Intel 281786-002 manual Board Level Features, Cpu, Performance Upgrade, Second Level Cache

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Board Level Features

A − Two PCI IDE interfaces

B − National 87306 I/O controller C − Primary power connector

D − Four SIMM sockets (two banks) E − 82438FX Triton Data Path (TDP) F − Parallel port connector

G − Floppy drive connector H − 256KB Secondary cache

I − 82437FX Triton System Controller (TSC) J − Socket 5 Pentium processor socket

K− CPU voltage regulator

L − Front Panel I/O connectors M − Configuration switch block

N − 82371FB PCI ISA/IDE Accelerator (PIIX) O − Battery for the Real-time clock

P − Four ISA expansion connectors Q − BIOS recovery boot jumper

R − Flash EEPROM for system BIOS S − Three PCI expansion connectors T − 3.3 volt power connector for PCI U − Serial port connectors

V − AT Keyboard Connector

(Optional PS/2 style Keyboard and Mouse connectors may be available)

A B C D E F G H

V

U

T

PIN 1

S

R

Q

PO N M

I

J

K

L

Figure 2. Advanced/ZP Board Level Features

CPU

The Advanced/ZP baseboard is designed to operate with 3.3 volt Pentium processors. A patented on-board voltage regulator circuit provides the required 3.3 volts from the 5 volt tap provided by a standard PC power supply. The baseboard supports the Pentium processors at iCOMP™ index 610 \ 75 MHz, 735 \ 90 Mhz, 815 \ 100 Mhz, and 1000 \ 120 Mhz. The Pentium processor is backward-compatible with the 8086, 80286, i386™ and i486™ CPUs. It supports both read and write burst mode bus cycles, and includes separate 8K on-chip code and data caches which employ a write-back policy. Also integrated into the Pentium processor is an advanced numeric coprocessor which significantly increases the speed of floating point operations, while maintaining backward compatibility with i486DX math coprocessor and complying to ANSI/IEEE standard 754-1985.

All Advanced/ZP baseboards support the 75 MHz and 90 MHz processors. The matrix below shows which Printed Board Assemblies (PBA number found on the baseboard) also support the 100 MHz or 120 MHz processor.

Processor Speed

Supported by PBA Numbers:

75 MHz

All PBAs

90 MHz

All PBAs

100 MHz

PBA 638995, PBA 641525, PBA 639379

120 MHz

Suffixes -606, -607, -806, -807, -808 and above

 

Table 1. Processor support

PERFORMANCE UPGRADE

A 320-pin Type 5 Zero Insertion Force socket provides users with a performance upgrade path to future, higher speed, Pentium® processors. An OverDrive processor being developed for use with this socket will provide performance beyond that delivered by the originally installed Pentium processor.

SECOND LEVEL CACHE

The Pentium processor's internal cache is complemented by 256 KB direct mapped write-back second level cache. The 256 KB cache configuration is implemented with eight 32kx8 asynchronous SRAM devices for the cache data and one 32kx8 SRAM for the cache tag. The cache size is set by three configuration jumpers located on the baseboard. This is preset by the factory to support the onboard 256 KB configuration.

Advanced/ZP Technical Product Summary ∙Page 5

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Contents Advanced/ZP Baby-AT Board Table of Contents ADVANCED/ZP Form Factor IntroductionMounting Hole Placement Baseboard DimensionsFront Panel Connectors JUMPERS/SWITCHESPerformance Upgrade Board Level FeaturesCPU Second Level CacheEDO Dram System MemoryExpansion Slots PCI 3.3 Volt Capabilities82437FX Triton System Controller TSC Peripheral Component Interconnect PCI Pciset82438FX Triton Data Path TDP 82371FB PCI ISA/IDE Accelerator PiixIDE Support Real Time CLOCK, Cmos RAM and BatteryNational Semiconductor 87306 Super I/O Controller Keyboard InterfaceBios Upgrades System BiosIrda Infrared Support Flash ImplementationPCI AUTO-CONFIGURATION Setup UtilityPower Management ISA Plug & PlayConnectors Security FeaturesConnections Power ConsumptionBack Panel Connections Watts CurrentSimm 1,2 Bank Simm 3,4 Bank Total System Memory Appendix a − User-Installable UpgradesRTC Battery Appendix B − Jumpers and Switches Recovery Boot Enable J1K1 Processor Voltage Regulation SwitchISA BUS Speed Switch PCI Configuration Space MAP Appendix E − Interrupts & DMA Channels Appendix D − Memory MapFront Panel Connectors − J2A1, J1B1 Appendix F − ConnectorsPower Supply Connectors Primary Power J9J1 FLoppy Connector j9c1 AT Keyboard Connector J8k1Serial Ports j7k1, j7k2 Parallel Port j9e1ISA Connectors J1G1, J2G1, J2G2, J3G1 PCI Connectors J4G1, J5G1, J5G2 Overview of the Setup Menu Screens Appendix G − Bios SetupOverview of the Setup Keys Main ScreenFloppy Options Submenu Hard Disk Configuration SubmenuIDE Translation Mode Initialization TimeoutMultiple Sector Setting Number of CylindersBoot Options Submenu Advanced Screen Peripheral Configuration SubmenuParallel Port Mode Serial Port 2 IR ModePCI IDE Interface Floppy InterfacePower Management Configuration Advanced Chipset Configuration SubmenuPlug and Play Configuration Submenu Security Screen Options Administrative and User Access ModesSecurity Screen Exit Screen Recovery Mode Appendix H − Bios RecoveryUsing the Upgrade Utility Beep Codes Appendix I − Error messages and Beep CodesError Messages ISA NMI Messages Plug and Play Error MessagesAppendix K − Reliability Data Appendix J − Environmental Standards

281786-002 specifications

The Intel 281786-002 is a highly regarded microprocessor that was part of Intel’s extensive portfolio of technology solutions. Originally released in the mid-1990s, it is recognized for its robust performance and advanced features, which catered to the needs of both personal computing and embedded systems.

One of the standout features of the Intel 281786-002 is its architecture, which includes a 32-bit data bus. This architecture allows for efficient data processing and memory management. The processor is built on a 0.6-micron process technology, contributing to reduced power consumption while enhancing overall performance. The chip operates at various clock speeds, typically ranging around 25MHz to 50MHz, allowing it to suit different applications and user requirements.

The Intel 281786-002 also boasts a sophisticated instruction set that supports a wide range of operations. This multi-functionality ensures that it can efficiently handle complex computations and multitasking scenarios. Its ability to execute instructions in parallel paves the way for better performance when running multiple applications simultaneously.

In terms of memory support, the processor is designed to interface effectively with both SRAM and DRAM technologies, accommodating a vast range of memory configurations, thereby enhancing flexibility for system designers. It is also compatible with both 16-bit and 32-bit data buses, making it versatile enough for use in various computing environments.

Another notable aspect of the Intel 281786-002 is its integrated security features. These allow for better data protection and integrity, making it a viable choice for systems requiring enhanced security protocols.

Furthermore, the microprocessor's reliability and stability have made it a preferred choice for embedded applications, network devices, and industrial systems. Its proven track record in various computing environments underscores Intel's commitment to quality and performance.

Additionally, the Intel 281786-002 supports various operating systems, providing flexibility in deployment across different computing platforms. This compatibility ensures that users can leverage existing software ecosystems without extensive modifications.

In conclusion, the Intel 281786-002 microprocessor encapsulates an amalgamation of performance, efficiency, and versatility. With its advanced features and robust architecture, it has played a significant role in shaping computing technology, making it a noteworthy component in Intel’s legacy of innovation.
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