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Intel Desktop Board D865GSA Technical Product Specification 1.1 Overview 1.1.1 Feature Summary Table 1 summarizes the major features of the Desktop Board D865GSA. Table 1. Feature Summary Form Factor microATX (9.60 inches by 8.80 inches [243.84 millimeters by 223.52 millimeters]) Processor Support for the following: • Intel® Pentium® D processor in an LGA775 socket with an 800 MHz system bus Memory Chipset Video Audio Legacy I/O Control USB Peripheral Interfaces LAN Support • Intel® Pentium® 4 processor in an LGA775 socket with an 800 or 533 MHz system bus • Intel® Celeron® D processor in an LGA775 socket with a 533 MHz system bus • Two 184-pin DDR SDRAM Dual Inline Memory Module (DIMM) sockets • Support for DDR 400, DDR 333, and DDR 266 • Support for up to 2 GB of system memory Intel® 865G Chipset, consisting of: • Intel® 82865G Graphics and Memory Controller Hub (GMCH) • Intel® 82801EB I/O Controller Hub (ICH5) • 4 Mbit Firmware Hub (FWH) Intel® Extreme Graphics 2 controller Audio subsystem for AC '97 processing using the Realtek* ALC655 codec Winbond* W83627EHG LPC Bus I/O controller Support for USB 2.0 devices • Eight USB ports • One serial port • One parallel port • Two Serial ATA IDE interfaces • Two Parallel ATA IDE interfaces with UDMA 33, ATA-66/100 support • One diskette drive interface • PS/2* keyboard and mouse ports 10/100 Mbits/sec LAN subsystem using the Realtek RTL8100C Ethernet LAN controller continued 10

Section	Page
Intel® Desktop Board D865GSA 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	9
1.1 Overview	10
1.1.1 Feature Summary	10
1.1.2 Board Layout	12
1.1.3 Block Diagram	14
1.2 Online Support	15
1.3 Processor	15
1.4 System Memory	16
1.4.1 Memory Configurations	18
1.5 Intel® 865G Chipset	21
1.5.1 Intel 865G Graphics Subsystem	21
1.5.2 Universal 0.8 V / 1.5 V AGP 3.0 Connector	29
1.5.3 USB	30
1.5.4 IDE Support	30
1.5.5 Real-Time Clock, CMOS SRAM, and Battery	32
1.6 Legacy I/O Controller	36
1.6.1 Serial Port	36
1.6.2 Parallel Port	36
1.6.3 Diskette Drive Controller	36
1.6.4 Keyboard and Mouse Interface	37
1.7 Audio Subsystem	37
1.7.1 Audio Subsystem Software	37
1.7.2 Audio Connectors	37
1.8 LAN Subsystem	38
1.8.2 LAN Subsystem Software	38
1.9 Hardware Management Subsystem	39
1.9.1 Hardware Monitoring and Fan Control	39
1.9.2 Fan Monitoring	39
1.9.3 Chassis Intrusion and Detection	39
1.9.4 Thermal Monitoring	40
1.10 Power Management	41
1.10.1 ACPI	41
1.10.2 Hardware Support	43
2 Technical Reference	47
2.1 Memory Map	47
2.2 Fixed I/O Map	48
2.3 PCI Configuration Space Map	49
2.4 Interrupts	50
2.5 DMA Channels	51
2.6 PCI Interrupt Routing Map	51
2.7 Connectors	52
2.7.1 Back Panel Connectors	53
2.7.2 Component-side Connectors	54
2.8 Jumper Block	61
2.9 Mechanical Considerations	62
2.9.1 Form Factor	62
2.9.2 I/O Shield	63
2.10 Electrical Considerations	64
2.10.1 DC Loading	64
2.10.2 Fan Connector Current Capability	64
2.10.3 Add-in Board Considerations	64
2.10.4 Power Supply Considerations	65
2.11 Thermal Considerations	66
2.12 Reliability	68
2.13 Environmental	69
2.14 Regulatory Compliance	70
2.14.1 Safety Regulations	70
2.14.2 European Union Declaration of Conformity Statement	70
2.14.3 Product Ecology Statements	72
2.14.4 EMC Regulations	75
2.14.5 Product Certification Markings (Board Level)	76
3 Overview of BIOS Features	77
3.1 Introduction	77
3.2 BIOS Flash Memory Organization	78
3.3 Resource Configuration	78
3.3.1 PCI Autoconfiguration	78
3.3.2 PCI IDE Support	79
3.4 System Management BIOS (SMBIOS)	79
3.5 Legacy USB Support	80
3.6 BIOS Updates	80
3.6.1 Language Support	81
3.6.2 Custom Splash Screen	81
3.7 Boot Options	81
3.7.1 CD-ROM Boot	81
3.7.2 Network Boot	81
3.7.3 Booting Without Attached Devices	82
3.7.4 Changing the Default Boot Device During POST	82
3.8 Fast Booting Systems with Intel® Rapid BIOS Boot	82
3.8.1 Peripheral Selection and Configuration	82
3.8.2 Intel Rapid BIOS Boot	83
3.9 BIOS Security Features	84
4 Error Messages and Beep Codes	85
4.1 BIOS Error Messages	85
4.2 Port 80h POST Codes	86
4.3 Bus Initialization Checkpoints	91
4.4 Speaker	92