VIA Technologies IB781 User manual

IB781
VIA CLE266 Full Size CPU Card
USER’S MANUAL
Version 1.0B

ii IB781 User’s Manual
Acknowledgments
Award is a registered trademark of Award Software International,
Inc.
PS/2 is a trademark of International Business Machines
Corporation.
Microsoft Windows is a registered trademark of Microsoft
Corporation.
Winbond is a registered trademark of Winbond Electronics
Corporation.
All other product names or trademarks are properties of their
respective owners.

IB781 User’s Manual iii
Table of Contents
Introduction....................................................... 1
Product Description.......................................................... 1
Specifications................................................................... 2
Board Dimensions............................................................ 3
Installations....................................................... 5
Installing the Memory (DDR DIMM)............................... 6
Setting the Jumpers .......................................................... 7
Connectors on IB781...................................................... 11
BIOS Setup...................................................... 23
Drivers Installation...................................... 45
Appendix........................................................... 51
A. I/O Port Address Map................................................ 51
B. Interrupt Request Lines (IRQ).................................... 52
C. Watchdog Timer Configuration.................................. 53

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INTRODUCTION
IB781 User’s Manual 1
Introduction
Product Description
IB781 is a high-performance flexible embedded board based on the VIA
CLE 266 chipset. The chipset is based on an innovative and scaleable
architecture with proven reliability. It is a two-chip set consisting of the
VT8623 North Bridge Controller and VT8235 South Bridge Controller.
IB781 supports the Socket 370 processors with speeds of up to 1.4GHz
and with front side bus of up to 133MHz. Two 184-pin DDR DIMM
sockets support can accommodate a total memory size of 2GB.
Combining a fully integrated video processing feature set, Integrated
UniChrome™ 2D/3D graphics engine and ultra efficient VIA DDR
memory controller, the VIA Unichrome™ CLE266 Chipset is designed
to enable high quality digital video streaming and DVD playback in a
new generation of small form factor PCs and IA devices. Shared
memory capacity is up to 64MB.
One 10/100Mbps Ethernet onboard is supported by the Realtek 8100C
single chip Ethernet controller or it can replaced with an optional
RTL8110s-32 Gigabit LAN.
With dimensions of 338mm x 122mm,IB781 has other features such as
Watchdog timer, DiskOnChip socket, four USB 1.1/2.0 ports.

INTRODUCTION
2IB781 User’s Manual
Specifications
Form Factor PICMG (Full Size CPU Card)
CPU Type Socket 370 (Intel PIII / Celeron)
CPU Voltage 1.1V~1.85V
System Speed 533MHz~1.4GHz
CPU External
Clock 66/100/133Mhz
Green /APM APM1.2
CPU Socket Socket 370
Chipset North Bridge: 548 pin VT8623 (2D/3D)(CLE266)
South Bridge: 487 pin VT8235 CD
BIOS Award BIOS, 2Mbit support ACPI function
Cache CPU integrated
Memory
two 184-pin DDR DIMM socket supports , Supports DDR200/266 DDR DIMM Max.2GB
VGA VT8623 Integrated AGP 4X, 2D 128 Bit 3D 128
Bit VGA controller, Analog
MPEG-2
Hardware Slice Layer, IDCT & Motion Compensation
LCD interface Support 24-bit TTL LCD, 18BIT LVDS
LAN RTL 8100C(L)(10/100) or RTL8110s-32
(10/100/1000) Single
Chip Ethernet Controller.
Sound VT8235 Built Sound controller + AC97 Codec
ALC655 (Line-out, Line-in, Mic)
LPC I/O Winbond 83697HF: Parallel x1, COM1, COM2,
FDC 2.88MB (3 Mode Support), Hardware
monitor (3 thermal inputs, 8 voltage monitor
inputs, VID0-4, 1 chassis open detection, 3 Fan
Header)
PCI TO ISA
Bridge ITE IT8888
ISA High Drive Yes
Disk On Chip Yes
UART/16550A COM1: RS232
COM2: RS232/422/485
RTC/CMOS VT8235 built-in
Battery Lithium battery
Keyboard/Mouse VT8235 built-in
IDE VT8235 built-in, IDE1, 2 (Ultra DMA
33/66/100/133)
USB Supports 1.1/2.0 USB 4 ports
Watchdog Timer 256 levels

INTRODUCTION
IB781 User’s Manual 3
Board Dimensions

INTRODUCTION
4IB781 User’s Manual
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INSTALLA
TIONS
IB781 User’s Manual 5
Installations
This section provides information on how to use the jumpers and
connectors on the IB781 in order to set up a workable system. The topics
covered are:
Installing the Memory (DDR DIMM)............................... 6
Setting the Jumpers .......................................................... 7
Connectors on IB781...................................................... 11

INSTALLATIONS
6IB781 User’s Manual
Installing the Memory (DDR DIMM)
The IB781 board supports one 184-pin DDR DIMM socket for a
maximum total memory of 1GB in DDR DRAM type. The memory
module capacities supported are 64MB, 128MB, 256MB, 512MB and
1GB.
Installing and Removing DIMMs
To install the DDR DIMM, locate the memory slot on the board and
perform the following steps:
1. Hold the DIMM so that the two keys of the DIMM align with those on
the memory slot.
2. Gently push the DIMM in an upright position until the clips of the slot
close to hold the DIMM in place when the DIMM touches the bottom
of the slot.
3. To remove the DDR module, press the clips with both hands.
Top View of DIMM Socket
DDR Module
Lock
Lock
Lock
Lock