IEI Technology Wafer-GX User manual

WAFER-GX
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Revision
MODEL WAFER-LX2 AMD Geode LX800 Motherboard
Revision Number Description Date of Issue
1.0 Initial release November 2006

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Copyright
COPYRIGHT NOTICE
The information in this document is subject to change without prior notice in order to
improve reliability, design and function and does not represent a commitment on the part
of the manufacturer.
In no event will the manufacturer be liable for direct, indirect, special, incidental, or
consequential damages arising out of the use or inability to use the product or
documentation, even if advised of the possibility of such damages.
This document contains proprietary information protected by copyright. All rights are
reserved. No part of this manual may be reproduced by any mechanical, electronic, or
other means in any form without prior written permission of the manufacturer.
TRADEMARKS
IBM PC is a registered trademark of International Business Machines Corporation. INTEL
is a registered trademark of INTEL Corporation. Other product names mentioned herein
are used for identification purposes only and may be trademarks and/or registered
trademarks of their respective owners.

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Table of Contents
1INTRODUCTION..................................................................................................... 1
1.1 WAFER-GX OVERVIEW............................................................................................ 2
1.1.1 WAFER-GX Models ........................................................................................... 2
1.1.2 WAFER-GX Applications ................................................................................... 2
1.1.3 WAFER-GX Benefits .......................................................................................... 2
1.1.4 WAFER-GX Features ......................................................................................... 3
1.2 WAFER-GX OVERVIEW............................................................................................ 4
1.2.1 WAFER-GX Connectors..................................................................................... 5
1.2.2 Technical Specifications..................................................................................... 7
2DETAILED SPECIFICATIONS ............................................................................. 9
2.1 OVERVIEW ............................................................................................................... 10
2.2 BOARD DIMENSIONS ................................................................................................ 10
2.2.1 Board Dimensions............................................................................................ 10
2.2.2 External Interface Panel Dimensions ...............................................................11
2.2.3 Embedded AMD

Geode™ GX 466 Specifications..........................................11
2.3 SYSTEM CHIPSET ..................................................................................................... 12
2.4 DATA FLOW.............................................................................................................. 13
2.5 GRAPHICS SUPPORT ................................................................................................. 13
2.6 MEMORY SUPPORT ................................................................................................... 15
2.7 PCI BUS INTERFACE SUPPORT ................................................................................. 15
2.8 ETHERNET CONTROLLER SPECIFICATIONS ............................................................... 15
2.8.1 Overview .......................................................................................................... 15
2.8.2 Features ........................................................................................................... 16
2.8.3 SATA Drives ..................................................................................................... 16
2.8.4 IDE HDD Interfaces ........................................................................................ 17
2.8.5 CompactFlash Support .................................................................................... 17
2.9 SERIAL PORTS .......................................................................................................... 17
2.10 REAL TIME CLOCK................................................................................................. 17
2.11 SYSTEM MONITORING ............................................................................................ 17
2.12 USB INTERFACES................................................................................................... 18

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2.13 BIOS ..................................................................................................................... 18
2.14 OPERATING TEMPERATURE AND TEMPERATURE CONTROL..................................... 18
2.15 AUDIO CODEC ........................................................................................................ 18
2.16 POWER CONSUMPTION........................................................................................... 20
2.17 PACKAGED CONTENTS AND OPTIONAL ACCESSORY ITEMS..................................... 20
2.17.1 Package Contents........................................................................................... 20
2.17.2 Optional Accessory Items............................................................................... 21
3CONNECTORS AND JUMPERS ......................................................................... 23
3.1 PERIPHERAL INTERFACE CONNECTORS .................................................................... 24
3.1.1 WAFER-GX Layout .......................................................................................... 24
3.1.2 Peripheral Interface Connectors ..................................................................... 25
3.1.3 External Peripheral Interface Connectors....................................................... 26
3.1.4 Onboard Jumpers............................................................................................. 27
3.2 INTERNAL PERIPHERAL CONNECTORS...................................................................... 27
3.2.1 AT Power Input Connector .............................................................................. 27
3.2.2 ATX Power Connector ..................................................................................... 28
3.2.3 Audio Connector .............................................................................................. 29
3.2.4 CompactFlash Connector ................................................................................ 30
3.2.5 Digital Input/Output (DIO) Connector............................................................ 32
3.2.6 Fan Connector ................................................................................................. 33
3.2.7 IDE Connector ................................................................................................. 34
3.2.8 Inverter Power Connector ............................................................................... 36
3.2.9 Keyboard and Mouse Connector ..................................................................... 37
3.2.10 LED Connector .............................................................................................. 38
3.2.11 LCD LVDS Connector.................................................................................... 39
3.2.12 LCD TTL Connector ...................................................................................... 41
3.2.13 Parallel Port Connector ................................................................................ 43
3.2.14 PC/104 Slot .................................................................................................... 45
3.2.15 Power Switch Connector................................................................................ 48
3.2.16 Reset Button Connector ................................................................................. 49
3.2.17 RS-232/422/485 Serial Port Connectors ....................................................... 50
3.2.18 SATA Drive Connectors ................................................................................. 51
3.2.19 Suspend Power Input ..................................................................................... 52
3.2.20 Internal USB Connectors............................................................................... 53

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3.3 EXTERNAL INTERFACE CONNECTORS....................................................................... 54
3.3.1 External Interface Connector Overview .......................................................... 54
3.3.2 USB Combo Port.............................................................................................. 54
3.3.3 Ethernet Connector.......................................................................................... 55
3.3.4 Serial Communications COM 1 and COM2 Connector .................................. 56
3.3.5 VGA Connector ................................................................................................ 57
4INSTALLATION AND CONFIGURATION ....................................................... 59
4.1 ANTI-STATIC PRECAUTIONS...................................................................................... 60
4.2 INSTALLATION CONSIDERATIONS ............................................................................. 60
4.2.1 Installation Notices .......................................................................................... 60
4.3 UNPACKING.............................................................................................................. 61
4.3.1 Unpacking Precautions.................................................................................... 61
4.3.2 Checklist........................................................................................................... 62
4.4 WAFER-GX MOTHERBOARD INSTALLATION .......................................................... 62
4.4.1 DIMM Module Installation .............................................................................. 63
4.4.1.1 Purchasing the Memory Module............................................................... 63
4.4.1.2 DIMM Module Installation....................................................................... 63
4.5 JUMPER SETTINGS.................................................................................................... 64
4.5.1 Clear CMOS Jumper........................................................................................ 65
4.5.2 AT Power Select Jumper Settings..................................................................... 67
4.5.3 RS-422/485 Serial Port Select ......................................................................... 68
4.5.4 COM 1/2 Port RI and Voltage Select (OPTIONAL) ........................................ 69
4.5.5 LCD Voltage Selection ..................................................................................... 70
4.5.6 CRT/LCD Mode Selection................................................................................ 71
4.6 CHASSIS INSTALLATION ........................................................................................... 72
4.6.1 Chassis selection.............................................................................................. 73
4.6.2 Install the CompactFlash card......................................................................... 73
4.6.3 Install the RS-232/422/485 Cable.................................................................... 74
4.6.4 IDE Disk Drive Connector............................................................................... 75
4.6.5 SATA Drive Connection ................................................................................... 76
4.7 REAR PANEL CONNECTORS ...................................................................................... 77
4.7.1 LCD Panel Connection .................................................................................... 77
4.7.2 Ethernet Connection ........................................................................................ 77
4.7.3 USB Connection............................................................................................... 78

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4.7.4 Keyboard and Mouse Connection.................................................................... 78
5AWARD BIOS SETUP ........................................................................................... 79
5.1 INTRODUCTION ........................................................................................................ 80
5.1.1 Starting Setup ................................................................................................... 80
5.1.2 Using Setup ...................................................................................................... 80
5.1.3 Getting Help..................................................................................................... 81
5.1.4 Unable to Reboot After Configuration Changes.............................................. 81
5.1.5 Main BIOS Menu ............................................................................................. 81
5.2 STANDARD CMOS FEATURES.................................................................................. 84
5.2.1 IDE Primary Master/Slave .............................................................................. 86
5.3 ADVANCED BIOS FEATURES.................................................................................... 89
5.4 ADVANCED CHIPSET FEATURES................................................................................ 97
5.4.1 Flat Panel Configuration............................................................................... 100
5.5 INTEGRATED PERIPHERALS .................................................................................... 103
5.5.1 IT8888 ISA Decode IO....................................................................................110
5.5.2 IT8888 ISA Decode Memory...........................................................................113
5.6 POWER MANAGEMENT SETUP.................................................................................115
5.6.1 Power Management ........................................................................................118
5.7 PNP/PCI CONFIGURATIONS ................................................................................... 120
5.8 PC HEALTH STATUS ............................................................................................... 125
6SOFTWARE DRIVERS ....................................................................................... 127
6.1 A
VAILABLE SOFTWARE DRIVERS ............................................................................ 128
6.2 VGA DRIVER......................................................................................................... 130
6.3 AUDIO DRIVER INSTALLATION ............................................................................... 139
6.4 LAN DRIVER ......................................................................................................... 144
6.5 SATA/RAID DRIVER............................................................................................. 148
6.6 ISA DRIVER ........................................................................................................... 153
ABIOS OPTIONS .................................................................................................... 161
BDIO CONNECTOR .............................................................................................. 167
B.1 DIO INTERFACE INTRODUCTION ........................................................................... 168
B.2 DIO CONNECTOR PINOUTS ................................................................................... 168
B.3 ASSEMBLY LANGUAGE SAMPLES........................................................................... 169

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B.3.1 Enable the DIO Input Function..................................................................... 169
B.3.2 Enable the DIO Output Function .................................................................. 169
CWATCHDOG TIMER .......................................................................................... 171
DADDRESS MAPPING.......................................................................................... 175
D.1 ADDRESS MAP ...................................................................................................... 176
D.2 1ST MB MEMORY ADDRESS MAP ......................................................................... 176
D.3 IRQ MAPPING TABLE............................................................................................ 177
D.4 DMA CHANNEL ASSIGNMENTS............................................................................. 177
EEXTERNAL AC’97 AUDIO CODEC ................................................................. 179
E.1 INTRODUCTION ...................................................................................................... 180
E.1.1 Accessing the AC’97 CODEC ....................................................................... 180
E.1.2 Driver Installation ......................................................................................... 180
E.2 SOUND EFFECT CONFIGURATION ........................................................................... 181
E.2.1 Accessing the Sound Effects Manager........................................................... 181
E.2.2 Sound Effect Manager Configuration Options.............................................. 182
FALI RAID .............................................................................................................. 185
F.1 INTRODUCTION ...................................................................................................... 186
F.1.1 Precautions .................................................................................................... 186
F.2 FEATURES AND BENEFITS ....................................................................................... 187
F.3 ACCESSING THE ALI RAID UTILITY ...................................................................... 187
F.4 RAID OPTIONS:..................................................................................................... 189
F.4.1 Create RAID 0 Striping for Performance ...................................................... 189
F.4.2 Create RAID 1 Mirroring for Reliability ....................................................... 191
F.4.3 Create JBOD for Integrated Capacity ........................................................... 192
F.4.4 Stripe Size....................................................................................................... 194
F.4.5 Delete RAID Setting & Partition ................................................................... 194
F.4.6 Delete All RAID Setting & Partition.............................................................. 194
F.4.7 Rebuild RAID Array....................................................................................... 195
F.4.8 Select Boot Drive ........................................................................................... 195
INDEX............................................................................................................................ 197

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List of Figures
Figure 1-1: WAFER-GX Overview ................................................................................4
Figure 1-2: WAFER-GX Solder Side Overview ...........................................................5
Figure 2-1: WAFER-GX Dimensions (mm)................................................................10
Figure 2-2: External Interface Panel Dimensions (mm)...........................................11
Figure 2-3: Data Flow Block Diagram........................................................................13
Figure 3-1: Connector and Jumper Locations .........................................................24
Figure 3-3: Connector and Jumper Locations (Solder Side)..................................25
Figure 3-4: AT Power Connector Location ...............................................................28
Figure 3-5: ATX Power Connector Location.............................................................29
Figure 3-6: Audio Connector Location......................................................................30
Figure 3-7: CompactFlash Connector Location.......................................................31
Figure 3-8: DIO Connector Connector Locations ....................................................33
Figure 3-9: Fan Connector Location .........................................................................34
Figure 3-10: Primary IDE Device Connector Locations...........................................35
Figure 3-11: Inverter Connector Location ................................................................36
Figure 3-12: Keyboard Connector Location .............................................................37
Figure 3-13: LED Connector Location.......................................................................38
Figure 3-14: LCD LVDS Connector Locations..........................................................40
Figure 3-15: LCD TTL Connector Pinout Locations ................................................42
Figure 3-16: Parallel Port Connector Location.........................................................44
Figure 3-17: PC/104 Slot Location .............................................................................46
Figure 3-18: Power Switch Connector Locations ....................................................48
Figure 3-19: Reset Button Connector Locations .....................................................49
Figure 3-20: RS-232 Serial Port Connector Locations ............................................50
Figure 3-21: SATA Drive Connector Locations........................................................51
Figure 3-22: Suspend Power Connector Location...................................................52
Figure 3-23: USB Connector Pinout Locations........................................................53

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Figure 3-24: WAFER-GX On-board External Interface Connectors .......................54
Figure 3-25: J7 Connector..........................................................................................56
Figure 3-26: COM1 Pinout Locations ........................................................................57
Figure 3-27: VGA1 Connector ....................................................................................58
Figure 4-1: SO-DIMM Module Installation .................................................................64
Figure 4-2: Clear CMOS Connector ...........................................................................66
Figure 4-3: AT/ATX Mode Select Jumper..................................................................67
Figure 4-4: Serial Port Mode Select Jumper Pinout Locations ..............................68
Figure 4-5: COM 1/2 Port RI and Voltage Select Jumper Pinout Locations..........70
Figure 4-6: LVDS Voltage Selection Jumper Pinout Locations..............................71
Figure 4-7: CRT/LCD Mode Selection Jumper Settings ..........................................72
Figure 4-8: CompactFlash Card Installation.............................................................74
Figure 4-9: IDE Cable Connection .............................................................................75
Figure 4-10: SATA Drive Cable Connection .............................................................76
Figure 4-11: SATA Drive Connection ........................................................................77
Figure 6-1: AMD LX/GX CD Main Menu.................................................................. 129
Figure 6-2: AMD LX/GX CD Driver Menu................................................................ 130
Figure 6-3: Access Windows Control Panel.......................................................... 131
Figure 6-4: Double Click the System Icon ............................................................. 132
Figure 6-5: Double Click the Device Manager Tab................................................ 132
Figure 6-6: Device Manager List ............................................................................. 133
Figure 6-7: Expand the Display Adapters Category ............................................. 134
Figure 6-8: Update Driver ........................................................................................ 135
Figure 6-9: Upgrade Device Driver Wizard ............................................................ 136
Figure 6-10: Search for Suitable Driver.................................................................. 137
Figure 6-11: Locate Driver Files.............................................................................. 138
Figure 6-12: Location Browsing Window............................................................... 138
Figure 6-13: Access Windows Control Panel........................................................ 139
Figure 6-14: Double Click the System Icon ........................................................... 140
Figure 6-15: Double Click the Device Manager Tab.............................................. 140
Figure 6-16: Device Manager List ........................................................................... 141
Figure 6-17: Search for Suitable Driver.................................................................. 142

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Figure 6-18: Locate Driver Files.............................................................................. 143
Figure 6-19: Location Browsing Window............................................................... 144
Figure 6-20: Locate the Setup Program Icon ........................................................ 145
Figure 6-21: Preparing Setup Screen..................................................................... 145
Figure 6-22: Install Wizard Welcome Screen......................................................... 146
Figure 6-23: Installing Screen ................................................................................. 147
Figure 6-24: Restart the Computer ......................................................................... 148
Figure 6-25: Locate the Setup Program Icon ........................................................ 149
Figure 6-26: Preparing Setup Screen..................................................................... 149
Figure 6-27: Install Wizard Welcome Screen......................................................... 150
Figure 6-28: Installing Screen ................................................................................. 151
Figure 6-29: RAID Driver Digital Signal.................................................................. 152
Figure 6-30: InstallShield Wizard Complete Screen ............................................. 153
Figure 6-31: Access Windows Control Panel........................................................ 154
Figure 6-32: Double Click the System Icon ........................................................... 155
Figure 6-33: Double Click the Device Manager Tab.............................................. 156
Figure 6-34: Device Manager List ........................................................................... 157
Figure 6-35: Search for Suitable Driver.................................................................. 158
Figure 6-36: Locate Driver Files.............................................................................. 159
Figure 6-37: Location Browsing Window............................................................... 160

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List of Tables
Table 1-1: WAFER-GX Model Specifications..............................................................2
Table 1-2: Technical Specifications ............................................................................8
Table 2-1: Geode GX Graphics Features ..................................................................15
Table 2-2: Power Consumption .................................................................................20
Table 3-1: Onboard Peripheral Connectors..............................................................26
Table 3-2: Rear Panel Connectors.............................................................................27
Table 3-3: Onboard Jumpers .....................................................................................27
Table 3-4: AT Power Connector Pinouts ..................................................................28
Table 3-5: ATX Power Connector Pinouts ................................................................29
Table 3-6: Audio Connector Pinouts.........................................................................30
Table 3-7: CompactFlash Connector Pinouts ..........................................................32
Table 3-8: DIO Connector Connector Pinouts..........................................................33
Table 3-9: Fan Connector Pinouts.............................................................................34
Table 3-10: Primary IDE Connector Pinouts.............................................................36
Table 3-11: Inverter Power Connector Pinouts ........................................................37
Table 3-12: Keyboard Connector Pinouts ................................................................38
Table 3-13: LED Connector Pinouts ..........................................................................39
Table 3-14: LCD LVDS Connector Pinouts ...............................................................41
Table 3-15: TFT LCD TTL Port Connector Pinouts ..................................................43
Table 3-16: Parallel Port Connector Pinouts ............................................................44
Table 3-17: PC/104 Slot Connector Pinouts .............................................................48
Table 3-18: Power Switch Connector Pinouts..........................................................49
Table 3-19: Reset Button Connector Pinouts...........................................................50
Table 3-20: RS-232/422/485 Serial Port Connector Pinouts....................................51
Table 3-21: SATA Drive Connector Pinouts .............................................................52
Table 3-22: Suspend Power Connector Pinouts ......................................................53
Table 3-23: USB Port Connector Pinouts .................................................................54

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Table 3-24: J6 Connector Pinouts .............................................................................55
Table 3-25: J7 Connector Pinouts .............................................................................55
Table 3-26: J7 Connector LEDs .................................................................................56
Table 3-27: COM1 Pinouts..........................................................................................57
Table 3-28: VGA1 Connector Pinouts .......................................................................58
Table 4-1: Jumpers ....................................................................................................65
Table 4-2: Clear CMOS Jumper Settings ..................................................................66
Table 4-3: AT Power Select Jumper Settings...........................................................67
Table 4-4: Serial Port Mode Select Jumper Settings ...............................................68
Table 4-5: COM 1/2 Port RI and Voltage Select Jumper Settings...........................69
Table 4-6: LVDS Voltage Selection Jumper Settings ..............................................71
Table 4-7: CRT/LCD Mode Selection Jumper Settings............................................72
Table 4-8: IEI Provided Cables...................................................................................73
Table 5-1: BIOS Navigation Keys...............................................................................81

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BIOS Menus
BIOS Menu 1: Award BIOS CMOS Setup Utility .......................................................82
BIOS Menu 2: Standard CMOS Features ..................................................................84
BIOS Menu 3: IDE Channel Master ............................................................................87
BIOS Menu 4: Advanced BIOS Features...................................................................90
BIOS Menu 5: Advanced Chipset Features ..............................................................98
BIOS Menu 6: Flat Panel Configuration ................................................................. 100
BIOS Menu 7: Integrated Peripherals..................................................................... 103
BIOS Menu 8: IT8888 ISA Decode IO...................................................................... 111
BIOS Menu 9: IT8888 ISA Decode Memory............................................................ 114
BIOS Menu 10: Power Management Setup............................................................ 116
BIOS Menu 11: IRQ Wakeup Events....................................................................... 119
BIOS Menu 12: PnP/PCI Configurations ................................................................ 120
BIOS Menu 13: IRQ Resources ............................................................................... 122
BIOS Menu 14: Memory Resources........................................................................ 123
BIOS Menu 15: PC Health Status............................................................................ 125

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Glossary
AC ’97 Audio Codec 97
ACPI Advanced Configuration and
Power Interface
APM Advanced Power Management
ARMD ATAPI Removable Media Device
ASKIR Shift Keyed Infrared
ATA Advanced Technology
Attachments
BIOS Basic Input/Output System
CFII Compact Flash Type 2
CMOS Complementary Metal Oxide
Semiconductor
CPU Central Processing Unit
Codec Compressor/Decompressor
COM Serial Port
DAC Digital to Analog Converter
DDR Double Data Rate
DIMM Dual Inline Memory Module
DIO Digital Input/Output
DMA Direct Memory Access
EIDE Enhanced IDE
EIST Enhanced Intel SpeedStep
Technology
FFIO Flexible File Input/Output
FIFO First In/First Out
FSB Front Side Bus
IrDA Infrared Data Association
HDD Hard Disk Drive
IDE Integrated Data Electronics
I/O Input/Output
ICH4 I/O Controller Hub 4
L1 Cache Level 1 Cache
L2 Cache Level 2 Cache
LCD Liquid Crystal Display
LPT Parallel Port Connector
LVDS Low Voltage Differential Signaling
MAC Media Access Controller
OS Operating System
PCI Peripheral Connect Interface
PIO Programmed Input Output
PnP Plug and Play
POST Power On Self Test
RAM Random Access Memory
SATA Serial ATA
S.M.A.R.T Self Monitoring Analysis and
Reporting Technology
SPD Serial Presence Detect
S/PDI Sony/Philips Digital Interface
SDRAM Synchronous Dynamic Random
Access Memory
SIR Serial Infrared
UART Universal Asynchronous
Receiver-transmitter
USB Universal Serial Bus
VGA Video Graphics Adapter

WAFER-GX
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1 Introduction
Chapter
1

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1.1 WAFER-GX Overview
The 3.5” WAFER-GX AMD Geode GX 466 low power single board computer (SBC) is fully
equipped with advanced multi-mode I/Os. The WAFER-GX is designed for system
manufacturers, integrators, and VARs that want performance, reliability, and quality at a
reasonable price.
1.1.1 WAFER-GX Models
The WAFER-GX series has two models:
 WAFER-GX-466-R10
 WAFER-GX-466S-R10
The specifications for the two models are show in Table 1-1.
WAFER-GX 466-R10 466S-R10
CRT/LCD YES YES
Dual LAN YES YES
USB 2.0 YES YES
SATA Drives NO YES
Audio YES YES
Table 1-1: WAFER-GX Model Specifications
1.1.2 WAFER-GX Applications
The WAFER-GX is designed for applications in the following areas:
 Kiosks and Point of Sales
 Restaurants
 Human Machine Interface (HMI) applications
 Marine, GPS and transportation applications
 Financial, retail and kiosk applications
1.1.3 WAFER-GX Benefits
Some of the WAFER-GX benefits include:

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 Reduced hardware costs
 Reduced software costs
 Reduced maintenance costs
 Client crash prevention
 Central resource control
 Security protection
1.1.4 WAFER-GX Features
Some of the WAFER-GX features are listed below:
 3.5” form factor
 RoHS compliant
 Embedded AMD Geode GX 466 processor
 PC/104 expansion slot
 Dual-independent display functionality
 Two high performance 10/100 megabit Ethernet controllers on-board
 Two SATA channels with transfer rates up to 150MB/s on-board
(WAFER-GX-466S-R10 only)
 Four USB 2.0 devices supported
 Integrated audio

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1.2 WAFER-GX Overview
Figure 1-1: WAFER-GX Overview

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Figure 1-2: WAFER-GX Solder Side Overview
1.2.1 WAFER-GX Connectors
The WAFER-GX has the following connectors onboard:
 1 x AT power input connector
 1 x ATX power input connector
 1 x Audio connector
 1 x Battery connector
 1 x CompactFlash (CF) connector (solder side)
 1 x Digital I/O (DIO) connector
 1 x Fan connector
 1 x IDE interface connectors (44-pin)
 1 x Inverter power connector

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 1 x Keyboard/mouse connector
 1 x LED connector
 1 x LVDS LCD panel connector
 1 x Parallel port connector
 1 x Power button connector
 1 x PC/104 slot
 1 x Reset button connector
 1 x RS-232/422/485 serial port connector
 2 x SATA connectors
 1 x Suspend power input connector
 1 x TFT interface connector
 1 x USB connector
 1 x SO-DIMM socket
The WAFER-GX has the following connectors on the board rear panel:
 2 x Ethernet connectors
 1 x PS/2 Keyboard/mouse connector
 1 x USB connector
 1 x VGA connector
The WAFER-GX has the following onboard jumpers:
 AT/ATX power mode select
 COM1/2 Port RI and voltage selection
 RS-422/485 select
 LCD panel voltage select