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documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

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▀ This function can be used to check the status of character devices, such
  as the serial port, that do not have their own "traditional" MS-DOS
  status calls.
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