inportb()               Input from Hardware Port

 #include   <dos.h>

 unsigned char inportb(port);
 int        port;                        Specified port

    inportb() reads a word from 'port'.

       Returns:     The value read from 'port'.

         Notes:     The inportb() function is called if <dos.h> is not
                    included or if <dos.h> is included but inportb() is
                    #undef, else inportb() is treated as a macro.

   Portability:     8086-Family of processors only.

   -------------------------------- Example ---------------------------------

    The following statements read a byte from port 'x'.

           #include <dos.h>     /* for inportb */

           main()
           {
               char val;

               val = inportb(x);
           }