SHA                                                                   SHA
                                                     N V - B D I Z C
  Operation:  M <- (A) /\ (X) /\ (PCH+1)             ? ? - - - - ? ?

  +----------------+-----------------------+---------+---------+----------+
  | Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles|
  +----------------+-----------------------+---------+---------+----------+
  |  Absolute,X    |   SHA $FFFF,X         |   $93   |    3    |    6*    |
  |  Absolute,Y    |   SHA $FFFF,Y         |   $9F   |    3    |    5*    |
  +----------------+-----------------------+---------+---------+----------+
  * Add 1 if page boundary is crossed.