Chloe Stars
233 lines
9.7 KiB
HTML
233 lines
9.7 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml"><!-- InstanceBegin template="/Templates/Template.dwt" codeOutsideHTMLIsLocked="false" -->
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<title>PokeMini Documentation</title>
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<style type="text/css">
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<!--
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body {
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font: 100% Verdana, Arial, Helvetica, sans-serif;
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#container {
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clear: both;
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width: 52em;
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background: #FFFFFF;
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text-align: left;
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#sidebar {
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float: left;
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width: 12em;
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padding: 16px 0px;
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font-size: 0.75em;
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}
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#sidebar h3, #sidebar p {
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margin-left: 10px;
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margin-right: 10px;
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}
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#mainContent {
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margin: 0em 1.5em 0em 10em;
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}
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clear: both;
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height: 0;
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.printfooter {
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border: 1px solid #000000;
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background: #F0F0F0;
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}
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.smallfnt pre {font-size: 1.2em;}
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a:link {color:#930;}
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a:hover {color:#C63;}
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a:active {color:#C99;}
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.code_comm {color: #777;}
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.code_def {color: #690;}
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.code_cptr {color: #848;}
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.code_cvar {color: #488;}
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.code_dire {color: #069; font-weight:bold;}
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.code_macro {color: #096; font-weight:bold;}
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.code_func {color: #696; font-weight:bold;}
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.code_opc {color: #663; font-weight:bold;}
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-->
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</style>
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<script type="text/javascript">
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function InstructionSet_CheckItem()
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{
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var icoEl = document.getElementById('InstructionSet_Ico');
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var divEl = document.getElementById('InstructionSet_Div');
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if (divEl.style.display == "none") {
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icoEl.alt = "-";
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icoEl.src = "ico_minus.gif";
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divEl.style.display = "inline";
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} else {
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icoEl.alt = "+";
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icoEl.src = "ico_plus.gif";
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divEl.style.display = "none";
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}
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}
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</script>
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<!-- InstanceBeginEditable name="Collapse_InstructionSet" -->
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<script type="text/javascript">
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window.onload = InstructionSet_CheckItem;
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<!-- InstanceEndEditable -->
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<!-- InstanceBeginEditable name="head" --><!-- InstanceEndEditable -->
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</head><body>
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<div id="container">
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<div id="sidebar">
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<h3 style="text-align:center"><img src="logo.png" alt="Logo" width="41" height="55" /><br />PokeMini</h3>
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<p><a href="index.html">Overview</a></p>
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<p><a href="http://code.google.com/p/pokemini/">Website</a></p>
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<p><a href="history.html">History</a></p>
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<p><a href="keys_info.html">Keys and Info</a></p>
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<p><a href="commandline.html">Command-Line</a></p>
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<p><a href="about_links.html">About / Links</a></p>
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<h3 style="text-align:center">Libraries</h3>
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<p><a href="LIB_pm_init.html">pm_init</a></p>
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<p><a href="LIB_pm_music.html">pm_music</a></p>
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<h3 style="text-align:center">Tools</h3>
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<p><a href="TOOLS_colormapper.html">Color Mapper</a></p>
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<p><a href="TOOLS_ImgConv.html">Image Converter</a></p>
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<p><a href="TOOLS_MusicConv.html">Music Converter</a></p>
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<p>Last Updated:<br />
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<strong>Jun. 12, 2014</strong></p>
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<br /><br />
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<h3 style="text-align:center"><img src="cpudie.gif" alt="CPU Die" width="73" height="55" /><br />
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Hardware</h3>
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<p><a href="Minx_Cpu.html">Minx CPU</a></p>
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<p><img src="ico_minus.gif" alt="-" name="InstructionSet_Ico" width="11" height="11" id="InstructionSet_Ico" onclick="javascript:InstructionSet_CheckItem()" /> <a href="PM_InstructionList.html">Instruction Set:</a></p>
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<div id="InstructionSet_Div">
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<ul>
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<li><a href="PM_Opc_NOP.html">NOP</a></li>
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<li><a href="PM_Opc_MOV8.html">MOV (8-Bits)</a></li>
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<li><a href="PM_Opc_MOV16.html">MOV (16-Bits)</a></li>
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<li><a href="PM_Opc_ADD8.html">ADD (8-Bits)</a></li>
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<li><a href="PM_Opc_ADD16.html">ADD (16-Bits)</a></li>
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<li><a href="PM_Opc_SUB8.html">SUB (8-Bits)</a></li>
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<li><a href="PM_Opc_SUB16.html">SUB (16-Bits)</a></li>
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<li><a href="PM_Opc_ADC8.html">ADC (8-Bits)</a></li>
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<li><a href="PM_Opc_ADC16.html">ADC (16-Bits)</a></li>
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<li><a href="PM_Opc_SBC8.html">SBC (8-Bits)</a></li>
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<li><a href="PM_Opc_SBC16.html">SBC (16-Bits)</a></li>
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<li><a href="PM_Opc_CMP8.html">CMP (8-Bits)</a></li>
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<li><a href="PM_Opc_CMP16.html">CMP (16-Bits)</a></li>
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<li><a href="PM_Opc_INC.html">INC</a></li>
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<li><a href="PM_Opc_DEC.html">DEC</a></li>
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<li><a href="PM_Opc_NEG.html">NEG</a></li>
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<li><a href="PM_Opc_MUL.html">MUL</a></li>
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<li><a href="PM_Opc_DIV.html">DIV</a></li>
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<li><a href="PM_Opc_TST.html">TST</a></li>
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<li><a href="PM_Opc_AND.html">AND</a></li>
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<li><a href="PM_Opc_OR.html">OR</a></li>
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<li><a href="PM_Opc_XOR.html">XOR</a></li>
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<li><a href="PM_Opc_NOT.html">NOT</a></li>
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<li><a href="PM_Opc_SHL.html">SHL</a></li>
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<li><a href="PM_Opc_SAL.html">SAL</a></li>
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<li><a href="PM_Opc_SHR.html">SHR</a></li>
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<li><a href="PM_Opc_SAR.html">SAR</a></li>
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<li><a href="PM_Opc_ROL.html">ROL</a></li>
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<li><a href="PM_Opc_ROLC.html">ROLC</a></li>
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<li><a href="PM_Opc_ROR.html">ROR</a></li>
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<li><a href="PM_Opc_RORC.html">RORC</a></li>
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<li><a href="PM_Opc_XCHG.html">XCHG</a></li>
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<li><a href="PM_Opc_PACK.html">PACK</a></li>
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<li><a href="PM_Opc_UNPACK.html">UNPACK</a></li>
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<li><a href="PM_Opc_SWAP.html">SWAP</a></li>
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<li><a href="PM_Opc_EX.html">EX</a></li>
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<li><a href="PM_Opc_PUSH.html">PUSH</a></li>
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<li><a href="PM_Opc_POP.html">POP</a></li>
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<li><a href="PM_Opc_CALL.html">CALL</a></li>
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<li><a href="PM_Opc_JMP.html">JMP</a></li>
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<li><a href="PM_Opc_RET.html">RET</a></li>
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<li><a href="PM_Opc_HALT.html">HALT</a></li>
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<li><a href="PM_Opc_STOP.html">STOP</a></li>
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</ul>
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</div>
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<p><a href="PM_Memory.html">Memory Map</a></p>
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<p><a href="PM_Cartridge.html">Cartridge </a></p>
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<p><a href="PM_RAM.html">RAM</a></p>
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<p><a href="PM_IRQBios.html">Interrupt / BIOS</a></p>
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<p><a href="PM_Registers.html">Hardware Registers</a></p>
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<p><a href="PM_Timers.html">Timers</a></p>
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<p><a href="PM_IO_Port.html">Hardware I/O Port</a></p>
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<p><a href="PM_Audio.html">Audio / Sound</a></p>
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<p><a href="PM_PRC.html">PRC (Program Rendering Chip)</a></p>
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<p><a href="LCD_Controller.html">LCD Controller</a></p>
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<p><a href="PM_Pinouts.html">Cartridge Pinsout</a></p>
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<p>Last Updated:<br />
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<strong>Dec. 16, 2011</strong></p>
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</div>
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<div id="mainContent">
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<!-- InstanceBeginEditable name="Content" -->
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<h1>Audio / Sound </h1>
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<h2>Overview</h2>
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<p>Single-channel square-wave with adjustable pulse-width. </p>
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<p>3 Levels of volume: 0%, 50%, 100% </p>
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<pre> <a href="PM_Registers.html" title="PM Registers">Register 0x71, Bit 0 to 1</a>
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0 = 0% (Silence)
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1 = 50%
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2 = 50%
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3 = 100% (Full volume)
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</pre>
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<p>Can read back timer values (since sound is assigned to <a href="PM_Timers.html" title="Timers">Timer 3</a>). </p>
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<p>To hear sound, you must: </p>
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<ul>
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<li> Enable Timer 3 (with <a href="PM_Registers.html" title="PM Registers">Registers 0x19, 0x1C, 0x1D, 0x48 and 0x49</a>, check <a href="http://wiki.sublab.net/index.php/Timers" title="Timers">Timers</a>) </li>
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<li> Configure Timer 3 with the Preset & Pivot (Based of the frequency and pulse-width) (with <a href="PM_Registers.html" title="PM Registers">Registers 0x4A to 0x4D</a>, check <a href="PM_Timers.html" title="Timers">Timers</a>) </li>
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<li> Set volume to 50% or 100% (with <a href="PM_Registers.html" title="PM Registers">Register 0x71</a>) </li>
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<li> NOTE: Pulse of 0% or 100% will not be audible </li>
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</ul>
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<p>Some useful information: </p>
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<ul>
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<li> To generate Square-Wave, use Timer 3 Pivot with half the value of the Timer 3 Preset. </li>
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<li> Commercial games use very small Pulse-Width length to generate weak sounds (for example when Music Volume is 25%). </li>
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</ul>
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<h2>Formulas</h2>
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<p>Timer3_Frequency = The Timer 3 counting speed in Hz (Check <a href="PM_Timers.html" title="Timers">Timers</a>) </p>
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<p>Sound_Frequency = The frequency of the note in Hz </p>
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<p>Preset_Value = Timer 3 Preset value (to be written in <a href="PM_Registers.html" title="PM Registers">Registers 0x4A and 0x4B</a>) </p>
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<p>Sound_Pivot = Timer 3 Pivot value (to be written in <a href="PM_Registers.html" title="PM Registers">Registers 0x4C and 0x4D</a>) </p>
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<p>Pulse_Width = Pulse-Width from 0.0 to 1.0 (e.g. 0.0 = 0%, 0.5 = 50% (Square), 1.0 = 100%) </p>
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<h3><span class="mw-headline" id="Sound_Frequency_into_Timer_3_Preset">Sound Frequency into Timer 3 Preset </span></h3>
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<p>Preset_Value = (Timer3_Frequency / Sound_Frequency) - 1 </p>
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<h3><span class="mw-headline" id="Timer_3_Preset_into_Sound_Frequency">Timer 3 Preset into Sound Frequency </span></h3>
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<p>Sound_Frequency = Timer3_Frequency / (Preset_Value + 1) </p>
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<h3><span class="mw-headline" id="Pulse-Width_into_Sound-Pivot">Pulse-Width into Sound-Pivot </span></h3>
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<p>Sound_Pivot = Preset_Value * Pulse_Width </p>
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<h3><span class="mw-headline" id="Sound-Pivot_into_Pulse-Width">Sound-Pivot into Pulse-Width </span></h3>
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<p>Pulse_Width = Sound_Pivot / Preset_Value </p>
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<div class="printfooter"> Retrieved from "<a href="http://wiki.sublab.net/index.php/PM_Audio">http://wiki.sublab.net/index.php/PM_Audio</a>"</div>
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<!-- InstanceEndEditable -->
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<span class="clearfloat"></span>
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</div>
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</div>
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<p class="copyright">© 2011-2015 by JustBurn - Hardware documentation copy from Sublab by Team-Pokémé</p>
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</body>
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