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annotate src/video/ataricommon/SDL_xbiosinterrupt.S @ 1768:814f9f2c7a33

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Fixed bug #80 Date: 21 Apr 2003 17:20:20 +0100 From: Alan Swanson <swanson@uklinux.net> Subject: [SDL] New XFree 4.3 Video Mode Patch If you look at the unsorted list of modes returned by X, here's mine; 1280 x 1024 @ 85.0 > 1024 x 768 @ 100.3 > USER 800 x 600 @ 125.5 > SET 640 x 480 @ 124.9 > 1280 x 1024 @ 75.0 ] 1280 x 1024 @ 60.0 ] 1280 x 960 @ 85.0 ] X11 1280 x 960 @ 60.0 ] AUTO 1152 x 864 @ 75.0 ]=20 1152 x 768 @ 54.8 ] 960 x 720 @ 120.0 ] ... 640 x 400 @ 85.1 ] 256k 576 x 432 @ 150.0 ] 249k PIXEL 640 x 350 @ 85.1 ] 224k COUNT 576 x 384 @ 109.6 ] 221k ... The user set modes come first followed by X set modes which are ordered by decreasing number of pixels and refresh. The reason why every other library or program not using SDL working is due to SDL scanning the modes in reverse getting X11 provided modes modes with the lowest refresh.
author Sam Lantinga <slouken@libsdl.org>
date Fri, 05 May 2006 05:50:26 +0000
parents c9b51268668f
children b7d426b28c18
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 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_mouseb
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37 .globl _SDL_AtariXbios_mousex
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38 .globl _SDL_AtariXbios_mousey
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39 .globl _SDL_AtariXbios_joystick
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40
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41 /*--- Vector installer ---*/
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42
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43 _SDL_AtariXbios_Install:
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44 movel sp@(4),a0
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45
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46 /* Stop interrupts */
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47
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48 movew #0x2700,sr
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49
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50 /* Save old mouse vector, set our routine */
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51
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52 clrl oldmousevector
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53 movel sp@(8),d0
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54 beqs no_new_mouse_vector
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55 movel a0@(16),oldmousevector
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56 movel d0,a0@(16)
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57 no_new_mouse_vector:
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58
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59 /* Save old joystick vector, set our routine */
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60
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61 clrl oldjoystickvector
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62 movel sp@(12),d0
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63 beqs no_new_joystick_vector
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64 movel a0@(24),oldjoystickvector
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65 movel d0,a0@(24)
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66 no_new_joystick_vector:
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67
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68 /* Restart interrupts */
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69
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70 movew #0x2300,sr
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71
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72 rts
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73
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74 /*--- Vector restorer ---*/
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75
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76 _SDL_AtariXbios_Restore:
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77 movel sp@(4),a0
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78
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79 /* Stop interrupts */
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81 movew #0x2700,sr
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82
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83 /* Restore mouse vector */
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84
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85 movel oldmousevector,d0
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86 beqs no_restore_mouse
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87 movel d0,a0@(16)
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88 no_restore_mouse:
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89
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90 /* Restore joystick vector */
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91
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92 movel oldjoystickvector,d0
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93 beqs no_restore_joystick
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94 movel d0,a0@(24)
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95 no_restore_joystick:
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96
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97 /* Restart interrupts */
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98
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99 movew #0x2300,sr
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100
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101 rts
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102
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103 /*--- Our mouse vector ---*/
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104
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105 .text
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106 .even
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107 .ascii "XBRA"
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108 .ascii "LSDL"
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109 .comm oldmousevector,4*1
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110 _SDL_AtariXbios_MouseVector:
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111 movel d0,sp@-
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112
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113 /* Mouse buttons */
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114 moveb (a0),d0
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115 andw #3,d0
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116 movew d0,_SDL_AtariXbios_mouseb
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117
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118 /* X movement */
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119 moveb a0@(1),d0
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120 extw d0
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121 addw d0,_SDL_AtariXbios_mousex
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122
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123 /* Y movement */
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124 moveb a0@(2),d0
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125 extw d0
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126 addw d0,_SDL_AtariXbios_mousey
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127
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128 /* Jump through old vector */
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129 movel sp@+,d0
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130
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131 movel oldmousevector,sp@-
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132 rts
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133
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134 .data
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135 .even
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136 .comm _SDL_AtariXbios_mousex,2*1
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137 .even
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138 .comm _SDL_AtariXbios_mousey,2*1
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139 .even
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140 .comm _SDL_AtariXbios_mouseb,2*1
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141
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142 /*--- Our joystick vector ---*/
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143
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144 .text
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145 .even
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146 .ascii "XBRA"
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147 .ascii "LSDL"
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148 .comm oldjoystickvector,4*1
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149 _SDL_AtariXbios_JoystickVector:
987
d9f3b5bb7870 Do not use registers when not necessary
Patrice Mandin <patmandin@gmail.com>
parents: 820
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150 movel d0,sp@-
305
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151
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152 /* New joystick state */
1063
0fb50bfaea7f Used wrong offset in joystick packet
Patrice Mandin <patmandin@gmail.com>
parents: 987
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153 moveb a0@(2),d0
305
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154 andw #0x8f,d0
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155 movew d0,_SDL_AtariXbios_joystick
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156
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157 /* Jump through old vector */
987
d9f3b5bb7870 Do not use registers when not necessary
Patrice Mandin <patmandin@gmail.com>
parents: 820
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158 movel sp@+,d0
305
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159
987
d9f3b5bb7870 Do not use registers when not necessary
Patrice Mandin <patmandin@gmail.com>
parents: 820
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160 movel oldjoystickvector,sp@-
305
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161 rts
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162
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163 .data
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164 .even
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165 .comm _SDL_AtariXbios_joystick,2*1