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Intel Desktop Board D845HV/D845WN Technical Product Specification 1.2.4 Block Diagram Figure 3 is a block diagram of the major functional areas of the D845HV and D845WN boards. = connector or socket USB Primary/ Secondary IDE UDMA 33 and ATA-66/100 LPC I/O Controller mPGA478 Processor Socket System Bus (400 MHz) AGP Interface 82845 Memory Controller Hub (MCH) USB LPC Bus 845 Chipset AHA Bus 82801BA I/O Controller Hub (ICH2) Back Panel USB Ports (2) Front Panel USB Ports (2) Serial Ports Parallel Port PS/2 Mouse PS/2 Keyboard Infrared Port Diskette Drive Connector 82802AB 4 Mbit Firmware Hub (FWH) 4X AGP Connector (1.5 V only) DIMM Banks (3) SDRAM Bus PCI Bus Physical Layer Interface (optional) CSMA/CD Unit Interface USB AC Link LAN Connector (optional) CNR Connector (optional) PCI Slot 1 SMBus PCI Slot 2 PCI Slot 3 PCI Slot 4 PCI Slot 5 D845WN Only PCI Slot 6 Hardware Monitor (optional) AD1885 Audio Codec (optional) Line In Line Out Mic In Auxiliary Line In CD-ROM Telephony USB Back Panel USB Ports (2) Figure 3. Block Diagram OM12274 16

Section	Page
Intel® Desktop Board D845HV/D845WN Technical Product Specification	1
Revision History / Disclaimer	2
Preface	3
Intended Audience	3
What This Document Contains	3
Typographical Conventions	3
Notes, Cautions, and Warnings	3
Other Common Notation	4
Contents	5
1 Product Description	11
1.1 Board Differences	11
1.2 Overview	12
1.2.1 Feature Summary	12
1.2.2 Manufacturing Options	13
1.2.3 Board Layouts	14
1.2.4 Block Diagram	16
1.3 Online Support	17
1.4 Operating System Support	17
1.5 Design Specifications	18
1.6 Processor	21
1.7 System Memory	22
1.8 Intel® 845 Chipset	24
1.8.1 AGP	25
1.8.2 USB	25
1.8.3 IDE Support	27
1.8.4 Real-Time Clock, CMOS SRAM, and Battery	28
1.8.5 Intel® 82802AB 4 Mbit Firmware Hub (FWH)	29
1.9 I/O Controller	29
1.9.1 Serial Ports	29
1.9.2 Infrared Support	30
1.9.3 Parallel Port	30
1.9.4 Diskette Drive Controller	31
1.9.5 Keyboard and Mouse Interface	31
1.9.6 I/O Controller Option	31
1.10 Audio Subsystem (Optional)	32
1.10.1 Audio Connectors	33
1.10.2 Audio Subsystem Software	33
1.11 LAN Subsystem (Optional)	34
1.11.1 Intel® 82562ET Platform LAN Connect Device	34
1.11.2 RJ-45 LAN Connector with Integrated LEDs	34
1.11.3 LAN Subsystem Software	35
1.12 CNR (Optional)	35
1.13 Hardware Management Subsystem	36
1.13.1 Hardware Monitor Component (Optional)	36
1.13.2 Fan Monitoring	36
1.13.3 Chassis Intrusion and Detection	37
1.14 Power Management	37
1.14.1 ACPI	37
1.14.2 Hardware Support	41
2 Technical Reference	45
2.1 Introduction	45
2.2 Memory Map	45
2.3 I/O Map	46
2.4 DMA Channels	48
2.5 PCI Configuration Space Map	48
2.6 Interrupts	49
2.7 PCI Interrupt Routing Map	49
2.8 Connectors	51
2.8.1 Back Panel Connectors	52
2.8.2 Internal I/O Connectors	55
2.8.3 External I/O Connectors	68
2.9 Jumper Blocks	72
2.9.1 Front Panel Audio Connector/Jumper Block	72
2.9.2 BIOS Setup Configuration Jumper Block	73
2.10 Mechanical Considerations	74
2.10.1 D845HV Form Factor	74
2.10.2 D845WN Form Factor	75
2.10.3 I/O Shield	76
2.11 Electrical Considerations	78
2.11.1 Power Consumption	78
2.11.2 Add-in Board Considerations	78
2.11.3 Standby Current Requirements	79
2.11.4 Fan Connector Current Capability	80
2.11.5 Power Supply Considerations	80
2.12 Thermal Considerations	81
2.13 Reliability	83
2.14 Environmental	83
2.15 Regulatory Compliance	84
2.15.1 Safety Regulations	84
2.15.2 EMC Regulations	84
2.15.3 Product Certification Markings (Board Level)	85
3 Overview of BIOS Features	87
3.1 Introduction	87
3.2 BIOS Flash Memory Organization	88
3.3 Resource Configuration	88
3.3.1 PCI Autoconfiguration	88
3.3.2 PCI IDE Support	88
3.4 System Management BIOS (SMBIOS)	89
3.5 Legacy USB Support	89
3.6 BIOS Updates	90
3.6.1 Language Support	91
3.6.2 Custom Splash Screen	91
3.7 Recovering BIOS Data	91
3.8 Boot Options	92
3.8.1 CD-ROM and Network Boot	92
3.8.2 Booting Without Attached Devices	92
3.9 Fast Booting Systems with Intel® Rapid BIOS Boot	92
3.9.1 Peripheral Selection and Configuration	92
3.9.2 Intel Rapid BIOS Boot	93
3.10 BIOS Security Features	94
4 BIOS Setup Program	95
4.1 Introduction	95
4.2 Maintenance Menu	96
4.2.1 Extended Configuration Submenu	97
4.3 Main Menu	98
4.4 Advanced Menu	99
4.4.1 PCI Configuration Submenu	100
4.4.2 Boot Configuration Submenu	101
4.4.3 Peripheral Configuration Submenu	102
4.4.4 IDE Configuration Submenu	104
4.4.5 Diskette Configuration Submenu	107
4.4.6 Event Log Configuration Submenu	108
4.4.7 Video Configuration Submenu	109
4.5 Security Menu	110
4.6 Power Menu	111
4.6.1 ACPI Submenu	112
4.7 Boot Menu	113
4.7.1 Boot Device Priority Submenu	114
4.7.2 Hard Disk Drives Submenu	115
4.7.3 Removable Devices Submenu	115
4.7.4 ATAPI CD-ROM Drives Submenu	116
4.8 Exit Menu	117
5 Error Messages and Beep Codes	119
5.1 BIOS Error Messages	119
5.2 Port 80h POST Codes	121
5.3 Bus Initialization Checkpoints	125
5.4 Speaker (Optional)	126

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Intel Desktop Board D845HV/D845WN Technical Product Specification

1.2.4

Block Diagram

Figure 3 is a block diagram of the major functional areas of the D845HV and D845WN boards.

D845WN

Only

845 Chipset

82801BA

I/O Controller Hub

(ICH2)

82845 Memory

Controller Hub

(MCH)

82802AB 4 Mbit

Firmware Hub

(FWH)

AHA

Bus

System Bus

(400 MHz)

mPGA478

Processor Socket

Primary/

Secondary IDE

Diskette Drive

Connector

LPC I/O

Controller

PS/2 Keyboard

PS/2 Mouse

Parallel Port

Serial Ports

UDMA 33 and

ATA-66/100

USB

LPC

Bus

Hardware

Monitor

(optional)

OM12274

Back Panel

USB Ports (2)

AD1885

Audio Codec

(optional)

Auxiliary Line In

Mic In

Line Out

CD-ROM

Line In

CNR

Connector

(optional)

LAN

Connector

(optional)

Physical

Layer

Interface

(optional)

PCI Slot 1

PCI Slot 2

PCI Slot 3

PCI Slot 4

PCI Slot 5

CSMA/CD

Unit Interface

DIMM Banks (3)

AGP

Interface

4X AGP

Connector

(1.5 V only)

= connector or socket

Telephony

PCI Bus

PCI Slot 6

SMBus

AC Link

USB

SDRAM

Bus

Back Panel

USB Ports (2)

Front Panel

USB Ports (2)

USB

Infrared Port

Figure 3.

Block Diagram