PHW                 PHW Push word on stack                            PHW

  Operation:  Push word to Stack                        N V - B D I Z C
                                                        . . . . . . . .

 4510 Versions:

  +----------------+-----------------------+---------+---------+----------+
  | Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles|
  +----------------+-----------------------+---------+---------+----------+
  |  Immediate     |   PHW #$FFFF          |   $F4   |    3    |    ?     |
  |  Absolute      |   PHW $FFFF           |   $FC   |    3    |    ?     |
  +----------------+-----------------------+---------+---------+----------+