SRE           SRE LSR memory, EOR accu, result into accu              SRE

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

  +----------------+-----------------------+---------+---------+----------+
  | Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles|
  +----------------+-----------------------+---------+---------+----------+
  |  Zero Page     |   SRE $FF             |   $47   |    2    |    5     |
  |  Zero Page,X   |   SRE $FF,X           |   $57   |    2    |    6     |
  |  Absolute      |   SRE $FFFF           |   $4F   |    3    |    6     |
  |  Absolute,X    |   SRE $FFFF,X         |   $5F   |    3    |    7     |
  |  Absolute,Y    |   SRE $FFFF,Y         |   $5B   |    3    |    7     |
  |  (Indirect,X)  |   SRE ($FF,X)         |   $43   |    2    |    8     |
  |  (Indirect),Y  |   SRE ($FF),Y         |   $53   |    2    |    8     |
  +----------------+-----------------------+---------+---------+----------+
  * Add 1 if page boundary is crossed.

  Also known as LSE.