CPY

Compare Memory and Index Y

Operation: Y - M

N V - B D I Z C
/ . . . . . / /

Addressing Mode	Assembly Language Form	OP CODE	No. Bytes	No. Cycles
Immediate	CPY #$FF	$C0	2	2
ZeroPage	CPY $FF	$C4	2	3
Absolute	CPY $FFFF	$CC	3	4

For penalty cycles on the 65816, check the desired addressing mode.