<?xml version="1.0" ?> <!DOCTYPE article PUBLIC "-//KDE//DTD DocBook XML V4.2-Based Variant V1.1//EN" "dtd/kdex.dtd" [ <!ENTITY % addindex "IGNORE"> <!ENTITY % English "INCLUDE" > <!-- change language only here --> ]> <article lang="&language;"> <title><acronym>DMA</acronym> Channel Information</title> <articleinfo> <authorgroup> <author>&Matthias.Hoelzer-Kluepfel;</author> <author>&Helge.Deller;</author> <author>&Duncan.Haldane;</author> <author>&Mike.McBride;</author> <!-- TRANS:ROLES_OF_TRANSLATORS --> </authorgroup> <date>2002-02-12</date> <releaseinfo>3.00.00</releaseinfo> <keywordset> <keyword>KDE</keyword> <keyword>KControl</keyword> <keyword>DMA</keyword> <keyword>system information</keyword> </keywordset> </articleinfo> <sect1> <title><acronym>DMA</acronym> Channel Information</title> <para> This page displays information about the <acronym>DMA</acronym> (Direct Memory Access) Channels. A <acronym>DMA</acronym> channel is a direct connection that allows devices to transfer data to and from memory without going through the processor. Typically, i386-architecture systems (<acronym>PC</acronym>'s) have eight <acronym>DMA</acronym> channels (0-7).</para> <note> <para> The exact information displayed is system-dependent. On some systems, <acronym>DMA</acronym> Channel information cannot be displayed yet.</para> </note> <para> On &Linux;, this information is read from <filename class="devicefile">/proc/dma</filename>, which is only available if the <filename class="directory">/proc</filename> pseudo-filesystem is compiled into the kernel.</para> <para> A list of all currently-registered (<acronym>ISA</acronym> bus) <acronym>DMA</acronym> channels that are in use is shown. The first column shows the <acronym>DMA</acronym> channel, and the second column shows the device which uses that channel.</para> <para> Unused <acronym>DMA</acronym> channels are not listed. </para> <para> The user cannot modify any settings on this page. </para> </sect1> </article>