ARR                ARR Accu AND with memory, 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     |
  +----------------+-----------------------+---------+---------+----------+