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ROL (SPC700): Difference between revisions
From SnesLab
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=== External Links === | === External Links === | ||
* Official Super Nintendo development manual on ROL: [https://archive.org/details/SNESDevManual/book1/page/n232 Appendix C-7 of Book I] | * Official Super Nintendo development manual on ROL: [https://archive.org/details/SNESDevManual/book1/page/n232 Appendix C-7 of Book I] | ||
* anomie: https://github.com/yupferris/TasmShiz/blob/master/spc700.txt#L549 | |||
[[Category:ASM]] | [[Category:ASM]] | ||
[[Category:SPC700]] | [[Category:SPC700]] | ||
[[Category:Shift Rotation Commands]] | [[Category:Shift Rotation Commands]] | ||
Revision as of 21:46, 13 July 2024
| 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 Affected | |||||||
|---|---|---|---|---|---|---|---|
| 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.
Syntax
ROL A ROL dp ROL dp+X ROL !abs
See Also
External Links
- Official Super Nintendo development manual on ROL: Appendix C-7 of Book I
- anomie: https://github.com/yupferris/TasmShiz/blob/master/spc700.txt#L549