Tyan Computer TYAN S1668 Selection J28 & J29, Speaker Connector J43 Keylock Connector J44

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I/O Selection: J28 & J29
	J28	J29
For COM 1 and 2	1-2	1-2	Default
For InfraRed	2-3	2-3

Speaker Connector: J43

Keylock Connector: J44

Pins 1 to 3 for power LED.

Pins 4 and 5 for Keylock

Pinout Assignments

1Speaker out

2Ground

3Ground

4+ 5V

Pinout Assignments

1Led Output

2No Connect

3Ground

4Keylock

5Ground

Turbo Switch: J47 ( Non-Turbo Mode Not Supported )

HDD LED: J46

Pinout Assignments

1	Cathode
2	Anode
3	Cathode
4	Anode

Pins 1 and 2 are for primary IDE channel.

Pins 3 and 4 are for secondary IDE channel.

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

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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 LayoutCmos Resest/Password Reset J41Default off Jumper Settings CPU Speed J27, J21, J22, J23, and J24Dram Voltage J2, J3, J14, J15, J4, J5, J16 and J17Default CPU Clock Multiplier J21, J22, J23 and J24Speaker Connector J43 Keylock Connector J44 Turbo Switch J47 Non-Turbo Mode Not SupportedSelection J28 & J29 Turbo LED Connector J42 Reset Connector J45Flash Eeprom J32Default InfraRed Interface Con4 and Con5Speaker Connector Installation Soft Power On Switch J1 CPU FAN Power J49 and J50Turbo Switch Turbo LED Connector InstallationRefer 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 VRM Installation Peripheral Device InstallationConnecting the Power Supply & On/Off Switch Entering Setup Bios ConfigurationControl Keys Getting Help Main Menu Setup Page menu/Option Page Setup MenuBios features setup Standard Cmos setupChipset features setup Power Management setupStandard Cmos Setup Menu DateTime Drive a type/Drive B type Primary/Secondary Drive typeVideo Halt OnMemory Other Memory Expanded MemorySwap Floppy Drive Default value is Disabled Boot SequenceVirus warning CPU Internal Cache/External CacheBoot Up NumLock Status Default value is On Boot Up Floppy SeekChipset Features Setup ROM ISA Bios Power Management Setup Award SOFTWARE, INC Power ManagementDoze Mode Standby ModePower Down Activities PCI Slot Configuration IRQ n assigned to Resources Controlled ByLegacy ISA PCI/ISA PnPIntegrated 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