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ROR: Difference between revisions
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* [[Carr]] page on ROR: https://archive.org/details/6502UsersManual/page/n282 | * [[Carr]] page on ROR: https://archive.org/details/6502UsersManual/page/n282 | ||
* [[Leventhal]] page on ROR: https://archive.org/details/6502-assembly-language-programming/page/n136 | * [[Leventhal]] page on ROR: https://archive.org/details/6502-assembly-language-programming/page/n136 | ||
* snes9x implementation of ROR: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L1070 | |||
[[Category:ASM]] | [[Category:ASM]] | ||
Revision as of 20:46, 17 May 2023
ROR (Rotate Right) is a 65x instruction that rotates a value and the carry flag right one bit. The least significant bit is shifted into the carry flag. The carry flag is shifted into the most significant bit.
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| accumulator | 6A | 1 byte | 2 cycles | ||||
| absolute | 6E | 3 bytes | 6 cycles | ||||
| direct page | 66 | 2 bytes | 5 cycles | ||||
| absolute indexed by X | 7E | 3 bytes | 7 cycles | ||||
| direct page indexed by X | 76 | 2 bytes | 6 cycles | ||||
| Flags Clobbered | ||||||||
|---|---|---|---|---|---|---|---|---|
| N | V | M | X | D | I | Z | C | |
| . | . | . | . | . | ||||
See Also
External Links
- Eyes & Lichty page on ROR: https://archive.org/details/0893037893ProgrammingThe65816/page/n517
- Labiak page on ROR: https://archive.org/details/Programming_the_65816/page/n185
- MCS6500 Manual page on ROR: https://archive.org/details/mos_microcomputers_programming_manual/page/n171
- Carr page on ROR: https://archive.org/details/6502UsersManual/page/n282
- Leventhal page on ROR: https://archive.org/details/6502-assembly-language-programming/page/n136
- snes9x implementation of ROR: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L1070