PHK              PHK Push Program Bank Register on Stack              PHK

 65816 only!
                                                        N V M X D I Z C
  Operation:  PB->Bs, S-1 ->S                           . . . . . . . .

  +----------------+-----------------------+---------+---------+----------+
  | Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles|
  +----------------+-----------------------+---------+---------+----------+
  | Implied/Stack  |   PHK                 |   $4B   |    1    |     3    |
  +----------------+-----------------------+---------+---------+----------+