RRA                   RRA ROR memory, ADC memory                      RRA

                                                        N V - B D I Z C
  Operation:  A <- (M >> 1) + (A) + C                   / / . . . . / /

  +----------------+-----------------------+---------+---------+----------+
  | Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles|
  +----------------+-----------------------+---------+---------+----------+
  |  ZeroPage      |   RRA $FF             |   $67   |    2    |    5     |
  |  ZeroPage,X    |   RRA $FF,X           |   $77   |    2    |    6     |
  |  Absolute      |   RRA $FFFF           |   $6F   |    3    |    6     |
  |  Absolute,X    |   RRA $FFFF,X         |   $7F   |    3    |    7     |
  |  Absolute,Y    |   RRA $FFFF,Y         |   $7B   |    3    |    7     |
  |  (Indirect,X)  |   RRA ($FF,X)         |   $63   |    2    |    8     |
  |  (Indirect),Y  |   RRA ($FF),Y         |   $73   |    2    |    8     |
  +----------------+-----------------------+---------+---------+----------+