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STP: Difference between revisions
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''' | {| class="wikitable" style="float:right;clear:right;width:40%" | ||
!colspan="8"|Basic Info | |||
|+ | |||
|'''Addressing Mode''' | |||
|'''Opcode''' | |||
|'''Length''' | |||
|'''Speed''' | |||
|+ | |||
|[[Implied]] (type 3) | |||
|DB | |||
|1 byte | |||
|3 cycles | |||
|} | |||
[[Category: ASM]] | {| class="wikitable" style="float:right;clear:right;width:30%" | ||
!colspan="8"|Flags Affected | |||
|+ | |||
|[[Negative Flag|N]] | |||
|[[Overflow Flag|V]] | |||
|[[M Flag|M]] | |||
|[[X Flag|X]] | |||
|[[Decimal Flag|D]] | |||
|[[I Flag|I]] | |||
|[[Zero Flag|Z]] | |||
|[[Carry Flag|C]] | |||
|+ | |||
|. | |||
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'''STP''' (SToP-the-clock)<sup>[1]</sup> is an instruction that halts the [[65c816]], putting it into a low power state until it is reset. The [[PHI2]] clock is held high. | |||
[[Category:ASM]] | |||
[[Category:65c02 additions]] | |||
[[Category:One-byte Instructions]] | |||
[[Category:Control Instructions]] | |||
[[Category:Implied Instructions]] | |||
[[Category:Three-cycle Instructions]] | |||
=== See Also === | |||
* [[WAI]] | |||
* [[STOP]] | |||
=== External Links === | |||
* [[Eyes & Lichty]] page 504, on STP: https://archive.org/details/0893037893ProgrammingThe65816/page/n530 | |||
* [[Labiak]] page 185 on STP: https://archive.org/details/Programming_the_65816/page/n195 | |||
* snes9x implementation of STP: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L3328 | |||
* undisbeliever on STP: https://undisbeliever.net/snesdev/65816-opcodes.html#stp-stop-the-processor | |||
=== References === | |||
# Although "Stop The Processor" fits, all the letters in this mnemonic are from the word "stop." See row 58 of Table 5-1, "Instruction Set Table" on Page 21 of the official 65c02 datasheet: https://www.westerndesigncenter.com/wdc/documentation/w65c02s.pdf |
Latest revision as of 12:14, 14 December 2023
Basic Info | |||||||
---|---|---|---|---|---|---|---|
Addressing Mode | Opcode | Length | Speed | ||||
Implied (type 3) | DB | 1 byte | 3 cycles |
Flags Affected | |||||||
---|---|---|---|---|---|---|---|
N | V | M | X | D | I | Z | C |
. | . | . | . | . | . | . | . |
STP (SToP-the-clock)[1] is an instruction that halts the 65c816, putting it into a low power state until it is reset. The PHI2 clock is held high.
See Also
External Links
- Eyes & Lichty page 504, on STP: https://archive.org/details/0893037893ProgrammingThe65816/page/n530
- Labiak page 185 on STP: https://archive.org/details/Programming_the_65816/page/n195
- snes9x implementation of STP: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L3328
- undisbeliever on STP: https://undisbeliever.net/snesdev/65816-opcodes.html#stp-stop-the-processor
References
- Although "Stop The Processor" fits, all the letters in this mnemonic are from the word "stop." See row 58 of Table 5-1, "Instruction Set Table" on Page 21 of the official 65c02 datasheet: https://www.westerndesigncenter.com/wdc/documentation/w65c02s.pdf