We've just updated MediaWiki and its underlying software. If anything doesn't look or work quite right, please mention it to us. --RanAS
CPY: Difference between revisions
From SnesLab
(added asterisks to number of cycles) |
(linkify DP) |
||
| Line 17: | Line 17: | ||
|4 cycles* | |4 cycles* | ||
|+ | |+ | ||
| | |[[Direct Page Addressing|Direct Page]] | ||
|C4 | |C4 | ||
|2 bytes | |2 bytes | ||
Revision as of 06:57, 20 November 2023
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Addressing Mode | Opcode | Length | Speed | ||||
| Immediate | C0 | 2 bytes* | 2 cycles* | ||||
| Absolute | CC | 3 bytes | 4 cycles* | ||||
| Direct Page | C4 | 2 bytes | 3 cycles* | ||||
| Flags Affected | ||||||||
|---|---|---|---|---|---|---|---|---|
| N | V | M | X | D | I | Z | C | |
| . | . | . | . | . | ||||
CPY (Compare Y) is a 65x instruction that compares the value of the Y index register.
See Also
External Links
- Eyes & Lichty page on CPY: https://archive.org/details/0893037893ProgrammingThe65816/page/n576
- Labiak page on CPY: https://archive.org/details/Programming_the_65816/page/n147
- MCS6500 Manual page on CPY: https://archive.org/details/mos_microcomputers_programming_manual/page/n117
- Carr page on CPY: https://archive.org/details/6502UsersManual/page/n269
- Leventhal page on CPY: https://archive.org/details/6502-assembly-language-programming/page/n108
- snes9x implementation of CPY: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L442
- undisbeliever on CPY: https://undisbeliever.net/snesdev/65816-opcodes.html#cpy-compare-index-register-y-with-memory