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-<table class="head">
- <tr>
- <td class="head-ltitle">MEM(4)</td>
- <td class="head-vol">Device Drivers Manual (mvme68k)</td>
- <td class="head-rtitle">MEM(4)</td>
- </tr>
-</table>
-<div class="manual-text">
-<section class="Sh">
-<h1 class="Sh" id="NAME"><a class="permalink" href="#NAME">NAME</a></h1>
-<p class="Pp"><code class="Nm">mem</code>, <code class="Nm">kmem</code> &#x2014;
- <span class="Nd">main memory</span></p>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1>
-<p class="Pp">The file <code class="Nm">/dev/mem</code> is an interface to the
- physical memory of the computer. Byte offsets in this file are interpreted
- as physical memory addresses. Reading and writing this file is equivalent to
- reading and writing memory itself. An error will be returned if an attempt
- is made to reference an offset outside of
- <code class="Nm">/dev/mem</code>.</p>
-<p class="Pp">Kernel virtual memory is accessed via the file
- <code class="Nm">/dev/kmem</code> in the same manner as
- <code class="Nm">/dev/mem</code>. Only kernel virtual addresses that are
- currently mapped to memory are allowed.</p>
-<p class="Pp">On the Motorola MVME series of single board computers, physical
- memory may be discontiguous; kernel virtual memory begins at
- <span class="Ad">0x00008000</span>.</p>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="FILES"><a class="permalink" href="#FILES">FILES</a></h1>
-<dl class="Bl-tag Bl-compact">
- <dt><span class="Pa">/dev/mem</span></dt>
- <dd style="width: auto;">&#x00A0;</dd>
- <dt><span class="Pa">/dev/kmem</span></dt>
- <dd style="width: auto;">&#x00A0;</dd>
-</dl>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="HISTORY"><a class="permalink" href="#HISTORY">HISTORY</a></h1>
-<p class="Pp">The files <code class="Nm">mem</code> and
- <code class="Nm">kmem</code> appeared in <span class="Ux">Version&#x00A0;6
- AT&amp;T UNIX</span>.</p>
-</section>
-</div>
-<table class="foot">
- <tr>
- <td class="foot-date">November 28, 1999</td>
- <td class="foot-os">NetBSD 10.1</td>
- </tr>
-</table>