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STOP (SPC700): Difference between revisions
From SnesLab
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'''STOP''' is an [[SPC700]] standby instruction. It hangs the [[S-SMP]] until reset. <sup>[2]</sup> Nintendo does not want you to use this instruction.<sup>[3]</sup> | '''STOP''' is an [[SPC700]] standby instruction. It hangs the [[S-SMP]] until reset. <sup>[2]</sup> Nintendo does not want you to use this instruction.<sup>[3]</sup> | ||
[[EI]] and [[DI]] have no effect on the behavior of STOP. | |||
No flags are affected. | No flags are affected. | ||
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STOP | STOP | ||
</pre> | </pre> | ||
Perhaps STOP would have been more useful if the APU supported hardware interrupts. | |||
=== See Also === | === See Also === | ||
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# https://problemkaputt.de/fullsnes.htm#snesapuspc700cpujumpcontrolcommands | # https://problemkaputt.de/fullsnes.htm#snesapuspc700cpujumpcontrolcommands | ||
# Summary of SPC700 Commands, [https://archive.org/details/SNESDevManual/book1/page/n226 Appendix C-1] | # Summary of SPC700 Commands, [https://archive.org/details/SNESDevManual/book1/page/n226 Appendix C-1] | ||
# anomie: https://github.com/yupferris/TasmShiz/blob/8fabc9764c33a7ae2520a76d80ed7220bb939f12/spc700.txt#L585 | |||
[[Category:ASM]] | [[Category:ASM]] | ||
Latest revision as of 06:03, 22 July 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Implied (type 3) | FF | 1 byte | 3 cycles | ||||
| Flags Affected | |||||||
|---|---|---|---|---|---|---|---|
| N | V | P | B | H | I | Z | C |
| . | . | . | . | . | . | . | . |
STOP is an SPC700 standby instruction. It hangs the S-SMP until reset. [2] Nintendo does not want you to use this instruction.[3]
EI and DI have no effect on the behavior of STOP.
No flags are affected.
Syntax
STOP
Perhaps STOP would have been more useful if the APU supported hardware interrupts.
See Also
References
- Official Super Nintendo development manual on STOP: Table C-20 in Appendix C-10 of Book I
- https://problemkaputt.de/fullsnes.htm#snesapuspc700cpujumpcontrolcommands
- Summary of SPC700 Commands, Appendix C-1
- anomie: https://github.com/yupferris/TasmShiz/blob/8fabc9764c33a7ae2520a76d80ed7220bb939f12/spc700.txt#L585