Intel 281809-003 CPU Configuration Jumper Block J4L1C&D, Cmos -J4L1 a Pins, Pswd -J4L1 a Pins

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CPU CONFIGURATION - JUMPER BLOCK J4L1(C&D)

These allow the motherboard to be switched between different speeds of the Pentium processor. These jumpers also affect the PCI and ISA clock speeds according to the following table:

CPU Freq.

(MHz)

166

150

133

120

100

90

75

reserved

Host Bus

Freq. (MHz)

66

60

66

60

66

60

50

-

Host Bus

pins J4L1C

1-3

1-2

2-3

1-2

2-3

1-2

2-3

2-3

1-2

Host Bus

pins J4L1C

4-6

5-6

4-5

5-6

4-5

5-6

4-5

5-6

4-5

CLK Ratio

5/2

5/2

2

2

3/2

3/2

3/2

-

Clk Ratio pins J4L1D 1-3

2-3

2-3

2-3

2-3

1-2

1-2

1-2

X

Clk Ratio pins J4L1D 4-6

5-6

5-6

4-5

4-5

4-5

4-5

4-5

X

PCI Freq.

(MHz)

33

30

33

30

33

30

25

-

Table B-2. CPU/SYSTEM speed settings (* default setting)

The ISA clock is derived from the PCI bus clock. The BIOS automatically sets the ISA clock speed to one fourth of the PCI frequency.

PCI Frequency

ISA clock speed

25 MHz

6.25 MHz

30 MHz

7.5 MHz

33 MHz

8.25 MHz

Table B-3. ISA clock settings set by the BIOS based on PCI Clk Speed

CMOS -J4L1 A PINS 4-6

Allows CMOS settings to be reset to default values by moving the jumper from pins 4-5 to pins 5-6 and turning the system on. When the system reports “NVRAM cleared by jumper”, the system can be turned off and the jumper should be returned to the 4-5 position to restore normal operation. This procedure should be done whenever the system BIOS is updated. Default is for this jumper to be on pins 4-5.

PSWD -J4L1 A PINS 1-3

Allows system password to be cleared by moving the jumper from pins 1-2 to pins 2-3 and turning the system on. The system should then be turned off and the jumper should be returned to the 1-2 position to restore normal operation. This procedure should only be done if the user password has been forgotten. The password function is effectively disabled if this jumper is in the 2-3 position. Default is for the password to be enabled (1-2 position).

SETUP - J4L1 B PINS 1-3

Allows access to CMOS Setup utility to be disabled by moving this jumper from the 1-2 position to the 2-3 position. Default is for access to setup to be enabled (1-2 position).

RISER - J4G1

The riser jumper block allows routing of an extra IRQ and ID select to the riser card for an additional PCI slot to support a maximum of 3 PCI slots on a riser. Default is set for 2 PCI slots on the riser card (1-2 position and 4-5 position).

Advanced/RH Technical Product Specification ∙ Page 26

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Contents Advanced/RH Advanced/RH Technical Product Specification ∙ Table of Contents Motherboard Specifications Introduction Video Subsystem Motherboard Manufacturing OptionsAudio Subsystem Cache SubsystemBoard Level Features DD − 256K L2 PbsramLPX Form Factor CPUSystem Memory Processor UpgradeSecond Level Cache EDO Dram82371SB PCI ISA IDE Xcelerator PIIX3 Expansion RiserPeripheral Component Interconnect PCI Pciset Floppy Controller IDE SupportNational Semiconductor PC87306B Super I/O Controller Keyboard InterfaceParallel Port Real Time CLOCK, Cmos RAM and BatteryIrda INFRA-RED Support Graphics SubsystemGraphics Drivers and Utilities ATI-264VT Resolutions Supported by the MotherboardResolution Audio SubsystemAudio Drivers ConnectorsMotherboard Connectors Universal Serial BUS USBPCI IDE CdromMidi Spkr SLP/PS-ON Hdled Pwrled RST FAN Power Supply Control J9H1,J9K2Front Panel Connections J3A1, J2A1 Speaker INFRA-RED Irda ConnectorReset Sleep / ResumeCD-ROM Audio Input Audio ConnectorsMIDI/AUDIO I/O Connector Wave Table Upgrade Advanced/RH Wave Table Upgrade moduleBack Panel Connectors COMDC Voltage Acceptable tolerance Power ConsumptionSystem Configuration CPU Upgrade Appendix a − User-Installable UpgradesReal Time Clock Battery Replacement Graphics Memory UpgradeHardware Mpeg Module Appendix B − Configuration Jumper Settings J6C2Cmos SetupFreq Mult RiserPswd -J4L1 a Pins CPU Configuration Jumper Block J4L1C&DCmos -J4L1 a Pins Setup J4L1 B PinsRecovery Jumper J6C2 Drive or Overdrive J6C2Size Appendix C − Memory MapAddress Range DescriptionPiix DMA Appendix D − I/O MapAddress hex Bit # DescriptionAppendix E − PCI Configuration Space Map Bus Number Dev Number hex Func. Number DescriptionSystem Resource Appendix F − Interrupts & DMA ChannelsNMI Data Width System ResourcePrimary Power J9H1 Appendix G − ConnectorsPower Supply PCI 3.3V Power J9J1 not PopulatedFront PANEL−J3A1 Back Panel I/O Peripherals IDE Connectors J5C1 & J6C1Floppy Connector J9K1 Multimedia PCI / ISA Riser J6J2 Celp 2.1 Connector J1D1 Flash Memory Implementation Appendix-H Motherboard BiosBios Upgrades System AddressAdvanced Power Management Setup UtilityPCI AUTO-CONFIGURATION ISA Plug ‘N’ PlayLanguage Support Boot OptionsSecurity Features PCI IDESetup Enable Jumper Appendix I − PCI Configuration Error Messages Beeps Error Message Appendix J− Amibios Error messages and Beep CodesError Messages Beep CodesCmos Time and Date Not Set OFF Board Parity Error Addr HEX =ISA NMI Messages ISA NMI MessageAppendix K − Soft-off Control Appendix L − Environmental Standards Motherboard SpecificationsParameter Condition Specification Appendix M − Reliability Data

281809-003 specifications

The Intel 281809-003 is a notable memory module developed by Intel, showcasing advanced features and technologies that cater to a variety of computing applications. As part of Intel's extensive range of semiconductor products, the 281809-003 exemplifies the company’s commitment to enhancing data storage and retrieval processes.

One of the key features of the Intel 281809-003 is its capacity, designed to support a significant amount of data for efficient computing tasks. The module delivers robust performance, with increased speed and reliability that meet the demands of modern computing environments. This memory module provides enhanced data transfer rates that facilitate quick access to frequently utilized data, reducing latency and improving overall system responsiveness.

The Intel 281809-003 utilizes dynamic random access memory (DRAM) technology, which is fundamental to its operation. DRAM is known for its ability to hold data temporarily while the device is powered on, making it ideal for applications that require rapid data processing, such as gaming, content creation, and complex simulations. The efficiency of the DRAM technology also plays a pivotal role in optimizing energy consumption, thus contributing to better performance-to-power ratios.

In terms of architecture, the Intel 281809-003 is built to integrate seamlessly with Intel platforms, ensuring compatibility and optimized performance with Intel's processors. The module employs advanced error-correcting code (ECC) technology, which helps detect and correct common types of data corruption, enhancing data integrity and system stability. This feature is particularly important for mission-critical applications where data consistency is crucial.

The Intel 281809-003 also offers scalability options, making it a suitable choice for a range of systems from entry-level desktops to high-performance servers. This versatility allows for easy upgrades, accommodating evolving user needs and technological advancements without requiring complete system overhauls.

Another significant characteristic of the Intel 281809-003 is its adherence to industry standards, including JEDEC specifications, which ensures that the module is reliable and widely supported across various hardware configurations. Additionally, its design includes considerations for heat dissipation, enhancing longevity and performance during extended use.

In summary, the Intel 281809-003 memory module stands out due to its impressive capacity, speed, ECC technology, and compatibility with Intel's ecosystems. By integrating advanced DRAM technologies and adhering to rigorous industry standards, the Intel 281809-003 represents a key component for users seeking reliable and efficient memory solutions in their computing endeavors.
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