LAE            LAE Stack-Pointer AND with memory, TSX, TXA            LAE
                                                     N V - B D I Z C
  Operation:  X,S,A <- (S /\ M)                      ? ? - - - - ? ?

  +----------------+-----------------------+---------+---------+----------+
  | Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles|
  +----------------+-----------------------+---------+---------+----------+
  |  Absolute,Y    |   LAE $FFFF,Y         |   $BB   |    3    |    4*    |
  +----------------+-----------------------+---------+---------+----------+
  * Add 1 if page boundary is crossed.