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NOP
From SnesLab
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Implied (type 3) | EA | 1 byte | 2 cycles | ||||
| Flags Affected | |||||||
|---|---|---|---|---|---|---|---|
| N | V | M | X | D | I | Z | C |
| . | . | . | . | . | . | . | . |
NOP (No OPeration) is an instruction that does nothing (other than increment the program counter by one).
No flags are affected.
Syntax
NOP
Early 65c816 chips commonly needed NOP after a REP or SEP.
See Also
External Links
- Eyes & Lichty, page 470 on NOP
- lbid, page 263.
- Labiak, page 155 on NOP
- Carr, page 265 on NOP
- Leventhal, page 3-78 on NOP
- snes9x implementation of NOP: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L1606
- undisbeliever on NOP: https://undisbeliever.net/snesdev/65816-opcodes.html#nop-no-operation
- Pickens, John. http://www.6502.org/tutorials/6502opcodes.html#NOP