SBC

Basic Info
Addressing Mode	Opcode	Length	Speed
Immediate	E9	2 bytes	2 cycles*
Absolute	ED	3 bytes	4 cycles*
Absolute Long	EF	4 bytes	5 cycles*
Direct Page	E5	2 bytes	3 cycles*
Direct Page Indirect	F2	2 bytes	5 cycles*
Direct Page Indirect Long	E7	2 bytes	6 cycles*
absolute indexed by X	FD	3 bytes	4 cycles*
absolute long indexed by X	FF	4 bytes	5 cycles*
absolute indexed by Y	F9	3 bytes	4 cycles*
direct page indexed by X	F5	2 bytes	4 cycles*
direct page indirect indexed by X	E1	2 bytes	6 cycles*
direct page indirect indexed by Y	F1	2 bytes	5 cycles*
direct page indirect long indexed by Y	F7	2 bytes	6 cycles*
Stack Relative	E3	2 bytes	4 cycles*
stack relative indirect indexed by Y	F3	2 bytes	7 cycles*

Flags Affected
N	V	M	X	D	I	Z	C
		.	.	.	.

SBC (Subtract with Carry/Borrow) is 65x instruction that performs a subtraction.

See Also

• ADC
• SBC (SPC700)

External Links

• Eyes & Lichty page 497, on SBC: https://archive.org/details/0893037893ProgrammingThe65816/page/n523
• Labiak page 179 on SBC: https://archive.org/details/Programming_the_65816/page/n189
• MCS6500 Manual page on SBC: https://archive.org/details/mos_microcomputers_programming_manual/page/n29
• Carr page on SBC: https://archive.org/details/6502UsersManual/page/n284
• Leventhal page 3-91 on SBC: https://archive.org/details/6502-assembly-language-programming/page/n140
• snes9x implementation of SBC: https://github.com/snes9xgit/snes9x/blob/master/cpuops.cpp#L1133
• undisbeliever on SBC: https://undisbeliever.net/snesdev/65816-opcodes.html#sbc-subtract-with-borrow-from-accumulator