ORA                 ORA "OR" memory with accumulator                  ORA

  Operation: A V M -> A                                 N V - B D I Z C
                                                        / . . . . . / .

  +----------------+-----------------------+---------+---------+----------+
  | Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles|
  +----------------+-----------------------+---------+---------+----------+
  |  Immediate     |   ORA #$FF            |   $09   |    2    |    2     |
  |  ZeroPage      |   ORA $FF             |   $05   |    2    |    3     |
  |  ZeroPage,X    |   ORA $FF,X           |   $15   |    2    |    4     |
  |  Absolute      |   ORA $FFFF           |   $0D   |    3    |    4     |
  |  Absolute,X    |   ORA $FFFF,X         |   $1D   |    3    |    4*    |
  |  Absolute,Y    |   ORA $FFFF,Y         |   $19   |    3    |    4*    |
  |  (Indirect,X)  |   ORA ($FF,X)         |   $01   |    2    |    6     |
  |  (Indirect),Y  |   ORA ($FF),Y         |   $11   |    2    |    5*    |
  +----------------+-----------------------+---------+---------+----------+
  * Add 1 on page crossing
  For penalty cycles on the 65816, check the desired addressing mode.

 65816 Extensions:

  +----------------+-----------------------+---------+---------+----------+
  | Addressing Mode| Assembly Language Form| OP CODE |No. Bytes|No. Cycles|
  +----------------+-----------------------+---------+---------+----------+
  | AbsoluteLong   |   ORA $FFFFFF         |   $0F   |    4    |     5    |
  | AbsoluteLong,X |   ORA $FFFFFF,X       |   $1F   |    4    |     5    |
  | (Indirect)     |   ORA ($FF)           |   $12   |    2    |     5    |
  | [Indirect Long]|   ORA [$FF]           |   $07   |    2    |     6    |
  | [Ind.Long],Y   |   ORA [$FF],Y         |   $17   |    2    |     6    |
  | Relative,S     |   ORA $FF,S           |   $03   |    2    |     4    |
  | (Indirect,S),Y |   ORA ($FF,S),Y       |   $13   |    2    |     7    |
  +----------------+-----------------------+---------+---------+----------+