Tyan Computer TYAN S1668 Soft Power On Switch J1 CPU FAN Power J49 and J50, Turbo Switch

Page 11

Soft Power On Switch: J1

CPU FAN Power: J49 and J50

3.3 CMOS RTC

Pinout Assignment

1Soft Power On

2Ground

Pinout Assignment

112Volts

2Ground

CMOS RTC includes an internal battery and Real Time Clock circuit. It provides the date and the time for the system. Normally the life span of a RTC internal battery is 10 years. When replacing, you should use the same model.

3.4 Speaker Connector Installation

S1668 provides a 4-Pin header (J43) to connect the speaker. The polarity can go either way.

3.5 Turbo Switch

The front panel on your case may have a turbo switch to control system speed when slower program execution is required for software developed in the old XT days. The Intel 44FX chipset doesn't support a de-turbo

mode, but the S1668 has a connector (J47) for the cable that may come has a connector (J47) for the cable that may come with the case.with the case.

3.6 Turbo LED Connector Installation

The TURBO LED on the front case panel can indicate the current speed status of the system. The TURBO LED connector should be installed to J42 in the correct direction.

S1668-ATX-001 http://www.tyan.com

11

Image 11

Contents Tyan S1668 Dual Pentium Pro ATX 440FX PCI-ISA System Board Table Of Contents Introduction Hardware Specifications/Features Environment Software SpecificationsBoard Installation VRM1 On Board Resource Setting .1 S1668 ATX Board LayoutCPU Clock Multiplier J21, J22, J23 and J24 Jumper Settings CPU Speed J27, J21, J22, J23, and J24Cmos Resest/Password Reset J41Default off Dram Voltage J2, J3, J14, J15, J4, J5, J16 and J17DefaultSelection J28 & J29 Speaker Connector J43 Keylock Connector J44Turbo Switch J47 Non-Turbo Mode Not Supported InfraRed Interface Con4 and Con5 Reset Connector J45Turbo LED Connector J42 Flash Eeprom J32DefaultTurbo LED Connector Installation Soft Power On Switch J1 CPU FAN Power J49 and J50Speaker Connector Installation Turbo SwitchRefer to for Flash Eeprom upgrade procedures Hardware Reset Switch Connector InstallationVoltage ID for Older Pentium Pro CPUs J10 and J20 Dram InstallationBank0 Bank1 Bank2 Bank3 Total Memory TableCPU Installation Connecting the Power Supply & On/Off Switch VRM InstallationPeripheral Device Installation Entering Setup Bios ConfigurationControl Keys Getting Help Main Menu Setup Page menu/Option Page Setup MenuPower Management setup Standard Cmos setupBios features setup Chipset features setupTime Standard Cmos Setup MenuDate Drive a type/Drive B type Primary/Secondary Drive typeMemory VideoHalt On Other Memory Expanded MemoryCPU Internal Cache/External Cache Boot SequenceSwap Floppy Drive Default value is Disabled Virus warningBoot Up NumLock Status Default value is On Boot Up Floppy SeekChipset Features Setup ROM ISA Bios Power Management Setup Award SOFTWARE, INC Power ManagementPower Down Activities Doze ModeStandby Mode PCI Slot Configuration PCI/ISA PnP Resources Controlled ByIRQ n assigned to Legacy ISAIntegrated Peripherals Load Setup Defaults ROM ISA Bios Cmos Setup Utility Award SOFTWARE, INC IDE HDD Auto Detection Flash Writer Utility Page Flash Memory Writer Flash Memory Writer Utility Screen AwardSystem Resources Timer & DMA Channel MAP