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ROL (SPC700): Difference between revisions
From SnesLab
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!colspan="8"|Flags Clobbered | !colspan="8"|Flags Clobbered | ||
|+ | |+ | ||
|N | |[[Negative Flag|N]] | ||
|V | |[[Overflow Flag|V]] | ||
|P | |[[Direct Page Flag|P]] | ||
|B | |[[Break Flag|B]] | ||
|H | |[[Half-Carry Flag|H]] | ||
|I | |[[Interrupt Enable Flag|I]] | ||
|Z | |[[Zero Flag|Z]] | ||
|C | |[[Carry Flag|C]] | ||
|+ | |+ | ||
| | | | ||
Revision as of 05:00, 27 November 2023
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Accumulator | 3C | 1 byte | 2 cycles | ||||
| Direct Page | 2B | 2 bytes | 4 cycles | ||||
| Direct Page Indexed by X | 3B | 2 bytes | 5 cycles | ||||
| Absolute | 2C | 3 bytes | 5 cycles | ||||
| Flags Clobbered | |||||||
|---|---|---|---|---|---|---|---|
| N | V | P | B | H | I | Z | C |
| . | . | . | . | . | |||
ROL is an SPC700 instruction that rotates its operand one bit to the left. The most significant bit is rotated into the carry flag. The old value of the carry flag is rotated into the least significant bit.
See Also
External Links
- Official Super Nintendo development manual on ROL: Appendix C-7 of Book I