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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