Tyan Computer Tyan S1598 Security Option, PCI/VGA Palette Snoop, OS Select for Dram 64MB

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Chapter 3

BIOS Configuration

Security Option

If you have set a password, select whether the password is required every time the System boots, or only when you enter Setup.

PCI/VGA Palette Snoop

Your BIOS Setup many not contain this field. If the field is present, leave at Disabled.

OS Select for DRAM > 64MB

Select OS2 only if you are running OS/2 operating system with greater than 64 MB of RAM on your system.

Video BIOS Shadow

Software that resides in a read-only memory (ROM) chip on a device is called firmware. The EliteBIOS permits shadowing of firmware such as the system BIOS, video BIOS, and similar operating instructions that come with some expansion peripherals, such as, for example, a SCSI adaptor.

Shadowing copies firmware from ROM into system RAM, where the CPU can read it through the 16-bit or 32-bit DRAM bus. Firmware not shadowed must be read by the system through the 8-bit X-bus. Shadowing improves the performance of the system BIOS and similar ROM firmware for expansion peripherals, but it also reduces the amount of high memory (640 KB to 1 MB) available for loading device drivers, etc.

Enable shadowing into each section of memory separately. Many system designers hardwire shadowing of the system BIOS and eliminate a System BIOS Shadow option.

Video BIOS shadows into memory area C0000-C7FFF. The remaining areas shown on the BIOS Features Setup screen may be occupied by other expan- sion card firmware. If an expansion peripheral in your system contains ROM- based firmware, you need to know the address range the ROM occupies to shadow it into the correct area of RAM.

Cyrix 6x86 / MII CPU ID

Select Enabled to enable the Cyrix 6x86 / MII CPU support. The settings are Enabled or Disabled.

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Contents Tyan S1598 Motherboard User’s Manual RevisionTable of Contents This page has been intentionally left blank Chapter OverviewHardware Specifications/Features IconsChipset Information Bios InformationOn Board Cache System MemoryTechnical Support Software SpecificationsOther Features On BoardAudio Manufacturing OptionReturning Merchandise for Service Help resourcesFor Resellers Only Precautions UnpackingWhat’s the first thing I should do? Installation Steps Do Notapply Power to the Board if IT has Been DamagedWhat is a Jumper? Pin jumpers Or more pin jumpers Off OpenMap of Motherboard Jumpers DimmPicture of Motherboard Features CPU Core Voltage Settings Setting JumpersCPU Bus Speed Settings CPU Clock MultiplierJ3 External Pin Assignments 66MHz. The benefit of this setting is that you canHardware Cmos & Password Reset FAN Pin AssignmentsSpeaker Connector Installation Acpi Bi-Color LED Connector J5Soft Power Connector Mounting the Motherboard in the ChassisInstalling Memory Dimm Bank TotalChapter Cache Memory Installing the CPU and Cooling Fan CPUInstall Connecting IDE and Floppy Drives Connecting the Power Supply Connecting Floppy DrivesInstalling Add-on Cards Connecting PS/2, USB, Serial & Parallel Devices Frequently Asked Questions You are doneInstall Chapter This page intentionally left blank Bios Configuration Introduction to SetupSetup Keys Key Function Main Setup Menu Setup VariationsChipset Features Setup Standard Cmos SetupBios Features Setup Power Management SetupStandard Cmos Setup DateTime Chapter Video Floppy 3 Mode SupportDrive A, Drive B Halt OnBios Features Setup MemoryBios Feature Setup Default Settings Chart Se tting Option Bios De fault Se tup De faultBoot Sequence Settings ChartQuick Power On Self Test Virus WarningTypematic Rate Setting Boot Up Floppy SeekBoot Up NumLock Status Typematic Delay MsecPCI/VGA Palette Snoop Video Bios ShadowSecurity Option OS Select for Dram 64MBChipset Features Setup Advanced OptionsSdram Cycle Length Chipset Features Setup Default Settings ChartBank 0/1, 2/3, 4/5 Dram Timing Dram Read PipelineCache Timing Video Bios CacheableSystem Bios Cacheable Memory Hole at 15MbAddrPower Management Setup IRQ7LPT1Power Management Acpi FunctionPM Control byAPM Video Off Option PM TimersHDD Power Down Video Off MethodRTC Alarm Resume Doze ModeSuspend Mode PM EventsProcessed. Secondary interrupts are typically IRQnPnP/PCI Configuration PnP / PCI Configuration Default Settings ChartPNP OS Installed Reset Configuration DataResources Controlled By IRQ-nAssigned to PCI Delay TransactionPCI#2 Access #1 Retry DMA-nAssigned toIntegrated Peripherals IDE HDD Block Mode Integrated Peripherals Default Settings ChartIDE Prefetch Mode On-Chip PCI IDE First/Second ChannelOnboard FDD Controller IDE Primary/Secondary Master/Slave UdmaInit Display First Onboard Serial Port 1User Password Flash Writer UtilityChapter Flash Memory Writer Post Messages Bios ROM checksum error System haltedCmos battery failed BeepKeyboard error or no keyboard present Cmos checksum error Defaults loadedDisplay switch is set incorrectly CPU at nnnnMemory Test Override enabled Defaults loadedKeyboard is locked out Unlock the key Memory test failThis page has been intentionally left blank Appendix Glossary Appendix Glossary Appendix Glossary Appendix Document # D1353-100 Jumper Settings Quick Reference See pages 14-16 for details on Jumpers