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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]] page 521, on TYX: https://archive.org/details/0893037893ProgrammingThe65816/page/n547
* [[Eyes & Lichty]], [https://archive.org/details/0893037893ProgrammingThe65816/page/521 page 521] on TYX
* [[Labiak]] page on TYX: https://archive.org/details/Programming_the_65816/page/n212
* [[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


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[[Category:Transfer Instructions]]
[[Category:Transfer Instructions]]
[[Category:One-byte 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) 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