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annotate src/video/ataricommon/SDL_ikbdinterrupt.S @ 1082:48436ffdf677

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Avoid generating multiple key press/release messages for the same key
author Patrice Mandin <patmandin@gmail.com>
date Wed, 29 Jun 2005 20:32:46 +0000
parents 369dcdb52d70
children 5fe7c6b8adc3
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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f6ffac90895c Updated copyright information for 2002
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 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 Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 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 Library 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 Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 /*
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29 * IKBD 6301 interrupt routine
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30 *
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31 * Patrice Mandin
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32 */
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33
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34 .text
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35
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36 .globl _SDL_AtariIkbdInstall
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37 .globl _SDL_AtariIkbdUninstall
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38
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39 .globl _SDL_AtariIkbd_keyboard
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40 .globl _SDL_AtariIkbd_mouseb
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41 .globl _SDL_AtariIkbd_mousex
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42 .globl _SDL_AtariIkbd_mousey
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43 .globl _SDL_AtariIkbd_joystick
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44
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45 .globl _SDL_AtariIkbd_enabled
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46
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47 /*--- Install our IKBD vector ---*/
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48
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49 _SDL_AtariIkbdInstall:
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50 moveml d0-d1/a0-a1,sp@-
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51
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52 | Disable interrupts
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53
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54 movew #0x2700,sr
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55
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56 | Save MFP registers used for keyboard
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57
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58 lea 0xfffffa00:w,a0
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59 btst #6,a0@(0x09)
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60 sne ikbd_ierb
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61 btst #6,a0@(0x15)
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62 sne ikbd_imrb
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63
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64 | Set our routine
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65
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66 movel 0x118:w,old_ikbd
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67 movel #ikbd,0x118:w
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68 bset #6,0xfffffa09:w | IERB
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69 bset #6,0xfffffa15:w | IMRB
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70
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71 | Set mouse relative mode
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72
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73 moveb #8,0xfffffc02:w
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74
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75 | Reenable interrupts
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76
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77 movew #0x2300,sr
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78
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79 | Interrupts done
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80
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81 movew #0xffff,_SDL_AtariIkbd_enabled
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82
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83 moveml sp@+,d0-d1/a0-a1
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84 rts
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85
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86 /*--- Uninstall our IKBD vector ---*/
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87
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88 _SDL_AtariIkbdUninstall:
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89 movel a0,sp@-
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90
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91 | Disable interrupts
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93 movew #0x2700,sr
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94
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95 | Restore previous MFP registers
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96
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97 lea 0xfffffa00:w,a0
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98
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99 bclr #6,a0@(0x09)
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100 tstb ikbd_ierb
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101 beqs ikbd_restoreierb
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102 bset #6,a0@(0x09)
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103 ikbd_restoreierb:
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104
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105 bclr #6,a0@(0x15)
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106 tstb ikbd_imrb
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107 beqs ikbd_restoreimrb
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108 bset #6,a0@(0x15)
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109 ikbd_restoreimrb:
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110
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111 movel old_ikbd,0x118:w
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112
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113 | Clear keyboard buffer
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114
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115 lea 0xfffffc00:w,a0
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116 ikbd_videbuffer:
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117 btst #0,a0@
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118 beqs ikbd_finbuffer
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119 tstb a0@(0x02)
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120 bras ikbd_videbuffer
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121 ikbd_finbuffer:
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122
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123 | Reenable interrupts
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124
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125 movew #0x2300,sr
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126
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127 movel sp@+,a0
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128 rts
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129
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130 .bss
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131
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132 .even
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133 .comm ikbd_ierb,1
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134 .comm ikbd_imrb,1
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136 /*--- Our custom IKBD vector ---*/
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137
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138 .text
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139 .even
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140 .ascii "XBRA"
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141 .ascii "LSDL"
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142 .comm old_ikbd,4*1
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143 ikbd:
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144 | Check if source is IKBD or MIDI
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145 btst #0,0xfffffc00.w
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146 beqs ikbd_oldmidi
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diff changeset
147
281
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148 moveml d0-d1/a0,sp@-
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149 moveb 0xfffffc02:w,d0
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150
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diff changeset
151 | Joystick packet ?
281
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152
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
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153 cmpb #0xff,d0
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diff changeset
154 beqs ikbd_yes_joystick
281
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155
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diff changeset
156 | Mouse packet ?
281
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157
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
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158 cmpb #0xf8,d0
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diff changeset
159 bmis ikbd_no_mouse
281
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160 cmpb #0xfc,d0
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161 bpls ikbd_no_mouse
281
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162
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163 | Mouse packet, byte #1
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164
281
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165 ikbd_yes_mouse:
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166 andw #3,d0
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167 movew d0,_SDL_AtariIkbd_mouseb
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168
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169 movel #ikbd_mousex,0x118:w
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170 bras ikbd_endit_stack
281
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171
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172 | Joystick packet, byte #1
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173
281
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174 ikbd_yes_joystick:
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175 movel #ikbd_joystick,0x118:w
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diff changeset
176 bras ikbd_endit_stack
281
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177
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178 | Keyboard press/release
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179
281
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180 ikbd_no_mouse:
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181 moveb d0,d1
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182 lea _SDL_AtariIkbd_keyboard,a0
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183 andw #0x7f,d1
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184 tas d0
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185 spl a0@(0,d1:w)
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186
369dcdb52d70 Call old interrupt when receiving MIDI stuff
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187 | End of interrupt
281
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188
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189 ikbd_endit_stack:
369dcdb52d70 Call old interrupt when receiving MIDI stuff
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190 moveml sp@+,d0-d1/a0
281
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191 ikbd_endit:
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192 bclr #6,0xfffffa11:w
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193 rte
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194
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195 | Call old MIDI interrupt
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196
369dcdb52d70 Call old interrupt when receiving MIDI stuff
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197 ikbd_oldmidi:
369dcdb52d70 Call old interrupt when receiving MIDI stuff
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198 movel old_ikbd,sp@-
369dcdb52d70 Call old interrupt when receiving MIDI stuff
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199 rts
369dcdb52d70 Call old interrupt when receiving MIDI stuff
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200
1082
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201 | Mouse packet, byte #2
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202
281
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203 ikbd_mousex:
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204
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205 | Check if source is IKBD or MIDI
369dcdb52d70 Call old interrupt when receiving MIDI stuff
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206 btst #0,0xfffffc00.w
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207 beqs ikbd_oldmidi
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208
369dcdb52d70 Call old interrupt when receiving MIDI stuff
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209 movew d0,sp@-
281
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210
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211 moveb 0xfffffc02:w,d0
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212 extw d0
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213 addw d0,_SDL_AtariIkbd_mousex
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214
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215 movew sp@+,d0
281
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216
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217 movel #ikbd_mousey,0x118:w
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218 bras ikbd_endit
281
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219
1082
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220 | Mouse packet, byte #3
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221
281
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222 ikbd_mousey:
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223
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224 | Check if source is IKBD or MIDI
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225 btst #0,0xfffffc00.w
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226 beqs ikbd_oldmidi
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diff changeset
227
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diff changeset
228 movew d0,sp@-
281
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229
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parents:
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230 moveb 0xfffffc02:w,d0
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231 extw d0
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232 addw d0,_SDL_AtariIkbd_mousey
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233
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234 movew sp@+,d0
281
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235
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parents:
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236 movel #ikbd,0x118:w
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diff changeset
237 bras ikbd_endit
281
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238
1082
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239 | Joystick packet, byte #2
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240
281
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241 ikbd_joystick:
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242
1081
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243 | Check if source is IKBD or MIDI
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diff changeset
244 btst #0,0xfffffc00.w
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diff changeset
245 beqs ikbd_oldmidi
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parents: 305
diff changeset
246
281
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parents:
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247 moveb 0xfffffc02:w,_SDL_AtariIkbd_joystick+1
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
248
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
249 movel #ikbd,0x118:w
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parents: 305
diff changeset
250 bras ikbd_endit
281
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parents:
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251
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
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parents:
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252 .data
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253
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
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254 .even
305
9c6613983e85 Atari port cleanups from Patrice
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
255 _SDL_AtariIkbd_enabled:
9c6613983e85 Atari port cleanups from Patrice
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parents: 297
diff changeset
256 .word 0
1081
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diff changeset
257
369dcdb52d70 Call old interrupt when receiving MIDI stuff
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parents: 305
diff changeset
258 .bss
369dcdb52d70 Call old interrupt when receiving MIDI stuff
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parents: 305
diff changeset
259
305
9c6613983e85 Atari port cleanups from Patrice
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parents: 297
diff changeset
260 .even
281
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261 .comm _SDL_AtariIkbd_keyboard,128
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diff changeset
262 .comm _SDL_AtariIkbd_mousex,2
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diff changeset
263 .comm _SDL_AtariIkbd_mousey,2
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parents: 305
diff changeset
264 .comm _SDL_AtariIkbd_mouseb,2
369dcdb52d70 Call old interrupt when receiving MIDI stuff
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parents: 305
diff changeset
265 .comm _SDL_AtariIkbd_joystick,2