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

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