6502 Instruction Set

Instruction	Hex	Cycles	Bytes	Description	Addressing
ADC #n	69	2	2	Add with carry to A	Immediate
ADC nn	6D	4	3	Add with carry to A	Absolute
ADC n	65	3	2	Add with carry to A	Zero Page
ADC (n,X)	61	6	2	Add with carry to A	Indirect X
ADC (n),Y	71	5+	2	Add with carry to A	Indirect Y
ADC n,X	75	4	2	Add with carry to A	Zero Page X
ADC nn,X	7D	4+	3	Add with carry to A	Absolute X
ADC nn,Y	79	4+	3	Add with carry to A	Absolute Y
Instruction	Hex	Cycles	Bytes	Description	Addressing
AND #n	29	2	2	AND to A	Immediate
AND nn	2D	4	3	AND to A	Absolute
AND n	25	3	2	AND to A	Zero Page
AND (n,X)	21	6	2	AND to A	Indirect X
AND (n),Y	31	5+	2	AND to A	Indirect Y
AND n,X	35	4	2	AND to A	Zero Page X
AND nn,X	3D	4+	3	AND to A	Absolute X
AND nn,Y	39	4+	3	AND to A	Absolute Y
Instruction	Hex	Cycles	Bytes	Description	Addressing
ASL	0A	2	2	Arithmetic Shift Left	Immediate
ASL nn	0E	4	3	Arithmetic Shift Left	Absolute
ASL n	06	3	2	Arithmetic Shift Left	Zero Page
ASL n,X	16	4	2	Arithmetic Shift Left	Zero Page X
ASL nn,X	1E	4+	3	Arithmetic Shift Left	Absolute X
Instruction	Hex	Cycles	Bytes	Description	Addressing
BCC n	90	2+	2	Branch if carry clear (C=0)	Relative
BCS n	B0	2+	2	Branch if carry set (C=1)	Relative
BEQ n	F0	2+	2	Branch if equal (Z=1)	Relative
BNE n	D0	2+	2	Branch if not equal (Z=0)	Relative
BMI n	30	2+	2	Branch if minus (N=1)	Relative
BPL n	10	2+	2	Branch if plus (N=0)	Relative
BVC n	50	2+	2	Branch if overflow clear (V=0)	Relative
BVS n	70	2+	2	Branch if overflow set (V=1)	Relative
Instruction	Hex	Cycles	Bytes	Description	Addressing
BIT nn	2C	4	3	AND with A (A unchanged)	Absolute
BIT n	24	3	2	AND with A (A unchanged)	Absolute
Instruction	Hex	Cycles	Bytes	Description	Addressing
BRK	00	7	1	Break (force interrupt)	None
Instruction	Hex	Cycles	Bytes	Description	Addressing
CLC	18	2	1	Clear Carry	None
CLD	D8	2	1	Clear decimal mode	None
CLI	58	2	1	Clear IRQ disable	None
CLV	B8	2	1	Clear overflow	None
Instruction	Hex	Cycles	Bytes	Description	Addressing
CMP #n	C9	2	2	Compare with A	Immediate
CMP nn	CD	4	3	Compare with A	Absolute
CMP n	C5	3	2	Compare with A	Zero Page
CMP (n,X)	C1	6	2	Compare with A	Indirect X
CMP (n),Y	D1	5+	2	Compare with A	Zero Page X
CMP n,X	D5	4	2	Compare with A	Absolute X
CMP nn,X	DD	4+	3	Compare with A	Absolute X
CMP nn,Y	D9	4+	3	Compare with A	Absolute Y
Instruction	Hex	Cycles	Bytes	Description	Addressing
CPX #n	E0	2	2	Compare with X	Immediate
CPX nn	EC	4	3	Compare with X	Absolute
CPX n	E4	3	2	Compare with X	Zero Page
Instruction	Hex	Cycles	Bytes	Description	Addressing
CPY #n	C0	2	2	Compare with Y	Immediate
CPY nn	CC	4	3	Compare with Y	Absolute
CPY n	C4	3	2	Compare with Y	Zero Page
Instruction	Hex	Cycles	Bytes	Description	Addressing
DEC nn	CE	6	3	Decrement by one	Absolute
DEC n	C6	5	2	Decrement by one	Zero Page
DEC n,X	D6	6	2	Decrement by one	Zero Page X
DEC nn,X	DE	7	3	Decrement by one	Absolute X
Instruction	Hex	Cycles	Bytes	Description	Addressing
DEX	CA	2	1	Decrement X by one	None
DEY	88	2	1	Decrement Y by one	None
Instruction	Hex	Cycles	Bytes	Description	Addressing
EOR #n	49	2	2	XOR to A	Immediate
EOR nn	4D	4	3	XOR to A	Absolute
EOR n	45	3	2	XOR to A	Zero Page
EOR (n,X)	41	6	2	XOR to A	Indirect X
EOR (n),Y	51	5+	2	XOR to A	Indirect Y
EOR n,X	55	4	2	XOR to A	Zero Page X
Instruction	Hex	Cycles	Bytes	Description	Addressing
INC nn	EE	6	3	Increment by one	Absolute
INC n	E6	5	2	Increment by one	Zero Page
INC n,X	F6	6	2	Increment by one	Zero Page X
INC nn,X	FE	7	3	Increment by one	Absolute X
Instruction	Hex	Cycles	Bytes	Description	Addressing
INX	E8	2	1	Increment X by one	None
INY	C8	2	1	Increment Y by one	None
Instruction	Hex	Cycles	Bytes	Description	Addressing
JMP nn	4C	3	3	Jump to new location	Absolute
JMP (nn)	6C	5	3	Jump to new location	Indirect
Instruction	Hex	Cycles	Bytes	Description	Addressing
JSR nn	20	6	3	Jump to subroutine	Absolute
Instruction	Hex	Cycles	Bytes	Description	Addressing
LDA #n	A9	2	2	Load A	Immediate
LDA nn	AD	4	3	Load A	Absolute
LDA n	A5	3	2	Load A	Zero Page
LDA (n,X)	A1	6	2	Load A	Indirect X
LDA (n),Y	B1	5+	2	Load A	Indirect Y
LDA n,X	B5	4	2	Load A	Zero Page X
LDA nn,X	BD	4+	3	Load A	Absolute X
LDA nn,Y	B9	4+	3	Load A	Absolute Y
Instruction	Hex	Cycles	Bytes	Description	Addressing
LDX #n	A2	2	2	Load X	Immediate
LDX nn	AE	4	3	Load X	Absolute
LDX n	A6	3	2	Load X	Zero Page
LDX nn,Y	BE	4+	3	Load X	Absolute Y
LDX n,Y	B6	4	2	Load X	Zero Page Y
Instruction	Hex	Cycles	Bytes	Description	Addressing
LDY #n	A0	2	2	Load Y	Immediate
LDY nn	AC	4	3	Load Y	Absolute
LDY n	A4	3	2	Load Y	Zero Page
LDY n,X	B4	4	2	Load Y	Zero Page X
LDY nn,X	BC	4+	3	Load Y	Absolute X
Instruction	Hex	Cycles	Bytes	Description	Addressing
LSR nn	4E	6	3	Logical shift right	Absolute
LSR n	46	5	2	Logical shift right	Zero Page
LSR	4A	2	1	Logical shift right	Accumulator
LSR n,X	56	6	2	Logical shift right	Zero Page X
LSR nn,X	5E	7	3	Logical shift right	Absolute X
Instruction	Hex	Cycles	Bytes	Description	Addressing
NOP	EA	2	1	No operation	None
Instruction	Hex	Cycles	Bytes	Description	Addressing
ORA #n	09	2	2	OR to A	Immediate
ORA nn	0D	4	3	OR to A	Absolute
ORA n	05	3	2	OR to A	Zero Page
ORA (n,X)	01	6	2	OR to A	Indirect X
ORA (n),Y	11	5+	2	OR to A	Indirect Y
ORA n,X	15	4	2	OR to A	Zero Page X
ORA nn,X	1D	4+	3	OR to A	Absolute X
ORA nn,Y	19	4+	3	OR to A	Absolute Y
Instruction	Hex	Cycles	Bytes	Description	Addressing
PHA	48	3	1	Push A onto the stack	None
PHP	08	3	1	Push the processor state onto the stack	None
PLA	68	4	1	Pull/Pop A from the stack	None
PLP	28	4	1	Pull/Pop the processor state from the stack	None
Instruction	Hex	Cycles	Bytes	Description	Addressing
ROL nn	2E	6	3	Rotate left through carry	Absolute
ROL n	26	5	2	Rotate left through carry	Zero Page
ROL	2A	2	1	Rotate left through carry	Accumulator
ROL n,X	36	6	2	Rotate left through carry	Zero Page X
ROL nn,X	3E	7	3	Rotate left through carry	Absolute X
Instruction	Hex	Cycles	Bytes	Description	Addressing
RTI	40	6	1	Return from interrupt	None
RTS	60	6	1	Return from subroutine	None
Instruction	Hex	Cycles	Bytes	Description	Addressing
SBC #n	E9	2	2	Subtract with borrow from A	Immediate
SBC nn	ED	4	3	Subtract with borrow from A	Absolute
SBC n	E5	3	2	Subtract with borrow from A	Zero Page
SBC (n,X)	E1	6	2	Subtract with borrow from A	Indirect X
SBC (n),Y	F1	5+	2	Subtract with borrow from A	Indirect Y
SBC n,X	F5	4	2	Subtract with borrow from A	Zero Page X
SBC nn,X	FD	4+	3	Subtract with borrow from A	Absolute X
SBC nn,Y	F9	4+	3	Subtract with borrow from A	Absolute Y
Instruction	Hex	Cycles	Bytes	Description	Addressing
SEC	38	2	1	Set carry	None
SED	F8	2	1	Set decimal mode	None
SEI	78	2	1	Set IRQ disable	None
Instruction	Hex	Cycles	Bytes	Description	Addressing
STA nn	8D	4	3	Store A	Absolute
STA n	85	3	2	Store A	Zero Page
STA (n,X)	81	6	2	Store A	Indirect X
STA (n),Y	91	6	2	Store A	Indirect Y
STA n,X	95	4	2	Store A	Zero Page X
STA nn,X	9D	5	3	Store A	Absolute X
STA nn,Y	99	5	3	Store A	Absolute Y
Instruction	Hex	Cycles	Bytes	Description	Addressing
STX nn	8E	4	3	Store X	Absolute
STX n	86	3	2	Store X	Zero Page
STX n,Y	96	4	2	Store X	Zero Page Y
STY nn	8C	4	3	Store Y	Absolute
STY n	84	3	2	Store Y	Zero Page
STY n,X	94	4	2	Store Y	Zero Page X
Instruction	Hex	Cycles	Bytes	Description	Addressing
TAX	AA	2	1	Transfer A to X	None
TAY	A8	2	1	Transfer A to Y	None
TSX	BA	2	1	Transfer stack to X	None
TXA	8A	2	1	Transfer X to A	None
TXS	9A	2	1	Transfer X to stack	None
TYA	98	2	1	Transfer Y to A	None