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ORA: Difference between revisions

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(clobbered -> affected)
(additional cycles)
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|09
|09
|2 bytes
|2 bytes
|2 cycles
|2 cycles*
|+
|+
|absolute
|absolute
|0D
|0D
|3 bytes
|3 bytes
|4 cycles
|4 cycles*
|+
|+
|absolute long
|absolute long
|0F
|0F
|4 bytes
|4 bytes
|5 cycles
|5 cycles*
|+
|+
|direct page
|direct page
|05
|05
|2 bytes
|2 bytes
|3 cycles
|3 cycles*
|+
|+
|direct page indirect
|direct page indirect
|12
|12
|2 bytes
|2 bytes
|5 cycles
|5 cycles*
|+
|+
|direct page indirect long
|direct page indirect long
|07
|07
|2 bytes
|2 bytes
|6 cycles
|6 cycles*
|+
|+
|absolute indexed by X
|absolute indexed by X
|1D
|1D
|3 bytes
|3 bytes
|4 cycles
|4 cycles*
|+
|+
|absolute long indexed by X
|absolute long indexed by X
|1F
|1F
|4 bytes
|4 bytes
|5 cycles
|5 cycles*
|+
|+
|absolute indexed by Y
|absolute indexed by Y
|19
|19
|3 bytes
|3 bytes
|4 cycles
|4 cycles*
|+
|+
|direct page indexed by X
|direct page indexed by X
|15
|15
|2 bytes
|2 bytes
|4 cycles
|4 cycles*
|+
|+
|direct page indexed indirect by X
|direct page indexed indirect by X
|01
|01
|2 bytes
|2 bytes
|6 cycles
|6 cycles*
|+
|+
|direct page indirect indexed by Y
|direct page indirect indexed by Y
|11
|11
|2 bytes
|2 bytes
|5 cycles
|5 cycles*
|+
|+
|direct page indirect long indexed by Y
|direct page indirect long indexed by Y
|17
|17
|2 bytes
|2 bytes
|6 cycles
|6 cycles*
|+
|+
|stack relative
|stack relative
|03
|03
|2 bytes
|2 bytes
|4 cycles
|4 cycles*
|+
|+
|stack relative indirect indexed by Y
|stack relative indirect indexed by Y
|13
|13
|2 bytes
|2 bytes
|7 cycles
|7 cycles*
|}
|}


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'''ORA''' is a 65x instruction that performs a logical OR.
'''ORA''' is a 65x instruction that performs a logical OR.  In all [[addressing modes]], ORA takes one extra cycle when the accumulator is 16 bits wide.


=== See Also ===
=== See Also ===

Revision as of 00:03, 20 November 2023

Basic Info
Addressing Mode Opcode Length Speed
immediate 09 2 bytes 2 cycles*
absolute 0D 3 bytes 4 cycles*
absolute long 0F 4 bytes 5 cycles*
direct page 05 2 bytes 3 cycles*
direct page indirect 12 2 bytes 5 cycles*
direct page indirect long 07 2 bytes 6 cycles*
absolute indexed by X 1D 3 bytes 4 cycles*
absolute long indexed by X 1F 4 bytes 5 cycles*
absolute indexed by Y 19 3 bytes 4 cycles*
direct page indexed by X 15 2 bytes 4 cycles*
direct page indexed indirect by X 01 2 bytes 6 cycles*
direct page indirect indexed by Y 11 2 bytes 5 cycles*
direct page indirect long indexed by Y 17 2 bytes 6 cycles*
stack relative 03 2 bytes 4 cycles*
stack relative indirect indexed by Y 13 2 bytes 7 cycles*
Flags Affected
N V M X D I Z C
. . . . . .

ORA is a 65x instruction that performs a logical OR. In all addressing modes, ORA takes one extra cycle when the accumulator is 16 bits wide.

See Also

External Links

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