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<title>Asuro: bios_data_area</title>
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<h1 class="unit">Unit bios_data_area</h1>
<div class="sections">
<div class="one_section"><a class="section" href="#PasDoc-Description">Description</a></div><div class="one_section">Uses</div><div class="one_section"><a class="section" href="#PasDoc-Classes">Classes, Interfaces, Objects and Records</a></div><div class="one_section"><a class="section" href="#PasDoc-FuncsProcs">Functions and Procedures</a></div><div class="one_section"><a class="section" href="#PasDoc-Types">Types</a></div><div class="one_section"><a class="section" href="#PasDoc-Constants">Constants</a></div><div class="one_section"><a class="section" href="#PasDoc-Variables">Variables</a></div></div>
<span id="PasDoc-Description"></span><h2 class="description">Description</h2>
<p>
Include-><code>BIOS_Data_Area</code> - Data Structures Controlled by the BIOS.
<p></p>
<span id="PasDoc-Uses"></span><h2 class="overview">Overview</h2>
<span id="PasDoc-Classes"></span><h3 class="cio">Classes, Interfaces, Objects and Records</h3>
<table class="classestable wide_list">
<tr class="listheader">
<th class="itemname">Name</th>
<th class="itemdesc">Description</th>
</tr>
<tr class="list">
<td class="itemname">Record <a class="bold" href="bios_data_area.TCounters.html"><code>TCounters</code></a></td>
<td class="itemdesc"> </td>
</tr>
</table>
<span id="PasDoc-FuncsProcs"></span><h3 class="summary">Functions and Procedures</h3>
<table class="summary wide_list">
<tr class="list">
<td class="itemcode"><code>procedure <b><a href="bios_data_area.html#tick_update">tick_update</a></b>(data : <a href="system.html#Void">void</a>);</code></td>
</tr>
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<span id="PasDoc-Types"></span><h3 class="summary">Types</h3>
<table class="summary wide_list">
<tr class="list">
<td class="itemcode"><code><b><a href="bios_data_area.html#TBDA">TBDA</a></b> = bitpacked record
<a href="serial.html#COM1">COM1</a> : <a href="system.html#uInt16">uint16</a>;
COM2 : <a href="system.html#uInt16">uint16</a>;
COM3 : <a href="system.html#uInt16">uint16</a>;
COM4 : <a href="system.html#uInt16">uint16</a>;
LPT1 : <a href="system.html#uInt16">uint16</a>;
LPT2 : <a href="system.html#uInt16">uint16</a>;
LPT3 : <a href="system.html#uInt16">uint16</a>;
EBDA : <a href="system.html#uInt16">uint16</a>;
Hardware_Flags : <a href="system.html#uInt16">uint16</a>;
Keyboard_Flags : <a href="system.html#uInt16">uint16</a>;
Keyboard_Buffer : ARRAY[0..31] OF <a href="system.html#uInt8">uint8</a>;
Display_Mode : <a href="system.html#uInt8">uint8</a>;
BaseIO : <a href="system.html#uInt16">uint16</a>;
Ticks : <a href="system.html#uInt16">uint16</a>;
HDD_Count : <a href="system.html#uInt8">uint8</a>;
Keyboard_Start : <a href="system.html#uInt16">uint16</a>;
Keyboard_End : <a href="system.html#uInt16">uint16</a>;
Keyboard_State : <a href="system.html#uInt8">uint8</a>;
end;</code></td>
</tr>
<tr class="list2">
<td class="itemcode"><code><b><a href="bios_data_area.html#PBDA">PBDA</a></b> = ˆ<a href="bios_data_area.html#TBDA">TBDA</a>;</code></td>
</tr>
<tr class="list">
<td class="itemcode"><code><b><a href="bios_data_area.html#TMCFG">TMCFG</a></b> = bitpacked record
Signature : Array[0..3] of Char;
Table_Length : <a href="system.html#uInt32">uint32</a>;
Revision : Byte;
Checksum : Byte;
OEM_ID : Array[0..5] of Byte;
OEM_Table_ID : <a href="system.html#uInt64">uint64</a>;
OEM_Revision : <a href="system.html#uInt32">uint32</a>;
Creator_ID : <a href="system.html#uInt32">uint32</a>;
Creator_Revision : <a href="system.html#uInt32">uint32</a>;
Reserved : <a href="system.html#uInt64">uint64</a>;
end;</code></td>
</tr>
<tr class="list2">
<td class="itemcode"><code><b><a href="bios_data_area.html#PMCFG">PMCFG</a></b> = ˆ<a href="bios_data_area.html#TMCFG">TMCFG</a>;</code></td>
</tr>
</table>
<span id="PasDoc-Constants"></span><h3 class="summary">Constants</h3>
<table class="summary wide_list">
<tr class="list">
<td class="itemcode"><code><b><a href="bios_data_area.html#BDA">BDA</a></b> : <a href="bios_data_area.html#PBDA">PBDA</a> = <a href="bios_data_area.html#PBDA">PBDA</a>($C0000400);</code></td>
</tr>
</table>
<span id="PasDoc-Variables"></span><h3 class="summary">Variables</h3>
<table class="summary wide_list">
<tr class="list">
<td class="itemcode"><code><b><a href="bios_data_area.html#Counters">Counters</a></b>: <a href="bios_data_area.TCounters.html">TCounters</a>;</code></td>
</tr>
</table>
<h2 class="description">Description</h2>
<h3 class="detail">Functions and Procedures</h3>
<table class="detail wide_list">
<tr class="list">
<td class="itemcode"><span id="tick_update"></span><code>procedure <b>tick_update</b>(data : <a href="system.html#Void">void</a>);</code></td>
</tr>
<tr><td colspan="1">
</td></tr>
</table>
<h3 class="detail">Types</h3>
<table class="detail wide_list">
<tr class="list">
<td class="itemcode"><span id="TBDA"></span><code><b>TBDA</b> = bitpacked record
<a href="serial.html#COM1">COM1</a> : <a href="system.html#uInt16">uint16</a>;
COM2 : <a href="system.html#uInt16">uint16</a>;
COM3 : <a href="system.html#uInt16">uint16</a>;
COM4 : <a href="system.html#uInt16">uint16</a>;
LPT1 : <a href="system.html#uInt16">uint16</a>;
LPT2 : <a href="system.html#uInt16">uint16</a>;
LPT3 : <a href="system.html#uInt16">uint16</a>;
EBDA : <a href="system.html#uInt16">uint16</a>;
Hardware_Flags : <a href="system.html#uInt16">uint16</a>;
Keyboard_Flags : <a href="system.html#uInt16">uint16</a>;
Keyboard_Buffer : ARRAY[0..31] OF <a href="system.html#uInt8">uint8</a>;
Display_Mode : <a href="system.html#uInt8">uint8</a>;
BaseIO : <a href="system.html#uInt16">uint16</a>;
Ticks : <a href="system.html#uInt16">uint16</a>;
HDD_Count : <a href="system.html#uInt8">uint8</a>;
Keyboard_Start : <a href="system.html#uInt16">uint16</a>;
Keyboard_End : <a href="system.html#uInt16">uint16</a>;
Keyboard_State : <a href="system.html#uInt8">uint8</a>;
end;</code></td>
</tr>
<tr><td colspan="1">
</td></tr>
</table>
<table class="detail wide_list">
<tr class="list">
<td class="itemcode"><span id="PBDA"></span><code><b>PBDA</b> = ˆ<a href="bios_data_area.html#TBDA">TBDA</a>;</code></td>
</tr>
<tr><td colspan="1">
</td></tr>
</table>
<table class="detail wide_list">
<tr class="list">
<td class="itemcode"><span id="TMCFG"></span><code><b>TMCFG</b> = bitpacked record
Signature : Array[0..3] of Char;
Table_Length : <a href="system.html#uInt32">uint32</a>;
Revision : Byte;
Checksum : Byte;
OEM_ID : Array[0..5] of Byte;
OEM_Table_ID : <a href="system.html#uInt64">uint64</a>;
OEM_Revision : <a href="system.html#uInt32">uint32</a>;
Creator_ID : <a href="system.html#uInt32">uint32</a>;
Creator_Revision : <a href="system.html#uInt32">uint32</a>;
Reserved : <a href="system.html#uInt64">uint64</a>;
end;</code></td>
</tr>
<tr><td colspan="1">
</td></tr>
</table>
<table class="detail wide_list">
<tr class="list">
<td class="itemcode"><span id="PMCFG"></span><code><b>PMCFG</b> = ˆ<a href="bios_data_area.html#TMCFG">TMCFG</a>;</code></td>
</tr>
<tr><td colspan="1">
</td></tr>
</table>
<h3 class="detail">Constants</h3>
<table class="detail wide_list">
<tr class="list">
<td class="itemcode"><span id="BDA"></span><code><b>BDA</b> : <a href="bios_data_area.html#PBDA">PBDA</a> = <a href="bios_data_area.html#PBDA">PBDA</a>($C0000400);</code></td>
</tr>
<tr><td colspan="1">
</td></tr>
</table>
<h3 class="detail">Variables</h3>
<table class="detail wide_list">
<tr class="list">
<td class="itemcode"><span id="Counters"></span><code><b>Counters</b>: <a href="bios_data_area.TCounters.html">TCounters</a>;</code></td>
</tr>
<tr><td colspan="1">
</td></tr>
</table>
<h2 class="authors">Author</h2>
<ul class="authors">
<li>Kieron Morris <<a href="mailto:kjm@kieronmorris.me">kjm@kieronmorris.me</a>></li>
</ul>
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