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documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

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ON COM(n) - Event trapping statement that specifies a subroutine to
            branch to when characters are received at communications port n
Syntax
  ON COM(n) GOSUB {linelabel | linenumber}
    ■ n, an integer expression, indicates one of the serial ports,
      either 1 or 2
    ■ linelabel or linenumber is the first line of the event-handling
      subroutine
 
See Also  ◄COM(n) ON►