Dot.html 3.7 KB

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  14. <title>Using as: Dot</title>
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  22. <link href="AS-Index.html#AS-Index" rel="index" title="AS Index">
  23. <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
  24. <link href="Symbols.html#Symbols" rel="up" title="Symbols">
  25. <link href="Symbol-Attributes.html#Symbol-Attributes" rel="next" title="Symbol Attributes">
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  57. <a name="Dot"></a>
  58. <div class="header">
  59. <p>
  60. Next: <a href="Symbol-Attributes.html#Symbol-Attributes" accesskey="n" rel="next">Symbol Attributes</a>, Previous: <a href="Symbol-Names.html#Symbol-Names" accesskey="p" rel="prev">Symbol Names</a>, Up: <a href="Symbols.html#Symbols" accesskey="u" rel="up">Symbols</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="AS-Index.html#AS-Index" title="Index" rel="index">Index</a>]</p>
  61. </div>
  62. <hr>
  63. <a name="The-Special-Dot-Symbol"></a>
  64. <h3 class="section">5.4 The Special Dot Symbol</h3>
  65. <a name="index-dot-_0028symbol_0029"></a>
  66. <a name="index-_002e-_0028symbol_0029"></a>
  67. <a name="index-current-address"></a>
  68. <a name="index-location-counter"></a>
  69. <p>The special symbol &lsquo;<samp>.</samp>&rsquo; refers to the current address that
  70. <code>as</code> is assembling into. Thus, the expression &lsquo;<samp>melvin:
  71. .long .</samp>&rsquo; defines <code>melvin</code> to contain its own address.
  72. Assigning a value to <code>.</code> is treated the same as a <code>.org</code>
  73. directive.
  74. Thus, the expression &lsquo;<samp>.=.+4</samp>&rsquo; is the same as saying
  75. &lsquo;<samp>.space 4</samp>&rsquo;.
  76. </p>
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