Intel MB886 DRAM RAS# Precharge, Precharge Delay tRAS, System Memory Frequency, Onboard PCI-ELAN

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DRAM RAS# Precharge

BIOS SETUP

DRAM RAS# Precharge

This option sets the number of cycles required for the RAS to accumulate its charge before the SDRAM refreshes. The default setting for the Active to Precharge Delay is 4.

Precharge Delay (tRAS)

The default setting for the Precharge Delay is 12.

System Memory Frequency

The default setting is 533MHz.

SLP_S4# Assertion Width

The default setting is 1 to 2 Sec.

System BIOS Cacheable

The setting of Enabled allows caching of the system BIOS ROM at F000h-FFFFFh, resulting in better system performance. However, if any program writes to this memory area, a system error may result.

Video BIOS Cacheable

The Setting Enabled allows caching of the video BIOS ROM at C0000h-F7FFFh, resulting in better video performance. However, if any program writes to this memory area, a system error may result.

Memory Hole At 15M-16M

In order to improve performance, certain space in memory can be reserved for ISA cards. This memory must be mapped into the memory space below 16 MB. The choices are Enabled and Disabled.

On-Chip VGA Setting

The fields under the On-Chip VGA Setting and their default settings are: PEG/On Chip VGA Control: Auto

PEG Force x1: Disabled

On-Chip Frame Buffer Size: 8MB

DVMT Mode: DVMT

DVMT/Fixed Memory Size: 128MB

Onboard PCI-E LAN

By default, this setting is enabled.

Onchip ICH7 LAN

By default, this setting is enabled.

MB886 User’s Manual

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Contents Industrial Motherboard Socket LGA775 Pentium Intel 945G ChipsetVersion MB886Acknowledgments BIOS Setup InstallationsDrivers Installation IntroductionThis page is intentionally left blank INTRODUCTION ChecklistIntroduction INSTALLATIONS Product DescriptionMB886 SpecificationsSystem GraphicsBoard Dimensions Installations Installing the CPU Installing the Memory ATX Power InstallationSetting the Jumpers Jumper Locations on MB886 JP6 Clear CMOS Contents JP4 IDE DMA Mode SettingConnectors on MB886 Connector Locations on MB886 ATX2 ATX 12V Power Connector ATX1 24-pinATX Power ConnectorSignal Name Pin #CN2, J2, J7, J8 COM1/2/3/4 Serial Ports CN1 PS/2 Keyboard and PS/2 Mouse ConnectorsCN4: VGA CRT Connector CN3 Parallel Port ConnectorCN6 10/100 RJ-45and USB0/1 Connector CN5 Audio ConnectorCN7 GbE RJ-45and USB2/3 Connector CN11, CN10, CN9, CN8 SATA0/1/2/3 ConnectorJ5 USB4/USB5 Connector J1 Digital I/O Connector 4 in, 4 outJ6 USB6/USB7 Connector J3 Audio Front HeaderJ10 System Function Connector J9 Wake On LAN ConnectorSpeaker Pins Pin # Signal NameATX Power ON Switch Pins 7 and Power LED PinsReset Switch Pins 9 and Hard Disk Drive LED Connector Pins 10 andFAN2, FAN3, FAN4 Fan Power Connectors J11 IrDA ConnectorFAN1 CPU Fan Power Connector PCIE_1: x16 PCI Express Slot IDE1 Primary IDE ConnectorsPCIE 2, PCIE 3 x1 PCI Express Slots PCI1, PCI2, PCI3, PCI4 PCI Slots SL1 ISA SlotSAMPLE CODE Watchdog Timer ConfigurationINSTALLATIONS INSTALLATIONS INSTALLATIONS INSTALLATIONS BIOS Setup Press DEL to Enter Setup BIOS IntroductionBIOS Setup BIOS SETUP Date Standard CMOS SetupIDE Channel Master/Slave TimeDrive A / Drive B CYLSHalt On VideoCPU Feature Advanced BIOS FeaturesHard Disk Boot Priority Virus WarningFirst/Second/Third Boot Device Quick Power On Self TestBoot Other Device Boot Up Floppy SeekSecurity Option Typematic Delay MsecAPIC Mode MPS Version Control for OSDRAM Timing Selectable Advanced Chipset FeaturesCAS Latency Time DRAM RAS# to CAS# DelayVideo BIOS Cacheable System BIOS CacheableOn-ChipVGA Setting DRAM RAS# PrechargeOnChip IDE Device Integrated PeripheralsOnboard Device 2nd Super IO DeviceOn-chipPrimary PCI IDE Enabled IDE DMA Transfer AccessIDE HDD Block Mode OnChip Primary/Secondary PCI IDEPower ON Function On-ChipSerial ATA SettingKB Power ON Password Hot Key Power ONPWRON After PWR-Fail Onboard Serial PortUART Mode Select RUN VGABIOS if S3 Resume Power Management SetupPower Management ACPI FunctionPower On by Ring HDD Power DownResume by Alarm Video Off MethodReload Global Timer Events Reset Configuration Data PNP/PCI ConfigurationsInit Display First Resources Controlled byCPU Warning Temperature PC Health StatusTemperatures/Voltages Smart Fan2 TemperatureCPU Clock Ratio Frequency/Voltage ControlAuto Detect PCI Clk Spread Spectrum ModulatedLoad Optimized Defaults Load Fail-SafeDefaultsSet Supervisor Password Save & Exit SetupChipset Software Installation Utility Drivers InstallationRealtek Codec Audio Driver Installation Intel 945GIntel 945G Chipset Software Installation Utility DRIVERS INSTALLATION Intel 945G Chipset Graphics Driver Realtek Codec Audio Driver Installation Intel LAN Drivers Installation A. I/O Port Address Map AppendixLevel B. Interrupt Request Lines IRQ