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  Name:     inp() - input from a port
  Usage:    <integer> = inp(<port>)
  Params:   integer <port> - the port number to read from. You can
            also specify the port value as a hexadecimal string

  Returns:  an integer equal to the value read in from the port

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

                 * passing the port as an integer:
                 mportval = inp(2)
                 * inputs data from port #2

                 *passing the port as a hex string:
                 mportval = inp("03dA")
                 * inputs data from port 03DAh