Samsung AlphaPC 164UX Product manual

AlphaPC 164UX/BX Motherboard
Technical Reference Manual
Preliminary

Notice
The information in this publication has been carefully checked and is believed to be entirely accurate at the time of publication.
Samsung assumes no responsibility, however, for possible errors or omissions, or for any consequences resulting from the use
of the information contained herein.
Samsung reserves the right to make changes in its products or product specifications with the intent to improve function or
design at any time and without notice and is not required to update this documentation to reflect such changes.
This publication does not convey to a purchaser of semiconductor devices described herein any license under the patent rights of
Samsung or others.
AlphaPC 164UX/BX Motherboard
Technical Reference Manual
©1998 Samsung Electronics
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by
any means, electric or mechanical, by photocopying, recording, or otherwise, without the prior written consent of Samsung
Electronics.
Samsung and Samsung logo are trademarks of Samsung Electronics Co., Ltd.
Alpha, Digital Semiconductor are trademarks of Digital Equipment Corporation.
FaxBACK and Intel are registered trademarks of Intel Corporation.
GRAFOIL is a registered trademark of Union Carbide Corporation.
Microsoft, MS-DOS, Windows, and Windows 95 are registered trademarks and Windows NT is a trademark of Microsoft
Corporation.
Dallas is a registered trademark of Dallas Semiconductor Corporation.
Q is a registered trademark of Quality Semiconductor,Inc.
SYMBIOS is a registered trademark of Symbios,Inc.
AMD is a registered trademark of Advanced Micro Devices,Inc.
SMC is a registered trademark of Standard Microsystems Corporation.
All other trademarks and registered trademarks are the property of their respective owners.
San #24 Nongseo-ri, Kiheung-eup
Yongin-city, Kyungki-do, Korea
449-900
FAX : [phone]
TEL : [phone]
Printed in the Republic of Korea

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Contents
Preface
1 Introduction to the AlphaPC 164UX Motherboard
1.1 System Components and Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–1
1.1.1 Digital Semiconductor 21174 Core Logic Chip . . . . . . . . . . . . . . . . . . . . . . . 1–3
1.1.2 Memory Subsystem. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–3
1.1.3 L3 Bcache Subsystem Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–5
1.1.4 PCI Interface Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–6
1.1.5 ISA Interface Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–6
1.1.6 Miscellaneous Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–6
1.2 Software Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–7
1.2.1 ARCSBIOS Windows NT Firmware. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–7
1.3 Hardware Design Support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–7
2 System Configuration and Connectors
2.1 AlphaPC 164UX Jumper Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–3
2.2 CPU Speed Selection (Option 1,2,3,&4). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–5
2.3 Bcache Size Jumpers (Option 14,15). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–5
2.4 Boot Option Jumper (Option 11). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–5
2.5 AlphaPC 164UX Connector Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–5
2.5.1 PCI Bus Connector Pinouts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–5
2.5.2 ISA Expansion Bus Connector Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–8
2.5.3 SDRAM DIMM Connector Pinouts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–9
2.5.4 EIDE Drive Bus Connector Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–10
2.5.5 Diskette Drive Bus Connector Pinouts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–11
2.5.6 Parallel Bus Connector Pinouts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–11
2.5.7 COM1/COM2 Serial Line Connector Pinouts. . . . . . . . . . . . . . . . . . . . . . . . . 2–12
2.5.8 Keyboard/Mouse Connector Pinouts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–12
2.5.9 Input Power Connector Pinouts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–13

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2.5.10 Narrow SCSI Bus Connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–13
2.5.11 Fast and Wide SCSI Bus Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–14
2.5.12 10/100 Mbit Ethernet Connector Pinouts. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–14
2.5.13 Speaker Connector Pinouts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–15
2.5.14 Microprocessor Fan Power Connector Pinouts. . . . . . . . . . . . . . . . . . . . . . . 2–15
2.5.15 Pin Power LED Connector Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–15
2.5.16 IDE Drive LED Connector Pinouts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–16
2.5.17 Reset Switch Connector Pinouts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–16
2.5.18 Soft Power Connector Pinouts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–16
2.5.19 SCSI LED Connector Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–16
3 Functional Description
3.1 AlphaPC 164UX Bcache Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–2
3.2 Digital Semiconductor 21174 Core Logic Chip . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–2
3.2.1 21174 Chip Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–3
3.2.2 Main Memory Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–4
3.2.3 PCI Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–4
3.2.4 System-IO (SIO) Chip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–6
3.2.5 Ethernet LAN Controller Chip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–6
3.2.6 PCI-Ultra SCSI (Fast-20) I/O Processor Chip . . . . . . . . . . . . . . . . . . . . . . . . 3–7
3.2.7 PCI Expansion Slots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–8
3.3 ISA Bus Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–8
3.3.1 Combination Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–9
3.3.2 XD Bus Device. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–10
3.3.3 ISA Expansion Slots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–10
3.3.4 ISA I/O Address Map. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–10
3.4 Flash ROM Address Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–10
3.5 Interrupts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–11
3.6 System Clocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–15
3.7 Reset and Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–17
3.8 DC Power Distribution. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–18
4 Upgrading the AlphaPC 164UX
4.1 Upgrading SDRAM Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–1
4.2 Increasing Microprocessor Speed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–1
4.2.1 Preparatory Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–2
4.2.2 Required Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–2
4.2.3 Removing the 21164 Microprocessor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–2
4.2.4 Installing the 21164 Microprocessor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–3

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5 Power and Environmental Requirements
5.1 Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–1
5.2 Environmental Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–1
5.3 Physical Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–2
5.3.1 Board Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–2
5.3.2 Board Measurements and Hole Locations. . . . . . . . . . . . . . . . . . . . . . . . . . . 5–3
5.3.3 Board Vertical Clearance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–4
5.3.4 ATX I/O Shield Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–5
A System Address Space
A.1 Address Map. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A–1
A.2 PCI Address Space. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A–6
A.3 21164 Address Space. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A–7
A.3.1 System Address Map. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A–10
A.4 21164 Byte/Word PCI Space . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A–12
A.4.1 21164 Size Field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A–14
A.5 Cacheable Memory Space . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A–15
A.6 PCI Dense Memory Space . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A–15
A.7 PCI Sparse Memory Space . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A–17
A.7.1 Hardware Extension Register (HAE_MEM). . . . . . . . . . . . . . . . . . . . . . . . . . A–18
A.7.2 Memory Access Rules and Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A–18
A.8 PCI Sparse I/O Space. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A–23
A.8.1 Hardware Extension Register (HAE_IO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . A–23
A.8.2 PCI Sparse I/O Space Access Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . A–23
A.9 PCI Configuration Space . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A–26
A.10 PCI Special/Interrupt Cycles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A–31
A.11 Hardware-Specific and Miscellaneous Register Space . . . . . . . . . . . . . . . . . . . . A–31
A.12 PCI to Physical Memory Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A–32
A.13 Direct-Mapped Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A–37
A.14 Scatter-Gather Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A–38
A.15 Scatter-Gather TLB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A–40
A.15.1 Scatter-Gather TLB Hit Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A–42
A.15.2 Scatter-Gather TLB Miss Process. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A–42
A.16 Suggested Use of a PCI Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A–44
A.16.1 Peripheral Component Architecture Compatibility Addressing and Holes. . . A–45
A.16.2 Memory Chip Select Signal mem_cs_l . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A–45
B Supporting Products
B.1 Memory. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B–1
B.2 Thermal Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B–3
B.3 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B–3