RTL                  RTL Return from Subroutine Long                  RTL

 65816 only!
                                                        N V M X D I Z C
  Operation:  S+2 -> S, Ws+1 -> PC, S+1 -> S, Bs -> PB  . . . . . . . .

  +----------------+-----------------------+---------+---------+----------+
  | Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles|
  +----------------+-----------------------+---------+---------+----------+
  | Implied/Stack  |   RTL                 |   $6B   |    1    |     6    |
  +----------------+-----------------------+---------+---------+----------+