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
(→See Also: CMP) |
(clobbered -> affected) |
||
| Line 24: | Line 24: | ||
{| class="wikitable" style="float:right;clear:right;width:30%" | {| class="wikitable" style="float:right;clear:right;width:30%" | ||
!colspan="9"|Flags | !colspan="9"|Flags Affected | ||
|+ | |+ | ||
|N | |N | ||
Revision as of 20:44, 19 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