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CPY: Difference between revisions

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* [[Leventhal]] page on CPY: https://archive.org/details/6502-assembly-language-programming/page/n108
* [[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
* 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


[[Category:ASM]]
[[Category:ASM]]
[[Category:Group Three Instructions]]
[[Category:Group Three Instructions]]
[[Category:Inherited from 6502]]
[[Category:Inherited from 6502]]

Revision as of 04:03, 18 May 2023

CPY (Compare Y) is a 65x instruction that compares the value of the Y index register.

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 Clobbered
N V M X D I Z C
. . . . .

See Also

External Links