8086-2 datasheet(26/30 Pages) INTEL

26 / 30 page

8086

Table 2. Instruction Set Summary

Mnemonic and

Instruction Code

Description

DATA TRANSFER

MOV

e Move:

76543210

1 0 0 0 1 0 d w

mod

reg

r/m

Immediate to Register/Memory

1 1 0 0 0 1 1 w

mod 0 0 0 r/m

data

data if w

e 1

Immediate to Register

1 0 1 1 w reg

data

data if w

e 1

Memory to Accumulator

1010000w

addr-low

addr-high

Accumulator to Memory

1010001w

addr-low

addr-high

1 0 0 0 1 1 1 0

mod 0 reg r/m

Segment Register to Register/Memory

1 0 0 0 1 1 0 0

mod 0 reg r/m

PUSH

e Push:

1 1 1 1 1 1 1 1

mod 1 1 0 r/m

0 1 0 1 0 reg

Segment Register

0 0 0 reg 1 1 0

POP

e Pop:

1 0 0 0 1 1 1 1

mod 0 0 0 r/m

0 1 0 1 1 reg

Segment Register

0 0 0 reg 1 1 1

XCHG

e Exchange:

1 0 0 0 0 1 1 w

mod reg r/m

1 0 0 1 0 reg

e Input from:

Fixed Port

1110010w

port

Variable Port

1110110w

OUT

e Output to:

Fixed Port

1110011w

port

Variable Port

1110111w

XLAT

e Translate Byte to AL

11010111

LEA

e Load EA to Register

1 0 0 0 1 1 0 1

mod reg r/m

LDS

e Load Pointer to DS

1 1 0 0 0 1 0 1

mod reg r/m

LES

e Load Pointer to ES

1 1 0 0 0 1 0 0

mod reg r/m

LAHF

e Load AH with Flags

10011111

SAHF

e Store AH into Flags

10011110

PUSHF

e Push Flags

10011100

POPF

e Pop Flags

10011101

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