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PUSH (SPC700): Difference between revisions
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(→See Also: '816 pushes) |
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| Line 12: | Line 12: | ||
|4 cycles | |4 cycles | ||
|+ | |+ | ||
|[[Stack Addressing | Stack]] | |[[Stack Addressing | Stack]] - X | ||
|4D | |4D | ||
|1 byte | |1 byte | ||
|4 cycles | |4 cycles | ||
|+ | |+ | ||
|[[Stack Addressing | Stack]] | |[[Stack Addressing | Stack]] - Y | ||
|6D | |6D | ||
|1 byte | |1 byte | ||
|4 cycles | |4 cycles | ||
|+ | |+ | ||
|[[Stack Addressing | Stack]] | |[[Stack Addressing | Stack]] | ||
- PSW | |||
|0D | |0D | ||
|1 byte | |1 byte | ||
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* the [[program status word]] | * the [[program status word]] | ||
No flags are affected. | The [[stack pointer]] is decremented by one after the value is transferred. No flags are affected. | ||
==== Syntax ==== | ==== Syntax ==== | ||
Latest revision as of 03:54, 9 August 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Accumulator | 2D | 1 byte | 4 cycles | ||||
| Stack - X | 4D | 1 byte | 4 cycles | ||||
| Stack - Y | 6D | 1 byte | 4 cycles | ||||
| Stack
- PSW |
0D | 1 byte | 4 cycles | ||||
| Flags Affected | |||||||
|---|---|---|---|---|---|---|---|
| N | V | P | B | H | I | Z | C |
| . | . | . | . | . | . | . | . |
PUSH is an SPC700 command that pushes the value of a register to the stack. The register can be:
- the accumulator
- the X index register
- the Y index register
- the program status word
The stack pointer is decremented by one after the value is transferred. No flags are affected.
Syntax
PUSH A PUSH X PUSH Y PUSH PSW
See Also
References
- Table C-17 in Appendix C-9 of Book I of the official Super Nintendo development manual
- anomie: https://github.com/yupferris/TasmShiz/blob/master/spc700.txt#L541