TSX              TSX Transfer stack pointer to index X                TSX

  Operation:  S -> X                                    N V - B D I Z C
                                                        / . . . . . / .

  +----------------+-----------------------+---------+---------+----------+
  | Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles|
  +----------------+-----------------------+---------+---------+----------+
  |  Implied       |   TSX                 |   $BA   |    1    |    2     |
  +----------------+-----------------------+---------+---------+----------+