IBM THINKPAD 600, THINKPAD 600E Service Manual

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	Note
Before		using this	information and the product it supports,	be sure to read the
general		information	under Appendix C.

First

Edition

(April

1998)

The

following

paragraph does

not

apply

to

the

United

Kingdom

or

any

country

where such provisions are inconsistent with local law:

INTERNATIONAL BUSINESS MACHINES CORPORATION PROVIDES THIS

PUBLICATION “AS IS” WITHOUT ANY WARRANTY

OF

ANY

KIND,

EITHER

EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,

THE

LIMITED

WARRANTIES

OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR

PURPOSE. Some

states

do

not allow disclaimer or express or implied warranties in

certain

transactions; therefore,

this

statement

may not apply to you.

This

publication

could

include

technical

inaccuracies

or

typographical

errors. Changes

are

periodically

made

to the information herein; these changes will be incorporated in

new

editions

of

the

publication. IBM

may

make

improvements

or

changes

to

the

products

or the programs described in this publication at any time.

It

is

possible

that

this publication may contain references to, or information about, IBM

products

(machines and programs), programming, or

services

that

are

not

announced

in

your

country. Such

references

or

information

must

not

be construed

to

mean that

IBM intends to announce such IBM products, programming, or

services

in

your

country.

Requests for technical information about IBM products should be made to your IBM

authorized dealer or your IBM marketing representative.

Copyright

International

Business Machines

Corporation

1998.

All

rights

reserved.

Note to US Government Users – Documentation related to restricted rights

–

Use,

duplication, or disclosure is subject

to restrictions

set

forth

in GSA ADP

Schedule

Contract

with

IBM

Corp.

Contents

Figures . . . . . . . . . . . . . . .

Preface . . . . . . . . . . . . . . .

vii. . . . . . . . . . . . . . . .

ix. . . . . . . . . . . . . . . .

Section 1.	System Overview	. . . . . . . . . 1.-1 . . . . . . . . .
Description . . . . . . . . . . . .			. . 1.-2 . . . . . . . . . . . . . . .
System	Board Devices	and Features. . . . . . . .	. . . . 1.-3. .

System Board I/O Address. .Map. . . . . . . . . . . . 1. -5. . .

Specifications. . . . . . . . . . . . . .1-7. . . . . . . . . . . . . . .

Performance Specifications. . . . . . . . . 1.-7 . . . . . . . . .

Physical Specifications. . . . . . . . . . 1. -8 . . . . . . . . . . .

Electrical Specifications. . . . . . . . . . 1.-9 . . . . . . . . . .

Acoustical Readings . . . . . . . . . . . 1-.9 . . . . . . . . . . .

Power Supply		. . . . . . . . . . . . . 1.-10. . . . . . . . . . . . . .
Voltages . . . .			. . . . . . . .	. .1-10. . . . . . . . . . . . . . .
Output Protection . .			. . . . . . . . . .1-11. . . . . . . . . . . .
Voltage Sequencing . . . . . . . . .				. . 1.-11. . . . . . . . . . .
Power	Supply	Connector. . . . . . . . . . . . . . . .1.-11. . .
Battery Pack . . . .			. . . . . . .	. . 1.-12. . . . . . . . . . . . . .
Section 2.	System Board		. . . . . . . . . .		2-.1 . . . . . . . . . .
Description . . . . . . . . . . . . . .					2.-2 . . . . . . . . . . . . . . .
Microprocessor . . . . . . . . . . . . .					2.-2 . . . . . . . . . . . . . .
Cache Memory Operation. . . . . . . . . . . . . . . .2.-2. . .
Cacheable Address Space. . . . . . . . . . . . . . . .2.-3. . .
Bus Adapter . . . . . . . . . . . . . .					2.-3 . . . . . . . . . . . . . . .
Keyboard/Mouse Connector			. . . . . . . . . .		2-.4 . . . . . . . . . .

Signals	. . . . . . . . . . . . . . .2-4. . . . . . . . . . . . . . . .
Connector		.	. . .	. . . . . . . . . .2-4. . . . . . . . . . . . . . .
Scan Codes		. . . . . . . . . . . . . 2.-4 . . . . . . . . . . . . . .
Keyboard ID . . . . . . . . . . . . . 2.-6 . . . . . . . . . . . . . .
Displayable Characters and Symbols. . . . . . . . . . . .2-.7 .
Hard Disk Drive			Connector. . . . . . . . . . . . . . . . .2-.8 . . .
External Bus		Connector. . . . . . . . . . . . . . . . . .2.-8 . . . .
UltraSlim Bay Connector. . . . . . . . . . . . . . . . .2-.11. . .
Diskette Drive and Controller. . . . . . . . . . . . . . . 2.-14. . .
Memory	. . . . . . . . . . . . . . .2-15. . . . . . . . . . . . . . . .
ROM Subsystem			. .	. . . . . . . . . .2-15. . . . . . . . . . . .
RAM Subsystem			. . . . . . . . . . . . 2-.15 . . . . . . . . . . . .
System	Memory		Map . . . . . . . . . . . . . . . . . 2. -16. . . .
System Board Memory for the DIMM Connectors. . . . . 2-17
Copyright	IBM	Corp. 1998		iii

RT/CMOS RAM

. .

. . . . . . . . . . 2-.18 . . . . . . . . . . . .

Miscellaneous

System

Functions and

Ports. . . . . . . . .2.-28

Nonmaskable

Interrupt

(NMI). . . . . . . . . . . . . .2.-28. .

System

Control

Port

A

(Hex

0092). . . . . . . . . . . .2-.29.

System

Control

Port

B

(Hex

.0061). . . . . . . . . . .2-.30.

Power-On Password

.

. . . . . . . . . .2-31. . . . . . . . . . .

Other Passwords . .

. . . . . . . . . .2-31. . . . . . . . . . . .

Selectable Drive-Startup Sequence. . . . . . . . . . . .2-.32.

Hardware Compatibility .

. . . . . . . . . .2-33. . . . . . . . . . .

Error Codes . . . .

. . . . . . . . . .2-34. . . . . . . . . . . . . . .

Section 3. Subsystems

. . .

. . . . . . . 3. -1. . . . . . . . . . .

Video Subsystem . . .

. .

. .

.

.

.

.

.

.3-2. . . . . . . . . . . . . .

Video Modes . . .

. . . . . . . . . . 3.-3 . . . . . . . . . . . . . .

Modem Subsystem

. .

. . .

.

.

.

.

.

.

. 3.-5 . . . . . . . . . . . . .

ThinkPad Modem

. .

. . . . . . . . . .3-5. . . . . . . . . . . . .

MIDI

Port

Function. . . . . . . . . . . . . . . . . . .3-.5 . . . .

Sound

Blaster

Support

Function. . . . . . . . . . . . .3.-5 . .

Telephony

(Modem)

Function. . . . . . . . . . . . . . 3. -6. . .

Audio Subsystem . . .

. . . . . . . . . .3-6. . . . . . . . . . . . . .

MIDI

Port

Function. . . . . . . . . . . . . . . . . . .3-.6 . . . .

Sound

Blaster

Support

Function. . . . . . . . . . . . .3.-7 . .

Audio Port Specifications. . . . . . . . . . . . . . . . .3-.7 . . .

Infrared (IR) Subsystem. . . . . . . . . . . . . . . . . .3.-8 . . . .

IRQ

Level

and

DMA

Channel. . . . . . . . . . . . . . 3. -8. . .

PC Card

Subsystem . . . . . . . . . . . . . . . . . . . 3.-9. . . . .

Pin Assignments

. .

. . . . . . . . . . 3-.10 . . . . . . . . . . . .

IDE Channel on the UltraSlim. Bay. . . . . . . . . . . . 3.-12. .

MIDI/Joystick Port. .

. . . . . . . . . . 3-.12. . . . . . . . . . . .

MIDI Interface. . . . . . . . . . . . 3.-12. . . . . . . . . . . . .

Joystick Interface. .

. . . .

. . . . . .3-13. . . . . . . . . . . .

Appendix A.

System Resources

. . . . . . . .A-1. . . . . . . .

Appendix B. System Management API (SMAPI)

BIOS

Overview

. . . . . . . . . . . . . . B-.1 . . . . . . . . . . . . . . .

Overview . . . . . . . . . . . . . . . B-.3 . . . . . . . . . . . . . . . .

Header Image . . . .

. .

. .

. . . . . .B-4. . . . . . . . . . . . . . .

Calling Convention

. .

. . .

.

.

.

.

.

.

. B.-6 . . . . . . . . . . . . .

Parameter Structure .

. . . . . . . . . . B-6. . . . . . . . . . . .

Calling

Convention

Pseudo Code. . . . . . . . . . . . B.-10. .

Return Codes . . . .

. . . . . . . . . B.-11. . . . . . . . . . . . . .

Function Description . .

. . . . . . . . . B.-12. . . . . . . . . . . .

System Information Service. . . . . . . . . . . . . . .B-12. . .

System

Configuration

Service. . . . . . . . . . . . . .B-.22. .

iv

Power	Management		Service. . . . . . . . . . . . . . .B-29. . .
Event	Bit Definition. . . . . . . . . . . . . . . . . .B.-34. . . .
Samples		. . . . . . . . . . . . . .B-53. . . . . . . . . . . . . . .
Function Declaration . . . . . . . . . . .B-57. . . . . . . . . . .
Installation Check			. . . . . . . . . .	.	B.-58 . . . . . . . . . . . .
BIOS Call		. .	. . . . . . . . . .	.	.B-62. . . . . . . . . . . . . . .
Appendix C.	Appendix C		. . . . . . . .	. . C-1. . . . . . . . . . .
Index	. . . .		. . . . . . . . . .	.	. X-.1 . . . . . . . . . . . . . . .

v

vi

Figures

1-1.

Model and Submodel Bytes. . . . . . . . . . . . 1.-2. .

1-2.

System Board Devices and Features. . . . . . . . .1-.3

1-3.

System Board I/O Address. . .Map. . . . . . . .1.-5 .

1-4.

Performance Specifications. . . . . . . .1-7. . . . . . . .

1-5.

Physical Specifications. . . . . . . . .1-8. . . . . . . . .

1-6.

Electrical Specifications. . . . . . . . .1-9. . . . . . . . .

1-7.

Acoustical Readings. .

. . . . . . . .1-9. . . . . . . . . .

1-8.

Power

Supply Maximum

Current . . . . . . . . . .1-.10

1-9.

Voltage

Pin

Assignments

for the 56W AC .Adapter1-11

1-10.

Lithium-Ion Battery Pack Specifications. . . . . . . .1-12

2-1.

Keyboard and Mouse Signals. . . . . . . . . . . .2-.4 .

2-2.

Keyboard/Mouse

Connector

Pin

Assignments. . . . . 2-4

2-3.

Key

Numbers

for

the

85-Key Keyboard. . . . . . . .2.-5

2-4.

Key

Numbers

for

the

86-Key Keyboard. . . . . . . .2.-5

2-5.

Key

Numbers

for

the

90-Key Keyboard. . . . . . . .2.-6

2-6.

Key

Numbers

for

the

External Numeric. .Keypad. . 2-7

2-7.

Hard

Disk

Drive

Connector

Pin

Assignments. . . . . 2-8

2-8.

240-Pin External Bus Connector Pin Assignments. . 2-9

2-9.

UltraSlim

Bay

Connector

Pin

Assignments. . . . . . 2-12

2-10.

Diskette Drive

Read,

Write, and

Format Capabilities

2-14

2-11.

System

Memory

Map. . . . . . . . . . . . . . .2-.16. .

2-12. DIMM

Adapter

Card

Memory

Connector

Pin

Assignments

. . . . . . . . . . . 2.-17 . . . . . . . . . . .

2-13.

RT/CMOS

RAM

Address

Map . . . . . . . . . . .2.-18.

2-14.

RT/CMOS

Address

and

NMI

Mask

Register (Hex

0070)

. . . . . . . . . . . . . 2-.19 . . . . . . . . . . . . .

2-15.

RT/CMOS Data Register (Hex .0071). . . . . . . 2.-19

2-16.

Real-Time Clock Bytes

(Hex

000–.00D). . . . . . .2-21

2-17.

Status Register A (Hex. . .00A). . . . . . . . .2-.21.

2-18.

Status Register B (Hex. . .00B). . . . . . . . .2-.22.

2-19.

Status Register C (Hex. . 00C). . . . . . . . . .2-.23.

2-20.

Status Register D (Hex. . .00D). . . . . . . . .2-.23.

2-21.

Diagnostic Status Byte (Hex. . . 00E). . . . . . .2-.24

2-22.

Diskette Drive Type Byte . (Hex. . . .010). . . .2.-25

2-23.

Diskette Drive Type Bits. . . .7–4. . . . . . . .2-.25.

2-24.

Hard Disk Type Byte (Hex. . . 011). . . . . . . 2.-25.

2-25.

Hard

Disk

Drive

Type

2 (Bits. . . . 7.–4). . . . .2-.25

2-26.

Hard

Disk

Drive

Type

3 .(Bits. . . 3. –.0) . . . .2-.25

2-27.

Hard Disk Drive Type. .Byte. . . . . . . . . . 2. -26. .

2-28.

Equipment Byte . . .

. . . . . . . 2.-26 . . . . . . . . . .

2-29. Installed Diskette Drive. . .Bits. . . . . . . . .2-.26.

Copyright IBM Corp.

1998

vii

2-30.	Display Operating Mode. Bits. . . . . . . . . . .2-.26.
2-31.	System	Control	Port	A	(Hex .0092). . . . . . . .2.-29
2-32.	System Control Port B (Hex 0061,. Write). . . . . 2-30
2-33.	System	Control	Port	B	(Hex 0061,. Read). . . . . 2-30
2-34.	Error Codes . . . .				. . . . . . . .2-34. . . . . . . . . . . .
3-1.	BIOS Video VGA Modes. . . . . . . . . . . . . .3-.3 . .
3-2.	Video	BIOS	Extended		Modes—NeoMagic NM2160. . 3-4
3-3.	PCMCIA	PC Card	Slot	Pin	Assignments. . . . . . .3-10

viii

Preface

This technical reference contains hardware and software interface information specific to the IBM ThinkPad 600 computer. This

technical reference is intended for those who develop hardware and software products for the computer. Users should understand

computer architecture and programming concepts.

This publication consists of the following sections and appendixes:

Section 1,	“System	Overview,”	describes	the system, features,
and specifications.
Section 2,	“System Board,” describes the system-specific
hardware	implementations.
Section 3,	“Subsystems,” describes the hardware functions
specific to the ThinkPad 600 computer.
Appendix A,	“System Resources,” describes the available
system resources		for the	computer and	docking stations.

Appendix B, “System Management API (SMAPI) BIOS

Overview,” describes the system software interface built into the system, called the System Management Application Program

Interface (SMAPI) BIOS, which controls the system information, system configuration, and power management features of the ThinkPad computer.

Appendix C, “Appendix C,” contains special notices and trademark information.

An index is also included.

Attention
The termReserved describes certain			signals, bits, and registers that
should not be changed. Use of reserved areas can cause
compatibility problems, loss of data, or permanent damage to the
hardware. When	the contents	of a register are changed, the state of
the reserved bits must be		preserved. Read the register first and
change only the	bits that	must be	changed.

Copyright IBM Corp. 1998

ix

x Preface

Section 1. System Overview

Description . . . . . . . . . . . . . . 1.-2 . . . . . . . . . . . . . . .

System Board Devices and Features. . . . . . . . . . . . 1.-3. .

System Board I/O Address. .Map. . . . . . . . . . . . 1. -5. . .

Specifications. . . . . . . . . . . . . .1-7. . . . . . . . . . . . . . .

Performance Specifications. . . . . . . . . 1.-7 . . . . . . . . .

Physical Specifications. . . . . . . . . . 1. -8 . . . . . . . . . . .

Electrical Specifications. . . . . . . . . . 1.-9 . . . . . . . . . .

Acoustical Readings . . . . . . . . . .		. 1-.9 . . . . . . . . . . .
Power Supply	. . . . . . . . . . . . .	1.-10. . . . . . . . . . . . . .
Voltages .	. . . . . . . . . . . . .1-10. . . . . . . . . . . . . . .
Output Protection . . . . . . . . . . .		.1-11. . . . . . . . . . . .
Voltage Sequencing . . . . . . . . . . .		1.-11. . . . . . . . . . .
Power Supply	Connector. . . . . . . . . . . . . . . .1.-11. . .
Battery Pack . . . . . . . . . . . . .		1.-12. . . . . . . . . . . . . .

Copyright IBM Corp. 1998

1-1

Description

The IBM ThinkPad 600 computer (hereafterThinkPadcalled the
computer	or thecomputer) is a notebook-size computer that features
AT bus	architecture. Each			computer	supports one	UltraSlim	Bay and
one internal hard disk drive. The ThinkPad 600 computer also
supports	an internal CD-ROM			drive or	a diskette	drive in	the
UltraSlim	Bay.
Programs	can distinguish the foregoing computer model from other
ThinkPad models by reading the system ID:
Interrupt 15H
Function code			(AH)=C0H.
Returns
ES:(BX +2)		:	Model Byte
ES:(BX +3)		:	Submodel	Byte

The system microprocessor contains an internal cache and a cache controller.

Figure 1-1		lists	the	model bytes, submodel bytes, and system clock
speed	of	the	system board		for	each model.
Model		Model	Byte	Submodel	Byte	System	Clock
		(Hex)		(Hex)
600		FC		01		33	MHz
Figure	1-1. Model		and	Submodel Bytes
For a listing of the other systems,IBM Personalrefer to the
System/2 and Personal				Computer	BIOS	Interface.

1-2 System Overview

System Board Devices and Features

Figure 1-2

lists the

system

board devices and their features. The

IBM Personal System/2 Hardware Interface Technical Reference

describes

devices

common

to

PS/2

products

by

type

number.

Device

Type

Features

Microprocessor

–

Intel

Pentium

processor with

the

MMX

technology

233 MHz

or

Intel

Pentium II

processor

233 or

266

MHz

External

cache

–

512

KB

(write

back)

System

timers

1

Channel

0: system

timer

Channel

1: refresh

generation

Channel

2: tone generator for speaker

ROM

subsystem

–

128

KB

by

4

banks

(1 KB equals

1024

bytes)

RAM

subsystem

–

32

to

160

MB

(1

MB

equals

1,048,576 bytes)

CMOS

RAM

–

128 bytes CMOS RAM with real-time

subsystem

clock/calendar+ 4

KB

NVRAM

EEPROM

–

1

K bits

subsystem

Video

subsystem

–

XGA

video

functions:

Up to 65,536 colors on the TFT XGA (1024x768) LCD and HPA XGA (1024 x 768).

Up to 16,777,216 colors on an external monitor

		See	“Video		Subsystem”		on page 3-2 for more
		details		on	the	video	subsystem.
DMA controller	1	Seven DMA		channels		(AT	compatible:)
		Four	8-bit channels and three 16-bit channels
Figure 1-2	(Part 1	of	2).	System Board Devices and Features

System Overview 1-3

Device

Type

Features

Interrupt

controller

1

15 levels of system interrupts

Keyboard/auxiliary

(interrupts are edge-triggered)

1

Internal

keyboard

device controller

TrackPoint

Auxiliary

device connector

Diskette

drive

Password

security

2

Supports:

controller

3.5-in.

diskette

(1.44

MB)

3.5-in.

diskette

(1.2

MB)

3.5-in.

diskette

(720

KB)

Serial

controller

2

EIA-232-E interface (16550 compatible)

port

Programmable

as

serial

port

1,

2,

3,

or 4

Parallel

controller

One 9-pin, D-sub connector

1

Programmable

as

parallel

port

1,

2,

or

3

port

IEEE P1284-A compatible

Supports bidirectional input and output

Enhanced Parallel Port (EPP) compatible

Expansion

bus

Extended Capabilities Port (ECP) compatible

–

Supports

externally

attached

devices:

adapter (PCI-bus)

SelectaDock

docking

system

Port replicator

PCMCIA

slots

–

Conforms to the standards for:

CardBus

Two

Type

I

or

II

PC

cards

One

Type

III

PC

card

Modem

subsystem

–

Is driven

by:

MDSP 3780i

SRAM 32 Kb by 40 bits

Crystal Audio

Voice band CODEC for modem

Internal DAA

Internal

omnidirectional

microphone

Infrared

subsystem

–

Supports:

ThinkPad IR/SIR/D-ASK (500 KHz) IR

Universal

serial

bus

–

Supports:

(USB)

USB input and output devices

Personal

Computer

Memory

Card

International

Association

Figure

1-2

(Part

2

of 2).

System Board Devices and Features

1-4 System Overview

System Board I/O Address Map

Figure 1-3 is the I/O address map.

Address

(Hex)

Device

0000–001F

DMA

Controller

(0–3)

0020,

0021

Interrupt

Controller

(Master)

0022–002F

Reserved

0040–0043

System

Timer

1

0048–004B

Reserved

0060

Keyboard,

Auxiliary

Device

0061

System

Control

Port

B

0062,

0066

Slave Controller

0064

Keyboard,

Auxiliary

Device

0070,

0071

RT/CMOS

and

NMI

Mask

0072,

0073

Extended

RT

and

CMOS

0074,

0075,

0076

Reserved

0081–0083,

0087

DMA

Page

Registers

(0–3)

0089–008B,

008F

DMA

Page

Registers

(4–7)

0092

System

Control

Port

A

0096

Reserved

0098

System Flash ROM Control Register (DCR

2282)

00A0,

00A1

Interrupt

Controller

(Slave)

00B2–00B3

Power

Management Register

00C0–00DF

DMA

Controller

(4–7)

00F0–00FF

Reserved

0130–013F

ThinkPad

Modem

0170–0177

Secondary

IDE

Registers

01F0–01F7

Primary

IDE

Registers

0201

Joystick

Port

0220–0233

Audio Subsystem - Sound Blaster

0240–0253

Audio Subsystem - Sound Blaster

026E,

026F

Super

I/O

Configuration Registers

0260–0273

Audio Subsystem - Sound Blaster

0278–027A

Parallel

Port

3

027B–027F

Reserved

0280–0283

Audio Subsystem - Sound Blaster

02E8–02EF

Serial

Port

4

02E8–02EF

IR

Port

4

02F8–02FF

Serial

Port

2

02F8–02FF

IR

Port

2

0300–0303

MIDI

Port

1

0310–0313

MIDI

Port

2

0320–0323

MIDI

Port

3

Figure

1-3

(Part

1 of 2).

System Board I/O Address Map

System Overview 1-5

Address	(Hex)		Device
0330–0333			MIDI		Port		4
0350–035F			ThinkPad		Modem
0376,	0377		Secondary			IDE		Registers
0378–037A			Parallel		Port		2
037B–037F			Reserved
0388–038B			Audio Subsystem - FM Synthesizer
0398–0399			Reserved
03B4,	03B5,	03BA	Video		Subsystem
03BC–03BE			Parallel		Port		1
03C0–03C5			Video		Subsystem
03C6–03C9			Video		DAC
03CA,	03CC,	03CE, 03CF,	Video		Subsystem
03D4,	03D5,	03DA,
03D8–03DA
03E0–03E1			PCMCIA	Interface					(DCR	2959)
03E8–03EF			Serial		Port		3
03E8–03EF			IR	Port		3
03F0–03F5, 03F7			Diskette-Drive					Controller
03F6,	03F7		Primary		IDE		Registers
03F8–03FF			Serial		Port		1
03F8–03FF			IR	Port		1
0530–0537			Audio		-	WSS	1
0538–053F			Audio		Control		Port		1
0604–060B			Audio		-	WSS	2
0770–077F			ThinkPad		Modem
0CF8–0CFB			PCI	Configuration					Address Register
0CFC–0CFF			PCI	Configuration					Data	Register
0DB0–0DBF			ThinkPad		Modem
0D38–0D3F			Audio		Control		Port		2
0E80–0E87			Audio		-	WSS	3
0E88–0E8F			Audio		Control		Port		3
0F40–0F47			Audio		-	WSS	4
0FF0–0FF7			Audio		Control		Port		4
15E8–15EF			Power		Management				Register
2120–21FF			Reserved
23C0–23C7			Reserved
EF00–EF37			Power		Management				Register
EFA0–EFAD			SMBus	IO		Space		Register
F104			Reserved
Figure	1-3	(Part 2	of 2).		System Board I/O Address Map

1-6 System Overview

Specifications

Figure 1-4 to Figure 1-7 list the specifications for the computers.

Performance	Specifications
Device/Cycle						Clock	Counts
						(66	MHz)
Microprocessor						233 or		266
						MHz
L1 cache			(64bit)
read/write hit						1	CPUCLK
L2 cache (64bit) (for						not all
models)						3-1-1-1(1-1-1			-1)
read hit (back-to-back)
write hit (back-to-back)
Memory		(64bit) (see Note)
read,		page		hit		5-1-1-1
read,		bank		miss		8-1-1-1
read,		page		miss		11-1-1-1
posted write						3-1-1-1
write retire rate from -1-1-1
write buffer
Note:
The	cycle			times	shown	for	access to			system
board		RAM	are		based	on 66	MHz	memory		bus
(SDRAM,		CAS	LATENCY=2)
Figure		1-4. Performance Specifications

System Overview 1-7

Physical Specifications

Size
Width:	300.0		mm		(12	in.)
Depth:	240.0			/	254.0 mm (9.6 / 10.16 in.)
Height:	36.5		mm		(1.46	in.)
Weight by model (approximate			value)
21U	5.45		lb
31U	5.04		lb
41U	5.47		lb
51U	5.55	lb
61U	5.06	lb
Air Temperature
System	on	(without			diskette)
	5.0°C		to		35.0°C	(41°F	to	95°F)
System	on	(with		diskette)
	10.0°C		to		35.0°C	(50°F	to	95°F)
System	off
	5.0°C		to		43.0°C	(41°F	to	110°F)
Humidity
System	(without			diskette)
	8%	to	95%
System	(with		diskette)
	8%	to	80%

Maximum altitude : 3,048 m (10,000 ft) in unpressurized conditions

Heat output: 56 W

Acoustical readings (see Figure 1-7 on page 1-9)

Electrical		(see	Figure 1-6		on	page 1-9)
Electromagnetic		compatibility:			FCC	class B
With	battery		pack	installed.
This	is the maximum altitude at						which the specified air	temperatures apply. At
higher		altitudes,		the	maximum air		temperatures are lower	than those specified.
Figure	1-5. Physical Specifications

1-8 System Overview

Electrical Specifications

			(56 W)
Input	voltage		100–240
(V	ac)
Frequency		(Hz)	50/60
Input		(kVA)	0.13
	Range is		automatically selected; sine wave input is required.
	At	maximum	configuration.

Figure

1-6. Electrical Specifications

Acoustical Readings

L

WAd in

bels

LpAm

in

dB

<L pA >m

in

dB

Operate

Idle

Operate

Idle

Operate

Idle

600

4.40

3.90

35.0

30.0

30.0

25.5

600 (with

4.60

4.30

37.5

34.0

31.0

28.0

SelectaDock

III)

Notes:

L WAd

Is

the

declared

sound

power

level

for the random

sample

of

machines.

L pAm

Is

the

mean

value

of

the

A-weighted

sound

pressure

levels

at

the

operator

position

(if

any)

for

the

random

sample of

machines.

<L pA >m

Is

the

mean

value

of

the

A-weighted

sound

pressure

levels

at

the

1

meter position for the random sample of machines.

Operate

Shows

the value

while

using

the

hard

disk

drive.

All measurements made in accordance with ANSI S12.10 and reported in

conformance

with

ISO

9296.

Figure

1-7. Acoustical Readings

System Overview 1-9

Power Supply

The power	supply converts the ac voltage to dc voltage and provides
power for	the following:

System board set

Diskette drive

Hard disk drive

CD-ROM drive

Auxiliary devices

Keyboard

LCD panel

PCMCIA cards

Voltages

The power supply generates six							different	dc voltages: VCC5M,
VCC3M,	VCC12,		and	VCCSW. Figure 1-8			shows the	maximum
current for			each	voltage.
Output			Voltage		(V dc)		Current (A)
VCC5M				+5.0			5.0
VCC3M				+3.3			5.0
VCC12				+12.0			0.50
VCCSW				+5.0			0.006
Figure	1-8. Power Supply				Maximum Current

1-10 System Overview

Output Protection

A short	circuit placed					on any	dc	output	(between two outputs	or
between	an	output		and		a dc return) latches all dc outputs into a
shutdown	state,		with		no	hazardous condition to the power supply.
If an	overvoltage			fault		occurs	in	the power supply, the power		supply
latches	all	dc	outputs			into a shutdown state before any output
exceeds 135%			of	the	nominal value			of the	power supply.

Voltage	Sequencing
When	power	is	turned	on,	the output voltages reach their operational
voltages within			2 seconds.
Power	Supply	Connector
The following connector				is	used with the AC Adapter. The total
power	capacity		of this		connector must not exceed 4.0 A.

Refer to Figure 1-9 for the appropriate adapter pin assignments.

Pin		Voltage
1		+7.0 V dc+17to.0	V dc (depending	on	charging	conditions)
2		Ground
Figure	1-9. Voltage Pin		Assignments for	the	56W AC	Adapter

System Overview 1-11

Battery Pack

The ThinkPad		computer uses a lithium-ion (Li-ion) battery pack that
meets	the	following		electrical			specifications:
Nominal	Voltage		+10.8	V dc
Capacity	(average)		3.2	ampere	hours		(AH)
Protection			Overcurrent		protection
			Overvoltage		protection
			Overdischarge			protection
			Thermal protection
Figure	1-10. Lithium-Ion			Battery		Pack Specifications

1-12 System Overview

Section 2. System Board

Description . . . . . . . . . . . . . . 2.-2 . . . . . . . . . . . . . . .

Microprocessor . . . . . . . . . . . . . 2.-2 . . . . . . . . . . . . . .

Cache Memory Operation. . . . . . . . . . . . . . . .2.-2. . .

Cacheable Address Space. . . . . . . . . . . . . . . .2.-3. . .

Bus Adapter . . . . . . . . . . . . . . 2.-3 . . . . . . . . . . . . . . .

Keyboard/Mouse Connector

. . . . . . . . . . 2-.4 . . . . . . . . . .

Signals

.

. . . . . . . . . . . . . .2-4. . . . . . . . . . . . . . . .

Connector

. . . . . . . . . . . . . .2-4. . . . . . . . . . . . . . .

Scan Codes

. . . . . . . . . . . . . 2.-4 . . . . . . . . . . . . . .

Keyboard ID . . . . . . . . . . . . . 2.-6 . . . . . . . . . . . . . .

Displayable Characters and Symbols. . . . . . . . . . . .2-.7 .

Hard Disk

Drive Connector. . . . . . . . . . . . . . . . .2-.8 . . .

External

Bus

Connector. . . . . . . . . . . . . . . . . .2.-8 . . . .

UltraSlim Bay Connector. . . . . . . . . . . . . . . . .2-.11. . .

Diskette Drive and Controller. . . . . . . . . . . . . . . 2.-14. . .

Memory

. . . . . . . . . . . . . . .2-15. . . . . . . . . . . . . . . .

ROM Subsystem

. .

. .

. . . . . . . .2-15. . . . . . . . . . . .

RAM Subsystem

. .

. . . . . . . . . . 2-.15 . . . . . . . . . . . .

System

Memory

Map

. . . . . . . . . . . . . . . . . 2. -16. . . .

System

Board

Memory

for

the

DIMM

Connectors. . . . . 2-17

RT/CMOS RAM

. .

. . . . . . . . . . 2-.18 . . . . . . . . . . . .

RT/CMOS

Address

and

NMI

Mask

Register

(Hex

0070)

2-19

RT/CMOS Data Register (Hex 0071). . . . . . . . . .2-.19

RT/CMOS

RAM

I/O Operations . . . . . . . . . . . .2-.20.

CMOS

RAM

Configuration

. . . . . . . . . . . . . .2.-24. .

Miscellaneous

System

Functions

and

Ports. . . . . . . . .2.-28

Nonmaskable

Interrupt

(NMI). . . . . . . . . . . . . .2.-28. .

System

Control

Port

A

(Hex

0092). . . . . . . . . . . .2-.29.

System

Control

Port

B

(Hex

.0061). . . . . . . . . . .2-.30.

Power-On Password

.

. . . . . . . . . .2-31. . . . . . . . . . .

Other Passwords . .

. . . . . . . . . .2-31. . . . . . . . . . . .

Selectable Drive-Startup Sequence. . . . . . . . . . . .2-.32.

Hardware Compatibility .

. . . . . . . . . .2-33. . . . . . . . . . .

Error Codes . . . .

. .

. .

.

. .

. .

.2-34. . . . . . . . . . . . . . .

Copyright IBM Corp. 1998

2-1

Description

This section describes the microprocessor, connectors, memory subsystems, and miscellaneous system functions and ports for the ThinkPad 600 computer.

Microprocessor

The	ThinkPad 600 uses		the Intel Pentium II	233		MHz	processor
with	MMX	technology	or the Intel Pentium	233	or	266	MHz
processor.
The	processor has a 32-bit address bus			and a 64-bit data bus. It is
software-compatible with all previous microprocessors. The
processor		has an internal, split data and		instruction,			32-KB
write-back		cache. It includes pipelined math			coprocessor functions
and	superscalar architecture (two execution units).
Cache	Memory	Operation

In addition to the 32 KB of internal Level 1 (L1) cache memory in the

microprocessor, the system board of the

ThinkPad

600

computer

contains an

additional

512

KB

of external

Level

2

(L2) cache

memory.

The

cache

memory in the Intel Pentium II microprocessor and

the

L2

external cache memory enable the microprocessor to read

instructions

and data much faster than if the microprocessor

had

to

access system memory. When an instruction

is

first

used

or

data

is

first

read

or written, it is transferred to the cache memory

from

main

memory.

This

enables future accesses to the instructions or data to

occur

much

faster.

The

cache

is disabled and

empty

when

the

microprocessor

comes

out of the reset state. The cache is

tested and

enabled

during

the

power-on self-test (POST).

The

cache

memory in the Intel Pentium II

microprocessor

is

loaded

from

system

memory in 32-byte increments, each referred to

as

a

cache line. A cache line is aligned on a paragraph boundary. A

reference

to any byte contained in a

cache

line

results

in

the

entire

line

being

read

into

the

cache

memory

(if the data was not

already in

the

cache). When

the

microprocessor gives

up

control

of

the

system

2-2

System Board

bus,

the

cache memory enters “snoop” mode and monitors all write

and

read

operations. If memory data is written

to

a

location

in

the

cache and the cache line is in

the “modified” state, the corresponding

cache line

is

written

back

to system

memory

and

invalidated.

When

the

microprocessor

performs

a

memory

read,

the

data

address

is

used

to find the data in the

cache. If

the

data is found (a hit), it is

read

from

the

cache

memory

and

no

external

bus

cycle

occurs. If

the

data

is

not

found

(a

miss),

an

external

bus

cycle is used to read

the

data

from

system

memory. If

the

address

of

the

missed

data

is

in

cacheable

address

space,

the data is

stored

in

the

cache

memory

and

the

remainder

of

the

cache

line

is

read.

When the microprocessor performs a memory write, the data

address

is

used

to

search

the

cache. If

the

address

is

found

(a hit),

the

data

is written to the cache

and

no

external

bus cycle is used to

write the data to system memory. (If the address of the write

operation

was not in the cache

memory but was in cacheable

address

space,

the

data

is

read

back

into

the

cache

memory and

the

remainder

of

the

cache line

is

read.)

Cacheable

Address

Space

Cacheable

address

space

is

defined

as

system

memory

that

resides

on

the

system board (0–640 KB and

1 MB–256 MB). Cacheability of

system

memory

is

up

to

64

MB

for

Pentium or 512

MB

for

Pentium

II

in

the

L2 cache. Nothing in address range hex A0000–BFFFF, I/O

address

space,

or

memory

in

any

AT

slot

is

cached.

ROM address space (hex C0000–C9FFF and F0000–FFFFF) is L1

cacheable codefor read operations. Ifonlydata in this address

range

is

already

in

cache

memory

and the

address

range

is

written

to,

the

cached

line

is

invalidated

and

is

read

again

from

RAM,

where

the

BIOS

is

shadowed.

Bus Adapter

When the computer is attached to

the

ThinkPad SelectaDock

III

docking

system,

the

PCI adapters

or

AT-bus

adapters

can

be

used

through

the

docking

system.

System Board 2-3

Keyboard/Mouse Connector

Each	ThinkPad computer has	a	keyboard/mouse	connector, where
the	IBM mouse, keyboard,	or	numeric keypad	is connected.

Signals

The keyboard and mouse signals are				driven by open-collector drivers
pulled to 5 V dc through a pull-up				resistor. Figure 2-1 lists the
signals.
Sink current	1 mA			Maximum
High-level output voltage	5.0	V	dc minus	pullupMinimum
Low-level output voltage	0.5	V	dc	Maximum
High-level input voltage	2.0	V	dc	Minimum
Low-level input voltage	0.8	V	dc	Maximum

Figure 2-1. Keyboard and Mouse Signals

Connector

The keyboard/mouse connector uses a 6-pin, miniature DIN connector.

6	5
4	3
2	1

Pin	I/O	Signal Name
1	I/O	Mouse	Data
2	I/O	Keyboard		Data
3	–	Ground
4	–	+5 V	dc
5	I/O	Mouse	Clock
6	I/O	Keyboard		Clock
Figure	2-2. Keyboard/Mouse		Connector		Pin	Assignments
Note:	The maximum	current		for +5	V	dc (pin 4) is 0.5 A.

Scan Codes

Figure 2-3 shows the key numbers assigned to keys on the 85-key keyboard (for the U.S.).

2-4 System Board

Figure 2-3. Key Numbers for the 85-Key Keyboard
Figure 2-4 shows the key numbers assigned to keys	on the 86-key
keyboard (for countries other than the U.S.and	Japan).

Figure 2-4. Key Numbers for the 86-Key Keyboard

Figure 2-5	on	page 2-6 shows	the key numbers assigned to the
keys on	the	90-key keyboard	(for Japan).

System Board 2-5

Figure 2-5. Key Numbers for			the 90-Key Keyboard
For scan	codes	assigned	to each numbered key,IBM refer to the
Personal	System/2	Hardware	Interface Technical. Reference

Keyboard ID

The	keyboard ID	consists	of 2 bytes: hex 83AB		(the built-in keyboard
with	the external	numeric	keypad)	or hex 84AB (the built-in keyboard
only). Interrupt 16H, function code				(AH)=0AH, returns	the keyboard
ID	in BX.

2-6 System Board

Figure 2-6 shows the key numbers assigned to keys on the external

numeric		keypad. For scan codes assigned to each numbered key,
refer toIBMthePersonal System/2 Hardware Interface Technical
Reference.
90	95	100	105
91	96	101
			106

9297 102

9398 103

	108
99	104

Figure 2-6. Key Numbers for the External Numeric Keypad

Displayable Characters and Symbols

For displayable characters and symbols that are keyable from the keyboard, referIBMto Personalthe System/2 Hardware Interface

Technical Reference.

System Board 2-7