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PLY: Difference between revisions
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!colspan="8"|Basic Info | !colspan="8"|Basic Info | ||
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|'''Speed''' | |'''Speed''' | ||
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| | |[[Stack Addressing|Stack]] (Pull) | ||
|7A | |7A | ||
|1 byte | |1 byte | ||
|4 cycles | |4 cycles* | ||
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{| class="wikitable" style="float:right;clear:right;width:30%" | {| class="wikitable" style="float:right;clear:right;width:30%" | ||
!colspan="9"|Flags | !colspan="9"|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]] | |||
|+ | |+ | ||
|N | |N | ||
|. | |. | ||
|. | |. | ||
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|. | |. | ||
| | |Z | ||
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|} | |} | ||
'''PLY''' (PulL Y) is a 65x instruction that pulls the value at the top of the [[stack]] into the [[Y index register]]. PLY increments the [[stack pointer]] before the pull. | |||
==== Syntax ==== | |||
<pre> | |||
PLY | |||
</pre> | |||
==== Cycle Penalty ==== | |||
* PLY takes one additional cycle if the index registers are 16 bits wide. | |||
=== See Also === | |||
* [[PHY]] | |||
* [[PLX]] | |||
* [[PLA]] | |||
* [[LDY]] | |||
=== External Links === | === External Links === | ||
* [[Eyes & Lichty]] page on PLY | * [[Eyes & Lichty]], [https://archive.org/details/0893037893ProgrammingThe65816/page/488 page 488] on PLY | ||
* [[Labiak]], [https://archive.org/details/Programming_the_65816/page/n182 page 172] on PLY | |||
* snes9x implementation of PLY: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L1921 | |||
[[Category:ASM]] | [[Category:ASM]] | ||
[[Category:65c02 additions]] | [[Category:65c02 additions]] | ||
[[Category:Pull Instructions]] | |||
[[Category:One-byte Instructions]] | |||
[[Category:Four-cycle Instructions]] | |||
Latest revision as of 06:31, 22 August 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Stack (Pull) | 7A | 1 byte | 4 cycles* | ||||
| Flags Affected | ||||||||
|---|---|---|---|---|---|---|---|---|
| N | V | M | X | D | I | Z | C | |
| N | . | . | . | . | . | Z | . | |
PLY (PulL Y) is a 65x instruction that pulls the value at the top of the stack into the Y index register. PLY increments the stack pointer before the pull.
Syntax
PLY
Cycle Penalty
- PLY takes one additional cycle if the index registers are 16 bits wide.
See Also
External Links
- Eyes & Lichty, page 488 on PLY
- Labiak, page 172 on PLY
- snes9x implementation of PLY: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L1921