ARR                   ARR AND #immediate, ROR accu                    ARR

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

  +----------------+-----------------------+---------+---------+----------+
  | Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles|
  +----------------+-----------------------+---------+---------+----------+
  |  Immediate     |   ARR #$FF            |   $6B   |    2    |    2     |
  +----------------+-----------------------+---------+---------+----------+

  Note: Part of this command are some ADC mechanisms. Following effects
  appear after AND but before ROR: the V-Flag is set according to
  [(A and #mem)+#mem], Bit 0 does NOT go into carry, but Bit 7 is
  exchanged with the carry.