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ORA: Difference between revisions
From SnesLab
(added 6502 category) |
(added E&L page) |
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* [[AND]] | * [[AND]] | ||
* [[EOR]] | * [[EOR]] | ||
=== External Links === | |||
* [[Eyes & Lichty]] page on ORA: https://archive.org/details/0893037893ProgrammingThe65816/page/n497 | |||
[[Category:ASM]] | [[Category:ASM]] | ||
[[Category:Group One Instructions]] | [[Category:Group One Instructions]] | ||
[[Category:Inherited from 6502]] | [[Category:Inherited from 6502]] | ||
Revision as of 22:43, 15 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 |
| . | . | . | . | . | . | ||