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POP (SPC700): Difference between revisions
From SnesLab
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| Line 7: | Line 7: | ||
|'''Speed''' | |'''Speed''' | ||
|+ | |+ | ||
| | |[[Accumulator Addressing | Accumulator]] | ||
|AE | |AE | ||
|1 byte | |1 byte | ||
|4 cycles | |4 cycles | ||
|+ | |+ | ||
| | |[[Stack Addressing | Stack]] | ||
|CE | |CE | ||
|1 byte | |1 byte | ||
|4 cycles | |4 cycles | ||
|+ | |+ | ||
| | |[[Stack Addressing | Stack]] | ||
|EE | |EE | ||
|1 byte | |1 byte | ||
Revision as of 17:51, 23 July 2023
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Accumulator | AE | 1 byte | 4 cycles | ||||
| Stack | CE | 1 byte | 4 cycles | ||||
| Stack | EE | 1 byte | 4 cycles | ||||
| 8E | 1 byte | 4 cycles | |||||
| Flags Affected | ||||||||
|---|---|---|---|---|---|---|---|---|
| Operand is the PSW? | N | V | P | B | H | I | Z | C |
| yes | ||||||||
| no | . | . | . | . | . | . | . | . |
POP is an SPC700 command that pops a byte from the stack, pulling it into a register. The target register can be:
- the accumulator
- the X Index Register
- the Y Index Register
- the program status word
When the program status word is the operand, all the flags are naturally affected as that is the register they live in.
See Also
References
- Appendix C-9 of Book I of the official Super Nintendo development manual