PHA                   PHA Push accumulator on stack                   PHA

  Operation:  A to Stack                                N Z C I D V
                                                        . . . . . .
                                 (Ref: 8.5)
  +----------------+-----------------------+---------+---------+----------+
  | Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles|
  +----------------+-----------------------+---------+---------+----------+
  |  Implied       |   PHA                 |   $48   |    1    |    3     |
  +----------------+-----------------------+---------+---------+----------+