Intel LGA775 user manual Watchdog Timer Configuration, Sample Code

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INSTALLATIONS

Watchdog Timer Configuration

The WDT is used to generate a variety of output signals after a user programmable count. The WDT is suitable for use in the prevention of system lock-up, such as when software becomes trapped in a deadlock. Under these sort of circumstances, the timer will count to zero and the selected outputs will be driven. Under normal circumstance, the user will restart the WDT at regular intervals before the timer counts to zero.

SAMPLE CODE:

This code and information is provided "as is" without warranty of any kind, either expressed or implied, including but not limited to the implied warranties of merchantability and/or fitness for a particular purpose.

;[]================================================ ; Name : Enable_And_Set_Watchdog

;IN : AL - 1sec ~ 255sec

;OUT : None ;[]================================================ Enable_And_Set_Watchdog Proc Near

pushax

;save time interval

call

Unlock_Chip

 

mov cl, 2Bh

 

call

Read_Reg

 

and

al, NOT 10h

 

call

Write_Reg

;set GP24 as WDTO

mov cl, 07h

 

mov al, 08h

 

call

Write_Reg

;switch to LD8

mov cl, 0F5h

 

call

Read_Reg

 

and

al, NOT 08h

 

call

Write_Reg

;set count mode as second

pop ax

 

mov cl, 0F6h

 

call

Write_Reg

;set watchdog timer

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2801550 User’s Manual

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Contents 2801550 Acknowledgments Table of Contents This page is intentionally left blank Introduction Product DescriptionChecklist Specifications ATXBoard Dimensions Installations Installing the CPU ATX Power InstallationSupported DDR Dimm Configurations Installing the MemoryLock Setting the Jumpers Jumper Locations on Configuring the CPU Frequency JP4 Clear Cmos ContentsJP5 10/100Mb LAN Enable/Disable Connectors on Connector Locations on ATX1 ATX Power Supply Connector FDD1 Floppy Drive ConnectorIDE1, IDE2 Eide Connectors IDE1 Primary IDE Connector Signal NameFAN2 Chassis Fan Power Connector FAN1 CPU Fan Power ConnectorCN1 PS/2 Keyboard and PS/2 Mouse Connectors CN2, J1, J10, J13 Serial Ports CN3 Parallel Port Connector CN4 VGA CRT ConnectorCN6 USB and Gigabit LAN RJ45 Connectors CN5 USB and 10/100Mb LAN RJ45 ConnectorsCN7 Line Out, Line In, Mic Connector J4 IrDA Connector J2 Digital 4-in 4-out I/O ConnectorJ5 ATX 12V Power Connector J9 CD-In Audio Connector J11 External Audio ConnectorJ12 USB Connector J14 Wake on LAN ConnectorJ15 System Function Connector Speaker Pins 1SMI/Hardware Switch Pins 6 Watchdog Timer Configuration Sample CodeNone OUT Bios Setup Bios Introduction Bios Setup Phoenix AwardBIOS Cmos Setup Utility Standard Cmos Setup DateIDE Primary HDDs / IDE Secondary HDDs TimeDrive a / Drive B Video Halt OnDelay Prior to Thermal Advanced Bios FeaturesLimit Cpuid MaxVal Hard Disk Boot Priority Quick Power On Self TestFirst/Second/Third Boot Device Boot Other DeviceBoot Up Floppy Seek Boot Up NumLock StatusTypematic Rate Setting Typematic Delay MsecMPS Version Control for OS OS Select for Dram 64MBReport No FDD For WIN Small Logo EPA ShowAdvanced Chipset Features AGP Aperture Size MB Integrated Peripherals IDEIDE HDD Block Mode OnChip Primary/Secondary PCI IDEIDE Primary/Secondary Master/Slave PIO IDE Primary/Secondary Master/Slave UdmaUart Mode Select Parallel Port ModeAC97 Audio CSA LAN Giga-LANPower Management Setup Power ManagementAcpi Function Video Off MethodSuspend Mode HDD Power DownPower On by Ring Resume by AlarmReload Global Timer Events PNP/PCI Configurations PNP OS InstallReset Configuration Data Resources Controlled byPC Health Status Frequency/Voltage Control CPU Clock RatioAuto Detect PCI Clk Spread SpectrumLoad Fail-Safe Defaults Load Setup DefaultsSet Supervisor/User Password Save & Exit SetupThis page is intentionally left blank Drivers Installation Intel 865G Chipset Software Intallation Utility Drivers Installation Drivers Installation Intel 865G Chipset Graphics Driver Drivers Installation Realtek AC97 Codec Audio Driver Installation Intel PRO LAN Drivers Installation Appendix O Port Address MapInterrupt Request Lines IRQ Global American Inc

LGA775 specifications

The Intel LGA775, also known as Socket T, was a significant advancement in CPU socket design when it was introduced in 2004, primarily tailored for Intel's Pentium 4, Pentium D, Core 2 Duo, and Xeon processors. This socket provided a robust platform for users seeking performance improvements over previous socket designs, specifically the LGA 478.

One of the standout features of LGA775 is its physical layout. The socket utilizes a Land Grid Array configuration, comprising 775 pins on the motherboard that create an electrical connection with the chip. This design enhances the physical stability of the connection, reducing the likelihood of damage during component installation.

LGA775 supports a range of Intel technologies such as Dual-Core processing, which significantly improved multitasking and performance in demanding applications by integrating two cores within a single processor. This advancement laid the groundwork for more efficient computing, catering to both casual and professional users alike.

Another key technology associated with the LGA775 platform is the Enhanced Speedstep Technology (EIST), which allowed processors to adjust their voltage and frequency dynamically. This not only optimized performance but also contributed to energy efficiency, making it a more environmentally friendly choice for users.

The socket supports various front-side bus (FSB) speeds, ranging from 800 MHz to 1600 MHz, enabling higher data transfer rates between the CPU and RAM. This performance characteristic is critical for applications that require substantial memory throughput, such as video editing and gaming.

Moreover, LGA775 was compatible with a variety of chipsets that enhanced its capabilities, such as those featuring Intel's own Express Chipsets. These chipsets included integrated graphics, USB 2.0 support, and improved storage interfaces like SATA, which streamlined data management and boosted overall system performance.

Over the years, LGA775 has become a popular choice for budget and mid-range desktops, particularly because of its versatility and broad compatibility with different processor generations. Even with the advent of newer sockets, LGA775 remains a memorable part of Intel's legacy, representing a crucial stepping stone towards modern multi-core architectures.

In summary, Intel's LGA775 socket brought about comprehensive advancements in design, performance, and power management, making it a noteworthy component in the history of computing. Its influence continues to be felt, as it set the standards for subsequent socket designs that prioritize efficiency and performance.