gbops, the most accurate™ opcode table for the Game Boy

Help

Instruction format:

MNEMONIC ARGS
LENGTH DURATION
AFFECTED FLAGS

Example instruction:

XOR A,A
1 4t
Z000

Flags?

The names for the flags that this opcode table uses are:
Z = "Zero", N = "Negative", H = "Half carry" and C = "Carry" (always in that order)
An instruction can do various things to the flags such as always set (1), always reset (0), set or reset depending on the result of the instrucion (letter for flag) or do nothing (-)

How does the search bar work?

The search bar works by comparing properties of an opcode to a given number/string.
The currently supported properties are length|len, name and number|num|opcode|op|#.
The currently supported comparisions are <, <=, =, >= and >.
Numbers can be given in bases 16-10-8 and 2.

Some search examples:

.name="LD", this searches for all opcodes containing "LD" in their name.
.name="LD" .len=2, this searches for opcodes all containing "LD" in their name and a length of 2.
.name="LD" .len=2 or .opcode=0x76, same as the previous but it also shows all opcodes with index 0x76, which are HALT and BIT 6,(HL)

Help!!! Why isn't the search bar working!?

The search bar is currently a huge WIP and will have tons of bugs, if you find one please report it to The Issue Tracker

Glossary

Groups

x8/lsm: 8-bit Load/Store/Move
x16/lsm: 16-bit Load/Store/Move
x8/alu: 8-bit Arithmetic Logic Unit
x16/alu: 16-bit Arithmetic Logic Unit
x8/rsb: 8-bit ???
control/br: branch
control/misc: misc

Units

T-Edge: A single tick of the Game Boy's clock, from low to high, or high to low - 8,388,608 hz
T-Cycle (t): Two T-Edges - 4,194,304 hz
M-Cycle (m): Four T-Cycles - 1,048,576 hz
h, 0x: Hexidecimal

Types

u8: 8-bit unsigned integer
i8: 8-bit signed integer
u16: 16-bit unsigned integer
(...): pointer dereference

Table Width: Cycle mode:

The search bar is experimental, see help for syntax, it might fail unexpectedly.

Search:

If you find any bugs or something that seems out of place file an issue.

Unprefixed:
--	+0	+1	+2	+3	+4	+5	+6	+7	+8	+9	+A	+B	+C	+D	+E	+F
00+	NOP 1 1m ----	LD BC,u16 3 3m ----	LD (BC),A 1 2m ----	INC BC 1 2m ----	INC B 1 1m Z0H-	DEC B 1 1m Z1H-	LD B,u8 2 2m ----	RLCA 1 1m 000C	LD (u16),SP 3 5m ----	ADD HL,BC 1 2m -0HC	LD A,(BC) 1 2m ----	DEC BC 1 2m ----	INC C 1 1m Z0H-	DEC C 1 1m Z1H-	LD C,u8 2 2m ----	RRCA 1 1m 000C
10+	STOP 2 1m ----	LD DE,u16 3 3m ----	LD (DE),A 1 2m ----	INC DE 1 2m ----	INC D 1 1m Z0H-	DEC D 1 1m Z1H-	LD D,u8 2 2m ----	RLA 1 1m 000C	JR i8 2 3m ----	ADD HL,DE 1 2m -0HC	LD A,(DE) 1 2m ----	DEC DE 1 2m ----	INC E 1 1m Z0H-	DEC E 1 1m Z1H-	LD E,u8 2 2m ----	RRA 1 1m 000C
20+	JR NZ,i8 2 2m-3m ----	LD HL,u16 3 3m ----	LD (HL+),A 1 2m ----	INC HL 1 2m ----	INC H 1 1m Z0H-	DEC H 1 1m Z1H-	LD H,u8 2 2m ----	DAA 1 1m Z-0C	JR Z,i8 2 2m-3m ----	ADD HL,HL 1 2m -0HC	LD A,(HL+) 1 2m ----	DEC HL 1 2m ----	INC L 1 1m Z0H-	DEC L 1 1m Z1H-	LD L,u8 2 2m ----	CPL 1 1m -11-
30+	JR NC,i8 2 2m-3m ----	LD SP,u16 3 3m ----	LD (HL-),A 1 2m ----	INC SP 1 2m ----	INC (HL) 1 3m Z0H-	DEC (HL) 1 3m Z1H-	LD (HL),u8 2 3m ----	SCF 1 1m -001	JR C,i8 2 2m-3m ----	ADD HL,SP 1 2m -0HC	LD A,(HL-) 1 2m ----	DEC SP 1 2m ----	INC A 1 1m Z0H-	DEC A 1 1m Z1H-	LD A,u8 2 2m ----	CCF 1 1m -00C
40+	LD B,B 1 1m ----	LD B,C 1 1m ----	LD B,D 1 1m ----	LD B,E 1 1m ----	LD B,H 1 1m ----	LD B,L 1 1m ----	LD B,(HL) 1 2m ----	LD B,A 1 1m ----	LD C,B 1 1m ----	LD C,C 1 1m ----	LD C,D 1 1m ----	LD C,E 1 1m ----	LD C,H 1 1m ----	LD C,L 1 1m ----	LD C,(HL) 1 2m ----	LD C,A 1 1m ----
50+	LD D,B 1 1m ----	LD D,C 1 1m ----	LD D,D 1 1m ----	LD D,E 1 1m ----	LD D,H 1 1m ----	LD D,L 1 1m ----	LD D,(HL) 1 2m ----	LD D,A 1 1m ----	LD E,B 1 1m ----	LD E,C 1 1m ----	LD E,D 1 1m ----	LD E,E 1 1m ----	LD E,H 1 1m ----	LD E,L 1 1m ----	LD E,(HL) 1 2m ----	LD E,A 1 1m ----
60+	LD H,B 1 1m ----	LD H,C 1 1m ----	LD H,D 1 1m ----	LD H,E 1 1m ----	LD H,H 1 1m ----	LD H,L 1 1m ----	LD H,(HL) 1 2m ----	LD H,A 1 1m ----	LD L,B 1 1m ----	LD L,C 1 1m ----	LD L,D 1 1m ----	LD L,E 1 1m ----	LD L,H 1 1m ----	LD L,L 1 1m ----	LD L,(HL) 1 2m ----	LD L,A 1 1m ----
70+	LD (HL),B 1 2m ----	LD (HL),C 1 2m ----	LD (HL),D 1 2m ----	LD (HL),E 1 2m ----	LD (HL),H 1 2m ----	LD (HL),L 1 2m ----	HALT 1 1m ----	LD (HL),A 1 2m ----	LD A,B 1 1m ----	LD A,C 1 1m ----	LD A,D 1 1m ----	LD A,E 1 1m ----	LD A,H 1 1m ----	LD A,L 1 1m ----	LD A,(HL) 1 2m ----	LD A,A 1 1m ----
80+	ADD A,B 1 1m Z0HC	ADD A,C 1 1m Z0HC	ADD A,D 1 1m Z0HC	ADD A,E 1 1m Z0HC	ADD A,H 1 1m Z0HC	ADD A,L 1 1m Z0HC	ADD A,(HL) 1 2m Z0HC	ADD A,A 1 1m Z0HC	ADC A,B 1 1m Z0HC	ADC A,C 1 1m Z0HC	ADC A,D 1 1m Z0HC	ADC A,E 1 1m Z0HC	ADC A,H 1 1m Z0HC	ADC A,L 1 1m Z0HC	ADC A,(HL) 1 2m Z0HC	ADC A,A 1 1m Z0HC
90+	SUB A,B 1 1m Z1HC	SUB A,C 1 1m Z1HC	SUB A,D 1 1m Z1HC	SUB A,E 1 1m Z1HC	SUB A,H 1 1m Z1HC	SUB A,L 1 1m Z1HC	SUB A,(HL) 1 2m Z1HC	SUB A,A 1 1m Z1HC	SBC A,B 1 1m Z1HC	SBC A,C 1 1m Z1HC	SBC A,D 1 1m Z1HC	SBC A,E 1 1m Z1HC	SBC A,H 1 1m Z1HC	SBC A,L 1 1m Z1HC	SBC A,(HL) 1 2m Z1HC	SBC A,A 1 1m Z1HC
A0+	AND A,B 1 1m Z010	AND A,C 1 1m Z010	AND A,D 1 1m Z010	AND A,E 1 1m Z010	AND A,H 1 1m Z010	AND A,L 1 1m Z010	AND A,(HL) 1 2m Z010	AND A,A 1 1m Z010	XOR A,B 1 1m Z000	XOR A,C 1 1m Z000	XOR A,D 1 1m Z000	XOR A,E 1 1m Z000	XOR A,H 1 1m Z000	XOR A,L 1 1m Z000	XOR A,(HL) 1 2m Z000	XOR A,A 1 1m Z000
B0+	OR A,B 1 1m Z000	OR A,C 1 1m Z000	OR A,D 1 1m Z000	OR A,E 1 1m Z000	OR A,H 1 1m Z000	OR A,L 1 1m Z000	OR A,(HL) 1 2m Z000	OR A,A 1 1m Z000	CP A,B 1 1m Z1HC	CP A,C 1 1m Z1HC	CP A,D 1 1m Z1HC	CP A,E 1 1m Z1HC	CP A,H 1 1m Z1HC	CP A,L 1 1m Z1HC	CP A,(HL) 1 2m Z1HC	CP A,A 1 1m Z1HC
C0+	RET NZ 1 2m-5m ----	POP BC 1 3m ----	JP NZ,u16 3 3m-4m ----	JP u16 3 4m ----	CALL NZ,u16 3 3m-6m ----	PUSH BC 1 4m ----	ADD A,u8 2 2m Z0HC	RST 00h 1 4m ----	RET Z 1 2m-5m ----	RET 1 4m ----	JP Z,u16 3 3m-4m ----	PREFIX CB 1 1m ----	CALL Z,u16 3 3m-6m ----	CALL u16 3 6m ----	ADC A,u8 2 2m Z0HC	RST 08h 1 4m ----
D0+	RET NC 1 2m-5m ----	POP DE 1 3m ----	JP NC,u16 3 3m-4m ----		CALL NC,u16 3 3m-6m ----	PUSH DE 1 4m ----	SUB A,u8 2 2m Z1HC	RST 10h 1 4m ----	RET C 1 2m-5m ----	RETI 1 4m ----	JP C,u16 3 3m-4m ----		CALL C,u16 3 3m-6m ----		SBC A,u8 2 2m Z1HC	RST 18h 1 4m ----
E0+	LD (FF00+u8),A 2 3m ----	POP HL 1 3m ----	LD (FF00+C),A 1 2m ----			PUSH HL 1 4m ----	AND A,u8 2 2m Z010	RST 20h 1 4m ----	ADD SP,i8 2 4m 00HC	JP HL 1 1m ----	LD (u16),A 3 4m ----				XOR A,u8 2 2m Z000	RST 28h 1 4m ----
F0+	LD A,(FF00+u8) 2 3m ----	POP AF 1 3m ZNHC	LD A,(FF00+C) 1 2m ----	DI 1 1m ----		PUSH AF 1 4m ----	OR A,u8 2 2m Z000	RST 30h 1 4m ----	LD HL,SP+i8 2 3m 00HC	LD SP,HL 1 2m ----	LD A,(u16) 3 4m ----	EI 1 1m ----			CP A,u8 2 2m Z1HC	RST 38h 1 4m ----

0xCB Prefixed:
--	+0	+1	+2	+3	+4	+5	+6	+7	+8	+9	+A	+B	+C	+D	+E	+F
00+	RLC B 2 2m Z00C	RLC C 2 2m Z00C	RLC D 2 2m Z00C	RLC E 2 2m Z00C	RLC H 2 2m Z00C	RLC L 2 2m Z00C	RLC (HL) 2 4m Z00C	RLC A 2 2m Z00C	RRC B 2 2m Z00C	RRC C 2 2m Z00C	RRC D 2 2m Z00C	RRC E 2 2m Z00C	RRC H 2 2m Z00C	RRC L 2 2m Z00C	RRC (HL) 2 4m Z00C	RRC A 2 2m Z00C
10+	RL B 2 2m Z00C	RL C 2 2m Z00C	RL D 2 2m Z00C	RL E 2 2m Z00C	RL H 2 2m Z00C	RL L 2 2m Z00C	RL (HL) 2 4m Z00C	RL A 2 2m Z00C	RR B 2 2m Z00C	RR C 2 2m Z00C	RR D 2 2m Z00C	RR E 2 2m Z00C	RR H 2 2m Z00C	RR L 2 2m Z00C	RR (HL) 2 4m Z00C	RR A 2 2m Z00C
20+	SLA B 2 2m Z00C	SLA C 2 2m Z00C	SLA D 2 2m Z00C	SLA E 2 2m Z00C	SLA H 2 2m Z00C	SLA L 2 2m Z00C	SLA (HL) 2 4m Z00C	SLA A 2 2m Z00C	SRA B 2 2m Z00C	SRA C 2 2m Z00C	SRA D 2 2m Z00C	SRA E 2 2m Z00C	SRA H 2 2m Z00C	SRA L 2 2m Z00C	SRA (HL) 2 4m Z00C	SRA A 2 2m Z00C
30+	SWAP B 2 2m Z000	SWAP C 2 2m Z000	SWAP D 2 2m Z000	SWAP E 2 2m Z000	SWAP H 2 2m Z000	SWAP L 2 2m Z000	SWAP (HL) 2 4m Z000	SWAP A 2 2m Z000	SRL B 2 2m Z00C	SRL C 2 2m Z00C	SRL D 2 2m Z00C	SRL E 2 2m Z00C	SRL H 2 2m Z00C	SRL L 2 2m Z00C	SRL (HL) 2 4m Z00C	SRL A 2 2m Z00C
40+	BIT 0,B 2 2m Z01-	BIT 0,C 2 2m Z01-	BIT 0,D 2 2m Z01-	BIT 0,E 2 2m Z01-	BIT 0,H 2 2m Z01-	BIT 0,L 2 2m Z01-	BIT 0,(HL) 2 3m Z01-	BIT 0,A 2 2m Z01-	BIT 1,B 2 2m Z01-	BIT 1,C 2 2m Z01-	BIT 1,D 2 2m Z01-	BIT 1,E 2 2m Z01-	BIT 1,H 2 2m Z01-	BIT 1,L 2 2m Z01-	BIT 1,(HL) 2 3m Z01-	BIT 1,A 2 2m Z01-
50+	BIT 2,B 2 2m Z01-	BIT 2,C 2 2m Z01-	BIT 2,D 2 2m Z01-	BIT 2,E 2 2m Z01-	BIT 2,H 2 2m Z01-	BIT 2,L 2 2m Z01-	BIT 2,(HL) 2 3m Z01-	BIT 2,A 2 2m Z01-	BIT 3,B 2 2m Z01-	BIT 3,C 2 2m Z01-	BIT 3,D 2 2m Z01-	BIT 3,E 2 2m Z01-	BIT 3,H 2 2m Z01-	BIT 3,L 2 2m Z01-	BIT 3,(HL) 2 3m Z01-	BIT 3,A 2 2m Z01-
60+	BIT 4,B 2 2m Z01-	BIT 4,C 2 2m Z01-	BIT 4,D 2 2m Z01-	BIT 4,E 2 2m Z01-	BIT 4,H 2 2m Z01-	BIT 4,L 2 2m Z01-	BIT 4,(HL) 2 3m Z01-	BIT 4,A 2 2m Z01-	BIT 5,B 2 2m Z01-	BIT 5,C 2 2m Z01-	BIT 5,D 2 2m Z01-	BIT 5,E 2 2m Z01-	BIT 5,H 2 2m Z01-	BIT 5,L 2 2m Z01-	BIT 5,(HL) 2 3m Z01-	BIT 5,A 2 2m Z01-
70+	BIT 6,B 2 2m Z01-	BIT 6,C 2 2m Z01-	BIT 6,D 2 2m Z01-	BIT 6,E 2 2m Z01-	BIT 6,H 2 2m Z01-	BIT 6,L 2 2m Z01-	BIT 6,(HL) 2 3m Z01-	BIT 6,A 2 2m Z01-	BIT 7,B 2 2m Z01-	BIT 7,C 2 2m Z01-	BIT 7,D 2 2m Z01-	BIT 7,E 2 2m Z01-	BIT 7,H 2 2m Z01-	BIT 7,L 2 2m Z01-	BIT 7,(HL) 2 3m Z01-	BIT 7,A 2 2m Z01-
80+	RES 0,B 2 2m ----	RES 0,C 2 2m ----	RES 0,D 2 2m ----	RES 0,E 2 2m ----	RES 0,H 2 2m ----	RES 0,L 2 2m ----	RES 0,(HL) 2 4m ----	RES 0,A 2 2m ----	RES 1,B 2 2m ----	RES 1,C 2 2m ----	RES 1,D 2 2m ----	RES 1,E 2 2m ----	RES 1,H 2 2m ----	RES 1,L 2 2m ----	RES 1,(HL) 2 4m ----	RES 1,A 2 2m ----
90+	RES 2,B 2 2m ----	RES 2,C 2 2m ----	RES 2,D 2 2m ----	RES 2,E 2 2m ----	RES 2,H 2 2m ----	RES 2,L 2 2m ----	RES 2,(HL) 2 4m ----	RES 2,A 2 2m ----	RES 3,B 2 2m ----	RES 3,C 2 2m ----	RES 3,D 2 2m ----	RES 3,E 2 2m ----	RES 3,H 2 2m ----	RES 3,L 2 2m ----	RES 3,(HL) 2 4m ----	RES 3,A 2 2m ----
A0+	RES 4,B 2 2m ----	RES 4,C 2 2m ----	RES 4,D 2 2m ----	RES 4,E 2 2m ----	RES 4,H 2 2m ----	RES 4,L 2 2m ----	RES 4,(HL) 2 4m ----	RES 4,A 2 2m ----	RES 5,B 2 2m ----	RES 5,C 2 2m ----	RES 5,D 2 2m ----	RES 5,E 2 2m ----	RES 5,H 2 2m ----	RES 5,L 2 2m ----	RES 5,(HL) 2 4m ----	RES 5,A 2 2m ----
B0+	RES 6,B 2 2m ----	RES 6,C 2 2m ----	RES 6,D 2 2m ----	RES 6,E 2 2m ----	RES 6,H 2 2m ----	RES 6,L 2 2m ----	RES 6,(HL) 2 4m ----	RES 6,A 2 2m ----	RES 7,B 2 2m ----	RES 7,C 2 2m ----	RES 7,D 2 2m ----	RES 7,E 2 2m ----	RES 7,H 2 2m ----	RES 7,L 2 2m ----	RES 7,(HL) 2 4m ----	RES 7,A 2 2m ----
C0+	SET 0,B 2 2m ----	SET 0,C 2 2m ----	SET 0,D 2 2m ----	SET 0,E 2 2m ----	SET 0,H 2 2m ----	SET 0,L 2 2m ----	SET 0,(HL) 2 4m ----	SET 0,A 2 2m ----	SET 1,B 2 2m ----	SET 1,C 2 2m ----	SET 1,D 2 2m ----	SET 1,E 2 2m ----	SET 1,H 2 2m ----	SET 1,L 2 2m ----	SET 1,(HL) 2 4m ----	SET 1,A 2 2m ----
D0+	SET 2,B 2 2m ----	SET 2,C 2 2m ----	SET 2,D 2 2m ----	SET 2,E 2 2m ----	SET 2,H 2 2m ----	SET 2,L 2 2m ----	SET 2,(HL) 2 4m ----	SET 2,A 2 2m ----	SET 3,B 2 2m ----	SET 3,C 2 2m ----	SET 3,D 2 2m ----	SET 3,E 2 2m ----	SET 3,H 2 2m ----	SET 3,L 2 2m ----	SET 3,(HL) 2 4m ----	SET 3,A 2 2m ----
E0+	SET 4,B 2 2m ----	SET 4,C 2 2m ----	SET 4,D 2 2m ----	SET 4,E 2 2m ----	SET 4,H 2 2m ----	SET 4,L 2 2m ----	SET 4,(HL) 2 4m ----	SET 4,A 2 2m ----	SET 5,B 2 2m ----	SET 5,C 2 2m ----	SET 5,D 2 2m ----	SET 5,E 2 2m ----	SET 5,H 2 2m ----	SET 5,L 2 2m ----	SET 5,(HL) 2 4m ----	SET 5,A 2 2m ----
F0+	SET 6,B 2 2m ----	SET 6,C 2 2m ----	SET 6,D 2 2m ----	SET 6,E 2 2m ----	SET 6,H 2 2m ----	SET 6,L 2 2m ----	SET 6,(HL) 2 4m ----	SET 6,A 2 2m ----	SET 7,B 2 2m ----	SET 7,C 2 2m ----	SET 7,D 2 2m ----	SET 7,E 2 2m ----	SET 7,H 2 2m ----	SET 7,L 2 2m ----	SET 7,(HL) 2 4m ----	SET 7,A 2 2m ----