Important Notice

The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

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Set Direction Flag                               Flags:  O D I T S Z A P C
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Syntax:  STD                                               1
 
  Sets the direction flag. All subsequent string instructions will process
  down (from high addresses to low addresses).
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