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TYX: Difference between revisions
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'''TYX''' is a [[65c816]] instruction that transfers the value of the [[Y index register]] to the [[X index register]]. | '''TYX''' is a [[65c816]] instruction that transfers the value of the [[Y index register]] to the [[X index register]]. The x flag determines whether 8 or 16 bits are transferred. | ||
The [[negative flag]] will then match the most significant bit of the transferred value. | |||
The [[zero flag]] will indicate whether the transferred value is zero (set if zero). | |||
==== Syntax ==== | |||
<pre> | |||
TYX | |||
</pre> | |||
TYX works even in [[emulation mode]] where one byte is always transferred. | |||
=== See Also === | === See Also === | ||
* [[TXY]] | * [[TXY]] | ||
* [[TYA]] | * [[TYA]] | ||
* [[STY]] | |||
=== External Links === | === External Links === | ||
* [[Eyes & Lichty]] | * [[Eyes & Lichty]], [https://archive.org/details/0893037893ProgrammingThe65816/page/521 page 521] on TYX | ||
* [[Labiak]] | * [[Labiak]], [https://archive.org/details/Programming_the_65816/page/n212 page 202] on TYX | ||
* snes9x implementation of TYX: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L2486 | * snes9x implementation of TYX: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L2486 | ||
Latest revision as of 15:32, 10 August 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Implied (type 1) | BB | 1 byte | 2 cycles | ||||
| Flags Affected | |||||||
|---|---|---|---|---|---|---|---|
| N | V | M | X | D | I | Z | C |
| N | . | . | . | . | . | Z | . |
TYX is a 65c816 instruction that transfers the value of the Y index register to the X index register. The x flag determines whether 8 or 16 bits are transferred.
The negative flag will then match the most significant bit of the transferred value. The zero flag will indicate whether the transferred value is zero (set if zero).
Syntax
TYX
TYX works even in emulation mode where one byte is always transferred.
See Also
External Links
- Eyes & Lichty, page 521 on TYX
- Labiak, page 202 on TYX
- snes9x implementation of TYX: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L2486