blob: 50832841ba1857e4c53f707a8123b507ad5dec09 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
|
<?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 % British-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>
<othercredit role="translator"
><firstname
>Malcolm</firstname
><surname
>Hunter</surname
><affiliation
><address
><email
>[email protected]</email
></address
></affiliation
><contrib
>Conversion to British English</contrib
></othercredit
>
</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>
|
