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INY: Difference between revisions
From SnesLab
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'''INY''' is a 65x instruction that increments the [[Y index register]] by one. The state of the [[decimal flag]] has no effect on the behavior of INY. | '''INY''' is a 65x instruction that increments the [[Y index register]] by one. The state of the [[decimal flag]] has no effect on the behavior of INY. Unlike [[ADC]], INY never affects the [[carry flag]]. | ||
==== Syntax ==== | ==== Syntax ==== | ||
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=== External Links === | === External Links === | ||
* [[Eyes & Lichty]] | * [[Eyes & Lichty]], [https://archive.org/details/0893037893ProgrammingThe65816/page/458 page 458] on INY | ||
* [[Labiak]] | * [[Labiak]], [https://archive.org/details/Programming_the_65816/page/n154 page 144] on INY | ||
* [[MCS6500 Manual]] | * 7.5 on [[MCS6500 Manual]], [https://archive.org/details/mos_microcomputers_programming_manual/page/n115 page 97] on INY | ||
* [[Carr]] | * [[Carr]], [https://archive.org/details/6502UsersManual/page/n274 page 261] on INY | ||
* [[Leventhal]] | * [[Leventhal]], [https://archive.org/details/6502-assembly-language-programming/page/n117 page 3-68] on INY | ||
* snes9x implementation of INY: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L1576 | * snes9x implementation of INY: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L1576 | ||
* Clark, Bruce. http://www.6502.org/tutorials/65c816opcodes.html#6.1.1.3 | |||
[[Category:ASM]] | [[Category:ASM]] | ||
Latest revision as of 20:08, 12 August 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Implied (type 1) | C8 | 1 byte | 2 cycles | ||||
| Flags Affected | |||||||
|---|---|---|---|---|---|---|---|
| N | V | M | X | D | I | Z | C |
| N | . | . | . | . | . | Z | . |
INY is a 65x instruction that increments the Y index register by one. The state of the decimal flag has no effect on the behavior of INY. Unlike ADC, INY never affects the carry flag.
Syntax
INY
See Also
External Links
- Eyes & Lichty, page 458 on INY
- Labiak, page 144 on INY
- 7.5 on MCS6500 Manual, page 97 on INY
- Carr, page 261 on INY
- Leventhal, page 3-68 on INY
- snes9x implementation of INY: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L1576
- Clark, Bruce. http://www.6502.org/tutorials/65c816opcodes.html#6.1.1.3