| e14743d1 |
1 | /* |
| 2 | SDL - Simple DirectMedia Layer |
| 3 | Copyright (C) 1997-2009 Sam Lantinga |
| 4 | |
| 5 | This library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | This library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with this library; if not, write to the Free Software |
| 17 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 18 | |
| 19 | Sam Lantinga |
| 20 | slouken@libsdl.org |
| 21 | */ |
| 22 | |
| 23 | /* |
| 24 | * XBIOS mouse & joystick vectors |
| 25 | * |
| 26 | * Patrice Mandin |
| 27 | */ |
| 28 | |
| 29 | .text |
| 30 | |
| 31 | .globl _SDL_AtariXbios_Install |
| 32 | .globl _SDL_AtariXbios_Restore |
| 33 | .globl _SDL_AtariXbios_MouseVector |
| 34 | .globl _SDL_AtariXbios_JoystickVector |
| 35 | |
| 36 | .globl _SDL_AtariXbios_mouselock |
| 37 | .globl _SDL_AtariXbios_mouseb |
| 38 | .globl _SDL_AtariXbios_mousex |
| 39 | .globl _SDL_AtariXbios_mousey |
| 40 | .globl _SDL_AtariXbios_joystick |
| 41 | |
| 42 | /*--- Vector installer ---*/ |
| 43 | |
| 44 | _SDL_AtariXbios_Install: |
| 45 | movel sp@(4),a0 |
| 46 | |
| 47 | /* Stop interrupts */ |
| 48 | |
| 49 | movew #0x2700,sr |
| 50 | |
| 51 | /* Save old mouse vector, set our routine */ |
| 52 | |
| 53 | clrl oldmousevector |
| 54 | movel sp@(8),d0 |
| 55 | beqs no_new_mouse_vector |
| 56 | movel a0@(16),oldmousevector |
| 57 | movel d0,a0@(16) |
| 58 | no_new_mouse_vector: |
| 59 | |
| 60 | /* Save old joystick vector, set our routine */ |
| 61 | |
| 62 | clrl oldjoystickvector |
| 63 | movel sp@(12),d0 |
| 64 | beqs no_new_joystick_vector |
| 65 | movel a0@(24),oldjoystickvector |
| 66 | movel d0,a0@(24) |
| 67 | no_new_joystick_vector: |
| 68 | |
| 69 | /* Restart interrupts */ |
| 70 | |
| 71 | movew #0x2300,sr |
| 72 | |
| 73 | rts |
| 74 | |
| 75 | /*--- Vector restorer ---*/ |
| 76 | |
| 77 | _SDL_AtariXbios_Restore: |
| 78 | movel sp@(4),a0 |
| 79 | |
| 80 | /* Stop interrupts */ |
| 81 | |
| 82 | movew #0x2700,sr |
| 83 | |
| 84 | /* Restore mouse vector */ |
| 85 | |
| 86 | movel oldmousevector,d0 |
| 87 | beqs no_restore_mouse |
| 88 | movel d0,a0@(16) |
| 89 | no_restore_mouse: |
| 90 | |
| 91 | /* Restore joystick vector */ |
| 92 | |
| 93 | movel oldjoystickvector,d0 |
| 94 | beqs no_restore_joystick |
| 95 | movel d0,a0@(24) |
| 96 | no_restore_joystick: |
| 97 | |
| 98 | /* Restart interrupts */ |
| 99 | |
| 100 | movew #0x2300,sr |
| 101 | |
| 102 | rts |
| 103 | |
| 104 | /*--- Our mouse vector ---*/ |
| 105 | |
| 106 | .text |
| 107 | .even |
| 108 | .ascii "XBRA" |
| 109 | .ascii "LSDL" |
| 110 | .comm oldmousevector,4*1 |
| 111 | _SDL_AtariXbios_MouseVector: |
| 112 | movel d0,sp@- |
| 113 | |
| 114 | /* Mouse buttons */ |
| 115 | moveb (a0),d0 |
| 116 | andw #3,d0 |
| 117 | movew d0,_SDL_AtariXbios_mouseb |
| 118 | |
| 119 | /* X movement */ |
| 120 | moveb a0@(1),d0 |
| 121 | extw d0 |
| 122 | addw d0,_SDL_AtariXbios_mousex |
| 123 | |
| 124 | /* Y movement */ |
| 125 | moveb a0@(2),d0 |
| 126 | extw d0 |
| 127 | addw d0,_SDL_AtariXbios_mousey |
| 128 | |
| 129 | /* Lock mouse position ? */ |
| 130 | tstw _SDL_AtariXbios_mouselock |
| 131 | beq.s no_mouse_lock |
| 132 | clrb a0@(1) |
| 133 | clrb a0@(2) |
| 134 | no_mouse_lock: |
| 135 | |
| 136 | /* Jump through old vector */ |
| 137 | movel sp@+,d0 |
| 138 | |
| 139 | movel oldmousevector,sp@- |
| 140 | rts |
| 141 | |
| 142 | .data |
| 143 | .even |
| 144 | .comm _SDL_AtariXbios_mouselock,2*1 |
| 145 | .comm _SDL_AtariXbios_mousex,2*1 |
| 146 | .comm _SDL_AtariXbios_mousey,2*1 |
| 147 | .comm _SDL_AtariXbios_mouseb,2*1 |
| 148 | |
| 149 | /*--- Our joystick vector ---*/ |
| 150 | |
| 151 | .text |
| 152 | .even |
| 153 | .ascii "XBRA" |
| 154 | .ascii "LSDL" |
| 155 | .comm oldjoystickvector,4*1 |
| 156 | _SDL_AtariXbios_JoystickVector: |
| 157 | movel d0,sp@- |
| 158 | |
| 159 | /* New joystick state */ |
| 160 | moveb a0@(2),d0 |
| 161 | andw #0x8f,d0 |
| 162 | movew d0,_SDL_AtariXbios_joystick |
| 163 | |
| 164 | /* Jump through old vector */ |
| 165 | movel sp@+,d0 |
| 166 | |
| 167 | movel oldjoystickvector,sp@- |
| 168 | rts |
| 169 | |
| 170 | .data |
| 171 | .even |
| 172 | .comm _SDL_AtariXbios_joystick,2*1 |
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