Acrosser AR-B1842 User Manual

AR-B1842-G

Socket 479 Pentium® M

INDUSTRIAL GRADE

CPU BOARD

User’ s Guide

Edition: 2.01

Book Number: AR-B1842-07.0115

Table of Contents

0. PREFACE....................................................................................................................................................................3

0.1 COPYRIGHT NOTICE AND DISCLAIMER.....................................................................................................................................3

0.2 WELCOME TO THE AR-B1842-G CPU BOARD............................................................................................................................3

0.3 BEFORE YOU USE THIS GUIDE...................................................................................................................................................3

0.4 RETURNING YOUR BOARD FOR SERVICE.................................................................................................................................3

0.5 TECHNICAL SUPPORT AND USER COMMENTS........................................................................................................................3

0.6 STATIC ELECTRICITY PRECAUTIONS ........................................................................................................................................4

1. INTRODUCTION..........................................................................................................................................................5

1.1 PACKING LIST................................................................................................................................................................................5

1.2 SPECIFICATIONS...........................................................................................................................................................................6

1.3 BLOCK DIAGRAM...........................................................................................................................................................................7

2. INSTALLATION........................................................................................................................................................... 8

2.1 AR-B1842-G'S BOARD DIMENSIONS ...........................................................................................................................................8

2.2 CPU INSTALLATION ......................................................................................................................................................................9

2.3 MEMORY INSTALLATION (DDR2 SODIMM MEMORY SIZE) ....................................................................................................10

2.4 POWER INSTALLATION ..............................................................................................................................................................10

3. CONNECTION........................................................................................................................................................... 11

3.1 PS/2 KEYBOARD & MOUSE（CN1）.......................................................................................................................................11

3.2 KEYBOARD & MOUSE HEADER (J6)..........................................................................................................................................11

3.3 KEYBOARD LUCK/UNLCK HEADER (JP5).................................................................................................................................11

3.4 SERIAL PORT CONNECTOR（COM1） .....................................................................................................................................11

3.5 INTERNAL SERIAL PORT HEADER （COM2） ........................................................................................................................11

3.6 COM2 FOR RS232 / RS422 / RS485 SELECT （JP3） .............................................................................................................12

3.7 RS422 / RS485 HEADER（J8）...................................................................................................................................................12

3.8 IRDA HEADER（J4） ................................................................................................................................................................12

3.9 VGA CONNECTOR（VGA1）......................................................................................................................................................12

3.10 ETHERNET RJ-45 CONNECTOR（LAN1） ..............................................................................................................................12

3.11 PARALLEL PORT HEADER（J2） ............................................................................................................................................13

3.12 CPU FREQUENCY SELECT TABLE (J10） ..............................................................................................................................13

3.13 HARD DISK CONNECTOR (IDE1) .............................................................................................................................................13

3.14 COMPACT FLASH CONNECTOR（CF1）................................................................................................................................14

3.15 COMPACT FLASH CONNECTOR MASTER∕SLAVE SELECT HEADER（JP6） ..................................................................14

3.16 AUDIO LINE IN / LINE OUT / MIC HEADER （AUDIO1） ........................................................................................................14

3.17 CD IN HEADER（J1）................................................................................................................................................................15

3.18 CPU FAN POWER CONNECTOR（FAN1, FAN2） ..................................................................................................................15

3.19 COMS BATTERY HEADER（JP4）...........................................................................................................................................15

3.20 18, 24 BITS LVDS CONNECTOR（LCD1） ..............................................................................................................................15

3.21 LVDS INTERVER CONNECTOR（LCDPW1）..........................................................................................................................15

3.22 USB PORT HEADER （USB1, USB2） ....................................................................................................................................16

3.23 DDR2 SOCKET（DDR2SODIMM1） .........................................................................................................................................16

3.24 MINI PCI SLOT（MINIPCI1）.....................................................................................................................................................16

3.25 SATA CONNECTOR（SATA1, SATA2）...................................................................................................................................16

3.26 GPIO PORT HEADER（J9）......................................................................................................................................................16

3.27 CPU VOLTAGE SELECT HEADER（JP1） ..............................................................................................................................16

3.28 PROTECT U HEADER（JP2） ..................................................................................................................................................17

3.29 PANEL HEADER（J3）..............................................................................................................................................................17

3.30 AT POWER CONNECTOR（PW1） ..........................................................................................................................................17

4. WATCHDOG TIMER CONFIGURATION..................................................................................................................18

4.1 WATCHDOG TIMER SETTING ....................................................................................................................................................18

5. BIOS CONSOLE........................................................................................................................................................20

5.1 MAIN SETUP.................................................................................................................................................................................20

5.2 ADVANCED CHIPSET SETUP.....................................................................................................................................................22

5.3 POWER SETUP............................................................................................................................................................................23

5.4 PERIPHERALS SETUP ................................................................................................................................................................24

5.5 PNP/PCI SETUP...........................................................................................................................................................................26

5.6 PC HEALTH SETUP .....................................................................................................................................................................27

5.7 BOOT SETUP ...............................................................................................................................................................................28

5.8 EXIT SETUP..................................................................................................................................................................................29

5.9 BIOS UPDATE ..............................................................................................................................................................................30

APPENDIX A. ADDRESS MAPPING............................................................................................................................ 31

IO ADDRESS MAP..............................................................................................................................................................................31

APPENDIX B. INTERRUPT REQUEST (IRQ)............................................................................................................... 32

2

0. PREFACE

0.1 COPYRIGHT NOTICE AND DISCLAIMER

This document is copyrighted, 2006, by Acrosser Technology Co., Ltd. All rights are reserved. No part
of this manual may be reproduced, copied, transcribed, stored in a retrieval system, or translated into
any language or computer language in any form or by any means, such as electronic, mechanical,
magnetic, optical, chemical, manual or other means without the prior written permission or original
manufacturer.
Acrosser Technology assumes no responsibility or warranty with respect to the content in this manual
and specifically disclaims any implied warranty of merchantability or fitness for any particular purpose.
Furthermore, Acrosser Technology reserves the right to make improvements to the products described
in this manual at any times without notice. Such revisions will be posted on the Internet

(WWW.ACROSSER.COM)

Possession, use, or copy of the software described in this publication is authorized only pursuant to
valid written license from Acrosser or an authorized sub licensor.
ACKNOWLEDGEMENTS
Acrosser, AMI, IBM PC/AT, ALI, Windows 3.1, MS-DOS…are registered trademarks.

All other trademarks and registered trademarks are the property of their respective owners.

0.2 WELCOME TO THE AR-B1842-G CPU BOARD

This guide introduces the Acrosser AR-B1842-G CPU Board.
Use information provided in this manual describes this card’s functions and features. It also helps you
start, set up and operate your AR-B1842-G. General system information can also be found in this
publication.

0.3 BEFORE YOU USE THIS GUIDE

Please refer to the Chapter 3, “Setting System,” in this guide, if you have not already installed this
AR-B1842-G. Check the packing list before you install and make sure the accessories are completely
included.
AR-B1842-G CD provides the newest information regarding the CPU card. Please refer to the files of
the enclosed utility CD. It contains the modification and hardware & software information, and adding
the description or modification of product function after manual printed.

0.4 RETURNING YOUR BOARD FOR SERVICE

If your board requires any services, contact the distributor or sales representative from whom you
purchased the product for service information. If you need to ship your board to us for service, be sure
it is packed in a protective carton. We recomm end that you keep the original shipping container for this
purpose.
You can help assure efficient servicing for your product by following these guidelines:

1. Include your name, address, daytime telephone, facsimile number and E-mail.

2. A description of the system configuration and/or software at the time of malfunction.

3. A brief description of the problem occurred.

0.5 TECHNICAL SUPPORT AND USER COMMENTS

Users comments are always welcome as they assist us in improving the quality of our product s and the
readability of our publications. They create a very important part of the input used for product
enhancement and revision.
We may use and distribute any of the information you provide in any way appropriate without incurring
any obligation. You may , of course, continue to use the information you provide.
If you have any suggestions for improving particular sections or if you find any errors on it, please send
your comments to Acrosser Technology Co., Ltd. or your local sales representative and indicate the
manual title and book number.
Internet electronic mail to: [e-mail]

[e-mail]

as soon as possible.

3

0.6 STATIC ELECTRICITY PRECAUTIONS

Before removing the board from its anti-static bag, read this section about static electri city precautions.
Static electricity is a constant danger to computer systems. The charge that can build up in your body
may be more than sufficient to damage integrated ci rcuits on any PC board. It is, therefore, important to
observe basic precautions whenever you use or handle computer components. Although areas with
humid climates are much less prone to static build-up, it is always best to safeguard against accidents
that may result in expensive repairs. The following measures should be sufficient to protect your
equipment from static discharge:
 Touch a grounded metal object to discharge the static electricity in your body (or ideally, wear a

grounded wrist strap).

 When unpacking and handling the board or other system components, place all materials on an

anti-static surface.

 Be careful not to touch the components on the board, especi ally the “golden finger” connectors on

the bottom of the board.

4

1. INTRODUCTION

Welcome to the AR-B1842-G Embedded AT/ATX Single Board Computer. The AR-B1842-G Pentium®
M embedded board incorporates the Intel
600MHz to 2.0MHz in 478-ball Micro-FCBGA package with a front side bus of 400/533MHz.

Graphics display functionality is provided by Build-in Intel Graphics Media Accelerator(GMA) that
supports CRT display and LVDS interface with 2X18-bit panel specifications. Ethernet connectivity
comes from the ICH6M-integrated Ethernet 10/100 Ethernet controller.

One DDR II SO-DIMM sockets supports up to 1GB of memory. Two Serial and two SATA ports are
supported. There is one IDE connectors – IDE1 supporting UDMA33/66/100 while supporting a CF
Type II socket for its slave channel.

Other I/O features include four USB ports connector with pin headers. Expansion slots composed of
one Mini PCI slot. AR-B1842-G uses a 20-pin ATX power and a big 4-pin AT input connector.

1.1 PACKING LIST

In addition to this User's Manual, the AR-B1842-G package includes the following items:

 The quick setup manual
 1 AR-B1842-G CPU board
 1 Software utility CD
 1 5.25” IDE HDD ATA 100Cable
 1 Audio interface Cable
 1 Serial port Cable
 1 Print port Cable
 1 PS2 to PS2 Y Cable
 1 JST to PS2 Y Cable（optional）

 1 USB ports on one bracket Cable
 1 SATA cable

®

advanced 915GME Chipset that supports processors from

5

1.2 SPECIFICATIONS

Model Name  AR-B1842-G V 2.0
Product
Descriptions

General Note

CPU Grade Socket 478 FSB533/400 MHz Pentium M/ Celeron M (90nm

CPU Fan Slim Cooling Fan with on board fan power connector
BIOS AWARD
System Chipsets  Intel 915GME + ICH6M
System Memory  DDR2 SDRAM SO-DIMM socket x1

 Maximum up to 1GB
Watchdog Timer Software programmable 1~63 Seconds
Battery Lithium Battery, 3V 220mAH
Power
Requirements
Hardware
monitoring

OS DOS, WinCE, Linux Fedora 2.6.4/Redhat 2.4.x and above, Win

Video

Video Interface Build-in Intel Graphics Media Accelerator(GMA)

CRT 1 x VGA port D-Sub15
LVDS 18-bits LVDS Interface

Audio

Audio Interface AC97 Codec, Realtek ALC 655, Line out

Storage

IDE 1 x 40 pin IDE connector supports Ultra DMA 2x20x2.54mm
SSD 1 x Compact Flash support UDMA

SATA 2 x SATA connectors

Network Interface

Ethernet 1 x Intel 82562EZ (10/100 Mbps)

I/O

Super I/O

Serial Port
Parallel Port On board 1 x 26 pin head for LPT1, support SPP/EPP/ECP

GPIO 8 bit independent I/O Lines, TTL level Pin Header
USB 4 x USB 2.0 Pin Header
IrDA 1 x 4 x 2.5mm pin head (SIR mode) Pin Header
Audio Line out (L/R Channel) Pin Head
Expansion slot 1 x Mini PCI slot Slot
Keyboard
Mouse
Buzzer

Mechanical

Dimension 167mm x 121mm

 AT/ATX

 Need independent 5V/12V input by 2x5 pin connector

1. CPU voltage

2. CPU Temperature

3. Voltage Monitoring

PCI-E Half Size Pentium M CPU card with Intel 915GME chipset, VGA, 10/100 LAN,
CF, Mini PCI, 2 Serial ports, 4 USB 2.0

and 130nm)

Big 4 pin

BIOS Support

2000/XP, XPe

DF13

LCD inverter power connector and ON/OFF control Support

3.3V

Socket upward and CF surface with PCB Edge

Support PXE function boot from LAN and Wake on LAN

Winbond 83627EHG
COM1 on board DB-9 (RS-232)

COM2 2 x10 pin head support RS-232/422/485

modes

1 x PS/2 for Keyboard and Mouse Mini Din

L/R Channel

Type-II
Socket

RJ-45
connector

DB-9
Pin Header
Pin header

Pin head

6

Operating
Temperature
Storage
Temperature
Relative Humidity 0 to 90% @ 45°C, non-condensing

EMC & Safety

EMC CE , FCC Class A
Safety N/A

1.3 BLOCK DIAGRAM

IMVP_IV

LVDS DUAL CH

CRT D-type CONN

TV OUT

PCI-E 16X
Golden
Finger

PCI-E 8X Golden
Finger (1X4)

USB 4 Port

4 port with pin header

UDMA (40PIN/2.5mm)
& CF Card

Serial ATA x2

R,G,B (10)

PCI-E Bus(3)

PCI-E Bus(3)

USB 2.0 (8)

SATA BUS(5)

0~60oC (32~140oF)

-20~80oC (-4~176oF)

FSB 133 Mhz core clock

LVDS (9)

HUB LINK(4)

(each direction 1GB/s)

Express port

(*1)x4

USB2.0(8)

ATA100(1)

SATA(2)

Dothan Processor

2M Cache

478 uFCPGA

(533Mhz)*(8byte)=4.2GB/s

HOST BUS(1)

GMCH Alviso

915GM

1257 PCBGA

4 Lanes

DMI(direction media interface)

2 GB/s point-to-point DMI to ICH6

PCI Bus(6)

ICH6M

FW82801FBM

609 BGA

533 MT/s(133Mhz core clock)

2005/09/21

single 1GB
non-ECC

DDR2 BUS(2)

DDR2 533/400

(533Mhz)*(16byte)=8.5GB/s

(400Mhz)*(16byte)=6.4GB/s

LAN PHY(6)

10/100 M LAN

CHANNEL A

DDR2 SDRAM SO-DIMM X 1

Mini PCI Slot

Intel U21
82562ET

LAN Diff(7)

LAN1
RJ45

AC97 codec ALC655

(Line-out,Line-in,Mic.)

LPC
FWH
Bios

8 bits GPI/O

PRINTER Port

( pin header)

AC'97/Azalia

LPC/IF

Game port

LPC
W83627EHF
Super I/O

DEF:4eh

7

Com1(RS232),
Com2(RS232)

IrDA X1

( 9pin Connector )
( pin header)

( pin header)

PS/2 KB/MS D-type

2. INSTALLATION

This chapter describes how to install the AR-B1842-G. At first, the layout of AR-B1842-G is shown, and
the unpacking information that you should be careful is described. The jumpers and switches setting for
the AR-B1842-G’s configuration are as below.

2.1 AR-B1842-G'S BOARD DIMENSIONS

8

2.2 CPU INSTALLATION

The AR-B1842-G embedded board supports a Socket 478 processor socket for Intel

Celeron

®

M processors.

®

Pentium® M or

The processor socket comes with a screw to secure the processor. As shown in the left picture below,

loosen the screw first before inserting the processor. Place the processor into the socket by making sure
the notch on the corner of the CPU corresponds with the notch on the inside of the socket. Once the
processor has slide into the socket, fasten the screw. Refer to the figures below.

After you have installed the processor into the socket, check if the jumpers for the CPU type and speed are correct.

9

2.3 MEMORY INSTALLATION (DDR2 SODIMM MEMORY SIZE)

The AR-B1842-G board supports DDR2 400/533 MHz main memory. One 200-pin SODIMM connector on the
board supports unbufferedm nonECC, single and double-side DDR 2 400/533 MHz SODIMMs. These SODIMMs
provide the ability to use up to maximum of 1 GBytes system memory.

To install the DDR2 modules, locate the memory slot on the em bedded board and perform the following
steps:

1. Hold the DDR2 module so that the key of the DDR2 module align with those on the memory slot.

2. Gently push the DDR2 module in an upright position until the clips of the slot close to hold the DDR2
module in place when the DDR2 module touches the bottom of the slot.

3. To remove the DDR2 module, press the clips with both hands.

2.4 POWER INSTALLATION

The AR-B1842-G collocates with AR-MB3E-G, because there is no 3.3V power input on AR-B1842-G
board. To install the power of AR-B1842-G, please see the install diagram.

Note: No matter what power input you select (AT or ATX), the big 4-pin power connector always need

+12V, +5V power input.

10

3. CONNECTION

The connectors on AR-B1842-G allows you to connect external devices such as USB devices, serial
port drives, hard disk devices, printers, etc. The following table lists the connectors on AR-B1842-G
and their respective functions.

3.1 PS/2 KEYBOARD & MOUSE（CN1）

PIN SIGNAL PIN SIGNAL

1 KBDAT 2 MSDAT
3 GND 4 +5V

3.2 KEYBOARD & MOUSE HEADER (J6)

3.3 KEYBOARD LUCK/UNLCK HEADER (JP5)

5 KBCLK 6 MSCLK

PIN SIGNAL PIN SIGNAL

1 KBDAT 2 MSDAT
3 GND 4 +5V
5 KBCLK 6 MSCLK

3.4 SERIAL PORT CONNECTOR（COM1）

PIN SIGNAL PIN SIGNAL

1 DCD1 6 DSR1
2 RXD1 7 RTS1
3 TXD1 8 CTS1
4 DTR1 9 RI1
5 GND

3.5 INTERNAL SERIAL PORT HEADER （COM2）

PIN SIGNAL PIN SIGNAL

1 DCD2 2 DSR2
3 RXD2 4 RTS2
5 TXD2 6 CTS2
7 DTR2 8 RI2
9 GND 10 GND

11

3.6 COM2 FOR RS232 / RS422 / RS485 SELECT （JP3）

1 2

PIN SIGNAL

1-2 ON

RS232

（Factory Preset）

65

3-4 ON RS422

5-6 ON RS485

3.7 RS422 / RS485 HEADER（J8）

1 4

PIN SIGNAL

1 TX2+
2 TX2­3 RX2+
4 RX2-

3.8 IRDA HEADER（J4）

1

5

PIN SIGNAL PIN SIGNAL

1 +5V 2 N.C
3 IRRX 4 GND
5 IRTX

3.9 VGA CONNECTOR（VGA1）

PIN SIGNAL PIN SIGNAL

1 RED 9 VCC
2 GREEN 10 GND
3 BLUE 11 N.C.
4 N.C. 12 VGADATA
5 GND 13 HSYNC
6 GND 14 VSYNC
7 GND 15 VGACLK
8 GND

3.10 ETHERNET RJ-45 CONNECTOR（LAN1）

PIN SIGNAL PIN SIGNAL

1 TX+ 2 TX­3 RX+ 4 N.C.
5 N.C. 6 RX­7 N.C. 8 N.C.

12

3.11 PARALLEL PORT HEADER（J2）

PIN SIGNAL PIN SIGNAL

1 STB# 14 AFD#
2 PD0 15 ERROR#
3 PD1 16 INIT#
4 PD2 17 SLIN#
5 PD3 18 GND
6 PD4 19 GND
7 PD5 20 GND
8 PD6 21 GND

9 PD7 22 GND
10 ACK# 23 GND
11 BUSY 24 GND
12 PE 25 GND
13 SLCT 26 N.C.

3.12 CPU FREQUENCY SELECT TABLE（J10）

1
2
5

2
4
6

PIN CPU_HOST_FREQUENCY

4_6,1_3
4_6,3_5

3.13 HARD DISK CONNECTOR (IDE1)

2 40

1 39

PIN SIGNAL PIN SIGNAL

1 /RESET 2 GND
3 PDATA7 4 PDATA8
5 PDATA6 6 PDATA9
7 PDATA5 8 PDATA10

9 PDATA4 10 PDATA11
11 PDATA3 12 PDATA12
13 PDATA2 14 PDATA13
15 PDATA1 16 PDATA14
17 PDATA0 18 PDATA15
19 GND 20 N.C.
21 PDDREQ 22 GND
23 /PDIOW 24 GND
25 /PDIOR 26 GND
27 PIORDY 28 GND
29 /PDDACK 30 GND
31 IRQ14 32 N.C.
33 PDA1 34 P66DET
35 PDA0 36 PDA2
37 /PDCS1 38 /PDCS3
39 HDDLED 40 GND

100MHz【BANIAS】

133MHz【DOTHAN】

13

3.14 COMPACT FLASH CONNECTOR（CF1）

PIN SIGNAL PIN SIGNAL

1 GND 2 PDATA3
3 PDATA4 4 SDATA5
5 PDATA6 6 SDATA7
7 /PDCS1 8 GND
9 GND 10 GND

11 GND 12 GND

50 1

NOTE: Compact flash (CF1) and IDE1 share the same IDE
channel. Since a compact flash card is installed, the IDE
device will become unstable. CF card and IDE1 cannot use at
the same time.

13 +5V 14 GND
15 GND 16 GND
17 GND 18 PDA2
19 PDA1 20 PDA0
21 PDATA0 22 PDATA1
23 PDATA2 24 GND
25 GND 26 GND
27 PDATA11 28 PDATA12
29 PDATA13 30 PDATA14
31 PDATA15 32 /PDCS3
33 GND 34 /PDIOR
35 /PDIOW 36 +5V
37 IRQ14 38 +5V
39 M/S

40 N.C.

SELECT
41 /RESET 42 PIORDY
43 N.C. 44 +5V
45 HDDLED 46 N.C.
47 PDATA8 48 PDATA9
49 PDATA10 50 GND

3.15 COMPACT FLASH CONNECTOR MASTER⁄SLAVE SELECT HEADER（JP6）

1

PIN SIGNAL

1-2 ON MASTER MODE

1-2 OFF SLAVE MODE

3.16 AUDIO LINE IN / LINE OUT / MIC HEADER （AUDIO1）

2 14

1

13

PIN SIGNAL PIN SIGNAL

1 MICIN2 2 LIN_L
3 N.C 4 LIN_R
5 +12V 6 VCC
7 LOUT_L 8 MICIN1

9 LOUT_R 10 PCBEEP
11 GND 12 GND
13 GND 14 GND

14

3.17 CD IN HEADER（J1）

1 4

PIN SIGNAL

1 CD-L
2 GND
3 GND
4 CD-R

3.18 CPU FAN POWER CONNECTOR（FAN1, FAN2）

1

PIN SIGNAL

1 GND
2 +12V
3 SENSE

3.19 COMS BATTERY HEADER（JP4）

1

PIN SIGNAL

1-2 ON NORMAL OPERATION

（Factory Preset）

2-3 ON CLEAR CMOS

3.20 18 BITS LVDS CONNECTOR（LCD1）

PIN SIGNAL PIN SIGNAL

1 LVDS_PWR 2 GND
3 LVDS_CLKBN 4 LVDS_CLKBP
5 GND 6 LVDS_YBN2
7 LVDS_YBP2 8 GND

9 LVDS_YBN1 10 LVDS_YBP1
11 N.C. 12 N.C.
13 LVDS_YBP0 14 LVDS_YBN0
15 GND 16 RXOC+
17 LVDS_CLKAN 18 GND
19 LVDS_YAP2 20 LVDS_YAN2
21 DDPCLK 22 LVDS_YAP1
23 LVDS_YAN1 24 DDPDATA
25 LVDS_YAP0 26 LVDS_YAN0
27 N.C. 28 N.C.
29 LVDS_PWR 30 LVDS_PWR

3.21 LVDS INTERVER CONNECTOR（LCDPW1）

PIN SIGNAL PIN SIGNAL

1 +12V 4 LVDS_BKLTEN
2 +12V 5 GND
3 GND 6 LVDS_BKLTCL

15

3.22 USB PORT HEADER （USB1, USB2）

PIN SIGNAL PIN SIGNAL

1 VCC 5 GND
2 DATA- 6 DATA+
3 DATA+ 7 DATA­4 GND 8 VCC

3.23 DDR2 SOCKET（DDR2SODIMM1）

3.24 MINI PCI SLOT（MINIPCI1）

3.25 SATA CONNECTOR（SATA1, SATA2）

PIN SIGNAL PIN SIGNAL
1 GND 5 SATA RXP
2 SATATXP 6 SATARXN

1 7

3 SATATXN 7 GND
4 GND

3.26 GPIO PORT HEADER（J9）

PIN SIGNAL PIN SIGNAL

1 GND 6 OUT0
2 VCC 7 IN 3

3 OUT 3 8 IN 1
4 OUT 1 9 IN 2

5 OUT 2 10 IN 0

3.27 CPU VOLTAGE SELECT HEADER（JP1）

1

PIN SIGNAL

1-2 ON

1-2 OFF

（Factory Preset）

FORFSB133

【DOTHAN】

FOR FSB100

【BANIAS】

16

3.28 PROTECT U HEADER（JP2）

1 3

3.29 PANEL HEADER（J3）

3.30 AT POWER CONNECTOR（PW1）

PIN SIGNAL

1-2 ON WRITER FUNCTION
2-3 ON

PIN SIGNAL

1-2 POWER LED
3-4 HDD LED
5-6 SPEAKER
7-8 RESET BUTTON

9-10 POWER BUTTON

READ FUNCTION

(Factory Preset)

17

4. WATCHDOG TIMER CONFIGURATION

4.1 WATCHDOG TIMER SETTING

The WDT (Watch Dog Timer) is used to generate a variety of output signals after a user programmable
count. The WDT is suitable for use in the prevention of system lock-up, such as when soft ware becomes
trapped in a deadlock. Under these sorts of circumstances, the timer will count to zero and the selected
outputs will be driven. Under normal circumstance, the user will restart the WDT at regular intervals
before the timer counts to zero.

The watchdog timer is a circuit that maybe used from your program software to detect crash or hang up.

The Watchdog timer is automatically disabled after reset. Once you enabled the watchdog timer, your
program should trigger the watchdog timer every time before it times out. After you trigger the watchdog
timer, the timer will be set to zero and start to count again. If your program fails to trigger the watchdog
timer before times out, it will generate a reset pulse to reset the system or trigger the IRQ 9 signal in
order to tell your system that the watchdog time is out.

User could test watchdog function under ‘Debug’ program as follows:

C:>debug

o 4E 87 ;Extended Functions Enable Register

o 4E 87 ;Extended Functions Enable Register

o 4E 07 ;EFIR= EFER (Extended Functions Index Register)
point to Logical Device Number Reg.

o 4F 08 ; Select logical device 8, (Watchdog Function)

o 4E 30 ; Device Active register

o 4F01 ;update CR30 with value 01H

o 4E F6 ; Select Watchdog count mode seconds or minutes

o 4F 08 ;update CRF6 with value 08H ,(8sec reset)

q

18

Sample code as below:

IO_Port_Address = 0x4E;

outportb(IO_Port_Address,0x87); // (EFER) Extended Functions Enable Register

outportb(IO_Port_Address,0x87);

outportb(IO_Port_Address,0x2D); // Point to Global Reg.
// Select Multi-Function pin, (Bit0=0 Watchdog Function)
outportb(IO_Port_Address+1,(inportb(IO_Port_Address+1)&0xFE));

outportb(IO_Port_Address,0x07); // Point to Logical Device Number Reg.
outportb(IO_Port_Address+1,0x08); // Select logical device 8, (Watchdog Function)

outportb(IO_Port_Address,0x30); // Device Active register
outportb(IO_Port_Address+1,0x01);

outportb(IO_Port_Address,0xF5); // Select Watchdog count mode seconds or minutes
outportb(IO_Port_Address+1,Format); // Default is second

outportb(IO_Port_Address,0xF6); // Set Watchdog Timer Value
outportb(IO_Port_Address+1,Time); // 0x00 to disable, max 0xFF

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5. BIOS CONSOLE

This chapter describes the AR-B1842-G BIOS menu displays and explains how to perform common
tasks needed to get up and running, and presents detailed explanations of the elements found in each
of the BIOS menus. The following topics are covered:

 Main Setup
 Advanced Chipset Setup
 Power Setup
 Peripherals Setup
 PnP/PCI Setup
 PC Health Setup
 Boot Setup
 Exit Setup

5.1 MAIN SETUP

The <Main Setup> choice allows you to record some basic hardware configuration in your computer
system and set the system clock and error handling. If the motherboard is already inst alled in a working
system, you will not need to select this option. You will need to run this Setup option, however, if you
change your system hardware configuration, the onboard battery fails, or the configuration stored in the
COMS memory was lost or damaged.

Setup Main Menu

About the button of the menu are the control keys for use on this menu. If you need any help in each
item field, you can press the ＜F1＞ key, It will display the relevant information to help you. The

memory display at the automatically according to the memory changed. The following describes each
item of this menu.

Date Setup

The date format is：

DAY：SUN to SAT

Month：1 to 12
Date：1 to 31

Year：1999 to 2099
To set the date, highlight the “Date” field and use the 【PageUp】/【PageDown】or 【+】/【-】keys to
set the current time.

Time Setup

The time format is：

Hour：0 to 24

Minute：00 to 59

Second：00 to 59
To set the time, highlight the “Time” field and use the 【PageUp】/【PageDown】or 【+】/【-】keys to
set the current time.

IDE Primary HDDs⁄IDE Secondary HDDs

The onboard PCI IDE connectors provide primary and secondary channels for connecting up to four
IDE hard disks or other devices. Each channel can support up to two hard disks; the first is the “Master”
and the second is “Slave”.
Press＜Enter＞ to configure the hard disk. The selections include Auto, Manual, and None. Select
“Manual＂ to define the device information manually. Y ou will be asked to enter the following items.

CYLS：Number of cylinders.

HEAD：Number of read/write heads.
PRECOMP：Write precompensation.
LANDING SONE：Landing zone.
SECTOR：Number of sectors.
The Access Mode selections are as follows：

CHS：（HD<528MB）
LBA：（HD>528MB and support Logical Block Addressing）
Large：（for MS-DOS only）
Auto

Video

The field selects the type of video display card installed in your system. You can choose the following

Video display cards:

EGA/VGA : For EGA, VGA, SEGA, SVGA or PGA monitor adapters. (default)
CGA 40 : Power up in 40 column mode.
CGA 80 : Power up in 80 column mode.
MONO : For Hercules or MDA adapters.

Halt On
The field determines whether or not the system will halt if an error is detected during the power up.

No errors : The system boot will not be halted for any error that may de detected.
All errors : Whenever the BIOS detects a non-fatal error, the system will stop and you will be prompted.

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5.2 ADVANCED CHIPSET SETUP

This section allows you to configure and improve your system and follows you to set up some system
features according to your preference.

Advanced Chipset Setup

APIC Mode

APIC stands for Advanced Programmable Interrupt Controller. The default setting is Disabled.

Quick Power On Self Test
When enabled, this field speeds up the Power On Self Test (POST) after the system is turned on. If it is

set to Enable, BIOS will skip some items.

USB Keyboard Support

The options for this field are “Enabled” and “Disabled”. By default, the field is set to “Disabled”.

PS/2 Mouse Function

The options for this field are “Enabled” and “Disabled”. By default, the field is set to “Disabled”.

Init Display First

The default setting is Onboard/AGP. This determines which VGA controller is initialized when the
system boots.

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5.3 POWER SETUP

Use this main to specify your setting for power management.

Power Setup

ACPI Function

Enable this function to support ACPI (Advance Configuration and Power Interface)

ACPI Suspend Type

This options for this field are S1 (POS) and S3 (STR). By default, the field is set to S1 (POS)

PWRON After PWR-Fail

The field sets the system power status whether on or off when power returns from a power failure.

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5.4 PERIPHERALS SETUP

This option controls the configuration of the board’s chipset. Control keys for this screen are the same
as for the previous screen.

Peripherals Setup

Onboard Serial Port 1
Onboard Serial Port 2
Onboard Serial Port 3
Onboard Serial Port 4
Onboard Serial Port 5
Onboard Serial Port 6

These fields allow you to select the on board serial ports and their addresses. The default values for
these ports are：

Serial Port 1：3F8 / IRQ4
Serial Port 2：2F8 / IRQ3
Serial Port 3：3E8 / IRQ11
Serial Port 4：2E8 / IRQ10
Serial Port 5：4F8 / IRQ11
Serial Port 6：4E8 / IRQ10

Onboard Parallel Port

This field allow you to select the on board parallel port and their addresses. The default values for this
port is：

Parallel Port：378 / IRQ7

Parallel Port Mode

This field allow you determine parallel port mode function：
SSP：Standard Parallel Port
EPP：Enhanced Parallel Port
ECP：Extended Capabilities Port

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USB Controller

The options for this field are Enabled and Disabled. By default, the field is set to Enabled.

USB 2.0 Controller

The options for this field are Enabled and Disabled. By default, the field is set to Enabled. In order to
use USB 2.0, necessary OS drivers must be installed first. Please update your system to Windows
2000 SP4 or Windows XP SP1.

AC97 Audio

The default setting of the AC97 Audio is Auto.

Onboard Lan Controller

The default setting of the Lan controller is Enabled.

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5.5 PNP/PCI SETUP

The option configures the PCI bus system. All PCI bus system on the system use INT#, thus all
installed PCI cards must be set to this value.

PnP / PCI Setup

Reset Configuration Data

Thus field allows you to determine whether to reset the configuration data or not. The default value is
“Disabled”.

Resources Controlled By

This PnP BIOS can configure all of the boot and compatible devices automatically with the use of a use
a PnP operating system such as Windows 95.

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5.6 PC HEALTH SETUP

This section shows the parameters in determining the PC Health Status. These parameters include
temperatures, fan speeds, voltages.

PC Health Status

Temperature / Voltage

These fields are parameters of the hardware monitoring function feature of the motherboard. The
values are read-only values as monitored by the system and show the PC health status.

Shutdown Temperature

This field allows the user to set the temperature by which the system automatically shut do wn once the
threshold temperature is reached. This function can help prevent damage to the system that is caused
by overheating.

5.7 BOOT SETUP

This section is used to exit the BIOS main menu. After making your cha nges, you can either sa ve them
or exit the BIOS menu and without saving the new values

PCI / Plug And Play

First / Second / Third Boot Device

These fields determine the device that the system searches first for an operating system. The option
available include Hard Disk, CDROM, USB-FDD, USB-CDROM and Disable.

Boot Other Device

These fields allow the system to search for an OS from other devices other than the ones selected in
the First / Second / Third Boot Device.

5.8 EXIT SETUP

This section is used to configure exit mode.

Exit Setup

Save & Exit Setup

This option allow you determine whether or not to accept the modifications. If you type “Y”, You will quit
the setup utility and save all changes into the CMOS memory. If you type “N”, you will return to setup
utility.

Load Optimized Defaults

This option allow you to load the default values to your system configuration. These default settings are
optimal and enable all high performance features.

Exit Without Saving

Select this option to exit the Setup utility without saving the changes you have made in this session.
Typing “Y” will quit the Setup utility without saving the modifications. Typing “N” will return to setup
utility.

5.9 BIOS UPDATE

The BIOS program instructions are contained within computer chips called FLASH ROMs that are
located on your system board. The chips can be electronically reprogrammed, allowing you to
upgrade your BIOS firmware without removing and installing chips.
The AR-B1842-G provides the FLASH BIOS update function for you to easily to update to a newer
BIOS version. Please follow these operating steps to update to new BIOS：

Step 1:

Step 2:

Step 3:

Step 4:

Step 5:

Step 6:

Step 7:

Step 8:

Note：

Turn on your system and don’t detect the CONFIG.SYS and AUTOEXEC.BAT files.
You will get AWDFLASH.EXE and XXXXXX.BIN , please copy them to the boot disk .
In the MS-DOS mode, you can type the AWDFLASH and press [ ENTER ] .
A:\>

AWDFLASH

A window will appear and ask you to type the complete BIOS file ( xxxxxx.BIN ) and
press [ ENTER ] .

Then it will ask whether you save the old BIOS file , you can choose the YES or NO .
Then it will ask you whether want to program it , please choose YES .
The BIOS will start to upgrade
When you have successfully flashed the BIOS then press the[F1] to reboot the

Computer and hit [DEL] to enter the BIOS CMOS SETTING . Select " LOAD S-STUP
DEFAULTS " set as YES . Then save and exit the setting

1. In order to prevent your system from hanging up during flashing BIOS , please check the new BIOS
match your model name and current BIOS version .

2. In order to protect your motherboard , please don’t turn off your computer during the flashing or it will
damage your BIOS ROM .

APPENDIX A. ADDRESS MAPPING

IO ADDRESS MAP

Each peripheral device in the system is assigned a set of I/O port addresses which also becomes the
identity of the device. The following table list the I/O addresses used.

I/O MAP ASSIGNMENT
0000 - 000F Direct Memory Access controller
0010 - 001F Motherboard resources
0020 - 0021 Programmable interrupt controller
0022 - 003F Motherboard resources
0040 - 0043 System timer
0044 - 005F Motherboard resources
0060 - 0060 Standard 101/102 – key or Microsoft Natural Kayboard
0061 - 0061 System speaker
0062 - 0063 Motherboard resources
0064 - 0064 Standard 101/102 – key or Microsoft Natural Kayboard
0065 - 006F Motherboard resources
0070 - 0073 System CMOS/real time clock
0074 - 007F Motherboard resources
0080 - 0090 Direct Memory Access controller
0091 - 0093 Motherboard resources
0094 - 009F Direct Memory Access controller

00A0 - 00A1 Programmable interrupt controller
00A2 - 00BF Motherboard resources

00C0 - 00DF Direct Memory Access controller

00E0 - 00EF Motherboard resources
00F0 - 00FF Numeric data processor

0170 - 0177 Secondary IDE Channel

01F0 - 01F7 Primary IDE Channel

0274 - 0277 ISAPNP Read Data Port
0279 - 0279 ISAPNP Read Data Port

02F8 - 02FF Communication Port (COM2)

0376 - 0376 Secondary IDE Channel
0378 - 037F Print Port (LPT1)

03B0 - 03BB Mobile Intel(R) 915GM/GMS, 915GML Express Chipset Family
03C0 - 03DF Mobile Intel(R) 915GM/GMS, 915GML Express Chipset Family

03F6 - 03F6 Primary IDE Channel
03F8 - 03FF Communication Port (COM1)
0400 - 04BF Motherboard resources
04D0 - 04D1 Motherboard resources

0500 - 051F Intel(R) 82801FB/FBM SMBus controller-266A

0778 - 077B Print Port (LPT1)
0A79 - 0A79 ISAPNP Read Data Port

DF00 - DF3F Intel(R) PRO/100 VE Network Connection

F000 - F0FF Realtek AC’97 Audio

F800 - F80F Intel(R) 82801FB/FBM Ultra ATA Storage Controllers – 266F
FA00 - FA3F Realtek AC’97 Audio
FD00 - FD1F Intel(R) 82801FB/FBM USB Universal Host Controller-2659
FE00 - FE1F Intel(R) 82801FB/FBM USB Universal Host Controller-2658

FF00 - FF07 Mobile Intel(R) 915GM/GMS, 915GML Express Chipset Family

APPENDIX B. INTERRUPT REQUEST (IRQ)

Peripheral devices use interrupt request lines to notify CPU for the services required. The following
table shows the IRQ used by the devices on board.

Level HARDWARE USING THE SET TING

00 System timer
01
02
03
04
05
08
09
09
10
11
11 Intel(R) 82801FB/FBM USB Universal Host Controller-2658
11
11
12
13
14
15

Standard 101/102-Key or Microsoft Natural Keyboard
Programmable interrupt controller
Communication Port (COM2)
Communication Port (COM1)
Mobile Intel(R) 915GM/GMS, 915GML Express Chipset Family
System CMOS/real time clock
Microsoft ACPI-Compliant System
Realtek AC’97 Audio
Intel(R) Pro/100 VE Network Connection
Intel(R) 82801FB/FBM SMBus controller-266A

Intel(R) 82801FB/FBM USB Universal Host Controller-2659
Universal Serial Bus (USB) controller
PS/2 Compatible Mouse
Numeric data processor
Primary IDE Channel
Secondary IDE Channel

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