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TAY: Difference between revisions
From SnesLab
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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) | ||
|A8 | |A8 | ||
|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 Affected | !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 31: | Line 31: | ||
|. | |. | ||
|. | |. | ||
| | |Z | ||
|. | |. | ||
|} | |} | ||
| Line 52: | Line 52: | ||
|16 bits are transferred | |16 bits are transferred | ||
|} | |} | ||
==== Syntax ==== | |||
<pre> | |||
TAY | |||
</pre> | |||
=== See Also === | === See Also === | ||
* [[TAX]] | * [[TAX]] | ||
* [[TYA]] | |||
* [[TAD]] | |||
* [[TCS]] | |||
=== External Links === | === External Links === | ||
* [[Eyes & Lichty]] | * [[Eyes & Lichty]], [https://archive.org/details/0893037893ProgrammingThe65816/page/509 page 509] on TAY | ||
* [[Labiak]] | * [[Labiak]], [https://archive.org/details/Programming_the_65816/page/n200 page 190] on TAY | ||
* [[MCS6500 Manual]] | * 7.13 on [[MCS6500 Manual]], [https://archive.org/details/mos_microcomputers_programming_manual/page/n119 page 101] on TAY | ||
* [[Leventhal]] | * [[Leventhal]], [https://archive.org/details/6502-assembly-language-programming/page/n149 page 3-100] on TAY | ||
* snes9x implementation of TAY: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L2289 | * snes9x implementation of TAY: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L2289 | ||
[[Category:ASM]] | [[Category:ASM]] | ||
[[Category:Inherited from 6502]] | [[Category:Inherited from 6502]] | ||
[[Category:Transfer Instructions]] | |||
[[Category:Implied Instructions]] | |||
[[Category:Two-cycle Instructions]] | |||
Latest revision as of 22:50, 7 August 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Implied (type 1) | A8 | 1 byte | 2 cycles | ||||
| Flags Affected | |||||||
|---|---|---|---|---|---|---|---|
| N | V | M | X | D | I | Z | C |
| N | . | . | . | . | . | Z | . |
TAY is a 65x instruction that transfers the value of the accumulator to the Y index register.
| Instruction Behavior | ||
|---|---|---|
| 8-bit accumulator (m=1) | 16-bit accumulator (m=0) | |
| 8-bit index registers (x=1) | 8 bits are transferred | 8 bits are transferred (low byte of accumulator) |
| 16-bit index registers (x=0) | 16 bits are transferred | 16 bits are transferred |
Syntax
TAY
See Also
External Links
- Eyes & Lichty, page 509 on TAY
- Labiak, page 190 on TAY
- 7.13 on MCS6500 Manual, page 101 on TAY
- Leventhal, page 3-100 on TAY
- snes9x implementation of TAY: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L2289