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OUT              Output to Port                      Flags: not altered

OUT port,accumulator

          Logic:    (port) . accumulator

    OUT transfers a byte or a word from AL or AX to the specified port.
    The port may be specified with an immediate byte constant (allowing
    access to ports 0 through 255) or with a word value in DX (allowing
    access to ports 0 through 65,535).

  --------------------------------------------------------------------------
   Operands                  Clocks   Transfers  Bytes   Example
                           byte(word)
   immed8, accumulator       10(14)       1        2     OUT 254,AX
   DX, accumulator           8(12)        1        1     OUT DX,AL
  --------------------------------------------------------------------------

       Note:          It is advised that hardware not use I/O ports F8h
                      through FFh, since these are reserved for
                      controlling the math coprocessor and future
                      processor extensions.