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annotate src/video/ataricommon/SDL_xbiosinterrupt.S @ 4389:c6c3a6e7db46 SDL-1.2

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Fixed bug #899 Jeremiah Morris 2009-12-09 16:23:50 PST Re-enable mouseLocation workaround on 10.4, 10.5 OS X systems before 10.6 have a bug with [NSEvent mouseLocation] if the screen resolution changes. SDL_QuartzVideo.m contains a workaround for this bug, but it was placed inside an #ifdef in revision 4762. The comment reads, "I'm gambling they fixed this by 10.4." After seeing this bug on several Tiger and Leopard systems (both PPC and Intel), I can confirm that it's not fixed until 10.6. The workaround doesn't compile for x86_64/10.6, so I can understand why it was segregated, but it needs to remain in place for the i386 and ppc versions. The workaround causes no problems under 10.6, even though it's not necessary there. Patch is attached with one method of keeping the workaround active on the systems that need it.
author Sam Lantinga <slouken@libsdl.org>
date Fri, 11 Dec 2009 15:11:49 +0000
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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 #if defined(__mcoldfire__)
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57 movel a0@(16),d1
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58 movel d1,oldmousevector
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59 #else
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60 movel a0@(16),oldmousevector
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61 #endif
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62 movel d0,a0@(16)
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63 no_new_mouse_vector:
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64
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65 /* Save old joystick vector, set our routine */
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66
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67 clrl oldjoystickvector
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68 movel sp@(12),d0
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69 beqs no_new_joystick_vector
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70 #if defined(__mcoldfire__)
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71 movel a0@(24),d1
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72 movel d1,oldjoystickvector
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73 #else
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74 movel a0@(24),oldjoystickvector
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75 #endif
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76 movel d0,a0@(24)
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77 no_new_joystick_vector:
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78
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79 /* Restart interrupts */
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80
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81 movew #0x2300,sr
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82
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83 rts
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84
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85 /*--- Vector restorer ---*/
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86
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87 _SDL_AtariXbios_Restore:
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88 movel sp@(4),a0
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89
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90 /* Stop interrupts */
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91
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92 movew #0x2700,sr
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93
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94 /* Restore mouse vector */
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95
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96 movel oldmousevector,d0
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97 beqs no_restore_mouse
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98 movel d0,a0@(16)
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99 no_restore_mouse:
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100
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101 /* Restore joystick vector */
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102
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103 movel oldjoystickvector,d0
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104 beqs no_restore_joystick
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105 movel d0,a0@(24)
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106 no_restore_joystick:
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107
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108 /* Restart interrupts */
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109
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110 movew #0x2300,sr
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111
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112 rts
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113
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114 /*--- Our mouse vector ---*/
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115
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116 .text
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117 .even
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118 .ascii "XBRA"
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119 .ascii "LSDL"
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120 .comm oldmousevector,4*1
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121 _SDL_AtariXbios_MouseVector:
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122 #if defined(__mcoldfire__)
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123 lea sp@(-8),sp
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124 moveml d0-d1,sp@
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125 #else
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126 movel d0,sp@-
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127 #endif
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128
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129 /* Mouse buttons */
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130 moveb (a0),d0
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131 #if defined(__mcoldfire__)
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132 andl #3,d0
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133 #else
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134 andw #3,d0
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135 #endif
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136 movew d0,_SDL_AtariXbios_mouseb
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137
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138 /* X movement */
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139 moveb a0@(1),d0
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140 extw d0
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141 #if defined(__mcoldfire__)
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142 movew _SDL_AtariXbios_mousex,d1
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143 addl d1,d0
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144 movew d0,_SDL_AtariXbios_mousex
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145 #else
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146 addw d0,_SDL_AtariXbios_mousex
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147 #endif
305
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148
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149 /* Y movement */
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150 moveb a0@(2),d0
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151 extw d0
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152 #if defined(__mcoldfire__)
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153 movew _SDL_AtariXbios_mousey,d1
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154 addl d1,d0
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155 movew d0,_SDL_AtariXbios_mousey
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156 #else
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157 addw d0,_SDL_AtariXbios_mousey
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158 #endif
305
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159
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160 /* Lock mouse position ? */
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161 tstw _SDL_AtariXbios_mouselock
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162 beq.s no_mouse_lock
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163 clrb a0@(1)
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164 clrb a0@(2)
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165 no_mouse_lock:
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166
305
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167 /* Jump through old vector */
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168 #if defined(__mcoldfire__)
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169 moveml sp@,d0-d1
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170 lea sp@(8),sp
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171 #else
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172 movel sp@+,d0
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173 #endif
305
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174
987
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175 movel oldmousevector,sp@-
305
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176 rts
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177
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178 .data
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179 .even
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180 .comm _SDL_AtariXbios_mouselock,2*1
305
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181 .comm _SDL_AtariXbios_mousex,2*1
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182 .comm _SDL_AtariXbios_mousey,2*1
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183 .comm _SDL_AtariXbios_mouseb,2*1
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184
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185 /*--- Our joystick vector ---*/
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186
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187 .text
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188 .even
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189 .ascii "XBRA"
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190 .ascii "LSDL"
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191 .comm oldjoystickvector,4*1
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192 _SDL_AtariXbios_JoystickVector:
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193 movel d0,sp@-
305
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194
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195 /* New joystick state */
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196 moveb a0@(2),d0
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197 #if defined(__mcoldfire__)
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198 andl #0x8f,d0
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199 #else
305
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200 andw #0x8f,d0
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201 #endif
305
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202 movew d0,_SDL_AtariXbios_joystick
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203
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204 /* Jump through old vector */
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205 movel sp@+,d0
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206
987
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207 movel oldjoystickvector,sp@-
305
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208 rts
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209
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210 .data
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211 .even
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212 .comm _SDL_AtariXbios_joystick,2*1