INX                    INX Increment Index X by one                   INX
                                                        N Z C I D V
  Operation:  X + 1 -> X                                / / . . . .
                                 (Ref: 7.4)
  +----------------+-----------------------+---------+---------+----------+
  | Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles|
  +----------------+-----------------------+---------+---------+----------+
  |  Implied       |   INX                 |   $E8   |    1    |    2     |
  +----------------+-----------------------+---------+---------+----------+