Appendix I

8051 Instructions in numerical Order

Abbreviations:	direct	=	8-bit DATA address in internal memory
	const8	=	8-bit constant in CODE memory
	const16	=	16-bit constant in CODE memory
	addr16	=	16-bit long CODE address
	addr11	=	11-bit absolute CODE address
	rel	=	signed 8-bit relative CODE address
	bit	=	8-bit BIT address in internal memory

Opcode	Mnemonic	Operands	Bytes	Flags				Cycles
00	NOP		1					1
01	AJMP	addr11	2					2
02	LJMP	addr16	3					2
03	RR	A	1					1
04	INC	A	1				P	1
05	INC	direct	2					1
06	INC	@R0	1					1
07	INC	@R1	1					1
08	INC	R0	1					1
09	INC	R1	1					1
0A	INC	R2	1					1
0B	INC	R3	1					1
0C	INC	R4	1					1
0D	INC	R5	1					1
0E	INC	R6	1					1
0F	INC	R7	1					1
10	JBC	bit, rel	3					2
11	ACALL	addr11	2					2
12	LCALL	addr16	3					2
13	RRC	A	1	CY			P	1
14	DEC	A	1				P	1
15	DEC	direct	2					1
16	DEC	@R0	1					1
17	DEC	@R1	1					1
18	DEC	R0	1					1
19	DEC	R1	1					1
1A	DEC	R2	1					1
1B	DEC	R3	1					1
1C	DEC	R4	1					1
1D	DEC	R5	1					1
1E	DEC	R6	1					1
1F	DEC	R7	1					1
20	JB	bit, rel	3					2
21	AJMP	addr11	2					2
22	RET		1					2
23	RL	A	1					1
24	ADD	A, #const8	2	CY	AC	OV	P	1
25	ADD	A, direct	2	CY	AC	OV	P	1
26	ADD	A, @R0	1	CY	AC	OV	P	1
27	ADD	A, @R1	1	CY	AC	OV	P	1
28	ADD	A, R0	1	CY	AC	OV	P	1
29	ADD	A, R1	1	CY	AC	OV	P	1
2A	ADD	A, R2	1	CY	AC	OV	P	1
2B	ADD	A, R3	1	CY	AC	OV	P	1
2C	ADD	A, R4	1	CY	AC	OV	P	1
2D	ADD	A, R5	1	CY	AC	OV	P	1
2E	ADD	A, R6	1	CY	AC	OV	P	1
2F	ADD	A, R7	1	CY	AC	OV	P	1
30	JNB	bit, rel	3					2
31	ACALL	addr11	2					2
32	RETI		1					2
33	RLC	A	1	CY			P	1
34	ADDC	A, #const8	2	CY	AC	OV	P	1
35	ADDC	A, direct	2	CY	AC	OV	P	1
36	ADDC	A, @R0	1	CY	AC	OV	P	1
37	ADDC	A, @R1	1	CY	AC	OV	P	1
38	ADDC	A, R0	1	CY	AC	OV	P	1
39	ADDC	A, R1	1	CY	AC	OV	P	1
3A	ADDC	A, R2	1	CY	AC	OV	P	1
3B	ADDC	A, R3	1	CY	AC	OV	P	1
3C	ADDC	A, R4	1	CY	AC	OV	P	1
3D	ADDC	A, R5	1	CY	AC	OV	P	1
3E	ADDC	A, R6	1	CY	AC	OV	P	1
3F	ADDC	A, R7	1	CY	AC	OV	P	1
40	JC	rel	2					2
41	AJMP	addr11	2					2
42	ORL	direct, A	2					1
43	ORL	direct, #const8	3					2
44	ORL	A, #const8	2				P	1
45	ORL	A, direct	2				P	1
46	ORL	A, @R0	1				P	1
47	ORL	A, @R1	1				P	1
48	ORL	A, R0	1				P	1
49	ORL	A, R1	1				P	1
4A	ORL	A, R2	1				P	1
4B	ORL	A, R3	1				P	1
4C	ORL	A, R4	1				P	1
4D	ORL	A, R5	1				P	1
4E	ORL	A, R6	1				P	1
4F	ORL	A, R7	1				P	1
50	JNC	rel	2					2
51	ACALL	addr11	2					2
52	ANL	direct, A	2					1
53	ANL	direct, #const8	3					2
54	ANL	A, #const8	2				P	1
55	ANL	A, direct	2				P	1
56	ANL	A, @R0	1				P	1
57	ANL	A, @R1	1				P	1
58	ANL	A, R0	1				P	1
59	ANL	A, R1	1				P	1
5A	ANL	A, R2	1				P	1
5B	ANL	A, R3	1				P	1
5C	ANL	A, R4	1				P	1
5D	ANL	A, R5	1				P	1
5E	ANL	A, R6	1				P	1
5F	ANL	A, R7	1				P	1
60	JZ	rel	2					2
61	AJMP	addr11	2					2
62	XRL	direct, A	2					1
63	XRL	direct, #const8	3					2
64	XRL	A, #const8	2				P	1
65	XRL	A, direct	2				P	1
66	XRL	A, @R0	1				P	1
67	XRL	A, @R1	1				P	1
68	XRL	A, R0	1				P	1
69	XRL	A, R1	1				P	1
6A	XRL	A, R2	1				P	1
6B	XRL	A, R3	1				P	1
6C	XRL	A, R4	1				P	1
6D	XRL	A, R5	1				P	1
6E	XRL	A, R6	1				P	1
6F	XRL	A, R7	1				P	1
70	JNZ	rel	2					2
71	ACALL	addr11	2					2
72	ORL	C, bit	2	CY				2
73	JMP	@A+DPTR	1					2
74	MOV	A, #const8	2				P	1
75	MOV	direct, #const8	3					2
76	MOV	@R0, #const8	2					1
77	MOV	@R1, #const8	2					1
78	MOV	R0, #const8	2					1
79	MOV	R1, #const8	2					1
7A	MOV	R2, #const8	2					1
7B	MOV	R3, #const8	2					1
7C	MOV	R4, #const8	2					1
7D	MOV	R5, #const8	2					1
7E	MOV	R6, #const8	2					1
7F	MOV	R7, #const8	2					1
80	SJMP	rel	2					2
81	AJMP	addr11	2					2
82	ANL	C, bit	2	CY				2
83	MOVC	A, @A+PC	1				P	2
84	DIV	AB	1	CY		OV	P	4
85	MOV	direct, direct	3					2
86	MOV	direct, @R0	2					2
87	MOV	direct, @R1	2					2
88	MOV	direct, R0	2					2
89	MOV	direct, R1	2					2
8A	MOV	direct, R2	2					2
8B	MOV	direct, R3	2					2
8C	MOV	direct, R4	2					2
8D	MOV	direct, R5	2					2
8E	MOV	direct, R6	2					2
8F	MOV	direct, R7	2					2
90	MOV	DPTR, #const16	3					2
91	ACALL	addr11	2					2
92	MOV	bit, C	2					2
93	MOVC	A, @A+DPTR	1				P	2
94	SUBB	A, #const8	2	CY	AC	OV	P	1
95	SUBB	A, direct	2	CY	AC	OV	P	1
96	SUBB	A, @R0	1	CY	AC	OV	P	1
97	SUBB	A, @R1	1	CY	AC	OV	P	1
98	SUBB	A, R0	1	CY	AC	OV	P	1
99	SUBB	A, R1	1	CY	AC	OV	P	1
9A	SUBB	A, R2	1	CY	AC	OV	P	1
9B	SUBB	A, R3	1	CY	AC	OV	P	1
9C	SUBB	A, R4	1	CY	AC	OV	P	1
9D	SUBB	A, R5	1	CY	AC	OV	P	1
9E	SUBB	A, R6	1	CY	AC	OV	P	1
9F	SUBB	A, R7	1	CY	AC	OV	P	1
A0	ORL	C, /bit	2	CY				2
A1	AJMP	addr11	2					2
A2	MOV	C, bit	2	CY				1
A3	INC	DPTR	1					2
A4	MUL	AB	1	CY		OV	P	4
A5	illegal opcode
A6	MOV	@R0, direct	2					2
A7	MOV	@R1, direct	2					2
A8	MOV	R0, direct	2					2
A9	MOV	R1, direct	2					2
AA	MOV	R2, direct	2					2
AB	MOV	R3, direct	2					2
AC	MOV	R4, direct	2					2
AD	MOV	R5, direct	2					2
AE	MOV	R6, direct	2					2
AF	MOV	R7, direct	2					2
B0	ANL	C, /bit	2	CY				2
B1	ACALL	addr11	2					2
B2	CPL	bit	2					1
B3	CPL	C	1	CY				1
B4	CJNE	A, #const8, rel	3	CY				2
B5	CJNE	A, direct, rel	3	CY				2
B6	CJNE	@R0, #const8, rel	3	CY				2
B7	CJNE	@R1, #const8, rel	3	CY				2
B8	CJNE	R0, #const8, rel	3	CY				2
B9	CJNE	R1, #const8, rel	3	CY				2
BA	CJNE	R2, #const8, rel	3	CY				2
BB	CJNE	R3, #const8, rel	3	CY				2
BC	CJNE	R4, #const8, rel	3	CY				2
BD	CJNE	R5, #const8, rel	3	CY				2
BE	CJNE	R6, #const8, rel	3	CY				2
BF	CJNE	R7, #const8, rel	3	CY				2
C0	PUSH	direct	2					2
C1	AJMP	addr11	2					2
C2	CLR	bit	2					1
C3	CLR	C	1	CY				1
C4	SWAP	A	1					1
C5	XCH	A, direct	2				P	1
C6	XCH	A, @R0	1				P	1
C7	XCH	A, @R1	1				P	1
C8	XCH	A, R0	1				P	1
C9	XCH	A, R1	1				P	1
CA	XCH	A, R2	1				P	1
CB	XCH	A, R3	1				P	1
CC	XCH	A, R4	1				P	1
CD	XCH	A, R5	1				P	1
CE	XCH	A, R6	1				P	1
CF	XCH	A, R7	1				P	1
D0	POP	direct	2					2
D1	ACALL	addr11	2					2
D2	SETB	bit	2					1
D3	SETB	C	1	CY				1
D4	DA	A	1	CY			P	1
D5	DJNZ	direct, rel	3					2
D6	XCHD	A, @R0	1				P	1
D7	XCHD	A, @R1	1				P	1
D8	DJNZ	R0, rel	2					2
D9	DJNZ	R1, rel	2					2
DA	DJNZ	R2, rel	2					2
DB	DJNZ	R3, rel	2					2
DC	DJNZ	R4, rel	2					2
DD	DJNZ	R5, rel	2					2
DE	DJNZ	R6, rel	2					2
DF	DJNZ	R7, rel	2					2
E0	MOVX	A, @DPTR	1				P	2
E1	AJMP	addr11	2					2
E2	MOVX	A, @R0	1				P	2
E3	MOVX	A, @R1	1				P	2
E4	CLR	A	1				P	1
E5	MOV	A, direct	2				P	1
E6	MOV	A, @R0	1				P	1
E7	MOV	A, @R1	1				P	1
E8	MOV	A, R0	1				P	1
E9	MOV	A, R1	1				P	1
EA	MOV	A, R2	1				P	1
EB	MOV	A, R3	1				P	1
EC	MOV	A, R4	1				P	1
ED	MOV	A, R5	1				P	1
EE	MOV	A, R6	1				P	1
EF	MOV	A, R7	1				P	1
F0	MOVX	@DPTR, A	1					2
F1	ACALL	addr11	2					2
F2	MOVX	@R0, A	1					2
F3	MOVX	@R1, A	1					2
F4	CPL	A	1				P	1
F5	MOV	direct, A	2					1
F6	MOV	@R0, A	1					1
F7	MOV	@R1, A	1					1
F8	MOV	R0, A	1					1
F9	MOV	R1, A	1					1
FA	MOV	R2, A	1					1
FB	MOV	R3, A	1					1
FC	MOV	R4, A	1					1
FD	MOV	R5, A	1					1
FE	MOV	R6, A	1					1
FF	MOV	R7, A	1					1