SOSSA

8085A CPU INSTRUCTIONS IN OPERATION CODE SEQUENCE

Table 5·2

OP

 

 

 

OP

 

 

OP

 

 

OP

 

 

OP

 

 

OP

 

 

CODE

MNEMONIC

CODE

MNEMONIC

CODE

MNEMONIC

CODE

MNEMONIC

CODE

MNEMONIC

CODE

MNEMONIC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

00

 

NOP

 

2B

DCX

H

56

MOV

D,M

81

ADD

C

AC

XRA

H

D7

RST

2

01

 

LXI

B,D16

2C

INR

L

57

MOV

D,A

82

ADD

D

AD

XRA

L

D8

RC

 

02

 

STAX

B

2D

DCR

L

58

MOV

E,B

83

ADD

E

AE

XRA

M

D9

-

Adr

03

 

INX

B

2E

MVI

L,D8

59

MOV

E,C

84

ADD

H

AF

XRA

A

DA

JC

04

 

INR

B

2F

CMA

 

5A

MOV

E,D

85

ADD

L

80

ORA

B

DB

IN

D8

05

 

DCR

B

30

SIM

 

5B

MOV

E,E

86

ADD

M

B1

ORA

C

DC

CC

Adr

06

 

MVI

B,D8

31

LXI

SP,D16

5C

MOV

E,H

87

ADD

A

B2

ORA

D

DD

-

 

07

 

RLC

 

32

STA

Adr

5D

MOV

E,L

88

ADC

B

B3

ORA

E

DE

SBI

D8

08

 

-

 

33

INX

SP

5E

MOV

E,M

89

ADC

C

B4

ORA

H

DF

RST

3

09

 

DAD

B

34

INR

M

5F

MOV

E,A

8A

ADC

D

B5

ORA

L

EO

RPO

 

OA

 

LDAX

B

35

DCR

M

60

MOV

H,B

8B

ADC

E

B6

ORA

M

E1

POP

H

OB

 

DCX

B

36

MVI

M,D8

61

MOV

H,C

8C

ADC

H

B7

ORA

A

E2

JPO

Adr

OC

 

INR

C

37

STC

 

62

MOV

H,D

8D

ADC

L

B8

CMP

B

E3

XTHL

 

OD

 

DCR

C

38

-

 

63

MOV

H,E

8E

ADC

M

B9

CMP

C

E4

CPO

Adr

OE

 

MVI

C,D8

39

DAD

SP

64

MOV

H,H

8F

ADC

A

BA

CMP

D

E5

PUSH

H

OF

 

RRC

 

3A

LDA

Adr

65

MOV

H,L

90

SUB

B

BB

CMP

E

E6

ANI

D8

10

 

-

 

3B

DCX

SP

66

MOV

H,M

91

SUB

C

BC

CMP

H

E7

RST

4

11

 

LXI

D,D16

3C

INR

A

67

MOV

H,A

92

SUB

D

BD

CMP

L

E8

RPE

 

12

 

STAX

D

3D

DCR

A

68

MOV

L,B

93

SUB

E

BE

CMP

M

E9

PCHL

 

13

 

INX

D

3E

MVI

A,D8

69

MOV

L,C

94

SUB

H

BF

CMP

A

EA

JPE

Adr

14

 

INR

D

3F

CMC

 

6A

MOV

L,D

95

SUB

L

CO

RNZ

 

EB

XCHG

 

15

 

DCR

D

40

MOV

B,B

6B

MOV

L,E

96

SUB

M

C1

POP

B

EC

CPE

Adr

16

 

MVI

D,D8

41

MOV

B,C

6C

MOV

L,H

97

SUB

A

C2

JNZ

Adr

ED

-

 

17

 

RAL

 

42

MOV

B,D

6D

MOV

L,L

98

SBB

B

C3

JMP

Adr

EE

XRI

D8

18

 

-

 

43

MOV

B,E

6E

MOV

L,M

99

SBB

C

C4

CNZ

Adr

EF

RST

5

19

 

DAD

D

44

MOV

B,H

6F

MOV

L,A

9A

SBB

D

C5

PUSH

B

FO

RP

 

1A

 

LDAX

D

45

MOV

B,L

70

MOV

M,B

9B

SBB

E

C6

ADI

D8

F1

POP

PSW

1B

 

DCX

D

46

MOV

B,M

71

MOV

M,C

9C

SBB

H

C7

RST

0

F2

JP

Adr

1C

 

INR

E

47

MOV

B,A

72

MOV

M,D

9D

SBB

L

C8

RZ

 

F3

DI

 

1D

 

DCR

E

48

MOV

C,B

73

MOV

M,E

9E

SBB

M

C9

RET

Adr

F4

CP

Adr

1E

 

MVI

E,D8

49

MOV

C,C

74

MOV

M,H

9F

SBB

A

CA

JZ

 

F5

PUSH

PSW

1F

 

RAR

 

4A

MOV

C,D

75

MOV

M,L

AO

ANA

B

CB

-

 

F6

ORI

D8

20

 

RIM

 

4B

MOV

C,E

76

HLT

 

A1

ANA

C

CC

CZ

Adr

F7

RST

6

21

 

LXI

H,D16

4C

MOV

C,H

77

MOV

M,A

A2

ANA

D

CD

CALL

Adr

F8

RM

 

22

 

SHLD

Adr

4D

MOV

C,L

78

MOV

A,B

A3

ANA

E

CE

ACI

D8

F9

SPHL

 

23

 

INX

H

4E

MOV

C,M

79

MOV

A,C

A4

ANA

H

CF

RST

1

FA

JM

Adr

24

 

INR

H

4F

MOV

C,A

7A

MOV

A,D

A5

ANA

L

DO

RNC

 

FB

EI

Adr

25

 

DCR

H

50

MOV

D,B

7B

MOV

A,E

A6

ANA

M

D1

POP

D

FC

CM

26

 

MVI

H,D8

51

MOV

D,C

7C

MOV

A,H

A7

ANA

A

D2

JNC

Adr

FD

-

 

27

 

DAA

 

52

MOV

D,D

7D

MOV

A,L

A8

XRA

B

D3

OUT

D8

FE

CPI

D8

28

 

-

 

53

MOV

D,E

7E

MOV

A,M

A9

XRA

C

D4

CNC

Adr

FF

RST

7

29

 

DAD

H

54

MOV

D,H

7F

MOV

A,A

AA

XRA

D

D5

PUSH

D

 

 

 

2A

 

LHLD

Adr

55

MOV

D,L

80

ADD

B

AB

XRA

E

D6

SUI

D8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D8 = constant, or logical/arithmetic expression that evaluates

 

D16 = constant, or logical/arithmetic expression that evaluates

 

to an a-bit data quantity.

 

 

 

 

 

 

to a 16-bit data quantity.

 

 

 

 

Adr = 16-bit address.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• All mnemonics copyrighted C0lntel Corporation 1976.

II·

\

,I

\'1

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5-20

Page 104 Page 106
Page 105
Image 105
Intel MCS-80/85 manual Sossa
Page 104 Page 106

MCS-80/85 specifications

The Intel MCS-80/85 family, introduced in the late 1970s, is a seminal collection of microprocessors that played a pivotal role in the early days of computing. The MCS-80 series, initially targeting embedded systems and control applications, gained remarkable attention due to its innovative architecture and flexible programming capabilities.

The MCS-80 family is anchored by the 8080 microprocessor, which was one of the first fully integrated 8-bit microprocessors. Released in 1974, the 8080 operated at clock speeds ranging from 2 MHz to 3 MHz and featured a 16-bit address bus capable of addressing up to 64KB of memory. The processor’s instruction set included around 78 instructions, providing extensive capabilities for data manipulation, logic operations, and branching.

Complementing the 8080 was a suite of support chips, forming the MCS-80 platform. The most notable among them was the 8155, which integrated a static RAM, I/O ports, and a timer, tailored for ease of designing systems around the 8080. Other support chips included the 8085, which provided improvements with an integrated clock generator, making it compatible with more modern designs and applications.

The MCS-85 series, on the other hand, revolves around the 8085 microprocessor, which provided a more advanced architecture. The 8085 operated at clock speeds of up to 6 MHz and came with a 16-bit address bus, similar to its predecessor. However, it introduced more sophisticated features, including an enhanced instruction set and support for interrupt-driven programming. These enhancements made the 8085 especially appealing to developers working in real-time processing environments.

The MCS-80/85 family utilized NMOS technology, known for its lower power consumption and higher performance compared to previous technologies like TTL. The family’s architecture allowed for easy interfacing with a variety of peripherals, making it a favorite for educational institutions and hobbyists embarking on computer engineering projects.

With its robustness, versatility, and affordability, the Intel MCS-80/85 microprocessors laid the groundwork for many subsequent microcomputer systems and applications. The legacy of this powerful family continues to influence modern microprocessor design, emphasizing the importance of reliable architecture in a rapidly evolving technology landscape.
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