SBC (SPC700): Difference between revisions

Revision as of 18:35, 22 July 2023


Basic Info
Addressing Mode	Opcode	Length	Speed
immediate	A8	2 bytes	2 cycles
	A6	1 byte	3 cycles
	A4	2 bytes	3 cycles
	B4	2 bytes	4 cycles
	A5	3 bytes	4 cycles
	B5	3 bytes	5 cycles
	B6	3 bytes	5 cycles
	A7	2 bytes	6 cycles
	B7	2 bytes	6 cycles
	B9	1 byte	5 cycles
	A9	3 bytes	6 cycles
	B8	3 bytes	5 cycles


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

SBC (Subtract) is an SPC700 instruction that subtracts the right operand and the inverse of the carry flag from the left operand. Often, the left operand is the accumulator.

External Links

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

@@ Line 90: / Line 90: @@
 |}
-'''SBC''' is an [[SPC700]] instruction that subtracts.
+'''SBC''' (Subtract) is an [[SPC700]] instruction that subtracts the right operand and the inverse of the [[carry flag]] from the left operand.  Often, the left operand is the [[accumulator]].
 === See Also ===