Tyan Computer Tyan S1598 Settings Chart, Virus Warning, CPU Internal Cache/External Cache

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Chapter 3

BIOS Configuration

Settings Chart (Continued)

Setting Option	BIOS Default	Setup Default

D4000-D7FFF Shadow	Disabled	Disabled

D8000-DBFFF Shadow	Disabled	Disabled

DC000-DFFFF Shadow	Disabled	Disabled

Cyrix 6x86 / MII CPU ID	Enabled	Enabled

Virus Warning

When enabled, you receive a warning message if a program (specifically, a virus) attempts to write to the boot sector or the partition table of the hard disk drive. You should then run an anti-virus program. Keep in mind that this feature protects only the boot sector, not the entire hard drive. Note: Many disk diagnostic programs that access the boot sector table can trigger the virus warning message. If you plan to run such a program, we recommend that you first disable the virus warning.

CPU Internal Cache/External Cache

Cache memory is additional memory that is much faster than conventional DRAM (system memory). CPUs from 486-type on up contain internal cache memory, and most, but not all, modern PCs have additional (external) cache memory. When the CPU requests data, the system transfers the requested data from the main DRAM into cache memory, for even faster access by the CPU. The External Cache field may not appear if your system does not have external cache memory.

Quick Power On Self Test

Select Enabled to reduce the amount of time required to run the power-on self- test (POST). A quick POST skips certain steps. We recommend that you normally disable quick POST. Better to find a problem during POST than lose data during your work.

Boot Sequence

The original IBM PCs loaded the operating system from drive A (floppy disk), so IBM PC-compatible systems are designed to search for an operating system first on drive A, and then on drive C (hard disk). However, modern computers usually load the operating system from the hard drive, and may even load it from a CD-ROM drive. The BIOS now offers a large number of boot devices and boot sequence options.

Swap Floppy Drive

This field is effective only in systems with two floppy drives. Selecting

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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 IconsBios Information On Board CacheChipset Information System MemorySoftware Specifications Other FeaturesTechnical Support On BoardAudio Manufacturing OptionHelp resources Returning Merchandise for ServiceFor Resellers Only Unpacking PrecautionsWhat’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 Setting Jumpers CPU Bus Speed SettingsCPU Core Voltage Settings CPU Clock Multiplier66MHz. The benefit of this setting is that you can Hardware Cmos & Password ResetJ3 External Pin Assignments FAN Pin AssignmentsAcpi Bi-Color LED Connector J5 Soft Power ConnectorSpeaker Connector Installation 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 VariationsStandard Cmos Setup Bios Features SetupChipset Features Setup Power Management SetupDate Standard Cmos SetupTime Chapter Floppy 3 Mode Support Drive A, Drive BVideo Halt OnBios Features Setup MemoryBios Feature Setup Default Settings Chart Se tting Option Bios De fault Se tup De faultSettings Chart Quick Power On Self TestBoot Sequence Virus WarningBoot Up Floppy Seek Boot Up NumLock StatusTypematic Rate Setting Typematic Delay MsecVideo Bios Shadow Security OptionPCI/VGA Palette Snoop OS Select for Dram 64MBChipset Features Setup Advanced OptionsChipset Features Setup Default Settings Chart Bank 0/1, 2/3, 4/5 Dram TimingSdram Cycle Length Dram Read PipelineVideo Bios Cacheable System Bios CacheableCache Timing Memory Hole at 15MbAddrPower Management Setup IRQ7LPT1Acpi Function Power ManagementPM Control byAPM PM Timers HDD Power DownVideo Off Option Video Off MethodDoze Mode Suspend ModeRTC Alarm Resume PM EventsProcessed. Secondary interrupts are typically IRQnPnP/PCI Configuration PnP / PCI Configuration Default Settings ChartReset Configuration Data PNP OS InstalledResources Controlled By PCI Delay Transaction PCI#2 Access #1 RetryIRQ-nAssigned to DMA-nAssigned toIntegrated Peripherals Integrated Peripherals Default Settings Chart IDE Prefetch ModeIDE HDD Block Mode On-Chip PCI IDE First/Second ChannelIDE Primary/Secondary Master/Slave Udma Init Display FirstOnboard FDD Controller Onboard Serial Port 1User Password Flash Writer UtilityChapter Flash Memory Writer Bios ROM checksum error System halted Cmos battery failedPost Messages BeepCmos checksum error Defaults loaded Display switch is set incorrectlyKeyboard error or no keyboard present CPU at nnnnOverride enabled Defaults loaded Keyboard is locked out Unlock the keyMemory Test 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