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annotate src/video/ataricommon/SDL_xbiosinterrupt.S @ 1642:f1211a4b7380

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Fixed bug #189 Clip the overlay destination rectangle to the screen area on X11
author Sam Lantinga <slouken@libsdl.org>
date Mon, 17 Apr 2006 05:38:33 +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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80
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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
9c6613983e85 Atari port cleanups from Patrice
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151
9c6613983e85 Atari port cleanups from Patrice
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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
diff changeset
158 movel sp@+,d0
305
9c6613983e85 Atari port cleanups from Patrice
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159
987
d9f3b5bb7870 Do not use registers when not necessary
Patrice Mandin <patmandin@gmail.com>
parents: 820
diff changeset
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
9c6613983e85 Atari port cleanups from Patrice
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165 .comm _SDL_AtariXbios_joystick,2*1