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  Constant:  _COM_CHR7      _COM_CHR8        _COM_STOP1      _COM_STOP2
             _COM_NOPARITY  _COM_EVENPARITY  _COM_ODDPARITY  _COM_600
             _COM_110       _COM_150         _COM_300        _COM_9600
             _COM_1200      _COM_2400        _COM_4800
 
  Include:   <bios.h>
 
  Context:   _bios_serialcom
 
  Synopsis:  The data argument for the _COM_INIT service is created by
             combining one or more constants with the OR operator.
 
     The constants and their meanings are listed below:
 
     Constant            Meaning
 
     _COM_CHR7           7 data bits
     _COM_CHR8           8 data bits
 
     _COM_STOP1          1 stop bit
     _COM_STOP2          2 stop bits
 
     _COM_NOPARITY       No parity
     _COM_EVENPARITY     Even parity
     _COM_ODDPARITY      Odd parity
 
     _COM_110             110 baud
     _COM_150             150 baud
     _COM_300             300 baud
     _COM_600             600 baud
     _COM_1200           1200 baud
     _COM_2400           2400 baud
     _COM_4800           4800 baud
     _COM_9600           9600 baud
 
     The default values of <data> are 1 stop bit, no parity, and 110
     baud.