TABLE OF CONTENTS

CHAPTER 1

 

 

 

Page

SYSTEM OVERVIEW

 

 

 

 

1.1 MICROPROCESSOR

 

......................................................................................................

1-1

1.2 COPROCESSORS

 

'"

1-4

1.3 INTEGRATED SYSTEM PERIPHERAL

1-4

1.4 CACHE CONTROLLER

:

1-5

1.5 EISA CHIP SET

 

 

1-6

1.6 MCA CHIP SET

 

 

1-6

1.7 LAN COPROCESSOR

1-7

1.8 CLOCK GENERATOR

1-7

1.9 8086/80286 FAMILY COMPONENTS .....•

1-7

1.10 INTEL PROGRAMMABLE LOGIC DEVICES

:

1-8

CHAPTER 2

 

 

 

 

INTERNAL ARCHITECTURE

 

 

2.1 BUS INTERFACE UNIT

2-2

2.2 CODE PREFETCH UNIT

....... ..... ......•

2-2

2.3 INSTRUCTION DECODE UNIT

2-2

2.4 EXECUTION UNIT

 

2-4

2.5 SEGMENTATION UNIT

;

2-4

2.6 PAGING UNIT

 

 

•. 2-4

CHAPTER 3

 

 

 

 

LOCAL BUS INTERFACE

 

 

3.1 BUS OPERATIONS

 

 

3-2

3.1.1

Bus States

..... .... ...... .... ..... .... ..... ......... ..... ... ........ ........ ..... ......... ...... ... .......

3-3

3.1.2 Address Pipelining

.......................................................................................................

 

3-6

3.1.3 32-Bit Data Bus Transfers and Operand Alignment

..:

3-6

3.1.4 Read Cycle

..... .......... ......... ....... ..... ..... .... ..... ..... ... .... .............. .... .... ... .... ... .......

3-11

3.1.5 Write Cycle

 

:

3-13

3.1.6

Pipelined Address Cycle

3-13

3.1.7

Interrupt Acknowledge Cycle

:

3-16

3.1.8

Halt/Shutdown Cycle

:....

3-17

3.1.9

BS16 Cycle

 

 

3-18

3.1 .10 16-Bit Byte Enables and Operand Alignment

3-19

3.2 BUS TIMING

~

....................,

3-23

3.2.1

Read Cycle Timing

 

...,...............,

3-23

3.2.2

Write Cycle Timing

....... .... .... ........ ..... ....... ..... ..... .... ..... .... ..... ................................ ......

3-23

3.2.3 READY# Signal Timing

3-24

3.3 CLOCK GENERATION

3-25

3.3.1

Clock Timing

,

3-25

3.3.2

Crystal Oscillator Clock Generator

3-26

3.4 INTERRUPTS

:

3-27

3.4.1

Non-Maskable Interrupt (NMI)

3-28

3.4.2

Maskable Interrupt (INTR)

3-29

3.4.3

Interrupt Latency

 

:

3-29

3.5 BUS LOCK

 

;

3-30

3.5.1

Locked Cycle Activators

3-30

3.5.2 Locked Cycle Timing

3-31

. 3.5.3

LOCK# Signal Duration '"

3-32

3.6 HOLD/HLDA (Hold Acknowledge)

3-32

vii

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Intel 386 manual Table of Contents