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In addition, the Video Frame Buffer setting in the BIOS Setup

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Intel Desktop Board D865GRH Technical Product Specification memory that can be accessed. In addition, the Video Frame Buffer setting in the BIOS Setup program will further reduce the amount of memory available to the operating system. Figure 15 shows a schematic of the system memory map. All installed system memory can be used when there is no overlap of system addresses. For example, all of the system address space can be utilized on a system that has 2 GB of installed system memory, AGP aperture set for 256 MB, and the PCI cards are requesting 200 MB of system address space. DRAM Range 4 GB Top of System Address Space PCI Memory Range (Contains AGP window, GFX aperture, PCI, and ICH ranges) FLASH APIC Reserved ~20 MB Video Frame Buffer Top of installed DRAM Top of usable DRAM (memory visible to the operating system) DOS Compatibility Memory 1 MB 640 KB 0 MB 0FFFFFH 0F0000H 0EFFFFH 0E0000H 0DFFFFH 0C0000H 0BFFFFH 0A0000H 09FFFFH 00000H Upper BIOS area (64 KB) Lower BIOS area (64 KB; 16 KB x 4) Add-in Card BIOS and Buffer area (128 KB; 16 KB x 8) Standard PCI/ ISA Video Memory (SMM Memory) 128 KB * DOS area (640 KB) 1 MB 960 KB 896 KB 768 KB 640 KB 0 KB * Optionally mapped to the internal AGP OM15972 Figure 15. Detailed System Memory Address Map 64

Section	Page
Intel® Desktop Board D865GRH Technical Product Specification	1
Revision History	2
Preface	3
Intended Audience	3
What This Document Contains	3
Typographical Conventions	3
Other Common Notation	4
Contents	5
1 Product Description	11
1.1 Overview	12
1.1.1 Feature Summary	12
1.1.2 Manufacturing Options	13
1.1.3 Board Layout	14
1.1.4 Block Diagram	15
1.2 Online Support	16
1.3 Operating System Support	16
1.4 Design Specifications	17
1.5 Processor	20
1.6 System Memory	21
1.6.1 Memory Configurations	23
1.7 Intel® 865G Chipset	28
1.7.1 Intel 865G Graphics Subsystem	29
1.7.2 Universal 0.8 V / 1.5 V AGP 3.0 Connector	37
1.7.3 USB	38
1.7.4 IDE Support	38
1.7.5 Real-Time Clock, CMOS SRAM, and Battery	40
1.8 I/O Controller	40
1.8.1 Serial Port	41
1.8.2 Parallel Port	41
1.8.3 Diskette Drive Controller	41
1.8.4 Keyboard and Mouse Interface	41
1.9 Audio Subsystem	42
1.9.1 Audio Subsystem Software	42
1.9.2 Intel® Flex 6 Audio Subsystem	42
1.9.3 Audio Connectors	44
1.10 LAN Subsystem	45
1.10.1 Intel® 82547EI Platform LAN Connect Device	45
1.10.2 RJ-45 LAN Connector with Integrated LEDs	45
1.10.3 LAN Subsystem Software	46
1.11 Hardware Management Subsystem	46
1.11.1 Hardware Monitoring and Fan Control ASIC	46
1.11.2 Thermal Monitoring	46
1.11.3 Fan Monitoring	48
1.11.4 Chassis Intrusion and Detection	48
1.12 Power Management	48
1.12.1 ACPI	48
1.12.2 Hardware Support	51
1.13 Trusted Platform Module	56
1.13.1 System Requirements	56
1.13.2 Warning of Potential Data Loss	56
1.13.3 Security Precautions	57
1.13.4 Trusted Platform Module Ownership	59
1.13.5 Enabling the Trusted Platform Module	59
1.13.6 Assuming Trusted Platform Module Ownership	60
1.13.7 Recovery Procedures	61
1.13.8 Clearing Trusted Platform Module Ownership	62
1.13.9 Software Support	62
2 Technical Reference	63
2.1 Introduction	63
2.2 Memory Resources	63
2.2.1 Addressable Memory	63
2.2.2 Memory Map	65
2.3 DMA Channels	65
2.4 Fixed I/O Map	66
2.5 PCI Configuration Space Map	67
2.6 Interrupts	68
2.7 PCI Interrupt Routing Map	69
2.8 Connectors	71
2.8.1 Back Panel Connectors	72
2.8.2 Internal I/O Connectors	73
2.8.3 External I/O Connectors	81
2.9 Jumper Blocks	85
2.9.1 Front Panel Audio Connector/Jumper Block	85
2.9.2 BIOS Setup Configuration Jumper Block	86
2.10 Mechanical Considerations	87
2.10.1 I/O Shield	88
2.11 Electrical Considerations	89
2.11.1 DC Loading	89
2.11.2 Add-in Board Considerations	89
2.11.3 Fan Connector Current Capability	89
2.11.4 Power Supply Considerations	90
2.12 Thermal Considerations	90
2.13 Reliability	93
2.14 Environmental	93
2.15 Regulatory Compliance	94
2.15.1 Safety Regulations	94
2.15.2 EMC Regulations	94
2.15.3 European Union Declaration of Conformity Statement	95
2.15.4 Product Ecology Statements	96
2.15.5 Product Certification Markings (Board Level)	96
3 Overview of BIOS Features	97
3.1 Introduction	97
3.2 BIOS Flash Memory Organization	97
3.3 Resource Configuration	98
3.3.1 PCI Autoconfiguration	98
3.3.2 PCI IDE Support	98
3.4 System Management BIOS (SMBIOS)	99
3.5 Legacy USB Support	99
3.6 BIOS Updates	100
3.6.1 Language Support	100
3.6.2 Custom Splash Screen	101
3.7 Recovering BIOS Data	101
3.8 Boot Options	102
3.8.1 CD-ROM Boot	102
3.8.2 Network Boot	102
3.8.3 Booting Without Attached Devices	102
3.8.4 Changing the Default Boot Device During POST	102
3.9 Fast Booting Systems with Intel Rapid BIOS Boot	103
3.9.1 Peripheral Selection and Configuration	103
3.9.2 Intel® Rapid BIOS Boot	103
3.10 BIOS Security Features	104
4 BIOS Setup Program	105
4.1 Introduction	105
4.2 Maintenance Menu	106
4.3 Main Menu	107
4.4 Advanced Menu	108
4.4.1 PCI Configuration Submenu	109
4.4.2 Boot Configuration Submenu	110
4.4.3 Peripheral Configuration Submenu	111
4.4.4 Drive Configuration Submenu	113
4.4.5 Floppy Configuration Submenu	117
4.4.6 Event Log Configuration Submenu	118
4.4.7 Video Configuration Submenu	119
4.4.8 USB Configuration Submenu	120
4.4.9 Chipset Configuration Submenu	121
4.4.10 Fan Control Configuration Submenu	124
4.4.11 Hardware Monitoring	125
4.5 Security Menu	126
4.6 Power Menu	127
4.6.1 ACPI Submenu	127
4.7 Boot Menu	128
4.7.1 Boot Device Priority Submenu	129
4.7.2 Hard Disk Drives Submenu	130
4.7.3 Removable Devices Submenu	130
4.7.4 ATAPI CD-ROM Drives Submenu	131
4.8 Exit Menu	131
5 Error Messages and Beep Codes	133
5.1 BIOS Error Messages	133
5.2 Port 80h POST Codes	135
5.3 Bus Initialization Checkpoints	139
5.4 Speaker	140