TRB                      TRB Test and Reset Bit                       TRB

 65816 only!
                                                        N V M X D I Z C
  Operation:  /A /\ W -> W                              . . . . . . / .

  +----------------+-----------------------+---------+---------+----------+
  | Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles|
  +----------------+-----------------------+---------+---------+----------+
  | Absolute       |   TRB $FFFF           |   $1C   |    3    |    4     |
  | Direct Page    |   TRB $FF             |   $14   |    2    |    3     |
  +----------------+-----------------------+---------+---------+----------+
  For penalty cycles on the 65816, check the desired addressing mode.