,_SDL_AtariXbios_mousex
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123
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124 /* Y movement */
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125 moveb a0@(2),d0
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126 extw d0
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127 addw d0,_SDL_AtariXbios_mousey
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128
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129 /* Lock mouse position ? */
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130 tstw _SDL_AtariXbios_mouselock
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131 beq.s no_mouse_lock
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132 clrb a0@(1)
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133 clrb a0@(2)
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134 no_mouse_lock:
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135
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136 /* Jump through old vector */
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137 movel sp@+,d0
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138
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139 movel oldmousevector,sp@-
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140 rts
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141
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142 .data
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143 .even
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144 .comm _SDL_AtariXbios_mouselock,2*1
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145 .comm _SDL_AtariXbios_mousex,2*1
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146 .comm _SDL_AtariXbios_mousey,2*1
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147 .comm _SDL_AtariXbios_mouseb,2*1
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148
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149 /*--- Our joystick vector ---*/
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150
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151 .text
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152 .even
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153 .ascii "XBRA"
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154 .ascii "LSDL"
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155 .comm oldjoystickvector,4*1
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156 _SDL_AtariXbios_JoystickVector:
987
d9f3b5bb7870 Do not use registers when not necessary
Patrice Mandin <patmandin@gmail.com>
parents: 820
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157 movel d0,sp@-
305
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158
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159 /* New joystick state */
1063
0fb50bfaea7f Used wrong offset in joystick packet
Patrice Mandin <patmandin@gmail.com>
parents: 987
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160 moveb a0@(2),d0
305
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161 andw #0x8f,d0
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162 movew d0,_SDL_AtariXbios_joystick
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163
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164 /* Jump through old vector */
987
d9f3b5bb7870 Do not use registers when not necessary
Patrice Mandin <patmandin@gmail.com>
parents: 820
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165 movel sp@+,d0
305
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166
987
d9f3b5bb7870 Do not use registers when not necessary
Patrice Mandin <patmandin@gmail.com>
parents: 820
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167 movel oldjoystickvector,sp@-
305
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168 rts
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169
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170 .data
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171 .even
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172 .comm _SDL_AtariXbios_joystick,2*1