SBC (Super FX): Difference between revisions

Latest revision as of 17:33, 29 November 2023


Basic Info
Opcode	Length	ROM Speed	RAM Speed	Cache Speed
3D6n	2 bytes	6 cycles	6 cycles	2 cycle


Flags Affected
B	ALT1	ALT2	O/V	S	CY	Z
0	0	0

SBC (SuBtract with Carry) is a Super FX instruction that performs a subtraction with regards to the carry flag. Unlike ADD (Super FX), ADC (Super FX) and SUB (Super FX), this one can only be used with registers, not with constant values since since the ALT3 version of SUB is a CMP (Super FX) instead.

Reference

page 2-9-108 of Book II of the official Super Nintendo development manual

@@ Line 1: / Line 1: @@
-'''SBC''' (Subtract) is a [[Super FX]] instruction that performs a subtraction.
+{| class="wikitable" style="float:right;clear:right;width:40%"
+!colspan="8"|Basic Info
+|+
+|'''Opcode'''
+|'''Length'''
+|'''ROM Speed'''
+|'''RAM Speed'''
+|'''Cache Speed'''
+|+
+|3D6n
+|2 bytes
+|6 cycles
+|6 cycles
+|2 cycle
+|}
+{| class="wikitable" style="float:right;clear:right;width:30%"
+!colspan="9"|Flags Affected
+|+
+|B
+|[[ALT1]]
+|[[ALT2]]
+|[[O/V]]
+|S
+|[[CY]]
+|Z
+|+
+|0
+|0
+|0
+|
+|
+|
+|
+|}
+'''SBC''' (SuBtract with Carry) is a [[Super FX]] instruction that performs a subtraction with regards to the [[CY|carry flag]].
+Unlike [[ADD (Super FX)]], [[ADC (Super FX)]] and [[SUB (Super FX)]], this one can only be used with registers, not with constant values since since the ALT3 version of SUB is a [[CMP (Super FX)]] instead.
 === See Also ===
 * [[SBC]]
 * [[ADC (Super FX)]]
+* [[SUB (Super FX)]]
 === Reference ===
@@ Line 10: / Line 48: @@
 [[Category:ASM]]
 [[Category:Super FX]]
+[[Category:Two-byte Instructions]]