We've just updated MediaWiki and its underlying software. If anything doesn't look or work quite right, please mention it to us. --RanAS
DEY: Difference between revisions
From SnesLab
(→See Also: * DEC (SPC700)) |
(→See Also: * DEC (Super FX)) |
||
| Line 48: | Line 48: | ||
* [[INY]] | * [[INY]] | ||
* [[DEC (SPC700)]] | * [[DEC (SPC700)]] | ||
* [[DEC (Super FX)]] | |||
=== External Links === | === External Links === | ||
Revision as of 02:55, 17 July 2024
| 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. DEY ignores the decimal flag.
Syntax
DEY
See Also
External Links
- Eyes & Lichty page 453, on DEY: https://archive.org/details/0893037893ProgrammingThe65816/page/453
- 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