North Star Advantage Manuel utilisateur

·.·ADVANTAGE

Technical

Manual

00464C

TABLE

CONTENTS

Section

Page

INTRODUCTION

1-1

1.1

using

this

Manual

1-2

1.2

System

Description

1-3

1.3

Warranty

1-6

1.4

ADVANTAGE

Specifications

1-7

ADVANTAGE

OPERATION

2-1

2.1

Operating

Cont~ols

2-1

2.1.1

Keyboard

2-1

2.1.2

Rear

Panel

Controls

2-4

2.1.3

Diskette

Loading/Unloading

2-6

2.2

System

Startup

2-7'

2.2.1

Standard

Startup

Booting

From

Drive

2-7

2.2.2

Alternate

Startup

Booting

From

Drive

2-8

2.2.3

Alternate

Startup

Booting

From A

Serial

Port

2-8

2.2.4

Mini-Motor

Startup

2-8

2.3

Restarting

The

System

2-9

2.3.1

Keyboard

Reset

2-9

IMPLEMENTING

ADVANTAGE

FEATURES

3-1

3.1

Microprocessor

Control

3-1

3.2

Memory

Control

3-1

3.2.1

Memory Mapping

3-1

3.2.2

Memory

Parity

3-6

3.3

Inter'rupts

3-7

3.3.1

Maskable

Interrupts

3-8

3.3.2

Non-Maskab1e

Interrupts

3-8

3.4

Shared

I/O

Interface

Registers

3-9

ADVANTAGE

TECHNICAL

MANUAL

TABLE

CONTENTS

(continued)

Section

Page

3.5.

Keyboard

Control

3-16

3.5.1

Keyboard

Reset

Enable

3-16

3.5.2

Reset

3-17

3.5.3

Interrupt

Polled

3-17

3.5.4

Read

Keyboard

3-19

3.5.5

Character

Overrun

3-19

3.5.6

Cursor

Lock

3-12

3.5.7

All

Caps

3-21

3.5.8

Auto

Repeat

3-21

3.6

Video

Display

Control

3-22

3.6.1

Screen

Mapping

3-23

3.6.2

Forming

Letters

and

Symbols

3-25

3.6.3

Display

Flag

3-27

3.6.4

Screen

Blanking

3-27

3.6.5

Video

Driver

3-27

3.7

Floppy

Disk

Drive

Control

3-31

3.7.1

Power-on

Initialization

3-34

3.7.2

Motor

Enable

3-34

3.7.3

Drive

Selection

3-34

3.7.4

Seek

3-34

3.7.5

Sector

Selection

3-35

3.7.6

Read

Data

3-36

3.7.7

Write

Data

3-37

3.7.8

Floppy

Disk

Data

Format

3-39

3.8

Hard

Disk

Drive

Control

3-40

3.8.1

I/O

Commands

3-40

3.8.2

Head

Positioning

3-45

3.8.3

Data

Format

3-47

3.8.4

Format

Operation

3-48

3.8.5

Read

Operations

3-49

3.8.6

Write

Operation

3-50

3.9

Accessing

The

I/O

Boards

3-51

3.9.1

Reset

3-51

3.9.2

Board

Identification

3-51

3.9.3

Byte

Transfers

3-53

3.9.4

Interrupt

3-53

ADVANTAGE

TECHNICAL

MANUAL

TABLE

CONTENTS

(continued)

Section

3.10

SIO

Board

3.10.1

Reset

3.10.2

Board

Identification

3.10.3

Data

Transfers

3.10.4

Control

3.10.5

Status

3.10.6

Interrupt

Polled

3.10.7

SIO

Asynchronous

Mode

3.10.8

SIO

Synchronous

Mode

3.11

PIO

Board

3.11.1

Reset

3.11.2

Board

Identification

3.11.3

Data

Transfers

3.11.4

Control

3.11.5

Status

3.11.6

Interrupt

Polled

3.11.7

Programming

Example

3.12

Speaker

Control

3.13

Bootstrap

Firmware

3.13.1

Startup

3.13.2

Boot

From

Disk

Drive

3.12.3

Boot

From

Serial

Port

THEORY

OPERATION

4.1

Main

Board

4.1.1

4.1.2

4.1.3

4.1.4

4.1.5

4.1.6

4.1.7

4.1.8

4.1.9

Central

Processor

Main

RAM

Boot

PROM

Auxiliary

Processor

and

Keyboard

Floppy

Disk

Controller

Dislay

RAM

and

Video

Generator

I/O

Board

Interface

Speaker

Circuit

Voltage

Regulators

Page

3-54

3-55

3-57

3-58

3-66

3-72

3-73

3-74

3-75

3-77

3-78

3-79

3-82

4-1

4-4

4-15

4-18

4-22

4-25

4-36

4-41

4.2

Hard

Disk

Controller

Board

4-44

ADVANTAGE

iii

TECHNICAL

MANUAL

TABLE

CONTENTS

(continued)

Section

Page

ADVANTAGE

4.2.1

4.2.2

4.2.3

Track

and

Sector

Format

Hard

Disk

Controller

Hard

Disk

Drive

PREVENTIVE

MAINTENANCE

4-44

4-55

5-1

5.1

Wear

and

Damage

Inspection

5-2

5.2

Voltage

Checks

and

Adjustment

5-3

5.3

Voltage

Controlled

Oscillator

Check

and

Adjustment

5-4

DIAGNOSTICS

6.1

The

Mini-Monitor

6.2

The

General

Diagnostic

Programs

6.2.1

6.2.2

6.2.3

6.2.4

6.2.5

6.2.6

6.2.7

Single

Block

Mode

Floppy

Disk

Subsystem

Test

Executable

Memory

Test

Video

Memory

Test

SIO

Board

Test

Keyboard

Test

Display

Monitor

Test

6.3

Hard

Disk

Diagnostic

Procedures

TROUBLESHOOTING

AND

REPAIR

7.1

Tools

and

Test

Equipment

7.2

Troubleshooting

Procedures

7.2.1

Troubleshooting

Chart

7.3

Assembly

Replacement

Procedures

7.3.1

Opening

and

Closing

ADVANTAGE

6-1

6-2

6-4

6-6

6-8

6-11

6-12

6-13

6-22

6"';23

?,-l

7-1

7-2

7-15

Cabinet

7-16

7.3.2

Removing

and

Installing

The

Keyboard

7-20

7.3.3

Removing

and

Installing

The

Main

Board

7-24

7.3.4

Removing

and

Installing

Disk

Drive

7-27

TECHNICAL

MANUAL

ADVANTAGE

Aggendix

TABLE

CONTENTS

(continued)

CHARACTER

CODE

TABLES

IIO

ADDRESS

SUMMARY

BOARD

JUMPERS

ERROR

MESSAGES

PARTS

LISTS

FULL

ASSEMBLY

DRAWINGS

Z80

MICROPROCESSOR

DATA

SHEET

8251

USART

DATA

SHEET

SCHEMATICS

READER

RESPONSE

FORM

A-I

B-1

C-l

0-1

E-l

F-l

G-l

H-l

I-I

J-l

TECHNICAL

MANUAL

Figure

1-1

1-2

2-1

2-2

2-3

3-1

3-2

3-3

3-4

3-5

3-6

3-7

3-8

3-9

3-10

3-11

3-12

3-13

3-14

3-15

3-16

4-1

4-2

4-3

4-4

4-5

4-6

4-7

4-8

4-9

4-10

4-11

4-12

4-13

4-14

4-15

4-16

4-17

4-18

4-19

4-20

ADVANTAGE

ILLUSTRATIONS

The

ADVANTAGE

Computer

Functional

Block

Diagram

The

ADVANTAGE

Keyboard

ADVANTAGE

Rear

View

Diskette

Memory

Mapping

Registers

The

Three

Shared

I/O

Interface

Registers

Data

Format

Display

RAM

Disk

Read/Write

Timing

Floppy

Disk

Track

and

Sector

Format

Hard

Disk

Track

and

Sector

Format

Asynchronous

Modem'Configuration

Header

Asynchronous

Terminal

Configuration

Header

Current

Loop

Configuration

Header

Current

Loop

Circuit

Buffer

Full

Modification

Synchronous

Modem

Clock

Header

Synchronous

Modem

Configuration

Header

Synchronous

Terminal

Clock

Header

Synchronous

Terminal

Configuration

Header

Standard

PIO

Configuration

Header

The

ADVANTAGE

System

Block

Diagram

Central

Processor

Block

Diagram

Main

RAM

Block

Diagram

Main

RAM

Timing

Auxilliary

Processor

Block

Diagram

Disk

Controller

Block

Diagram

Display

RAM

and

Video

Driver

Horizontal

Scan

Timing

Vertical

Scan

Timing

I/O

Board

Interface

Block

Diagram

I/O

Board

Timing

Voltage

Regulators

Block

Diagram

Hard

Disk

Controller

Block

Diagram

SIO

Board

Block

Diagram

Connector

Assignments

(Asynchronous)

SIO

Connector

Assignments

(Synchronous)

PIO

Board

Block

Diagram

PIO

Connector

Assignments

Standard

PIO

Configuration

Header

PIO

Port

Timing

1-1

1-5

2-1

2-4

2-6

3-3

3-10

3-24

3-38

3-39

3-47

3-59

3-60

3-61

3-62

3-63

3-66

3-67

3-72

4-2

4-5

4-15

4-17

4-19

4-22

4-26

4-31

4-35

4-36

4-40

4-42

4-45

4-58

4-60

4-63

4-65

4-66

4-68

vii

TECHNICAL

MANUAL

Figure

6-1

6-2

6-3

6-4

6-5

6-6

6-7

6-8

6-9

6-10

7-1

7-2

7-3

7-4

7-5

7-6

7-7

7-8

7-9

7-10

7-11

7-12

7-13

7-14

7-15

7-16

7-17

7-18

7-19

7-20

7-21

7-22

ADVANTAGE

ILLUSTRATIONS

(continued)

Single

Block

Mode

Display

Format

Floppy

Disk

Subsystem

Test

Display

Format

Executable

Memory

Test

Display

Format

Locating

Defective

Main

RAM

Chip

Loacating

Defective

Video

RAM

Chip

SIO

Board

Test

Display

Format

Keyboard

Test

Modules and

Sections

N-Key

Rollover

Test

Keyboard

Test

Summary

Display

Format

for

Display

Monitor

Test

ADVANTAGE

Troubleshooting

Chart

Locations

the

Disk

Drive

Locations

the

Controller

Board

(Solder

Side)

Power

Cord

Removal

Bottom

View

the

ADVANTAGE

Cabinet

Separation

Sequence

Major

Components

Inside

the

ADVANTAGE

Base

Assembly

ADVANTAGE

HD-5

Base

Assembly

ADVANTAGE

Cable

Connections

ADVANTAGE

80-5

Cable

Connections

Main

Board

Removal

Disk

Drive

Shield

Removal

Disk

Drive

Cabling

Upper

Disk

Drive

Removed

Power

Supply

Components

Cover

Assembly

Fan

Cable

Removal/Installation

Video

Components

Video

Board

CRT

Removal

CRT

Installation

6-5

6-7

6-9

6-10

6-11

6-12

6-14

6-19

6-20

6-22

7-1

7-11

7-13

7-16

7-17

7-18

7-19

7-20

7-21

7-22

7-23

7-25

7-27

7-28

7-29

7-30

7-32

7-34

7-35

7-36

7-38

viii

TECHNICAL

MANUAL

Table

1-1

2-1

2-2

3-1

3-2

3-3

3-4

3-5

3-6

3-7

3-8

3-9

3-10

3-11

3-12

3-13

3-14

3-15

3-16

3-17

3-18

3-19

3-20

3-21

3-22

3-23

3-24

3-25

3-26

3-27

3-28

3-29

3-30

3-31

·3-22

3-33

4-1

4-2

4-3

4-4

4-5

4-6

4-7

ADVANTAGE

ILLUSTRATIONS

(continued)

ADVANTAGE

Specifications

ADVANTAGE

Keys

Rear

Panel.

Controls

256K

Address

Space

Allocation

Memory Mapping

I/O

Addresses

Memory Mapping

Configurations

Memory

Parity

I/O

Address

Memory

Parity

Status

and

Control

Bytes

Shared

Addresses

I/O

Control

Format

I/O

Commands

for

I/O

Control

I/O

Status

Format

I/O

Status

Format

Sample

Routine

for

Reading

Characters

Video

I/O

Addresses

Video

Driver

Control

Codes

Video

Driver

Data

Block

Format

Floppy

Disk

I/O

Addresses

Floppy

Drive

Control

Format

Hard

Disk

Drive

I/O

Commands

Hard

Disk

Drive

Control

Format

Hard

Disk

Controller/Drive

Status

Bits

I/O

Board

Addresses

I/O

Board

Identification

Codes

First

Digit

I/O

Addresses

SIO

Interrupt

Mask

Format

Serial

I/O

Addresses

Asynchronous

Baud

Rate

Selection

Sample

Asynchronous

I/O·

Routines

for

SID

Board

Synchronous

Baud

Rate

Selection

Sample

Synchronous

I/O

Routines

for

SIO

Board

PIO

Interrup

Mask

Format

PIO

Status

Byte

Format

Parallel

I/O

Addresses

Sample

Routine

for

Outputting

PIO

Data

Boot

PROM

CRC

Routine

I/O

Status

Format

I/O

Address

Decoder

Signals

I/O

Select

PROM

Summary

I/O

Control

Format

I/O

Commands

I/O

Status

Format

Floppy

Disk

I/O

Instructions

1-7

2-2

2-5

3-2

3-4

3-5

3-6

3-7

3-9

3-11

3-12

3-14

3-15

3-20

3-26

3-28

3-29

3-31

3-33

3-41

3-43

3-44

3-52

3-55

3-56

3-57

3-64

3-65

3-68

3-69

3-74

3-75

3-76

3-77

3-81

4-8

4-9

4-10

4-12

4-13

4-20

4-23

TECHNICAL

MANUAL

Figure

4-8

4-9

4-10

4-11

4-12

4-13

4-14

4-15

4-16

4-17

4-18

4-19

5-1

6-1

6-2

6-3

7-1

7-2

7-3

7-4

ADVANTAGE

ILLUSTRATIONS

(continued)

Floppy

Disk

Control

Format

HTIML

Horizontal

Scan

PROM

HTIMH

Horizontal

Scan

PROM

vertical

Timing

PROM

Vertical

Timing

PROM

1/0

Board

Assignments

Hard

Disk

Controller

Input/Output

Sign~ls

SIO

Board

I/O

Instructions

SIO

Board

1/0

Instructions

PIa

Board

1/0

Instructions

PIa

status

Byte

Format

PIa

Interrupt

Mask

Format

Preventive

Maintenance

Schedule

Mini-Monitor

Commands

Keyboard

Test

Abbreviation

Codes

Keyboard

Test

Control

Keys

Main

Board

Input

Power

(Jll)

Main

Board

Video

Interface

(J7)

Main

Board

Floppy

Disk

Power

(JI0)

Driver

Status

Signals

4-24

4-28

4-29

4-33

4-34

4-38

4-46

4-61

4-62

4-67

4-68

4-69

5-1

6-3

6-16

6-21

7-6

7-10

7-14

TECHNICAL

MANUAL

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