ASR                ASR Accu AND with memory, LSR accu                 ASR

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

  +----------------+-----------------------+---------+---------+----------+
  | Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles|
  +----------------+-----------------------+---------+---------+----------+
  |  Immediate     |   ASR #$FF            |   $4B   |    2    |    2     |
  +----------------+-----------------------+---------+---------+----------+

  Also known as ALR.