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  35
  36 <h2 class="appendix">Appendix E Custom Character Maps</h2>
  37
  38 <!-- Using custom character maps is a convenient way of mapping ASCII characters to a different encoding. -->
  39 <p>A custom character map is a plaintext file containing statements of the form
  40 <pre class="example">     <var>key</var> = <var>value</var>
  41 </pre>
  42    <p>where <var>key</var> is a character or escape sequence and <var>value</var> is the integer literal instances of this character should be mapped to when occuring as argument to the <code>.char</code> assembler directive.
  43
  44    <p>There is a also a shorthand form for mapping a range of characters at once:
  45 <pre class="example">     <var>low_key</var>-<var>high_key</var> = <var>value</var>
  46 </pre>
  47    <p>This is most useful when mapping the decimal digits and the alphabet. Instead of typing monotonic statements like
  48 <pre class="example">     0=0x10
  49      1=0x11
  50      ...
  51      9=0x19
  52 </pre>
  53    <p>you can achieve the same result from the statement
  54 <pre class="example">     0-9=0x10
  55 </pre>
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