PHY                     PHY Push index Y on Stack                     PHY

 65816 only!
                                                        N V M X D I Z C
  Operation:  Y ->Ws, S-2 ->S                           . . . . . . . .

  +----------------+-----------------------+---------+---------+----------+
  | Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles|
  +----------------+-----------------------+---------+---------+----------+
  | Implied/Stack  |   PHY                 |   $5A   |    1    |    3/4   |
  +----------------+-----------------------+---------+---------+----------+
  For penalty cycles on the 65816, check the desired addressing mode.