Abit SI-1NA User Manual Rev. 2.01

SI-1Na

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(A complete user’s manual is also available

via browsing the Driver & Utilities CD.)

Features & Specifications

CPU

• Supports single Pentium 4 478-pin processor up to

2.8GHz (based on 400MHz FSB)

Chipset



• Intel

• Supports PCI 2.2, Ultra ATA/100 IDE protocol

Memory

• Two 184-pin DIMM sockets support PC1600/PC2100

• Up to 2GB, none ECC memory capacity

LAN

• Intel 82550EY

• Dual 10/100Mbps LAN Ports

• Support IPsec feature

Graphics

• Integrated graphics support featured by 845GL

PCI Extension Slot

• 1 PCI 32bit/33MHz extension slot

845GL chipset Memory Controller Hub (MCH)

(ICH4)

un-buffered low profile memory

• PS/2 keyboard connector

• 2 RJ-45 LAN connectors

System BIOS

• Phoenix/Award Plug and Play BIOS

• 4M-bit Flash ROM

Form Factor

• 9.6” x 9.6”

Miscellaneous

• DOM (Disk On Module) Support

• Hardware monitoring, ACPI, Wake on LAN

• Support both 3.3V and 5V PCI Riser Card

Note: All brand names and trademarks are the property of
their respective owners.

Connectors, Headers, and Jumper

Note: Always power off the computer and unplug the AC
power cord before adding or removing any peripheral or
component. Failing to do so may cause severe damage to
your motherboard and/or peripherals. Plug in the AC
power cord only after you have carefully checked
everything.

4200-0361-02 Rev. 1.01

Storage

• 1 Ultra ATA/100/66/33 IDE channel connector (by

ICH4)

Internal I/O Headers

• 2 USB headers (support 4 USB ports)

• 1 VGA pin header

• 1 COM port pin header (for COM2)

• 1 Parallel port pin header

• ATX12V PSU connector

External I/O Connectors

• 1 VGA connector

• 1 COM port c

onnector (for COM1)

ATXPWR1/ATX12V1 Connector:

• Connects to ATX power supply. (The ATX power

supply unit must meet ATX2.03 specification with
Standard ATX/ATX12v/AUX ATX power
connectors.)

External I/O Panel:

• VGA1: Connects to VGA monitor signal input.

• COM1: Connects to external modem, serial mouse or

other devices that supports this communication
protocol.

• KB1: Connects to a PS/2 keyboard.

• LAN1/LAN2: Connects to Local Area Network.

CCMOS1 Jumper:

• This header uses a jumper to

clear the CMOS memory.
Short pin 2 and pin 3 only
when you want to clear the
CMOS memory. The default
setting is pin 1 and pin 2
shorted for normal operation.

COM2 Header:

• This header provides

connection to external
COM2 bracket through
an extension cable.

FAN1~FAN5 Connectors:

• Connects to 3-leaded

fan connector.

IDE0 Connector:

• Connects to IDE hard

disk, CD-ROM, DOM (Disk On Module) or Zip drive.

J2/J3: DIMM Slots

• Provide slots for installing two 184-pin DDR200 or

DDR266 DIMM modules.

J6: PCI Slot

• This slot provides a 33 MHz/32 bit PCI connection.

JP1: Auto-Reboot Switch

FPIO1 Header:

• Open (default): Automatically reboot the system

when it fails to boot up.

• Close: Disable the automatically reboot function.

LPT1 Header:

• These headers provide connection to the switches and

indicators at font panel.

Pin Description Pin Description

1-2 Power On 11-12 No Connection

3-4 Reset 13-14 LAN1 LED

5-6 No Connection 15-16 LAN2 LED

7-8 Power LED 17-20 No Connection

9-10 IDE0 LED

USB1/USB2 Headers:

• These two headers each provide two USB ports

connection.

• These headers provide connection to external LPT1

bracket through an extension cable.

VGA2 Connector:

• This connector provides an

additional VGA output.

BIOS Setup

When you power the computer on, you will see the

Pin Pin Assignment Pin Pin Assignment

1 VCC 2 VCC

3 Data 0 - 4 Data 1 -

5 Data 0 + 6 Data 1 +

7 Ground 8 Ground

9 NC 10 NC

following message appear briefly at the bottom of the
screen during POST:

PRESS DEL TO ENTER SETUP

If you want to configure the BIOS, you can press the
<Delete> key immediately to enter the BIOS Setup Menu.

Note: Don’t change the parameters inside the BIOS Setup
Menu unless you are thoroughly aware of the BIOS
settings.