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ROL: Difference between revisions
From SnesLab
(→See Also: ROL) |
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!colspan="9"|Flags | !colspan="9"|Flags Affected | ||
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|N | |N | ||
Revision as of 20:55, 19 November 2023
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| accumulator | 2A | 1 byte | 2 cycles | ||||
| absolute | 2E | 3 bytes | 6 cycles | ||||
| direct page | 26 | 2 bytes | 5 cycles | ||||
| absolute indexed by X | 3E | 3 bytes | 7 cycles | ||||
| direct page indexed by X | 36 | 2 bytes | 6 cycles | ||||
| Flags Affected | ||||||||
|---|---|---|---|---|---|---|---|---|
| N | V | M | X | D | I | Z | C | |
| . | . | . | . | . | ||||
ROL (Rotate Left) is a 65x instruction that rotates a value and the carry flag left one bit. The most significant bit is shifted into the carry flag. The carry flag is shifted into the least significant bit.
See Also
External Links
- Eyes & Lichty page on ROL: https://archive.org/details/0893037893ProgrammingThe65816/page/n516
- Labiak page on ROL: https://archive.org/details/Programming_the_65816/page/n184
- MCS6500 Manual page on ROL: https://archive.org/details/mos_microcomputers_programming_manual/page/n170
- Carr page on ROL: https://archive.org/details/6502UsersManual/page/n282
- Leventhal page on ROL: https://archive.org/details/6502-assembly-language-programming/page/n134
- snes9x implementation of ROL: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L1011
- undisbeliever on ROL: https://undisbeliever.net/snesdev/65816-opcodes.html#rol-rotate-left