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inportb()                Input from Hardware Port

 #include   <dos.h>

 int        inport(port);
 int        port;                        Specified port

    inportb() is a macro that reads a word from the input port specified
    by 'port'.

    Returns:    The value read from 'port'.

      Notes:    If <dos.h> is not included or if you include <dos.h> and
                #undef inportb(), the function inportb() will be called.