|    8pr   |
  |  <A HREF="ADDR10A.HTM">ZeroPage,X</A>    |   SBC $FF,X           |   $F5   |    2    |    ?     |
  |  <A HREF="ADDR12A.HTM">Absolute,Y</A>    |   SBC $FFFF,Y         |   $F9   |    3    |    ?     |
  |  <A HREF="ADDR12A.HTM">Absolute,X</A>    |   SBC $FFFF,X         |   $FD   |    3    |    ?     |
  +----------------+-----------------------+---------+---------+----------+
  p Add 1 if page boundary is crossed
  r Add 1 if clock speed is at 40 MHz


 65816 Extensions:

  +----------------