8085 Reference

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8085 Instruction Actions by Functional Group

Data Transfer Group

Instruction		Mnemonic Meaning	Flags
			Zf	Cf	Pf	Sf
MOV	dreg, sreg	dreg<=sreg	.	.	.	.
MVI	reg, byte	reg<=byte	.	.	.	.
MVX	drp, srp	drp<=srp (pseudo for high & low MOVs)	.	.	.	.
LXI	rp, word	rp<=word	.	.	.	.
XCHG		HL<=DE while DE<=HL	.	.	.	.
LDA	addr	A<=b[addr]	.	.	.	.
STA	addr	b[addr]<=A	.	.	.	.
LDAX	B	A<=b[BC]	.	.	.	.
STAX	B	b[BC]<=A	.	.	.	.
LDAX	D	A<=b[DE]	.	.	.	.
STAX	D	b[DE]<=A	.	.	.	.
LHLD	addr	HL<=w[addr]	.	.	.	.
SHLD	addr	w[addr]<=HL	.	.	.	.
LHLI		HL<=w[DE]	.	.	.	.
SHLI		w[DE]<=HL	.	.	.	.

Arithmetic Group

Instruction		Mnemonic Meaning	Flags
			Zf	Cf	Pf	Sf
ADD	reg	A<=A+reg	x	x	x	x
ADI	byte	A<=A+byte	x	x	x	x
ADC	reg	A<=A+reg+Cf	x	x	x	x
ACI	byte	A<=A+byte+Cf	x	x	x	x
SUB	reg	A<=A-reg	x	x	x	x
SUI	byte	A<=A-byte	x	x	x	x
SBB	reg	A<=A-reg-Cf	x	x	x	x
SBI	byte	A<=A-byte-Cf	x	x	x	x
DAA		in A3..A0 and A7..A4: if >9 then +6, carry to next	x	x	x	x
INR	reg	reg<=reg+1	x	.	x	x
INX	rp	rp<=rp+1	.	.	.	.
DCR	reg	reg<=reg-1	x	.	x	x
DCX	rp	rp<=rp-1	.	.	.	.
DAD	rp	HL<=HL+rp	.	x	.	.
HLMBC		HL<=HL-BC	x	x	h	x
DEHL	byte	DE<=HL+byte	.	.	.	.
DESP	byte	DE<=SP+byte	.	.	.	.

Branch Group

Instruction		Mnemonic Meaning	Flags
			Zf	Cf	Pf	Sf
JMP	label	PC<=label	.	.	.	.
JZ	label	if Zf=1 then PC<=label	.	.	.	.
JNZ	label	if Zf=0 then PC<=label	.	.	.	.
JP	label	if Sf=0 then PC<=label	.	.	.	.
JM	label	if Sf=1 then PC<=label	.	.	.	.
JC	label	if Cf=1 then PC<=label	.	.	.	.
JNC	label	if Cf=0 then PC<=label	.	.	.	.
JTM	label	if TSf=1 then PC<=label	.	.	.	.
JTP	label	if TSf=0 then PC<=label	.	.	.	.
JPE	label	if Pf=1 then PC<=label	.	.	.	.
JPO	label	if Pf=0 then PC<=label	.	.	.	.
CALL	label	SP<=SP-2, w[SP]<=PC+3, PC<=label	.	.	.	.
CZ	label	if Zf=1 then SP<=SP-2, w[SP]<=PC+3, PC<=label	.	.	.	.
CNZ	label	if Zf=0 then SP<=SP-2, w[SP]<=PC+3, PC<=label	.	.	.	.
CP	label	if Sf=0 then SP<=SP-2, w[SP]<=PC+3, PC<=label	.	.	.	.
CM	label	if Sf=1 then SP<=SP-2, w[SP]<=PC+3, PC<=label	.	.	.	.
CC	label	if Cf=1 then SP<=SP-2, w[SP]<=PC+3, PC<=label	.	.	.	.
CNC	label	if Cf=0 then SP<=SP-2, w[SP]<=PC+3, PC<=label	.	.	.	.
CPE	label	if Pf=1 then SP<=SP-2, w[SP]<=PC+3, PC<=label	.	.	.	.
CPO	label	if Pf=0 then SP<=SP-2, w[SP]<=PC+3, PC<=label	.	.	.	.
RET		PC<=w[SP], SP<=SP+2	.	.	.	.
RZ		if Zf=1 then PC<=w[SP], SP<=SP+2	.	.	.	.
RNZ		if Zf=0 then PC<=w[SP], SP<=SP+2	.	.	.	.
RP		if Sf=0 then PC<=w[SP], SP<=SP+2	.	.	.	.
RM		if Sf=1 then PC<=w[SP], SP<=SP+2	.	.	.	.
RC		if Cf=1 then PC<=w[SP], SP<=SP+2	.	.	.	.
RNC		if Cf=0 then PC<=w[SP], SP<=SP+2	.	.	.	.
RPE		if Pf=1 then PC<=w[SP], SP<=SP+2	.	.	.	.
RPO		if Pf=0 then PC<=w[SP], SP<=SP+2	.	.	.	.
PCHL		PC<=HL	.	.	.	.
RST	n	SP<=SP-2, w[SP]<=PC+1, PC<=n*8 where n is 0 to 7	.	.	.	.
RSTV		if OVf=1 then SP<=SP-2, w[SP]<=PC+1, PC<=8*8	.	.	.	.

Logical Group

Instruction		Mnemonic Meaning	Flags
			Zf	Cf	Pf	Sf
CMP	reg	T<=A-reg	x	x	x	x
CPI	byte	T<=A-byte	x	x	x	x
CMA		A<=1's complement of A	.	.	.	.
CMC		Cf<=1's complement of Cf	.	x	.	.
STC		Cf<=1	.	1	.	.
SHLR		HL<=HL/2 while H6<=H7 (extend sign) and Cf<=L0	.	x	.	.
ANA	reg	A<=A AND reg	x	0	x	x
ANI	byte	A<=A AND byte	x	0	x	x
ORA	reg	A<=A Inclusive OR reg	x	0	x	x
ORI	byte	A<=A Inclusive OR byte	x	0	x	x
XRA	reg	A<=A Exclusive OR reg	x	0	x	x
XRI	byte	A<=A Exclusive OR byte	x	0	x	x
RAL		A<=A*2 where Cf<=A7 while A0<=Cf	.	x	.	.
RAR		A<=A/2 where Cf<=A0 while A7<=Cf	.	x	.	.
RLC		A7..A1<=A6..A0 while A0<=A7 and Cf<=A7	.	x	.	.
RRC		A6..A0<=A7..A1 while A7<=A0 and Cf<=A0	.	x	.	.
RDEL		DE<=DE*2 where: Cf<=DE15 while DE00<=Cf	.	x	.	.

Stack, Input/Output, & Machine Control Group

Instruction		Mnemonic Meaning	Flags
			Zf	Cf	Pf	Sf
PUSH	rp	SP<=SP-2, w[SP]<=rp	.	.	.	.
POP	rp	rp<=w[SP], SP<=SP+2	.	.	.	.
SPHL		SP<=HL	.	.	.	.
XTHL		HL<=w[SP] while w[SP]<=HL	.	.	.	.
IN	port	A<=data from port	.	.	.	.
OUT	port	data to port<=A	.	.	.	.
DI		disable interrupts	.	.	.	.
EI		enable interrupts	.	.	.	.
RIM		A<=interrupt mask	.	.	.	.
SIM		interrupt mask<=A	.	.	.	.
NOP		do nothing	.	.	.	.
HLT		halt 8085 processor	.	.	.	.

8085 Instructions by Mnemonic

Instruction		Mnemonic Meaning	Flags
			Zf	Cf	Pf	Sf
ACI	byte	Add with Carry Immediate	x	x	x	x
ADC	reg	ADd with Carry	x	x	x	x
ADD	reg	ADD	x	x	x	x
ADI	byte	ADd Immediate	x	x	x	x
ANA	reg	ANd Accumulator	x	0	x	x
ANI	byte	ANd Immediate	x	0	x	x
CALL	label	CALL unconditional	.	.	.	.
CC	label	Call if Carry	.	.	.	.
CM	label	Call if Minus	.	.	.	.
CMA		CoMplement Accumulator	.	.	.	.
CMC		CoMplement Carry	.	x	.	.
CMP	reg	CoMPare	x	x	x	x
CNC	label	Call if No Carry	.	.	.	.
CNZ	label	Call if No Zero	.	.	.	.
CP	label	Call if Positive	.	.	.	.
CPE	label	Call if Parity Even	.	.	.	.
CPI	byte	ComPare Immediate	x	x	x	x
CPO	label	Call if Parity Odd	.	.	.	.
CZ	label	Call if Zero	.	.	.	.
DAA		Decimal Adjust Accumulator	x	x	x	x
DAD	rp	Dual-register ADd to hl	.	x	.	.
DCR	reg	DeCrement Register	x	.	x	x
DCX	rp	DeCrement eXtended-register	.	.	.	.
DEHL	byte	DE from HL plus byte	.	.	.	.
DESP	byte	DE from SP plus byte	.	.	.	.
DI		Disable Interrupts	.	.	.	.
EI		Enable Interrupts	.	.	.	.
HLMBC		HL Minus BC	x	x	h	x
HLT		HaLT	.	.	.	.
IN	port	INput from port	.	.	.	.
INR	reg	INcrement Register	x	.	x	x
INX	rp	INcrement eXtended-register	.	.	.	.
JC	label	Jump if Carry	.	.	.	.
JM	label	Jump if Minus	.	.	.	.
JMP	label	JuMP unconditional	.	.	.	.
JNC	label	Jump if No Carry	.	.	.	.
JNZ	label	Jump if No Zero	.	.	.	.
JP	label	Jump if Positive	.	.	.	.
JPE	label	Jump if Parity Even	.	.	.	.
JPO	label	Jump if Parity Odd	.	.	.	.
JTM	label	Jump if True sign Minus	.	.	.	.
JTP	label	Jump if True sign Positive	.	.	.	.
JZ	label	Jump if Zero	.	.	.	.
LDA	addr	LoaD Accumulator direct	.	.	.	.
LDAX	B	LoaD Accumulator indirect via eXtended-register Bc	.	.	.	.
LDAX	D	LoaD Accumulator indirect via eXtended-register De	.	.	.	.
LHLD	addr	Load HL Direct	.	.	.	.
LHLI		Load HL Indirect via extended register de	.	.	.	.
LXI	rp, word	Load eXtended-register Immediate	.	.	.	.
MOV	dreg, sreg	MOVe
MVI	reg, byte	MoVe Immediate	.	.	.	.
MVX	drp, srp	MoVe eXtended-register (pseudo for high & low MOVs)	.	.	.	.
NOP		No OPeration	.	.	.	.
ORA	reg	OR Accumulator	x	0	x	x
ORI	byte	OR Immediate	x	0	x	x
OUT	port	OUTput to port	.	.	.	.
PCHL		Program Counter from HL	.	.	.	.
POP	rp	POP off stack	.	.	.	.
PUSH	rp	PUSH on stack	.	.	.	.
RAL		Rotate Accumulator Left through carry	.	x	.	.
RAR		Rotate Accumulator Right through carry	.	x	.	.
RC		Return if Carry	.	.	.	.
RDEL		Rotate DE Left through carry	.	x	.	.
RET		RETurn unconditional	.	.	.	.
RIM		Read Interrupt Mask	.	.	.	.
RLC		Rotate accumulator Left Circular	.	x	.	.
RM		Return if Minus	.	.	.	.
RNC		Return if No Carry	.	.	.	.
RNZ		Return if No Zero	.	.	.	.
RP		Return if Positive	.	.	.	.
RPE		Return if Parity Even	.	.	.	.
RPO		Return if Parity Odd	.	.	.	.
RRC		Rotate accumulator Right Circular	.	x	.	.
RST	n	ReSTart	.	.	.	.
RSTV		ReSTart if oVerflow	.	.	.	.
RZ		Return if Zero	.	.	.	.
SBB	reg	SuBtract with Borrow	x	x	x	x
SBI	byte	Subtract with Borrow Immediate	x	x	x	x
SHLD	addr	Store HL Direct	.	.	.	.
SHLI		Store HL Indirect via extended register de	.	.	.	.
SHLR		Shift HL Right	.	x	.	.
SIM		Set Interrupt Mask	.	.	.	.
SPHL		Stack Pointer from HL	.	.	.	.
STA	addr	STore Accumulator direct	.	.	.	.
STAX	B	Store Accumulator indirect via eXtended-register Bc	.	.	.	.
STAX	D	Store Accumulator indirect via eXtended-register De	.	.	.	.
STC		SeT Carry	.	1	.	.
SUB	reg	SUBtract	x	x	x	x
SUI	byte	SUbtract Immediate	x	x	x	x
XCHG		eXCHanGe hl with de	.	.	.	.
XRA	reg	eXclusive oR Accumulator	x	0	x	x
XRI	byte	eXclusive oR Immediate	x	0	x	x
XTHL		eXchange Top of stack with HL	.	.	.	.

8085 Machine Cycles by Functional Group

Data Transfer Group

		Essential Cycles +register M involved or condition Met	EC +MM
Instruction		Mnemonic Meaning	Cycles
MOV	dreg, sreg	MOVe	04 +03
MVI	reg, byte	MoVe Immediate	07 +03
MVX	drp, srp	MoVe eXtended-register (pseudo for high & low MOVs)	--
LXI	rp, word	Load eXtended-register Immediate	10
XCHG		eXCHanGe hl with de	04
LDA	addr	LoaD Accumulator direct	13
STA	addr	STore Accumulator direct	13
LDAX	B	LoaD Accumulator indirect via eXtended-register Bc	07
STAX	B	Store Accumulator indirect via eXtended-register Bc	07
LDAX	D	LoaD Accumulator indirect via eXtended-register De	07
STAX	D	Store Accumulator indirect via eXtended-register De	07
LHLD	addr	Load HL Direct	16
SHLD	addr	Store HL Direct	16
LHLI		Load HL Indirect via extended register de	10
SHLI		Store HL Indirect via extended register de	10

Arithmetic Group

		Essential Cycles +register M involved or condition Met	EC +MM
Instruction		Mnemonic Meaning	Cycles
ADD	reg	ADD	04 +03
ADI	byte	ADd Immediate	07
ADC	reg	ADd with Carry	04 +03
ACI	byte	Add with Carry Immediate	07
SUB	reg	SUBtract	04 +03
SUI	byte	SUbtract Immediate	07
SBB	reg	SuBtract with Borrow	04 +03
SBI	byte	Subtract with Borrow Immediate	07
DAA		Decimal Adjust Accumulator	04
INR	reg	INcrement Register	04 +06
INX	rp	INcrement eXtended-register	06
DCR	reg	DeCrement Register	04 +06
DCX	rp	DeCrement eXtended-register	06
DAD	rp	Dual-register ADd to hl	10
HLMBC		HL Minus BC	10
DEHL	byte	DE from HL plus byte	10
DESP	byte	DE from SP plus byte	10

Logical Group

		Essential Cycles +register M involved or condition Met	EC +MM
Instruction		Mnemonic Meaning	Cycles
CMP	reg	CoMPare	04 +03
CPI	byte	ComPare Immediate	07
CMA		CoMplement Accumulator	04
CMC		CoMplement Carry	04
STC		SeT Carry	04
SHLR		Shift HL Right	07
ANA	reg	ANd Accumulator	04 +03
ANI	byte	ANd Immediate	07
ORA	reg	OR Accumulator	04 +03
ORI	byte	OR Immediate	07
XRA	reg	eXclusive oR Accumulator	04 +03
XRI	byte	eXclusive oR Immediate	07
RAL		Rotate Accumulator Left through carry	04
RAR		Rotate Accumulator Right through carry	04
RLC		Rotate accumulator Left Circular	04
RRC		Rotate accumulator Right Circular	04
RDEL		Rotate DE Left through carry	10

Stack, Input/Output, & Machine Control Group

		Essential Cycles +register M involved or condition Met	EC +MM
Instruction		Mnemonic Meaning	Cycles
PUSH	rp	PUSH on stack	12
POP	rp	POP off stack	10
SPHL		Stack Pointer from HL	06
XTHL		eXchange Top of stack with HL	16
IN	port	INput from port	10
OUT	port	OUTput to port	10
DI		Disable Interrupts	04
EI		Enable Interrupts	04
RIM		Read Interrupt Mask	04
SIM		Set Interrupt Mask	04
NOP		No OPeration	04
HLT		HaLT	05

Branch Group

		Essential Cycles +register M involved or condition Met	EC +MM
Instruction		Mnemonic Meaning	Cycles
JMP	label	JuMP unconditional	10
JZ	label	Jump if Zero	07 +03
JNZ	label	Jump if No Zero	07 +03
JP	label	Jump if Positive	07 +03
JM	label	Jump if Minus	07 +03
JC	label	Jump if Carry	07 +03
JNC	label	Jump if No Carry	07 +03
JTM	label	Jump if True sign Minus	07 +03
JTP	label	Jump if True sign Positive	07 +03
JPE	label	Jump if Parity Even	07 +03
JPO	label	Jump if Parity Odd	07 +03
CALL	label	CALL unconditional	18
CZ	label	Call if Zero	09 +09
CNZ	label	Call if No Zero	09 +09
CP	label	Call if Positive	09 +09
CM	label	Call if Minus	09 +09
CC	label	Call if Carry	09 +09
CNC	label	Call if No Carry	09 +09
CPE	label	Call if Parity Even	09 +09
CPO	label	Call if Parity Odd	09 +09
RET		RETurn unconditional	10
RZ		Return if Zero	06 +06
RNZ		Return if No Zero	06 +06
RP		Return if Positive	06 +06
RM		Return if Minus	06 +06
RC		Return if Carry	06 +06
RNC		Return if No Carry	06 +06
RPE		Return if Parity Even	06 +06
RPO		Return if Parity Odd	06 +06
PCHL		Program Counter from HL	06
RST	n	ReSTart	12
RSTV		ReSTart if oVerflow	06 +06

8085 Instruction Mnemonics by Op-code

x0h

x1h

x2h

x3h

x4h

x5h

x6h

x7h

x8h

x9h

xAh

xBh

xCh

xDh

xEh

xFh

00h-0Fh

NOP

LXI B,w

STAX B

INX B

INR B

DCR B

MVI B,b

RLC

HLMBC

DAD B

LDAX B

DCX B

INR C

DCR C

MVI C,b

RRC

10h-1Fh

SHLR

LXI D,w

STAX D

INX D

INR D

DCR D

MVI D,b

RAL

RDEL

DAD D

LDAX D

DCX D

INR E

DCR E

MVI E,b

RAR

20h-2Fh

RIM

LXI H,w

SHLD @

INX H

INR H

DCR H

MVI H,b

DAA

DEHL b

DAD H

LHLD @

DCX H

INR L

DCR L

MVI L,b

CMA

30h-3Fh

SIM

LXI SP,w

STA @

INX SP

INR M

DCR M

MVI M,b

STC

DESP b

DAD SP

LDA @

DCX SP

INR A

DCR A

MVI A,b

CMC

40h-4Fh

MOV B,B

MOV B,C

MOV B,D

MOV B,E

MOV B,H

MOV B,L

MOV B,M

MOV B,A

MOV C,B

MOV C,C

MOV C,D

MOV C,E

MOV C,H

MOV C,L

MOV C,M

MOV C,A

50h-5Fh

MOV D,B

MOV D,C

MOV D,D

MOV D,E

MOV D,H

MOV D,L

MOV D,M

MOV D,A

MOV E,B

MOV E,C

MOV E,D

MOV E,E

MOV E,H

MOV E,L

MOV E,M

MOV E,A

60h-6Fh

MOV H,B

MOV H,C

MOV H,D

MOV H,E

MOV H,H

MOV H,L

MOV H,M

MOV H,A

MOV L,B

MOV L,C

MOV L,D

MOV L,E

MOV L,H

MOV L,L

MOV L,M

MOV L,A

70h-7Fh

MOV M,B

MOV M,C

MOV M,D

MOV M,E

MOV M,H

MOV M,L

HLT

MOV M,A

MOV A,B

MOV A,C

MOV A,D

MOV A,E

MOV A,H

MOV A,L

MOV A,M

MOV A,A

80h-8Fh

ADD B

ADD C

ADD D

ADD E

ADD H

ADD L

ADD M

ADD A

ADC B

ADC C

ADC D

ADC E

ADC H

ADC L

ADC M

ADC A

90h-9Fh

SUB B

SUB C

SUB D

SUB E

SUB H

SUB L

SUB M

SUB A

SBB B

SBB C

SBB D

SBB E

SBB H

SBB L

SBB M

SBB A

A0h-AFh

ANA B

ANA C

ANA D

ANA E

ANA H

ANA L

ANA M

ANA A

XRA B

XRA C

XRA D

XRA E

XRA H

XRA L

XRA M

XRA A

B0h-BFh

ORA B

ORA C

ORA D

ORA E

ORA H

ORA L

ORA M

ORA A

CMP B

CMP C

CMP D

CMP E

CMP H

CMP L

CMP M

CMP A

COh-CFh

RNZ

POP B

JNZ @

JMP @

CNZ @

PUSH B

ADI b

RST 0

RZ

RET

JZ @

RSTV

CZ @

CALL @

ACI b

RST 1

D0h-DFh

RNC

POP D

JNC @

OUT port

CNC @

PUSH D

SUI b

RST 2

RC

SHLI

JC @

IN port

CC @

JTP @

SBI b

RST 3

E0h-EFh

RPO

POP H

JPO @

XTHL

CPO @

PUSH H

ANI b

RST 4

RPE

PCHL

JPE @

XCHG

CPE @

LHLI

XRI b

RST 5

F0h-FFh

RP

POP PSW

JP @

DI

CP @

PUSH PSW

ORI b

RST 6

RM

SPHL

JM @

EI

CM @

JTM @

CPI b

RST 7