PHD                 PHD Push Direct Register on Stack                 PHD

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

  +----------------+-----------------------+---------+---------+----------+
  | Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles|
  +----------------+-----------------------+---------+---------+----------+
  | Implied/Stack  |   PHD                 |   $0B   |    1    |     4    |
  +----------------+-----------------------+---------+---------+----------+