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annotate src/video/ataricommon/SDL_ikbdinterrupt.S @ 4236:1fc8c8a5ff00 SDL-1.2

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Fixed endianness issues with fullscreen mode
author Sam Lantinga <slouken@libsdl.org>
date Wed, 23 Sep 2009 06:56:28 +0000
parents a1b03ba2fcd0
children 40e4536ad0c3
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 * IKBD 6301 interrupt routine
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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_AtariIkbdInstall
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32 .globl _SDL_AtariIkbdUninstall
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33
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34 .globl _SDL_AtariIkbd_keyboard
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35 .globl _SDL_AtariIkbd_mouseb
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36 .globl _SDL_AtariIkbd_mousex
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37 .globl _SDL_AtariIkbd_mousey
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38 .globl _SDL_AtariIkbd_joystick
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39
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40 .globl _SDL_AtariIkbd_enabled
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41
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42 /*--- Install our IKBD vector ---*/
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43
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44 _SDL_AtariIkbdInstall:
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45 moveml d0-d1/a0-a1,sp@-
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46
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47 | Disable 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 MFP registers used for keyboard
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52
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53 lea 0xfffffa00:w,a0
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54 btst #6,a0@(0x09)
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55 sne ikbd_ierb
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56 btst #6,a0@(0x15)
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57 sne ikbd_imrb
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58
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59 | Set our routine
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60
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61 movel 0x118:w,old_ikbd
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62 movel #ikbd,0x118:w
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63 bset #6,0xfffffa09:w | IERB
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64 bset #6,0xfffffa15:w | IMRB
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65
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66 | Set mouse relative mode
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67
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68 moveb #8,0xfffffc02:w
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69
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70 | Reenable interrupts
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71
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72 movew #0x2300,sr
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73
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74 | Interrupts done
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75
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76 movew #0xffff,_SDL_AtariIkbd_enabled
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77
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78 moveml sp@+,d0-d1/a0-a1
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79 rts
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80
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81 /*--- Uninstall our IKBD vector ---*/
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82
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83 _SDL_AtariIkbdUninstall:
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84 movel a0,sp@-
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85
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86 | Disable interrupts
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88 movew #0x2700,sr
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89
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90 | Restore previous MFP registers
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91
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92 lea 0xfffffa00:w,a0
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93
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94 bclr #6,a0@(0x09)
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95 tstb ikbd_ierb
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96 beqs ikbd_restoreierb
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97 bset #6,a0@(0x09)
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98 ikbd_restoreierb:
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99
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100 bclr #6,a0@(0x15)
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101 tstb ikbd_imrb
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102 beqs ikbd_restoreimrb
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103 bset #6,a0@(0x15)
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104 ikbd_restoreimrb:
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105
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106 movel old_ikbd,0x118:w
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107
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108 | Clear keyboard buffer
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109
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110 lea 0xfffffc00:w,a0
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111 ikbd_videbuffer:
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112 btst #0,a0@
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113 beqs ikbd_finbuffer
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114 tstb a0@(0x02)
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115 bras ikbd_videbuffer
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116 ikbd_finbuffer:
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117
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118 | Reenable interrupts
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119
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120 movew #0x2300,sr
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121
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122 movel sp@+,a0
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123 rts
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124
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125 .bss
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126
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127 .even
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128 .comm ikbd_ierb,1
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129 .comm ikbd_imrb,1
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131 /*--- Our custom IKBD vector ---*/
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132
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133 .text
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134 .even
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135 .ascii "XBRA"
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136 .ascii "LSDL"
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137 .comm old_ikbd,4*1
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138 ikbd:
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139 | Check if source is IKBD or MIDI
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140 btst #0,0xfffffc00.w
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141 beqs ikbd_oldmidi
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142
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143 moveml d0-d1/a0,sp@-
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144 moveb 0xfffffc02:w,d0
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145
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parents: 305
diff changeset
146 | Joystick packet ?
281
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
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parents:
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147
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
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parents:
diff changeset
148 cmpb #0xff,d0
1081
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parents: 305
diff changeset
149 beqs ikbd_yes_joystick
281
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
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parents:
diff changeset
150
1081
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diff changeset
151 | Mouse packet ?
281
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
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152
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
153 cmpb #0xf8,d0
1081
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parents: 305
diff changeset
154 bmis ikbd_no_mouse
281
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
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155 cmpb #0xfc,d0
1081
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diff changeset
156 bpls ikbd_no_mouse
281
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157
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158 | Mouse packet, byte #1
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159
281
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
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160 ikbd_yes_mouse:
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
161 andw #3,d0
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
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162 movew d0,_SDL_AtariIkbd_mouseb
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
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163
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
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164 movel #ikbd_mousex,0x118:w
1081
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diff changeset
165 bras ikbd_endit_stack
281
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166
1082
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diff changeset
167 | Joystick packet, byte #1
48436ffdf677 Avoid generating multiple key press/release messages for the same key
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diff changeset
168
281
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
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169 ikbd_yes_joystick:
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parents:
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170 movel #ikbd_joystick,0x118:w
1081
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diff changeset
171 bras ikbd_endit_stack
281
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
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172
1082
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173 | Keyboard press/release
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174
281
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175 ikbd_no_mouse:
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Sam Lantinga <slouken@libsdl.org>
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176 moveb d0,d1
1082
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177 lea _SDL_AtariIkbd_keyboard,a0
48436ffdf677 Avoid generating multiple key press/release messages for the same key
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178 andw #0x7f,d1
48436ffdf677 Avoid generating multiple key press/release messages for the same key
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179 tas d0
48436ffdf677 Avoid generating multiple key press/release messages for the same key
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180 spl a0@(0,d1:w)
1081
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diff changeset
181
369dcdb52d70 Call old interrupt when receiving MIDI stuff
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diff changeset
182 | End of interrupt
281
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183
1081
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diff changeset
184 ikbd_endit_stack:
369dcdb52d70 Call old interrupt when receiving MIDI stuff
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parents: 305
diff changeset
185 moveml sp@+,d0-d1/a0
281
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186 ikbd_endit:
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187 bclr #6,0xfffffa11:w
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Sam Lantinga <slouken@libsdl.org>
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188 rte
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
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189
1081
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190 | Call old MIDI interrupt
369dcdb52d70 Call old interrupt when receiving MIDI stuff
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parents: 305
diff changeset
191
369dcdb52d70 Call old interrupt when receiving MIDI stuff
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parents: 305
diff changeset
192 ikbd_oldmidi:
369dcdb52d70 Call old interrupt when receiving MIDI stuff
Patrice Mandin <patmandin@gmail.com>
parents: 305
diff changeset
193 movel old_ikbd,sp@-
369dcdb52d70 Call old interrupt when receiving MIDI stuff
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parents: 305
diff changeset
194 rts
369dcdb52d70 Call old interrupt when receiving MIDI stuff
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diff changeset
195
1082
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196 | Mouse packet, byte #2
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197
281
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198 ikbd_mousex:
1082
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199
1081
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diff changeset
200 | Check if source is IKBD or MIDI
1110
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diff changeset
201 btst #0,0xfffffc00.w
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202 beqs ikbd_oldmidi
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diff changeset
203
369dcdb52d70 Call old interrupt when receiving MIDI stuff
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parents: 305
diff changeset
204 movew d0,sp@-
281
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205
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
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parents:
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206 moveb 0xfffffc02:w,d0
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207 extw d0
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208 addw d0,_SDL_AtariIkbd_mousex
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209
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diff changeset
210 movew sp@+,d0
281
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211
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
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parents:
diff changeset
212 movel #ikbd_mousey,0x118:w
1081
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diff changeset
213 bras ikbd_endit
281
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214
1082
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215 | Mouse packet, byte #3
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diff changeset
216
281
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217 ikbd_mousey:
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218
1081
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diff changeset
219 | Check if source is IKBD or MIDI
1110
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diff changeset
220 btst #0,0xfffffc00.w
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221 beqs ikbd_oldmidi
1081
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diff changeset
222
369dcdb52d70 Call old interrupt when receiving MIDI stuff
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parents: 305
diff changeset
223 movew d0,sp@-
281
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parents:
diff changeset
224
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
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parents:
diff changeset
225 moveb 0xfffffc02:w,d0
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
226 extw d0
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diff changeset
227 addw d0,_SDL_AtariIkbd_mousey
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parents:
diff changeset
228
1081
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diff changeset
229 movew sp@+,d0
281
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
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parents:
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230
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
231 movel #ikbd,0x118:w
1081
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parents: 305
diff changeset
232 bras ikbd_endit
281
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Sam Lantinga <slouken@libsdl.org>
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233
1082
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Patrice Mandin <patmandin@gmail.com>
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diff changeset
234 | Joystick packet, byte #2
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diff changeset
235
281
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
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parents:
diff changeset
236 ikbd_joystick:
1082
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diff changeset
237
1081
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parents: 305
diff changeset
238 | Check if source is IKBD or MIDI
1110
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Patrice Mandin <patmandin@gmail.com>
parents: 1109
diff changeset
239 btst #0,0xfffffc00.w
b6fdf299a2f3 Revert back to 1.6 revision
Patrice Mandin <patmandin@gmail.com>
parents: 1109
diff changeset
240 beqs ikbd_oldmidi
1081
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Patrice Mandin <patmandin@gmail.com>
parents: 305
diff changeset
241
281
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
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242 moveb 0xfffffc02:w,_SDL_AtariIkbd_joystick+1
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
243
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
244 movel #ikbd,0x118:w
1081
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Patrice Mandin <patmandin@gmail.com>
parents: 305
diff changeset
245 bras ikbd_endit
281
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
246
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
247 .data
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
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parents:
diff changeset
248
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
249 .even
305
9c6613983e85 Atari port cleanups from Patrice
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
250 _SDL_AtariIkbd_enabled:
9c6613983e85 Atari port cleanups from Patrice
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
251 .word 0
1081
369dcdb52d70 Call old interrupt when receiving MIDI stuff
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parents: 305
diff changeset
252
369dcdb52d70 Call old interrupt when receiving MIDI stuff
Patrice Mandin <patmandin@gmail.com>
parents: 305
diff changeset
253 .bss
369dcdb52d70 Call old interrupt when receiving MIDI stuff
Patrice Mandin <patmandin@gmail.com>
parents: 305
diff changeset
254
305
9c6613983e85 Atari port cleanups from Patrice
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
255 .even
281
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
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256 .comm _SDL_AtariIkbd_keyboard,128
1081
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parents: 305
diff changeset
257 .comm _SDL_AtariIkbd_mousex,2
369dcdb52d70 Call old interrupt when receiving MIDI stuff
Patrice Mandin <patmandin@gmail.com>
parents: 305
diff changeset
258 .comm _SDL_AtariIkbd_mousey,2
369dcdb52d70 Call old interrupt when receiving MIDI stuff
Patrice Mandin <patmandin@gmail.com>
parents: 305
diff changeset
259 .comm _SDL_AtariIkbd_mouseb,2
369dcdb52d70 Call old interrupt when receiving MIDI stuff
Patrice Mandin <patmandin@gmail.com>
parents: 305
diff changeset
260 .comm _SDL_AtariIkbd_joystick,2