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91 lines
2.2 KiB
91 lines
2.2 KiB
<?xml version="1.0" ?>
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<!DOCTYPE article PUBLIC "-//KDE//DTD DocBook XML V4.2-Based Variant V1.1//EN"
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"dtd/kdex.dtd" [
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<!ENTITY % addindex "IGNORE">
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<!ENTITY % British-English "INCLUDE"
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> <!-- change language only here -->
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]>
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<article lang="&language;">
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<title
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>I/O Port</title>
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<articleinfo>
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<authorgroup>
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<author
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>&Matthias.Hoelzer-Kluepfel;</author>
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<author
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>&Helge.Deller;</author>
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<author
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>&Duncan.Haldane;</author>
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<author
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>&Mike.McBride;</author>
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<othercredit role="translator"
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><firstname
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>Malcolm</firstname
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><surname
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>Hunter</surname
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><affiliation
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><address
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><email
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>malcolm.hunter@gmx.co.uk</email
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></address
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></affiliation
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><contrib
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>Conversion to British English</contrib
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></othercredit
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>
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</authorgroup>
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<date
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>2002-02-12</date>
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<releaseinfo
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>3.00.00</releaseinfo>
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<keywordset>
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<keyword
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>KDE</keyword>
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<keyword
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>KControl</keyword>
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<keyword
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>ioports</keyword>
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<keyword
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>system information</keyword>
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</keywordset>
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</articleinfo>
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<sect1>
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<title
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>Input/Output Port Information</title>
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<para
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>This page displays information about the I/O ports.</para>
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<para
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>I/O Ports are memory addresses used by the processor for direct communication with a device that has sent an interrupt signal to the processor.</para>
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<para
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>The exchange of commands or data between the processor and the device takes place through the I/O port address of the device, which is a hexadecimal number. No two devices can share the same I/O port. Many devices use multiple I/O port addresses, which are expressed as a range of hexadecimal numbers. </para>
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<note
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><para
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>The exact information displayed is system-dependent. On some systems, I/O port information can not yet be displayed.</para
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></note>
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<para
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>On &Linux;, this information is read from <filename class="devicefile"
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>/proc/ioports</filename
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> which is only available if the <filename class="devicefile"
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>/proc</filename
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> pseudo-filesystem is compiled into the kernel. A list of all currently-registered I/O port regions that are in use is shown.</para>
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<para
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>The first column is the I/O port (or the range of I/O ports), the second column identifies the device that uses these I/O ports.</para>
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<para
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>The user cannot modify any settings on this page.</para>
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</sect1>
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</article>
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