📄 inst_s49.htm

📁 ST20 Embedded Toolset R2.0.5用于开发基于ST20芯片机顶盒软件的开发平台,2.0.5版本,国内找不到的.在国外论坛上花了N天才找到!

💻 HTM

字号:

<html>

<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<meta name="GENERATOR" content="Quadralay WebWorks Publisher Professional Edition 6.0.5">
<meta name="TEMPLATEBASE" content="book_html">
<meta name="LASTUPDATED" content="08/22/03 10:13:51">
<title>devmove</title>

<STYLE TYPE="text/css">
<!--
	span.Signal { text-transform: uppercase; font-family: Verdana }
-->
</STYLE>

</head>

<body link="#3366CC" vlink="#9999CC" text="#000000" alink="#0000CC" bgcolor="#FFFFFF"
background="images/backgrnd.gif">

<p><img src="images/stlogo.gif" width="106" height="83" align="left"
alt="logo here!"> </p>

<table width="331" border="0" align="right" cellpadding="0" cellspacing="0">
  <tr>
    <td><a href="c2isetto.htm"><img src="images/navtoc.gif" width="84" height="23"
    border="0" alt="TOC"> </a></td>
    <td><a href="inst_s48.htm"><img src="images/navprev.gif" width="80" height="23"
    border="0" alt="PREV"> </a></td>
    <td><a href="inst_s50.htm"><img src="images/navnext.gif" width="83" height="23"
    border="0" alt="NEXT"> </a></td>
    <td><a href="c2isetix.htm"><img src="images/navidx.gif" width="84" height="23"
    border="0" alt="INDEX"> </a></td>
  </tr>
</table>

<p><br clear="all">
</p>

<hr align="left">

<blockquote>
<h2>
  <a name="1219850"> </a><font color="#003366"  face="Verdana, Arial, Helvetica, sans-serif">devmove</font>
</h2><hr>


<p>
  <a name="1219851"> </a><font size=2  face="Verdana, Arial, Helvetica, sans-serif">device move</font>
</p>


<h3>
  <a name="1219852"> </a><font color="#003366"  face="Verdana, Arial, Helvetica, sans-serif">Code</font>
</h3>


<p>
  <a name="1219853"> </a><font size=2  face="Verdana, Arial, Helvetica, sans-serif">62 F4</font>
</p>


<h3>
  <a name="1219854"> </a><font color="#003366"  face="Verdana, Arial, Helvetica, sans-serif">Description</font>
</h3>


<p>
  <a name="1219855"> </a><font size=2  face="Verdana, Arial, Helvetica, sans-serif">Perform a device copy between memory or memory-mapped devices. Copies <span class=Signal>Areg</span> bytes to address <span class=Signal>Breg</span> from address <span class=Signal>Creg</span>. Only the minimum number of reads and writes required to copy the data are performed. Each read is to a strictly higher (more positive) address than the one before and each write is to a strictly higher byte address than the one before. There is no guarantee of the relative ordering of read and write cycles, except that a write cannot occur until the corresponding read has been performed. The memory accesses performed by this instruction are guaranteed to be correctly sequenced with respect to other device-access instructions. Also, the instruction is guaranteed to be executed after all normal memory access instructions that appear before it in the code sequence, and before all normal memory accesses that appear after it.</font>
</p>


<h3>
  <a name="1219856"> </a><font color="#003366"  face="Verdana, Arial, Helvetica, sans-serif">Definition</font>
</h3>


<p>
  <a name="1219857"> </a><font size=2  face="Verdana, Arial, Helvetica, sans-serif">if (<em>source and destination overlap</em>)<br>

⌨️ 快捷键说明

复制代码 Ctrl + C

搜索代码 Ctrl + F

全屏模式 F11

切换主题 Ctrl + Shift + D

显示快捷键 ?

增大字号 Ctrl + =

减小字号 Ctrl + -