Intel D845EPT2, D845EBG2 manual Desktop Board Resources, DMA Channels, System Memory Map

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Intel Desktop Boards D845EPT2 and D845EBG2 Product Guide

Desktop Board Resources

Memory Map

Table 31. System Memory Map

Address Range (decimal)

1024 K - 2097152 K

960 K - 1024 K

896 K - 960 K

800 K - 896 K

640 K - 800 K

639 K - 640 K

512 K - 639 K

0 K - 512 K

Address Range (hex)

100000 - 7FFFFFF

F0000 - FFFFF

E0000 - EFFFF

C8000 - DFFFF

A0000 - C7FFF

9FC00 - 9FFFF

80000 - 9FBFF

00000 - 7FFFF

Size

2047 MB

64KB

64KB

96KB

160KB

1KB

127KB

512KB

Description

Extended Memory

Runtime BIOS

Reserved

Available high DOS memory (open to the PCI bus)

Video memory and BIOS

Extended BIOS data (movable by memory manager software)

Extended conventional memory

Conventional memory

DMA Channels

Table 32. DMA Channels

DMA Channel Number

0

1

2

3

4

5

6

7

Data Width

8 or 16 bits

8 or 16 bits

8 or 16 bits

8 or 16 bits

8 or 16 bits

16bits

16bits

16bits

System Resource

Parallel port

Floppy drive

Parallel port (for ECP or EPP)

DMA controller

Open

Open

Open

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Contents Intel Desktop Boards D845EPT2 and D845EBG2 Product Guide Revision History Contents Updating the Bios Intel Desktop Boards D845EPT2 and D845EBG2 Product GuideContents Technical ReferenceTables Desktop Board Features Feature SummaryForm Factors Processor Memory ChipsetHardware Management Power ManagementExpansion Capabilities Desktop Board Features Desktop Board ComponentsDesktop Board D845EBG2 Components Processor TypeDesignation FSB FrequencyMain Memory Intel 845E ChipsetInput/Output I/O Controller Intel 82845E Memory Controller Hub MCHIntel 82801DB I/O Controller Hub ICH4 Firmware Hub FWHRJ-45 LAN Connector LEDs RJ-45 LAN Connector LEDsAudio Subsystem LAN Subsystem OptionalHi-Speed USB 2.0 Support Enhanced IDE InterfacePCI Auto Configuration Expansion SlotsAccelerated Graphics Port AGP Communication and Networking Riser CNR OptionalPower Management Features IDE Auto ConfigurationSecurity Passwords Suspend to RAM Instantly Available PC TechnologyLocation of Standby Power Indicator Hardware Management Real-Time Clock BatterySpeaker Installing and Replacing Desktop Board Components Before You BeginInstalling the I/O Shield Installing the I/O ShieldInstalling and Removing the Desktop Board Installing and Replacing Desktop Board ComponentsInstalling the Processor Fan Heat Sink Installing and Removing a ProcessorInstalling a Processor Connecting the Processor Fan Heat Sink Cable Removing a ProcessorInstalling and Removing Memory Installing DIMMsRemoving DIMMs Installing and Removing the AGP CardInstalling an AGP Card Connecting the IDE Cable Removing the AGP CardConnecting the IDE Cable Setting the Bios Configuration Jumper Block Jumper Settings for the Bios Setup Program Modes J8H2Jumper Setting Mode DescriptionInstalling the Front Panel Audio Solution Clearing Passwords Replacing the Battery PrécautionVorsicht Removing the Battery Intel Desktop Boards D845EPT2 and D845EBG2 Product Guide Updating the Bios Updating the Bios with the Intel Express Bios Update UtilityObtaining the Bios Update File Updating the BiosRecovering the Bios Updating the BiosIntel Desktop Boards D845EPT2 and D845EBG2 Product Guide Using the Bios Setup Program Setup screen menu bar is shown belowShows the Bios Setup program menu bar Bios Setup Program Menu BarMaintenance Menu Bios Setup Program Function KeysMaintenance Maintenance MenuExtended Configuration Submenu Extended Configuration SubmenuEnglish default Main MenuMain Main MenuAdvanced Menu Advanced MenuAdvanced PCI Configuration Submenu PCI Configuration SubmenuPCI Configuration Options Auto default DescriptionBoot Configuration Submenu Boot Configuration SubmenuBoot Configuration Options No defaultPeripheral Configuration Submenu Peripheral Configuration SubmenuBi-directional default DefaultIRQ 7 default Default Enabled defaultIDE Configuration Submenu IDE Configuration SubmenuIDE Configuration Both defaultAdvanced Security Primary/Secondary IDE Master/Slave SubmenusPrimary/Secondary IDE Master/Slave Submenus Floppy Configuration Submenu Floppy Configuration SubmenuThis submenu shown in is used to configure the floppy drive Event Log Configuration Submenu Event Log Configuration SubmenuEvent Log Configuration Enabled default Yes default DescriptionVideo Configuration Submenu Video Configuration SubmenuSubmenu shown in is used to configure video features USB Configuration Submenu Menu shown in is used to configure USB featuresUSB Configuration Submenu Security MenuPower Menu Menu shown in is used to set power management featuresSubmenu represented in is for setting the Acpi features Acpi SubmenuBoot Menu Boot MenuBoot Device Priority Submenu Submenu represented in is for setting boot devices priorityBoot Device Priority Submenu OptionsSubmenu shown in is for setting hard disk drives Submenu in shown is for setting removable devicesHard Disk Drives Submenu Removable Devices SubmenuSubmenu shown in is for setting Atapi CD-ROM drives Exit MenuAtapi CD-ROM Drives Atapi CD-ROM Drives SubmenuConnectors Technical ReferenceBack Panel Connectors Description ColorMidboard Connectors Front Panel Audio Header Signal Names J8B1Pin Signal Name Shows the pin assignments for the front panel audio headerPower and Hardware Connectors Add-In Card and Peripheral Interface Connectors CNR optional PCI bus connector 1 SMBus routed Front Panel Headers Front Panel USB 2.0 Header J9F1Desktop Board Resources Memory MapDMA Channels System Memory MapInterrupts InterruptsIntel Desktop Boards D845EPT2 and D845EBG2 Product Guide Error Messages and Indicators Bios Beep CodesBeep Codes Number of Beeps DescriptionBios Error Messages Bios Error MessagesError Message ExplanationError Messages and Indicators Intel Desktop Boards D845EPT2 and D845EBG2 Product Guide Safety Regulations Safety RegulationsRegulatory Compliance EMC RegulationsProduct Certification Markings Installation Precautions Installation InstructionsEnsure Electromagnetic Compatibility EMC Compliance Regulatory CompliancePrevent Power Supply Overload Place Battery MarkingChassis and Component Certifications Use Only for Intended Applications
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D845EBG2, D845EPT2 specifications

The Intel D845EBG2 and D845EPT2 are part of Intel's 845 chipset family, designed primarily for desktop platforms in the early 2000s. Both motherboards catered to a performance-focused market segment, prominently supporting Intel’s Pentium 4 processors through the Socket 478 interface. The D845EBG2 and D845EPT2 are especially noted for their balance of features, affordability, and reliability, making them appealing options for both gaming enthusiasts and regular desktop users during their time.

The D845EBG2 motherboard is distinguished by its support for Intel’s Quad Data Rate (QDR) memory technology, which enabled faster data throughput by allowing more data to be transferred in a given time frame. This motherboard supported dual-channel DDR SDRAM with a maximum capacity of 2GB, providing users with improved memory performance vital for multitasking and memory-intensive applications.

On the other hand, the D845EPT2 also offered similar capabilities but placed a particular emphasis on integrating additional connectivity options. With AGP 4X support, it allowed users to install high-performance graphics cards, which was essential for gaming and graphics processing tasks. Both boards featured multiple PCI slots, ensuring compatibility with a variety of expansion cards for enhanced functionality.

In terms of storage capabilities, both motherboards supported Ultra ATA/100 hard drives, which improved data transfer speeds compared to previous standards. They also included integrated audio, providing 6-channel sound capabilities, which delivered an immersive multimedia experience without requiring additional sound cards.

The technologies implemented in both motherboards included Intel’s Advanced Digital Media Boost for enhanced processing capabilities in multimedia applications, as well as Enhanced Intel SpeedStep technology, which allowed for dynamic adjustment of the processor’s voltage and frequency, optimizing power consumption and thermal output.

Overall, the Intel D845EBG2 and D845EPT2 motherboards were notable for their robust performance, diverse connectivity options, and support for evolving technologies of the time. They left a significant imprint in the landscape of early 2000s computing, providing essential features that catered to both casual users and more demanding computing environments. With their reliability and solid feature set, these motherboards contributed to a range of applications and use cases that defined desktop computing during that era.