📄 except8.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="09/01/03 09:53:28">
<title>6.7 Traps</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="st20c1to.htm"><img src="images/navtoc.gif" width="84" height="23"
    border="0" alt="TOC"> </a></td>
    <td><a href="except7.htm"><img src="images/navprev.gif" width="80" height="23"
    border="0" alt="PREV"> </a></td>
    <td><a href="except9.htm"><img src="images/navnext.gif" width="83" height="23"
    border="0" alt="NEXT"> </a></td>
    <td><a href="st20c1ix.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="1102417"> </a><font color="#003366"  face="Verdana, Arial, Helvetica, sans-serif">6.7 	 Traps</font>
</h2><hr>


<p>
  <a name="1102418"> </a><font size=2  face="Verdana, Arial, Helvetica, sans-serif">The ST20-C1 has a system of traps which act as software generated interrupts. Any level of exception can be called as a user exception using <strong>ecall</strong>. This mechanism can be used for system calls to an operating system. In addition, some special exception levels are reserved for system use to provide for the trapping of breakpoints, scheduling events, illegal operations and the machine becoming idle. The reserved `system' exception levels are described in <a href="except2.htm#1102122"><font  color="#0000ff" face="Verdana, Arial, Helvetica, sans-serif"><i>Section

⌨️ 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 + -