CMP (SPC700): Difference between revisions

Revision as of 18:18, 22 July 2023


Basic Info
Addressing Mode	Opcode	Length	Speed
immediate	68	2 bytes	2 cycles
	66	1 bytes	3 cycles
	64	2 bytes	3 cycles
	74	2 bytes	4 cycles
	65	3 bytes	4 cycles
	75	3 bytes	5 cycles
	76	3 bytes	5 cycles
	67	2 byte	6 cycles
	77	2 bytes	6 cycles
	79	1 bytes	5 cycles
	69	3 bytes	6 cycles
	78	3 bytes	5 cycles
	C8	2 bytes	2 cycles
	3E	2 bytes	3 cycles
	1E	3 bytes	4 cycles
	AD	2 bytes	2 cycles
	7E	2 bytes	3 cycles
	5E	3 bytes	4 cycles


Flags Affected
N	V	P	B	H	I	Z	C
	.	.	.	.	.

CMP is an SPC700 instruction that compares two operands. The right operand is subtracted from the left operand, but the difference is not stored anywhere - the side effect is the N, Z, and C flags being modified.

External Links

Official Super Nintendo development manual on CMP: Appendix C-5 of Book I

@@ Line 120: / Line 120: @@
 |}
-'''CMP''' is an [[SPC700]] instruction that compares.
+'''CMP''' is an [[SPC700]] instruction that compares two operands.  The right operand is subtracted from the left operand, but the difference is not stored anywhere - the side effect is the N, Z, and C flags being modified.
 === See Also ===