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Intel Desktop Board D845GVFN Technical Product Specification 1.1 Overview 1.1.1 Feature Summary Table 1 summarizes the major features of the Intel® Desktop Board D845GVFN. Table 1. Feature Summary Form Factor Processor microATX (9.20 inches by 8.20 inches [233.68 millimeters by 208.28 millimeters]) • Support for an Intel® Pentium® 4 processor in an mPGA478 socket with a 400/533 MHz system bus • Support for an Intel® Celeron® processor in an mPGA478 socket with a 400 MHz system bus Memory • Two 184-pin DDR SDRAM Dual Inline Memory Module (DIMM) sockets • Support for single-sided or double-sided DIMMs (DDR333/266/200) • Support for up to 2 GB system memory Chipset Video Intel® 845GV Chipset, consisting of: • Intel® 82845GV Graphics and Memory Controller Hub (GMCH) • Intel® 82801DB I/O Controller Hub (ICH4) • 3 Mbit Firmware Hub (FWH) Intel® Extreme Graphics controller Audio Audio subsystem for AC '97 processing using the Realtek ALC202A codec I/O Control SMSC LPC47M172 LPC Bus I/O controller or National Semiconductor PC87372 LPC Bus I/O controller USB Support for USB 2.0 devices Peripheral Interfaces • Up to four USB ports • One serial port • One parallel port • Two IDE interfaces with UDMA 33, ATA-66/100 support • One diskette drive interface • PS/2* keyboard and mouse ports • Three fan connectors Expansion Capabilities Three PCI bus add-in card connectors (SMBus routed to PCI bus connector 2) BIOS • Intel/AMI BIOS (resident in the 3 Mbit FWH) • Support for Advanced Configuration and Power Interface (ACPI), Plug and Play, and SMBIOS Instantly Available PC Technology • Support for PCI Local Bus Specification Revision 2.2 • Suspend to RAM support • Wake on PCI, RS-232, front panel, PS/2 devices, and USB ports 10

Section	Page
Intel® Desktop Board D845GVFN Technical Product Specification	1
Revision History / Disclaimer	2
Preface	3
Intended Audience	3
What This Document Contains	3
Typographical Conventions	3
Other Common Notation	4
Contents	5
1 Product Description	9
1.1 Overview	10
1.1.1 Feature Summary	10
1.1.2 Manufacturing Options	11
1.1.3 Board Layout	12
1.2 Block Diagram	13
1.3 Online Support	14
1.4 Operating System Support	14
1.5 Design Specifications	15
1.6 Processor	18
1.7 System Memory	19
1.8 Intel® 845GV Chipset	21
1.8.1 Intel® Extreme Graphics Controller	21
1.8.2 USB	26
1.8.3 IDE Interfaces	26
1.8.4 Real-Time Clock, CMOS SRAM, and Battery	27
1.9 I/O Controller	28
1.9.1 Serial Ports	28
1.9.2 Parallel Port	28
1.9.3 Diskette Drive Controller	28
1.9.4 Keyboard and Mouse Interface	28
1.10 Audio Subsystem	29
1.10.1 Audio Connectors	29
1.10.2 Audio Subsystem Software	30
1.11 LAN Subsystem (Optional)	30
1.11.1 Intel® 82562ET Platform LAN Connect Device	30
1.11.2 RJ-45 LAN Connector with Integrated LEDs	31
1.11.3 LAN Subsystem Software	31
1.12 Hardware Management Subsystem (Optional)	31
1.12.1 Hardware Monitoring and Fan Control ASIC	31
1.12.2 Fan Monitoring	32
1.12.3 Chassis Intrusion and Detection	32
1.13 Power Management	32
1.13.1 ACPI	32
1.13.2 Hardware Support	35
2 Technical Reference	39
2.1 Introduction	39
2.2 Memory Map	39
2.3 Fixed I/O Map	40
2.4 DMA Channels	41
2.5 PCI Configuration Space Map	41
2.6 Interrupts	42
2.7 PCI Interrupt Routing Map	43
2.8 Connectors	45
2.8.1 Back Panel Connectors	46
2.8.2 Internal I/O Connectors	47
2.8.3 External I/O Connectors	52
2.9 Jumper Blocks	56
2.9.1 Front Panel Audio Connector/Jumper Block	56
2.9.2 BIOS Setup Configuration Jumper Block	57
2.10 Mechanical Considerations	58
2.10.1 I/O Shield	59
2.11 Electrical Considerations	60
2.11.1 DC Loading	60
2.11.2 Add-in Board Considerations	60
2.11.3 Fan Connector Current Capability	60
2.11.4 Power Supply Considerations	61
2.12 Thermal Considerations	61
2.13 Reliability	63
2.14 Environmental	63
2.15 Regulatory Compliance	64
2.15.1 Safety Regulations	64
2.15.2 EMC Regulations	64
2.15.3 European Union Declaration of Conformity Statement	65
2.15.4 Product Ecology Statements	65
2.15.5 Product Certification Markings (Board Level)	66
3 Overview of BIOS Features	67
3.1 Introduction	67
3.2 BIOS Flash Memory Organization	68
3.3 Resource Configuration	68
3.3.1 PCI Autoconfiguration	68
3.3.2 PCI IDE Support	69
3.4 System Management BIOS (SMBIOS)	69
3.5 Legacy USB Support	70
3.6 BIOS Updates	70
3.6.1 Language Support	71
3.6.2 Custom Splash Screen	71
3.7 Boot Options	71
3.7.1 CD-ROM Boot	71
3.7.2 Network Boot	71
3.7.3 Booting Without Attached Devices	72
3.7.4 Changing the Default Boot Device During POST	72
3.8 Fast Booting Systems with Intel® Rapid BIOS Boot	73
3.8.1 Peripheral Selection and Configuration	73
3.8.2 Intel Rapid BIOS Boot	73
3.9 BIOS Security Features	74
4 Error Messages and Beep Codes	75
4.1 BIOS Error Messages	75
4.2 Port 80h POST Codes	77
4.3 Bus Initialization Checkpoints	81
4.4 Speaker	82