Contents
Version
USER’S Manual
Acknowledgments
Table of Contents
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Introduction
Checklist
Product Description
Board Dimensions
Installations
Installing the Memory
ATX Power Installation
Setting the Jumpers
Jumper Locations on MB820
JP1 RS232/422/485 COM2 Selection
JP2 COM1 RS232 +5V/+12V Power Setting
JP3 COM2 RS232 +5V/+12V Power Setting
JP6 COM4 RS232 +5V/+12V Power Setting
JP4 Clear Cmos Contents
JP5 COM3 RS232 +5V/+12V Power Setting
JP7 DiskOnChip Address Select
JP8 Onboard VGA Enable/Disable
Connectors on MB820
Connector Locations on MB820
DIMM3, DIMM4 DDR Channel B Connectors
ATXP1 ATX Power Supply Connector
ATXP2 ATX 12V Power Connector
DIMM1, DIMM2 DDR Channel a Connectors
CN3, J3 Serial Ports
CN1 PS/2 Keyboard and PS/2 Mouse Connectors
CN2 4-port USB Connector
CN6 VGA CRT Connector
CN4 Parallel Port Connector
J4 CD-In Audio Connector
CN7 USB and LAN RJ45 Connectors
CN8 Audio Connector
J1 IrDA Connector
J9 Wake On LAN Connector
J5, J6 Serial ATA Sata Connectors
J8, J10 COM3 and COM4 Serial Ports Connector
J12 System Function Connector
J11 Digital I/O Connector 4 in, 4 out
Power LED Pins 11
FAN3 Chassis Fan Power Connector
FAN1 CPU Fan Power Connector
FAN2 VGA Fan Power Connector
RM/LC
FDD1 Floppy Drive Connector
IRQ15
IDE, IDE2 Primary and Secondary IDE Connectors
Sample Code
Watchdog Timer Configuration
Mov Cl, 0F5h Call ReadReg Al, not 08h Call WriteReg
Out dx, al
Installations
Bios Setup
Bios Setup
Bios Introduction
Phoenix AwardBIOS Cmos Setup Utility
Date
Standard Cmos Setup
Drive a / Drive B
Time
IDE Primary HDDs / IDE Secondary HDDs
Halt On
Video
CPU L1 and L2 Cache
Advanced Bios Features
Hard Disk Boot Priority
Quick Power On Self Test
Boot Up NumLock Status
First/Second/Third Boot Device
Boot Other Device
Boot Up Floppy Seek
OS Select for Dram 64MB
Apic Mode
Security Option
MPS Version Control for OS
Advanced Chipset Features
AGP Aperture Size
IDE
Integrated Peripherals
IDE Primary/Secondary Master/Slave PIO
IDE HDD Block Mode
IDE DMA Transfer Access
OnChip Primary/Secondary PCI IDE
USB Keyboard Support
On-Chip Serial ATA
USB Controller
USB 2.0 Controller
Chip Select Pin
Uart Mode Select
Parallel Port Mode
Acpi Function
Power Management Setup
Power Management
Video Off In Suspend
Suspend Mode
HDD Power Down
Video Off Method
Wake Up On LAN
Power On by Ring
Resume by Alarm
Reload Global Timer Events
Resources Controlled by
PNP/PCI Configurations
PNP OS Install
Reset Configuration Data
PC Health Status
CPU Warning Temperature
Temperatures/Fan Speeds/Voltages
Shutdown Temperature
Spread Spectrum
Frequency/Voltage Control
Auto Detect DIMM/PCI Clk
Save & Exit Setup
Load Fail-Safe Defaults
Load Setup Defaults
Set Supervisor/User Password
Drivers Installation
Intel 875P Chipset Software Intallation Utility
Drivers Installation
Drivers Installation
Realtek AC97 Codec Audio Driver Installation
Intel PRO LAN Drivers Installation
VGA Drivers Installation
Drivers Installation