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  The Standard and Extended Character Sets
    The Character Format
    The First 32 ASCII Characters
    The Box-Drawing Characters
    The Graph and Block Characters

  Text File Formatting Conventions
    Ordinary Text File Formats
    Word-Processor Text Formats

  The IBM personal computer family uses 256 distinct characters. These
  characters have numeric byte codes with values ranging from 00H through
  FFH (0 through decimal 255). The characters are of two types:

  .  The first 128 characters, 00H through 7FH (decimal 0 through 127), are
     the standard ASCII character set. Most computers handle the standard
     characters in the same way (with the exception of the first 32
     characters--see page 483).

  .  The last 128 characters, 80H through FFH (decimal 128 through 255), are
     special characters that make up the extended ASCII character set. Each
     computer manufacturer decides how to use these special characters.

  All models of the IBM personal computers use the same extended ASCII
  character set. Computers that closely mimic the IBM personal computers use
  this set as well, but other computers often have their own set of special
  characters. Be aware of this when you convert programs from other
  computers or when you write PC programs that you plan to convert for use
  on other computers.