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ORA: Difference between revisions
From SnesLab
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* [[Labiak]] page on ORA: https://archive.org/details/Programming_the_65816/page/n166 | * [[Labiak]] page on ORA: https://archive.org/details/Programming_the_65816/page/n166 | ||
* [[MCS6500 Manual]] page on ORA: https://archive.org/details/mos_microcomputers_programming_manual/page/n36 | * [[MCS6500 Manual]] page on ORA: https://archive.org/details/mos_microcomputers_programming_manual/page/n36 | ||
* [[Carr]] page on ORA: https://archive.org/details/6502UsersManual/page/n279 | |||
[[Category:ASM]] | [[Category:ASM]] | ||
[[Category:Group One Instructions]] | [[Category:Group One Instructions]] | ||
[[Category:Inherited from 6502]] | [[Category:Inherited from 6502]] |
Revision as of 04:32, 16 May 2023
ORA is a 65x instruction that performs a logical OR.
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 Clobbered | |||||||
---|---|---|---|---|---|---|---|
N | V | M | X | D | I | Z | C |
. | . | . | . | . | . |
See Also
External Links
- Eyes & Lichty page on ORA: https://archive.org/details/0893037893ProgrammingThe65816/page/n497
- Labiak page on ORA: https://archive.org/details/Programming_the_65816/page/n166
- MCS6500 Manual page on ORA: https://archive.org/details/mos_microcomputers_programming_manual/page/n36
- Carr page on ORA: https://archive.org/details/6502UsersManual/page/n279