IBASE Technology MB820 User manual

MB820
Socket 478 Pentium®4
Intel®875P Chipset
Industrial Motherboard
USER’S MANUAL
Version 1.0

ii MB820 User’s Manual
Acknowledgments
Award is a registered trademark of Award Software International,
Inc.
PS/2 is a trademark of International Business Machines
Corporation.
IntelandPentium4areregisteredtrademarksofIntelCorporation.
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.

MB820 User’s Manual iii
Table of Contents
Introduction....................................................... 1
Checklist...........................................................................1
Product Description ..........................................................2
Board Dimensions.............................................................3
Installations....................................................... 4
ATX Power Installation.....................................................5
Installing the Memory.......................................................5
Setting the Jumpers...........................................................6
Connectors on MB820.....................................................11
Watchdog Timer Configuration.......................................23
BIOS Setup....................................................... 27
Drivers Installation...................................... 49
Intel 875P Chipset Software Intallation Utility.................50
Realtek AC97 Codec Audio Driver Installation ...............53
Intel PRO LAN Drivers Installation.................................54
VGA Drivers Installation.................................................55

iv MB820 User’s Manual
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INTRODUCTION
MB820 User’s Manual 1
Introduction
Checklist
Your MB820 Pentium®4 motherboard package should include the items
listed below:
•The MB820 motherboard
•This User’s Manual
•1 Backplate
•2IDE Cable
•1 Floppy Cable
•2 SATA Cable
•1 Dual-Serial-Port Cable
•1 CD containing the following:
•Chipset Drivers
•Flash Memory Utility

INSTALLATIONS
2MB820 User’s Manual
Product Description
The MB820 Pentium®4motherboard incorporates the Intel 875P chipset
that can utilize asingle PGA478 processor of up to 3.2GHz or higher and
supports FSB frequency of 400/533/800Mhz (100Mhz, 133Mhz, and
200Mhz HCLK respectively).
The 875P chipset is designed for use with the Pentium®4 processor with
512-KB L2 cache on 0.13 micron process. The integrated MCH
component provides the CPU interface, DDR interface, AGP interface,
Hub Interface and AGP 8X graphics interface.
Four DDR memory sockets supports DDR 400/333/266 SDRAM
DIMM modules of up to 4GB in capacity. ECC is also supported.
The board also comes optional with either integrated 10/100MB LAN
support or an Intel®82547GI Gigabit LAN controller. Two Serial ATA
connectors offer 1.5 Gigabits/sec data throughput speed -faster than the
most advanced parallel ATA.
Expansion is provided by four PCI slots, two ISA slots and one AGP8X
interface. Other advanced features include six USB 2.0 ports, IrDA
interface, PCI to ISA bridge, digital I/O, four serial ports, watchdog timer
and audio function. Dimensions of the board are 12”by 9.5”in an ATX
form factor.

INTRODUCTION
MB820 User’s Manual 3
Board Dimensions

INSTALLATIONS
4MB820 User’s Manual
Installations
This section provides information on how to use the jumpers and
connectors on the MB820 in order to set up a workable system. The
topics covered are:
ATX Power Installation
Installing the Memory
Setting the Jumpers
Connectors on MB820
Watchdog Timer Configuration

INSTALLATIONS
MB820 User’s Manual 5
ATX Power Installation
The system power is provided to the motherboard with the ATXP1 and
ATXP2 ATX power connectors.ATXP2 is a 4-pin 12V power connector.
ATXP1 is to be connected to a standard ATX power connector.
Installing the Memory
The MB820 motherboard supports four DDR memory sockets for a
maximum total memory of 4GB in DDR memory type. You can install
unbuffered & ECC DDR DIMMs. It supports DDR266 when installed
with CPUs that have clock speeds of 400MHz. It supports DDR266/333
when installedwith CPUs that have clock speeds of 533MHz. It supports
DDR266/320/400 when installed with CPUs that have clock speeds of
800MHz. The board provides dual channel functionality for its DIMM
slots. DIMM1/2is for one channel and DIMM3/4 is for another channel.
Enabling dual channels can increase data access rates by putting two
similar-size DDR modules into two same-color DIMM slots.
Basically, the system memory interface has the following features:
Supports two 64-bit wide DDR data channels
Available bandwidth up to 3.2GB/s (DDR400) for single-channel
mode and 6.4GB/s (DDR400) in dual-channel mode.
Supports ECC DIMMs.
Supports 128Mb, 256Mb, 512Mb, 1Gb DDR technologies.
Supports only x8, x16, DDR devices with four banks
Registered DIMMs not supported
Supports opportunistic refresh
Up to 16 simultaneously open pages (four per row, four rows
maximum)

INSTALLATIONS
6MB820 User’s Manual
Setting the Jumpers
Jumpers are used on MB820 to select various settings and features
according to your needs and applications. Contact your supplier if you
have doubts about the best configuration for your needs. The following
lists the connectors on MB820 and their respective functions.
Jumper Locations on MB820.............................................................7
JP1: RS232/422/485 (COM2) Selection..........................................8
JP2: COM1 RS232 +5V/+12V Power Setting.................................8
JP3: COM2 RS232 +5V/+12V Power Setting.................................8
JP4: Clear CMOS Contents................................................................9
JP5: COM3 RS232 +5V/+12V Power Setting.................................9
JP6: COM4 RS232 +5V/+12V Power Setting.................................9
JP7: DiskOnChip Address Select.....................................................10
JP8: Onboard VGA Enable/Disable.................................................10

INSTALLATIONS
MB820 User’s Manual 7
Jumper Locations on MB820
Jumper Locations on MB820..............................................................Page
JP1: RS232/422/485 (COM2) Selection..................................................8
JP2: COM1 RS232 +5V/+12V Power Setting ........................................8
JP3: COM2 RS232 +5V/+12V Power Setting ........................................8
JP4: Clear CMOS Contents.......................................................................9
JP5: COM3 RS232 +5V/+12V Power Setting ........................................9
JP6: COM4 RS232 +5V/+12V Power Setting ........................................9
JP7: DiskOnChip Address Select.............................................................10
JP8: Onboard VGA Enable/Disable........................................................10

INSTALLATIONS
8MB820 User’s Manual
JP1: RS232/422/485 (COM2) Selection
COM1 is fixed for RS-232 use only.
J3, COM2 is selectable for RS232, RS-422 and RS-485.
The following table describes the jumper settings for COM2 selection.
COM2
Function RS-232 RS-422 RS-485
Jumper
Setting
(pin closed)
Short:
1-2
9-11
10-12
15-17
16-18
Short:
3-4
7-9
8-10
13-15
14-16
Short:
5-6
7-9
8-10
13-15
14-16
JP2: COM1 RS232 +5V/+12V Power Setting
JP2Setting Function
Pin 1-2
Short/Closed +12V
Pin 3-4
Short/Closed Normal
Pin 5-6
Short/Closed +5V
JP3: COM2 RS232 +5V/+12V Power Setting
JP3Setting Function
Pin 1-2
Short/Closed +12V
Pin 3-4
Short/Closed Normal
Pin 5-6
Short/Closed +5V

INSTALLATIONS
MB820 User’s Manual 9
JP4: Clear CMOS Contents
Use JP4, a 3-pin header, to clear the CMOS contents. Note that the
ATX-power connector should be disconnected from the motherboard
before clearing CMOS.
JP4Setting Function
Pin 1-2
Short/Closed Normal
Pin 2-3
Short/Closed Clear CMOS
JP5: COM3 RS232 +5V/+12V Power Setting
JP5Setting Function
Pin 1-2
Short/Closed +12V
Pin 3-4
Short/Closed Normal
Pin 5-6
Short/Closed +5V
JP6: COM4 RS232 +5V/+12V Power Setting
JP6Setting Function
Pin 1-2
Short/Closed +12V
Pin 3-4
Short/Closed Normal
Pin 5-6
Short/Closed +5V

INSTALLATIONS
10 MB820 User’s Manual
JP7: DiskOnChip Address Select
JP7Address
D0000-D7FFF
D8000-DFFFF (default)
JP8: Onboard VGA Enable/Disable
Use JP8 to enable or disable the onboard VGA controller.
JP8 Setting Onboard VGA
Pin 1-2
Short/Closed Enabled
Pin 2-3
Short/Closed Disabled

INSTALLATIONS
MB820 User’s Manual 11
[
Connectors on MB820
The connectors on MB820 allows you to connect external devices such as
keyboard, floppy disk drives, hard disk drives, printers, etc. The following
table lists the connectors on MB820 and their respective functions.
Connector Locations on MB820..........................................12
ATXP1: ATX Power Supply Connector...............................13
ATXP2: ATX 12V Power Connector...................................13
DIMM1, DIMM2: DDR Channel A Connectors..................13
DIMM3, DIMM4: DDR Channel B Connectors..................13
AGP1: AGP Slot....................................................................13
PCI1, PCI2, PCI3, PCI4: PCI Slots......................................13
SL1, SL2: ISA Slots...............................................................13
CN1: PS/2 Keyboard and PS/2 Mouse Connectors.............14
CN2: 4-port USB Connector................................................14
CN3, J3: Serial Ports.............................................................14
CN4: Parallel Port Connector...............................................15
CN6: VGA CRT Connector..................................................15
CN7: USB and LAN RJ45 Connectors................................16
CN8: Audio Connector.........................................................16
J1: IrDA Connector ...............................................................16
J4: CD-In Audio Connector..................................................16
J5, J6: Serial ATA (SATA) Connectors................................17
J8, J10: COM3 and COM4 Serial Ports Connector ............17
J9: Wake On LAN Connector...............................................17
J11: Digital I/O Connector (4 in, 4 out)...............................18
J12: System Function Connector..........................................18
FAN1: CPU Fan Power Connector......................................20
FAN2: VGA Fan Power Connector .....................................20
FAN3: Chassis Fan Power Connector..................................20
FDD1: Floppy Drive Connector...........................................21
IDE, IDE2: Primary and Secondary IDE Connectors ..........22

INSTALLATIONS
12 MB820 User’s Manual
Connector Locations on MB820

INSTALLATIONS
MB820 User’s Manual 13
ATXP1: ATX Power Supply Connector
ATXP1 is a 20-pin ATX power supply connector. Refer to the following
table for the pin out assignments.
Signal Name Pin # Pin # Signal Name
3.3V 11 13.3V
-12V 12 23.3V
Ground 13 3Ground
PS-ON 14 4+5V
Ground 15 5Ground
Ground 16 6+5V
Ground 17 7Ground
-5V 18 8Power good
+5V 19 95VSB
+5V 20 10 +12V
11 1
20 10
ATXP2: ATX 12V Power Connector
Pin # Signal Name
1Ground
2Ground
3+12V
4+12V
DIMM1, DIMM2: DDR Channel A Connectors
DIMM1 and DIMM2 are the first DDR channel connectors that must be
use together at one time in order for the system to function properly.
DIMM3, DIMM4: DDR Channel B Connectors
DIMM3 and DIMM4 are the second DDR channel connectors that must
be use together at one time in order for the system to function properly.
AGP1:AGP Slot
PCI1, PCI2, PCI3, PCI4: PCI Slots
SL1, SL2: ISA Slots

INSTALLATIONS
14 MB820 User’s Manual
CN1: PS/2 Keyboard and PS/2 Mouse Connectors
PS/2 Mouse
PS/2 Keyboard
Signal Name Keyboard Mouse Signal Name
Keyboard data 11Mouse data
N.C. 22N.C.
GND 33GND
5V 445V
Keyboard clock 55Mouse clock
N.C. 66N.C.
CN2: 4-port USB Connector
CN2 is a USB connector consisting of four ports stacked vertically.
Pin Signal Name
1Ground
2USB+
3USB-
CN2 4Vcc
CN3, J3: Serial Ports
CN3 (COM1) is a DB-9 connector, while J3 is a COM2 pin-header
connector. COM2 is optionally available as a DB-9 connector (CN5).
COM1 COM2
Signal Name Pin # Pin # Signal Name
DCD, Data carrier detect 16DSR, Data set ready
RXD, Receive data 27RTS, Request to send
TXD, Transmit data 38CTS, Clear to send
DTR, Data terminal ready 49RI, Ring indicator
GND, ground 510 Not Used

INSTALLATIONS
MB820 User’s Manual 15
CN4: Parallel Port Connector
CN4 is a DB-25 external connector situated on top of the VGA and serial
ports. The following table describes the pin-out assignments of this
connector.
CN4 Parallel Port
Signal Name Pin # Pin # Signal Name
Line printer strobe 114 AutoFeed
PD0, parallel data 0 215 Error
PD1, parallel data 1 316 Initialize
PD2, parallel data 2 417 Select
PD3, parallel data 3 518 Ground
PD4, parallel data 4 619 Ground
PD5, parallel data 5 720 Ground
PD6, parallel data 6 821 Ground
PD7, parallel data 7 922 Ground
ACK, acknowledge 10 23 Ground
Busy 11 24 Ground
Paper empty 12 25 Ground
Select 13 N/A N/A
CN6: VGA CRT Connector
CN6 is a DB-15 VGA connector located beside the COM1 port. The
following table shows the pin-out assignments of this connector.
Signal Name
Pin # Pin # Signal Name
Red 12Green
Blue 34N.C.
GND 56GND
GND 78GND
N.C. 910 GND
N.C. 11 12 N.C.
HSYNC13 14 VSYNC
NC 15

INSTALLATIONS
16 MB820 User’s Manual
CN7: USB and LAN RJ45 Connectors
CN7 consists of an RJ-45 connector (top) and two stacked USB ports.
Refer to the section below for their respective pin assignments.
Pin # Signal Name
1Vcc
2USB-
3USB+
USB0
USB1 4Ground
CN8: Audio Connector
CN8 is a 3-jack audio connector beside the
USB/RJ45 combo connector.
J1: IrDA Connector
J1 is used for an optional IrDA connector for wireless communication.
Pin # Signal Name
1+5V
2No connect
3Ir RX
4Ground
5Ir TX
J4: CD-In Audio Connector
Pin # Signal Name
1CD Audio R
2Ground
3Ground
4CD Audio L