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annotate src/video/ataricommon/SDL_ikbdinterrupt.S @ 4376:40e4536ad0c3 SDL-1.2

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Adapt IKBD asm routine for Coldfire
author Patrice Mandin <patmandin@gmail.com>
date Fri, 06 Nov 2009 22:32:16 +0000
parents a1b03ba2fcd0
children c92927bd421a
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 #if defined(__mcoldfire__)
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46 lea sp@(-16),sp
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47 moveml d0-d1/a0-a1,sp@
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48 #else
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49 moveml d0-d1/a0-a1,sp@-
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50 #endif
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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 #if defined(__mcoldfire__)
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61 sne d0
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62 move.b d0,ikbd_ierb
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63 #else
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64 sne ikbd_ierb
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65 #endif
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66 btst #6,a0@(0x15)
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67 #if defined(__mcoldfire__)
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68 sne d0
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69 move.b d0,ikbd_imrb
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70 #else
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71 sne ikbd_imrb
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72 #endif
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73
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74 | Set our routine
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75
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76 #if defined(__mcoldfire__)
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77 movel 0x118:w,d0
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78 movel d0,old_ikbd
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79 lea ikbd,a0
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80 movel a0,0x118:w
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81 #else
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82 movel 0x118:w,old_ikbd
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83 movel #ikbd,0x118:w
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84 bset #6,0xfffffa09:w | IERB
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85 bset #6,0xfffffa15:w | IMRB
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86 #endif
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87
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88 | Set mouse relative mode
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89
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90 #if defined(__mcoldfire__)
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91 moveql #8,d0
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92 moveb d0,0xfffffc02:w
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93 #else
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94 moveb #8,0xfffffc02:w
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95 #endif
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96
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97 | Reenable interrupts
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98
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99 movew #0x2300,sr
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100
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101 | Interrupts done
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102
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103 #if defined(__mcoldfire__)
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104 movel #0xffff,d0
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105 movew d0,_SDL_AtariIkbd_enabled
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106
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107 moveml sp@,d0-d1/a0-a1
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108 lea sp@(16),sp
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109 #else
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110 movew #0xffff,_SDL_AtariIkbd_enabled
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111
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112 moveml sp@+,d0-d1/a0-a1
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113 #endif
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114 rts
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115
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116 /*--- Uninstall our IKBD vector ---*/
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117
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118 _SDL_AtariIkbdUninstall:
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119 movel a0,sp@-
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120
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121 | Disable interrupts
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122
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123 movew #0x2700,sr
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124
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125 | Restore previous MFP registers
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126
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127 lea 0xfffffa00:w,a0
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128
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129 bclr #6,a0@(0x09)
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130 tstb ikbd_ierb
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131 beqs ikbd_restoreierb
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132 bset #6,a0@(0x09)
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133 ikbd_restoreierb:
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134
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135 bclr #6,a0@(0x15)
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136 tstb ikbd_imrb
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137 beqs ikbd_restoreimrb
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138 bset #6,a0@(0x15)
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139 ikbd_restoreimrb:
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140
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141 #if defined(__mcoldfire__)
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142 movel old_ikbd,a0
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143 movel a0,0x118:w
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144 #else
281
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145 movel old_ikbd,0x118:w
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146 #endif
281
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147
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148 | Clear keyboard buffer
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149
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150 lea 0xfffffc00:w,a0
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151 ikbd_videbuffer:
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152 btst #0,a0@
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153 beqs ikbd_finbuffer
281
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154 tstb a0@(0x02)
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155 bras ikbd_videbuffer
281
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156 ikbd_finbuffer:
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157
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158 | Reenable interrupts
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159
281
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160 movew #0x2300,sr
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161
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162 movel sp@+,a0
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163 rts
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164
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165 .bss
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166
281
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167 .even
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168 .comm ikbd_ierb,1
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169 .comm ikbd_imrb,1
281
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170
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171 /*--- Our custom IKBD vector ---*/
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172
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173 .text
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174 .even
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175 .ascii "XBRA"
287
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176 .ascii "LSDL"
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177 .comm old_ikbd,4*1
281
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178 ikbd:
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179 #if defined(__mcoldfire__)
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180 lea sp@(-12),sp
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181 moveml sp@,d0-d1/a0
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182 #else
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183 moveml d0-d1/a0,sp@-
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184 #endif
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185
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186 | Check if source is IKBD or MIDI
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187 #if defined(__mcoldfire__)
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188 moveql #0,d0
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189 btst d0,0xfffffc00.w
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190 #else
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191 btst #0,0xfffffc00.w
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192 #endif
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193 beqs ikbd_oldmidi
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194
281
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195 moveb 0xfffffc02:w,d0
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196
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197 | Joystick packet ?
281
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198
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199 cmpb #0xff,d0
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200 beqs ikbd_yes_joystick
281
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201
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202 | Mouse packet ?
281
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203
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204 cmpb #0xf8,d0
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205 bmis ikbd_no_mouse
281
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206 cmpb #0xfc,d0
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207 bpls ikbd_no_mouse
281
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208
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209 | Mouse packet, byte #1
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210
281
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211 ikbd_yes_mouse:
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212 #if defined(__mcoldfire__)
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213 andl #3,d0
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214 #else
281
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215 andw #3,d0
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216 #endif
281
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217 movew d0,_SDL_AtariIkbd_mouseb
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218
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219 #if defined(__mcoldfire__)
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220 movel #ikbd_mousex,d0
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221 movel d0,0x118:w
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222 #else
281
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223 movel #ikbd_mousex,0x118:w
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224 #endif
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225 bras ikbd_endit_stack
281
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226
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227 | Joystick packet, byte #1
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228
281
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229 ikbd_yes_joystick:
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230 #if defined(__mcoldfire__)
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231 movel #ikbd_joystick,d0
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232 movel d0,0x118:w
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233 #else
281
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234 movel #ikbd_joystick,0x118:w
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235 #endif
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236 bras ikbd_endit_stack
281
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237
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238 | Keyboard press/release
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239
281
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240 ikbd_no_mouse:
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241 moveb d0,d1
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242 lea _SDL_AtariIkbd_keyboard,a0
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243 #if defined(__mcoldfire__)
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244 andl #0x7f,d1
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245 btst #7,d0
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246 spl d0
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247 moveb d0,a0@(0,d1:l)
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248 #else
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249 andw #0x7f,d1
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250 tas d0
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251 spl a0@(0,d1:w)
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252 #endif
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253
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254 | End of interrupt
281
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255
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256 ikbd_endit_stack:
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257 #if defined(__mcoldfire__)
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258 moveql #6,d0
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259 bclr d0,0xfffffa11:w
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260
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261 moveml sp@,d0-d1/a0
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262 lea sp@(12),sp
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263 #else
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264 moveml sp@+,d0-d1/a0
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265
281
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266 bclr #6,0xfffffa11:w
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267 #endif
281
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268 rte
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269
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270 | Call old MIDI interrupt
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271
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272 ikbd_oldmidi:
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273 #if defined(__mcoldfire__)
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274 moveml sp@,d0-d1/a0
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275 lea sp@(12),sp
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276 #else
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277 moveml sp@+,d0-d1/a0
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278 #endif
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279
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280 movel old_ikbd,sp@-
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281 rts
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282
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283 | Mouse packet, byte #2
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284
281
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285 ikbd_mousex:
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286 #if defined(__mcoldfire__)
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287 lea sp@(-12),sp
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288 moveml sp@,d0-d1/a0
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289 #else
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290 moveml d0-d1/a0,sp@-
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291 #endif
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292
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293 | Check if source is IKBD or MIDI
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294 #if defined(__mcoldfire__)
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295 moveql #0,d0
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296 btst d0,0xfffffc00.w
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297 #else
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298 btst #0,0xfffffc00.w
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299 #endif
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300 beqs ikbd_oldmidi
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301
281
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302 moveb 0xfffffc02:w,d0
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303 extw d0
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304 #if defined(__mcoldfire__)
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305 movew _SDL_AtariIkbd_mousex,d1
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306 addl d1,d0
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307 movew d0,_SDL_AtariIkbd_mousex
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308
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309 movel #ikbd_mousey,d0
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310 movel d0,0x118:w
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311 #else
281
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312 addw d0,_SDL_AtariIkbd_mousex
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313
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314 movel #ikbd_mousey,0x118:w
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315 #endif
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316 bras ikbd_endit_stack
281
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317
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318 | Mouse packet, byte #3
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319
281
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320 ikbd_mousey:
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321 #if defined(__mcoldfire__)
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322 lea sp@(-12),sp
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323 moveml sp@,d0-d1/a0
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324 #else
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325 moveml d0-d1/a0,sp@-
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326 #endif
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327
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328 | Check if source is IKBD or MIDI
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329 #if defined(__mcoldfire__)
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330 moveql #0,d0
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331 btst d0,0xfffffc00.w
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332 #else
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333 btst #0,0xfffffc00.w
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334 #endif
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335 beqs ikbd_oldmidi
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336
281
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337 moveb 0xfffffc02:w,d0
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338 extw d0
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339 #if defined(__mcoldfire__)
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340 movew _SDL_AtariIkbd_mousey,d1
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341 addl d1,d0
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342 movew d0,_SDL_AtariIkbd_mousey
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343
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344 movel #ikbd,d0
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345 movel d0,0x118:w
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346 #else
281
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347 addw d0,_SDL_AtariIkbd_mousey
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348
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349 movel #ikbd,0x118:w
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350 #endif
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351 bras ikbd_endit_stack
281
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352
1082
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353 | Joystick packet, byte #2
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354
281
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355 ikbd_joystick:
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356 #if defined(__mcoldfire__)
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357 lea sp@(-12),sp
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358 moveml sp@,d0-d1/a0
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359 #else
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360 moveml d0-d1/a0,sp@-
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361 #endif
1082
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362
1081
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diff changeset
363 | Check if source is IKBD or MIDI
4376
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diff changeset
364 #if defined(__mcoldfire__)
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365 moveql #0,d0
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366 btst d0,0xfffffc00.w
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367 #else
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368 btst #0,0xfffffc00.w
4376
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369 #endif
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370 beqs ikbd_oldmidi
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diff changeset
371
4376
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372 #if defined(__mcoldfire__)
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373 moveb 0xfffffc02:w,d0
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diff changeset
374 moveb d0,_SDL_AtariIkbd_joystick+1
40e4536ad0c3 Adapt IKBD asm routine for Coldfire
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diff changeset
375
40e4536ad0c3 Adapt IKBD asm routine for Coldfire
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diff changeset
376 movel #ikbd,d0
40e4536ad0c3 Adapt IKBD asm routine for Coldfire
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377 movel d0,0x118:w
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diff changeset
378
40e4536ad0c3 Adapt IKBD asm routine for Coldfire
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379 bra ikbd_endit_stack
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diff changeset
380 #else
281
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
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381 moveb 0xfffffc02:w,_SDL_AtariIkbd_joystick+1
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parents:
diff changeset
382
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
383 movel #ikbd,0x118:w
4376
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diff changeset
384
40e4536ad0c3 Adapt IKBD asm routine for Coldfire
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diff changeset
385 bras ikbd_endit_stack
40e4536ad0c3 Adapt IKBD asm routine for Coldfire
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diff changeset
386 #endif
281
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
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parents:
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387
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
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388 .data
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parents:
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389
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
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diff changeset
390 .even
305
9c6613983e85 Atari port cleanups from Patrice
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diff changeset
391 _SDL_AtariIkbd_enabled:
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diff changeset
392 .word 0
1081
369dcdb52d70 Call old interrupt when receiving MIDI stuff
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diff changeset
393
369dcdb52d70 Call old interrupt when receiving MIDI stuff
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diff changeset
394 .bss
369dcdb52d70 Call old interrupt when receiving MIDI stuff
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diff changeset
395
305
9c6613983e85 Atari port cleanups from Patrice
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parents: 297
diff changeset
396 .even
281
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
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397 .comm _SDL_AtariIkbd_keyboard,128
1081
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diff changeset
398 .comm _SDL_AtariIkbd_mousex,2
369dcdb52d70 Call old interrupt when receiving MIDI stuff
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diff changeset
399 .comm _SDL_AtariIkbd_mousey,2
369dcdb52d70 Call old interrupt when receiving MIDI stuff
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diff changeset
400 .comm _SDL_AtariIkbd_mouseb,2
369dcdb52d70 Call old interrupt when receiving MIDI stuff
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diff changeset
401 .comm _SDL_AtariIkbd_joystick,2