IBM Personal System/2 60 Manuale per l'uso e la cura

First Edition (May, 1988)

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Personal System/2 is a registered trademark of the International Business Machines

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1988.

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Preface

The Technical Reference library is intended for those who develop

hardware and software products for IBM Personal Computers and

IBM Personal System/2. Users should understand computer

architecture and programming concepts.

This technical reference provides hardware and software interface

information for the IBM Personal System/2 Model

and should be

used with the following publications:

IBM Personal Systeml2 Hardware Interface Technical Reference

IBM Personal Systeml2 and Personal Computer BIOS Interlace

Technical Reference

This manual consists of the following sections:

Section

"System Overview," describes the system, features,

and specifications.

Section

"Programmable Option Select," describes registers

used for configuration.

Section

"System Board," describes the system specific

hardware implementations

Warning:

The term "Reserved" describes certain signals, bits, and

registers that should not be changed. Use of reserved areas can

cause compatibility problems, loss of data,

permanent damage to

the hardware. When the contents of a register are changed, the state

of the reserved bits must

preserved. When possible, read the

For information about components

devices not described in this

manual, refer to the Hardware Interlace Technical Reference.

Information about diskette drives, fixed disk drives, adapters, and

external options are in separate option technical references.

III

Notes:

Contents

Section 1. System Overview

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

1-1

Description

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

1-3

System Board Features

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

1-3

System Board Block Diagram

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

1-5

System Board I/O Address Map

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

1-6

Specifications

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

1-7

Section

Programmable Option Select . . . . . . . . . . . . . . . . .

2-1

Description

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

2-3

POS

Address Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-5

Card Selected Feedback

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

2-6

System Board Setup

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

2-6

System Board Enable/Setup Register (Hex

0094)

.........

2-7

System Board

POS

0102)

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

2-8

System Board

POS

0103)

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

2-9

Adapter Enable/Setup Register (Hex

0096)

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

2-10

Section 3. System Board

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

3-1

Description

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

3-3

Micro

Channel

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

3-3

Adapter Identification

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

3-3

Central

Arbiter

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

3-3

Memory

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

3-7

Read-Only Memory Subsystem

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

3-7

Random Access Memory Subsystem

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

3-7

Real-Time Clock/Complementary Metal-Oxide Semiconductor

RAM

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

3-10

Miscellaneous System Functions

..........

. . . . . . . . .

3-21

Nonmaskable Interrupt

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

. . . . . .

3-21

System Control Port B (Hex 0061)

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

3-21

System Control Port A (Hex 0092)

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

3-23

Power-On Password

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

3-25

Hardware Compatibility

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

3-26

Index

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

X-1

Notes:

Figures

1-1. System Board Devices and Features

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

1-4

1-2.

System Board

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

1-5

1-3.

System Board I/O Address Map

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

1-6

1-4. Performance Specifications -System Board

.......

1-7

1-5.

Physical Specifications

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

1-8

2-1.

POS

I/O Address Map

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

2-5

2-2.

Card Selected Feedback Register (Hex

0091)

.......

2-6

2-3.

System Board Enable/Setup Register (Hex

0094)

.....

2-7

2-4.

System Board

POS

0102)

..........

2-8

2-5.

Parallel Port Select Bits

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

2-8

2-6.

System Board

POS

...........

2-9

2-7.

Adapter Enable/Setup Register (Hex 0096)

........

2-10

3-1. Arbitration Bus Priority Assignments

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

3-4

3-2. Arbitration Register, Write to Hex

0090

...........

3-5

3-3. Arbitration Register, Read Hex

0090

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

3-5

3-4. System Memory Map

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

3-8

3-5.

System Board Memory Connector

...........

. . . . 3-9

3-6. RT/CMOS RAM Address Map

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

3-10

3-7. RT/CMOS Address Register and NMI Mask (Hex

0070)

3-11

3-8.

/CMOS Data Register (Hex

0071)

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

3-11

3-9. Real-Time Clock Bytes

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

3-13

3-10. Status Register A

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

3-13

3-11. Status Register B

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

3-14

3-12. Status Register C

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

3-15

3-13. Status Register D

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

3-16

3-14. Diagnostic Status Byte

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

3-16

3-15. Diskette Drive Type Byte

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

3-17

3-16. Diskette Drive Type Byte (Bits 7 -

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

3-18

3-17. Diskette Drive Type Byte (Bits 3 -

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

3-18

3-18. Equipment Byte

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

3-19

3-19.

Equipment Byte (Bits

7,6)

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

3-19

3-20. Equipment Byte (Bits

5,4)

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

3-19

3-21. System Control Port B (Write)

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

3-22

3-22. System Control Port B (Read)

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

3-22

3-23. System Control Port A (Hex

0092)

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

3-23

vII

Notes:

vIII

Section 1. System Overview

Description

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

1-3

System Board Features

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

1-3

System Board Block Diagram

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

1-5

System Board 1/0 Address Map

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

1-6

Specifications

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

1-7

Model 60 System

Overview

1-1

Notes:

1·2

Model

System Overview

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