AOpen DX2G Plus Manuel utilisateur

C h a p t e r

System Board

AOpen DX2G Plus System Board 1-1

1.1 Features

The AOpen DX2G Plus is a dual-processor system that supports two

Intel Pentium II/III Xeon processors running at 400/450/500/550 MHz

with possible higher frequencies supported in the future. It integrates

the latest multi-processor and I/O technology in the industry to provide

the best performance for workstation users.

AOpen DX2G Plus has been designed to support Intel latest and

highest performance processor, the Pentium II/III Xeon. Like its

predecessors, the Pentium Pro and Pentium II/III processors, the

Pentium II/III Xeon processor implements a Dynamic Execution micro-

architecture - a unique combination of multiple branch prediction, data

flow analysis, and speculative execution. This means that the

Pentium II/III Xeon can deliver higher performance than the Pentium

processor while maintaining binary compatibility with all previous Intel

Architecture processors. Other than that, the Pentium II/III Xeon

processor is available in 512K, 1MB, and 2MB L2 cache options with

the introduction of the Slot 2 socket. Unlike Pentium II/III processors,

which access the L2 cache at half the processor core speed, the

Pentium II/III Xeon processors access the L2 cache at full processor

core speed. DX2G Plus has the design to leverage this benefit to

process workstation applications with large data sets.

1-2System Guide

AOpen DX2G Plus was designed to support 100MHz front side bus

processors to maximize the performance of Pentium II/III Xeon

processors. It also provides 72-bit PC-100 ECC SDRAM DIMM

support to expand both memory bandwidth and data correction to the

limit. With four DIMM sockets, DX2G Plus supports up to 2GB system

memory which is enough for almost all workstation applications and

even more than most Unix workstations.

Keeping in mind that graphics performance is key for workstation

users, AOpen DX2G Plus supports an AGP 1X/2X graphics port so

the graphical data transmission bandwidth can reach up to 533MB/s,

four times higher than that of traditional PCI VGA transmission. With

DX2G Plus, Acer also provides several leading edge professional

graphics solutions for high-end workstation users.

To eliminate the I/O bottleneck common in traditional workstations,

AOpen DX2G Plus has a built-in dual channel Ultra2 SCSI (Small

Computer System Interface) system. This system enables the

throughput of a single channel SCSI bus to reach 80MB/s. Therefore,

the system throughput can reach 160MB/s, four times higher than the

original single channel Ultra-wide SCSI system. This system

especially helps users with large storage data and heavy access

traffics. AOpen DX2G Plus also supports narrow SCSI devices, like

SCSI tape drives, and DAT, by populating a 50-pin fast SCSI

connector on SCSI channel A.

AOpen DX2G Plus is a highly integrated system which tries to

incorporate all workstation users’needs in one system. Besides the

features introduced above, DX2G Plus also integrates the following

features:

•PCI IDE Interface: For IDE devices to be used in the system. This

interface supports Ultra DMA/33 and LS-120.

•USB (Universal Serial Bus): For users USB devices, if any.

•Two UART NS16C550 serial ports and one enhanced parallel

port with Enhanced Parallel Port (EPP)/Extended Capabilities

Port (ECP) support.

AOpen DX2G Plus System Board 1-3

•10/100 Mb/s LAN: For SOHO (Small Office/Home Office) users

to link with network environments. AOpen DX2G Plus also

supports Wake-On-LAN (WOL) and Intel LDCM (LANDesk Client

Manager) for easy management.

AOpen DX2G Plus supports a power-management function that

conforms to the power-saving standards of the U.S. Environmental

Protection Agency (EPA) Energy Star program. It also offers the

Plug-and-Play feature. This feature saves the user from configuration

troubles, thus making the system more user-friendly. For the default

configuration, DX2G Plus is bundled with AOpen Bonus Pack which

includes on board Lan and SCSI drivers, LDCM Utility, Anti-Virus and

detail manual.

The system is fully compatible with major operating systems in the

industry, like Windows NT, Windows 95/98, Novell Netware, Novell

SFT III, SCO Open Server Unix/UnixWare. AOpen also plans to

support Linux and Solaris when related drivers become available.

1-4System Guide

1.2 Major Components

AOpen DX2G Plus has the following major features:

•Supports dual Intel Pentium II/III Xeon processors running at

400/450/500/550 MHz (and possible higher frequencies) with an

integrated 512K, 1MB or 2MB L2 write-back cache

•Four DIMM sockets that accept 16-, 32-, 64- 128-, 256 and

512MB DIMMs with a maximum of 2048 MB system memory

•One AGP, one ISA, and six PCI bus slots (one PCI and ISA

shared slot)

•512-KB Flash ROM for system BIOS

•System clock/calendar with battery backup

•One 50-pin fast SCSI and two 68-pin Ultra2 SCSI interfaces

•I/O APIC device for SMP interrupt support

•Integrates an enhanced PCI local bus IDE controller

•Intel 440GX chipset supports AGP (Accelerated Graphics Port)

and Ultra DMA/33 functions

•10/100 Mb/s Intel 82558 LAN chip that supports Wake-On-LAN

(WOL)

•IDE hard disk and diskette drive interfaces

•Auxiliary power connector for 337W SPS (Optional) and 350W

ATX power supply

•Super I/O, SCSI, memory and LAN Desk Client Manager (LDCM)

controller chipsets

•External ports:

•USB connectors •PS/2-compatible keyboard port

•RJ-45 jack •PS/2-compatible mouse port

•Parallel port •Serial port 1 and 2

AOpen DX2G Plus System Board 1-5

1.3 Layout

Figure 1-1 shows the system board components.

1 Mouse port

2 Keyboard port

3 Serial port 2

4 Parallel port

5 Serial port 1

6 USB connectors

7 RJ-45 LAN connector

8 LAN controller

9 AGP slot

10 PCI slots

11 ISA slot

12 Intel 82371EB PIIX4E (PCI-

ISA bridge)

13 Intel 21152 (PCI-PCI bridge)

14 Buzzer

15 Adaptec 7896 SCSI controller

16 Battery

17 Feature Connector (supports Intel

SMM cards)

18 System BIOS

19 RDM connectors

20 Channel 2 fast/narrow SCSI

connector (50-pin)

21 Channel 1 Ultra-wide/Ultra-2 SCSI

connector (68-pin)

22 Channel 2 Ultra-wide/Ultra-2 SCSI

connector (68-pin)

23 FDD connector

24 EIDE connector 2 (secondary

channel)

25 EIDE connector 1 (primary

channel)

26 DIMM sockets

27 Intel 443GX system controller

28 AT power connector

29 ATX power connector

30 Acer H90 / IDM(W) power

connectors

31 Slot-2 CPU sockets

Figure 1-1 System Board Layout

3456

1-6System Guide

1.4 Jumpers and Connectors

1.4.1 Jumper and Connector Locations

Figure 1-2 shows the jumper and connector locations on the system

board.

Figure 1-2 System Board Jumper and Connector Locations

Jumpers are prefixed P”. Connectors are

prefixed N”. The blackened pin of a

jumper or connector represents pin 1.

AOpen DX2G Plus System Board 1-7

1.4.2 Jumper Settings

Table 1-1 lists the system board jumpers with their corresponding

settings and functions.

Table 1-1 System Board Jumper Settings

Jumper Setting Function

BIOS Logo

JP3 1-2*

2-3 Logo

OEM

Password Security

JP4 1-2

2-3* Check password

Bypass password

Boot Block Mode

JP5 1-2*

2-3 Disabled

Enabled

Sound Output

JP6 1-2*

2-3 Buzzer

Speaker

AlertPack Select

JP7 1-2/4-5

2-3/5-6* AlertPack and LM80

LM80 Only

*Default

1-8System Guide

1.4.3 Connector Functions

Table 1-2 lists the different connectors on the system board and their

respective functions.

Table 1-2 Connector Functions

Connector Function

CN1 Cabinet Fan Connector

CN3 Mouse (above) and Keyboard (below) Ports

CN4, CN5 Specified Power Supply Connector

CN6 ATX 337W Power Connector (3.3V or 5V)

CN7 AT Power Supply Connector

CN9 Modem Card Ring-in Connector

CN10 Parallel (above), Serial 1(left), and Serial 2 (right)

Ports

CN11 USB Connectors

CN12 CPU1 Fan Connector

CN13 CPU2 Fan Connector

CN14 RJ-45 (LAN) Port

CN15 Fail Report LED Connector

CN16 Cabinet Fan Connector

CN17 Cabinet Fan Connector

CN18 Cabinet Fan Connector

CN20 2 Color Power LED Connector

CN22 Redundant Power Status Connector (not used by

AOpen DX2G Plus)

CN23 CPU1 Temperature Connector

CN24 CPU2 Temperature Connector

CN26 PC-PCI Connector (for Audio Card)

CN27 Primary IDE Connector

CN28 FDD Connector

CN29 SCSI Channel 2 Connector

CN30 Secondary IDE Connector

AOpen DX2G Plus System Board 1-9

Table 1-2 Connector Functions

Connector Function

CN32 SCSI Channel 1 Wide Connector

CN33 SCSI Channel 1 Narrow Connector

CN34 RDM LED Connector (not used by AOpen DX2G

Plus)

CN35 External Speaker Connector

CN36 Hard Disk LED Connector

CN37 Hard Disk LED Connector

CN38 Power Switch Connector

CN39/47 RDM/ASM Module Connector (not used by AOpen

DX2G Plus)

CN40 Wake-on-LAN (WOL) Connector

CN42 3-pin Standby Power Connector

CN43 Hard Disk LED Connector

CN44 Reset Button Connector

CN45 Feature Connector (Intel SMM Card)

CN46 Door Switch Connector

CNX19 I2C Connector

1-10 System Guide

1.5 ESD Precautions

Always observe the following electrostatic discharge (ESD)

precautions before installing a system component:

1. Do not remove a component from its antistatic packaging until

you are ready to install it.

2. Wear a wrist grounding strap before handling electronic

components. Wrist grounding straps are available at most

electronic component stores.

Do not attempt the procedures described in

the following sections unless you are a

qualified technician.

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