We've just updated MediaWiki and its underlying software. If anything doesn't look or work quite right, please mention it to us. --RanAS

SBC (Super FX)

From SnesLab
Revision as of 12:29, 23 July 2024 by Xetheria (talk | contribs) (made GSU links shorter)
Jump to: navigation, search
Basic Info
Addressing Mode Opcode Length ROM Speed RAM Speed Cache Speed
Implied (type 1) 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, ADC and SUB, this one can only be used with registers, not with constant values since since the ALT3 version of SUB is a CMP instead.

The ALT0 state is restored.

The source and destination registers should be specified in advance using WITH, FROM, or TO. Otherwise, R0 serves as the default.

Syntax

SBC Rn

Example

Let:

Sreg : R4
Dreg : R6
R4 = 5682h
R5 = 3609h
CY = 1

After executing SBC R5:

R6 = 2079h
CY = 0

See Also

Reference