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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documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

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Convert Word to Double                           Flags:  O D I T S Z A P C
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Syntax:  CWD
 
  Converts the signed word in AX to a signed word in the DX:AX
  register pair by extending the sign bit of AX into all bits of DX.
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