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DEY: Difference between revisions
From SnesLab
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* [[Eyes & Lichty]] page 453, on DEY: https://archive.org/details/0893037893ProgrammingThe65816/page/n479 | * [[Eyes & Lichty]] page 453, on DEY: https://archive.org/details/0893037893ProgrammingThe65816/page/n479 | ||
* [[Labiak]] page 140 on DEY: https://archive.org/details/Programming_the_65816/page/n150 | * [[Labiak]] page 140 on DEY: https://archive.org/details/Programming_the_65816/page/n150 | ||
* [[MCS6500 Manual]] page on DEY: https://archive.org/details/mos_microcomputers_programming_manual/page/n116 | * [[MCS6500 Manual]] page 98 on DEY: https://archive.org/details/mos_microcomputers_programming_manual/page/n116 | ||
* [[Carr]] page 258 on DEY: https://archive.org/details/6502UsersManual/page/n271 | * [[Carr]] page 258 on DEY: https://archive.org/details/6502UsersManual/page/n271 | ||
* [[Leventhal]] page 3-62 on DEY: https://archive.org/details/6502-assembly-language-programming/page/n111 | * [[Leventhal]] page 3-62 on DEY: https://archive.org/details/6502-assembly-language-programming/page/n111 | ||
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[[Category:Inherited from 6502]] | [[Category:Inherited from 6502]] | ||
[[Category:One-byte Instructions]] | [[Category:One-byte Instructions]] | ||
[[Category:Implied Instructions]] | |||
[[Category:Two-cycle Instructions]] | |||
Latest revision as of 11:40, 14 December 2023
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Implied (type 1) | 88 | 1 byte | 2 cycles | ||||
| Flags Affected | |||||||
|---|---|---|---|---|---|---|---|
| N | V | M | X | D | I | Z | C |
| . | . | . | . | . | . | ||
DEY is a 65x instruction that decrements the Y index register by one.
See Also
External Links
- Eyes & Lichty page 453, on DEY: https://archive.org/details/0893037893ProgrammingThe65816/page/n479
- Labiak page 140 on DEY: https://archive.org/details/Programming_the_65816/page/n150
- MCS6500 Manual page 98 on DEY: https://archive.org/details/mos_microcomputers_programming_manual/page/n116
- Carr page 258 on DEY: https://archive.org/details/6502UsersManual/page/n271
- Leventhal page 3-62 on DEY: https://archive.org/details/6502-assembly-language-programming/page/n111
- snes9x implementation of DEY: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L1514