We've just updated MediaWiki and its underlying software. If anything doesn't look or work quite right, please mention it to us. --RanAS
TYX: Difference between revisions
From SnesLab
(added E&L page) |
(→Syntax: how many bytes in emulation mode) |
||
| (23 intermediate revisions by the same user not shown) | |||
| Line 1: | Line 1: | ||
{| class="wikitable" style="float:right;clear:right;width:40%" | |||
{| class="wikitable" style="float:right;clear:right;width: | |||
!colspan="8"|Basic Info | !colspan="8"|Basic Info | ||
|+ | |+ | ||
| Line 9: | Line 7: | ||
|'''Speed''' | |'''Speed''' | ||
|+ | |+ | ||
| | |[[Implied]] (type 1) | ||
|BB | |BB | ||
|1 byte | |1 byte | ||
| Line 16: | Line 14: | ||
{| 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 | ||
|. | |. | ||
|. | |. | ||
| Line 33: | Line 31: | ||
|. | |. | ||
|. | |. | ||
| | |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 ==== | |||
<pre> | |||
TYX | |||
</pre> | |||
TYX works even in [[emulation mode]] where one byte is always transferred. | |||
=== See Also === | === See Also === | ||
* [[TXY]] | * [[TXY]] | ||
* [[TYA]] | |||
* [[STY]] | |||
=== External Links === | === External Links === | ||
* [[Eyes & Lichty]] page on TYX | * [[Eyes & Lichty]], [https://archive.org/details/0893037893ProgrammingThe65816/page/521 page 521] on TYX | ||
* [[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 | |||
[[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) | 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