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1 <HTML
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2 ><HEAD
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3 ><TITLE
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4 >CD-ROM</TITLE
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5 ><META
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6 NAME="GENERATOR"
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7 CONTENT="Modular DocBook HTML Stylesheet Version 1.61
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8 "><LINK
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9 REL="HOME"
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10 TITLE="SDL Library Documentation"
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11 HREF="index.html"><LINK
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12 REL="UP"
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13 TITLE="SDL Reference"
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14 HREF="reference.html"><LINK
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15 REL="PREVIOUS"
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16 TITLE="SDL_CloseAudio"
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17 HREF="sdlcloseaudio.html"><LINK
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18 REL="NEXT"
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19 TITLE="SDL_CDNumDrives"
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20 HREF="sdlcdnumdrives.html"><META
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21 NAME="KEYWORD"
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22 CONTENT="cdrom"><META
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23 NAME="KEYWORD"
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24 CONTENT="function"></HEAD
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25 ><BODY
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26 CLASS="CHAPTER"
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27 BGCOLOR="#FFF8DC"
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28 TEXT="#000000"
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29 LINK="#0000ee"
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30 VLINK="#551a8b"
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31 ALINK="#ff0000"
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32 ><DIV
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33 CLASS="NAVHEADER"
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34 ><TABLE
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35 WIDTH="100%"
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36 BORDER="0"
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37 CELLPADDING="0"
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38 CELLSPACING="0"
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39 ><TR
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40 ><TH
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41 COLSPAN="3"
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42 ALIGN="center"
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43 >SDL Library Documentation</TH
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44 ></TR
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45 ><TR
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46 ><TD
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47 WIDTH="10%"
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48 ALIGN="left"
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49 VALIGN="bottom"
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50 ><A
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51 HREF="sdlcloseaudio.html"
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52 >Prev</A
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53 ></TD
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54 ><TD
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55 WIDTH="80%"
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56 ALIGN="center"
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57 VALIGN="bottom"
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58 ></TD
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59 ><TD
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60 WIDTH="10%"
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61 ALIGN="right"
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62 VALIGN="bottom"
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63 ><A
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64 HREF="sdlcdnumdrives.html"
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65 >Next</A
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66 ></TD
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67 ></TR
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68 ></TABLE
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69 ><HR
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70 ALIGN="LEFT"
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71 WIDTH="100%"></DIV
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72 ><DIV
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73 CLASS="CHAPTER"
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74 ><H1
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75 ><A
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76 NAME="CDROM"
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77 >Chapter 11. CD-ROM</A
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78 ></H1
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79 ><DIV
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80 CLASS="TOC"
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81 ><DL
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82 ><DT
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83 ><B
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84 >Table of Contents</B
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85 ></DT
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86 ><DT
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87 ><A
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88 HREF="sdlcdnumdrives.html"
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89 >SDL_CDNumDrives</A
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90 > — Returns the number of CD-ROM drives on the system.</DT
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91 ><DT
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92 ><A
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93 HREF="sdlcdname.html"
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94 >SDL_CDName</A
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95 > — Returns a human-readable, system-dependent identifier for the CD-ROM.</DT
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96 ><DT
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97 ><A
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98 HREF="sdlcdopen.html"
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99 >SDL_CDOpen</A
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100 > — Opens a CD-ROM drive for access.</DT
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101 ><DT
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102 ><A
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103 HREF="sdlcdstatus.html"
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104 >SDL_CDStatus</A
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105 > — Returns the current status of the given drive.</DT
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106 ><DT
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107 ><A
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108 HREF="sdlcdplay.html"
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109 >SDL_CDPlay</A
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110 > — Play a CD</DT
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111 ><DT
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112 ><A
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113 HREF="sdlcdplaytracks.html"
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114 >SDL_CDPlayTracks</A
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115 > — Play the given CD track(s)</DT
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116 ><DT
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117 ><A
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118 HREF="sdlcdpause.html"
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119 >SDL_CDPause</A
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120 > — Pauses a CDROM</DT
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121 ><DT
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122 ><A
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123 HREF="sdlcdresume.html"
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124 >SDL_CDResume</A
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125 > — Resumes a CDROM</DT
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126 ><DT
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127 ><A
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128 HREF="sdlcdstop.html"
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129 >SDL_CDStop</A
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130 > — Stops a CDROM</DT
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131 ><DT
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132 ><A
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133 HREF="sdlcdeject.html"
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134 >SDL_CDEject</A
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135 > — Ejects a CDROM</DT
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136 ><DT
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137 ><A
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138 HREF="sdlcdclose.html"
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139 >SDL_CDClose</A
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140 > — Closes a SDL_CD handle</DT
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141 ><DT
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142 ><A
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143 HREF="sdlcd.html"
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144 >SDL_CD</A
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145 > — CDROM Drive Information</DT
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146 ><DT
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147 ><A
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148 HREF="sdlcdtrack.html"
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149 >SDL_CDtrack</A
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150 > — CD Track Information Structure</DT
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151 ></DL
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152 ></DIV
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153 ><P
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154 >SDL supports audio control of up to 32 local CD-ROM drives at once.</P
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155 ><P
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156 >You use this API to perform all the basic functions of a CD player,
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157 including listing the tracks, playing, stopping, and ejecting the CD-ROM.
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158 (Currently, multi-changer CD drives are not supported.)</P
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159 ><P
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160 >Before you call any of the SDL CD-ROM functions, you must first call
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161 "<TT
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162 CLASS="FUNCTION"
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163 >SDL_Init(SDL_INIT_CDROM)</TT
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164 >", which scans the system for
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165 CD-ROM drives, and sets the program up for audio control. Check the
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166 return code, which should be <SPAN
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167 CLASS="RETURNVALUE"
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168 >0</SPAN
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169 >, to see if there
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170 were any errors in starting up.</P
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171 ><P
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172 >After you have initialized the library, you can find out how many drives
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173 are available using the <TT
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174 CLASS="FUNCTION"
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175 >SDL_CDNumDrives()</TT
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176 > function.
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177 The first drive listed is the system default CD-ROM drive. After you have
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178 chosen a drive, and have opened it with <TT
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179 CLASS="FUNCTION"
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180 >SDL_CDOpen()</TT
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181 >,
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182 you can check the status and start playing if there's a CD in the drive.</P
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183 ><P
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184 >A CD-ROM is organized into one or more tracks, each consisting of a certain
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185 number of "frames". Each frame is ~2K in size, and at normal playing speed,
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186 a CD plays 75 frames per second. SDL works with the number of frames on a
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187 CD, but this can easily be converted to the more familiar minutes/seconds
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188 format by using the <TT
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189 CLASS="FUNCTION"
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190 >FRAMES_TO_MSF()</TT
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191 > macro.</P
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192 ></DIV
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193 ><DIV
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194 CLASS="NAVFOOTER"
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195 ><HR
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196 ALIGN="LEFT"
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197 WIDTH="100%"><TABLE
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198 WIDTH="100%"
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199 BORDER="0"
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200 CELLPADDING="0"
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201 CELLSPACING="0"
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202 ><TR
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203 ><TD
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204 WIDTH="33%"
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205 ALIGN="left"
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206 VALIGN="top"
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207 ><A
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208 HREF="sdlcloseaudio.html"
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209 >Prev</A
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210 ></TD
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211 ><TD
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212 WIDTH="34%"
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213 ALIGN="center"
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214 VALIGN="top"
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215 ><A
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216 HREF="index.html"
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217 >Home</A
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218 ></TD
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219 ><TD
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220 WIDTH="33%"
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221 ALIGN="right"
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222 VALIGN="top"
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223 ><A
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224 HREF="sdlcdnumdrives.html"
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225 >Next</A
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226 ></TD
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227 ></TR
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228 ><TR
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229 ><TD
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230 WIDTH="33%"
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231 ALIGN="left"
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232 VALIGN="top"
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233 >SDL_CloseAudio</TD
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234 ><TD
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235 WIDTH="34%"
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236 ALIGN="center"
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237 VALIGN="top"
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238 ><A
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239 HREF="reference.html"
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240 >Up</A
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241 ></TD
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242 ><TD
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243 WIDTH="33%"
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244 ALIGN="right"
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245 VALIGN="top"
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246 >SDL_CDNumDrives</TD
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247 ></TR
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248 ></TABLE
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249 ></DIV
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250 ></BODY
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251 ></HTML
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252 > |
