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TXY: Difference between revisions
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{| class="wikitable" style="float:right;clear:right;width: | {| class="wikitable" style="float:right;clear:right;width:40%" | ||
!colspan="8"|Basic Info | !colspan="8"|Basic Info | ||
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|'''Speed''' | |'''Speed''' | ||
|+ | |+ | ||
| | |[[Implied]] (type 1) | ||
|9B | |9B | ||
|1 byte | |1 byte | ||
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{| class="wikitable" style="float:right;clear:right;width:30%" | {| class="wikitable" style="float:right;clear:right;width:30%" | ||
!colspan="8"|Flags | !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]] | |||
|+ | |+ | ||
|N | |N | ||
|. | |. | ||
|. | |. | ||
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|. | |. | ||
|. | |. | ||
| | |Z | ||
|. | |. | ||
|} | |} | ||
'''TXY''' is a [[65c816]] instruction that transfers the value of the [[X index register]] to the [[Y index register]]. | '''TXY''' is a [[65c816]] instruction that transfers the value of the [[X index register]] to the [[Y index register]]. TXY always transfers one or two bytes depending on how wide the index registers are. They are both always the same size. | ||
==== Syntax ==== | |||
<pre> | |||
TXY | |||
</pre> | |||
TXY works even in [[emulation mode]] where one byte is always transfered. | |||
=== See Also === | === See Also === | ||
* [[TYX]] | * [[TYX]] | ||
* [[TXA]] | |||
* [[STX]] | |||
* [[TXS]] | |||
=== External Links === | === External Links === | ||
* [[Eyes & Lichty]] | * [[Eyes & Lichty]], [https://archive.org/details/0893037893ProgrammingThe65816/page/519 page 519] on TXY | ||
* [[Labiak]] | * [[Labiak]], [https://archive.org/details/Programming_the_65816/page/n210 page 200] on TXY | ||
* snes9x implementation of TXY: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L2424 | * snes9x implementation of TXY: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L2424 | ||
[[Category:ASM]] | [[Category:ASM]] | ||
[[Category:65c816 additions]] | [[Category:65c816 additions]] | ||
[[Category:Transfer Instructions]] | |||
[[Category:One-byte Instructions]] | |||
[[Category:Implied Instructions]] | |||
[[Category:Two-cycle Instructions]] | |||
Latest revision as of 15:32, 10 August 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Implied (type 1) | 9B | 1 byte | 2 cycles | ||||
| Flags Affected | |||||||
|---|---|---|---|---|---|---|---|
| N | V | M | X | D | I | Z | C |
| N | . | . | . | . | . | Z | . |
TXY is a 65c816 instruction that transfers the value of the X index register to the Y index register. TXY always transfers one or two bytes depending on how wide the index registers are. They are both always the same size.
Syntax
TXY
TXY works even in emulation mode where one byte is always transfered.
See Also
External Links
- Eyes & Lichty, page 519 on TXY
- Labiak, page 200 on TXY
- snes9x implementation of TXY: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L2424