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Intel DX79SI Intel Desktop Board DX79SI Technical Product Specification - Page 50

Signal Tables for the Connectors and Headers - bios key

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Intel Desktop Board DX79SI Technical Product Specification 2.2.2.1 Signal Tables for the Connectors and Headers Table 13. Front Panel Audio Header for Intel HD Audio Pin Signal Name Description 1 PORT_1L Analog Port 1 - left channel (microphone) 2 GND Ground 3 PORT_1R Analog Port 1 - right channel (microphone) 4 PRESENCE# Active low signal that signals BIOS that an Intel HD Audio dongle is connected to the analog header. PRESENCE#=0 when an Intel HD Audio dongle is connected 5 PORT_2R Analog Port 2 - right channel (headphone) 6 SENSE1_RETURN Jack detection return for front panel (JACK1) 7 SENSE_SEND Jack detection sense line from the Intel HD Audio CODEC jack detection resistor network 8 KEY No pin 9 PORT_2L Analog Port 2 - left channel (headphone) 10 SENSE2_RETURN Jack detection return for front panel (JACK2) Table 14. Front Panel Audio Header for AC '97 Audio Pin Signal Name Description 1 MIC 2 AUD_GND 3 MIC_BIAS Front panel microphone input signal (biased when supporting stereo microphone) Ground used by analog audio circuits Microphone power/additional MIC input for stereo microphone support 4 PRESENCE# 5 FP_OUT_R 6 AUD_GND Active low signal that signals BIOS that an Intel HD Audio dongle is connected to the analog header. PRESENCE#=0 when an Intel HD Audio dongle is connected. Right channel audio signal to front panel (headphone drive capable) Ground used by analog audio circuits 7 RESERVED 8 KEY 9 FP_OUT_L 10 AUD_GND Reserved No pin Left channel audio signal to front panel (headphone drive capable) Ground used by analog audio circuits 50

Section	Page
Intel® Desktop Board DX79SI Technical Product Specification	1
Revision History	2
Board Identification Information	3
Specification Changes or Clarifications	3
Errata	3
Preface	5
Contents	7
1 Product Description	11
1.1 Overview	11
1.1.1 Feature Summary	11
1.1.2 Board Layout	13
1.1.3 Block Diagram	15
1.2 Legacy Considerations	16
1.3 Online Support	16
1.4 Processor	16
1.4.1 PCI Express x16 Graphics	17
1.5 System Memory	17
1.5.1 Memory Configurations	19
1.6 Intel® X79 Express Chipset	21
1.6.1 USB	21
1.6.2 SATA Interfaces	21
1.7 Real-Time Clock Subsystem	23
1.8 Legacy I/O Controller	23
1.8.1 Consumer Infrared (CIR)	23
1.9 Audio Subsystem	24
1.9.1 Audio Subsystem Software	24
1.9.2 Audio Subsystem Components	24
1.10 LAN Subsystem	26
1.10.1 Intel® 82579L and Intel 82574L Gigabit Ethernet Controllers	26
1.10.2 LAN Subsystem Software	27
1.10.3 RJ-45 LAN Connector with Integrated LEDs	27
1.11 Bluetooth*/WiFi Module	28
1.11.1 Bluetooth Technology	28
1.11.2 WiFi 802.11 Wireless	29
1.12 Hardware Management Subsystem	29
1.12.1 Hardware Monitoring and Fan Control	29
1.12.2 Fan Monitoring	30
1.12.3 Chassis Intrusion and Detection	30
1.12.4 Thermal Monitoring	31
1.13 Power Management	32
1.13.1 ACPI	32
1.13.2 Hardware Support	35
1.15 Onboard Power and Reset Buttons	41
2 Technical Reference	43
2.1 Memory Resources	43
2.1.1 Addressable Memory	43
2.1.2 Memory Map	45
2.2 Connectors and Headers	45
2.2.1 Back Panel Connectors	46
2.2.2 Component-side Connectors and Headers	48
2.3 Jumper Block	58
2.4 Mechanical Considerations	60
2.4.1 Form Factor	60
2.5 Electrical Considerations	61
2.5.1 Power Supply Considerations	61
2.5.2 Fan Header Current Capability	62
2.5.3 Add-in Board Considerations	62
2.6 Thermal Considerations	63
2.7 Reliability	65
2.8 Environmental	65
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
3.4 System Management BIOS (SMBIOS)	69
3.5 Legacy USB Support	69
3.6 BIOS Updates	70
3.6.1 Language Support	70
3.6.2 Custom Splash Screen	71
3.7 BIOS Recovery	71
3.8 Boot Options	72
3.8.1 Optical Drive Boot	72
3.8.2 Network Boot	72
3.8.3 Booting Without Attached Devices	72
3.8.4 Changing the Default Boot Device During POST	72
3.9 Adjusting Boot Speed	73
3.9.1 Peripheral Selection and Configuration	73
3.9.2 BIOS Boot Optimizations	73
3.10 BIOS Security Features	74
3.11 BIOS Performance Features	75
4 Error Messages and Beep Codes	77
4.1 Speaker	77
4.2 BIOS Beep Codes	77
4.3 Front-panel Power LED Blink Codes	78
4.4 BIOS Error Messages	78
4.5 Port 80h POST Codes	79
5 Regulatory Compliance and Battery Disposal Information	85
5.1 Regulatory Compliance	85
5.1.1 Safety Standards	85
5.1.2 European Union Declaration of Conformity Statement	86
5.1.3 Product Ecology Statements	87
5.1.4 EMC Regulations	89
5.1.5 ENERGY STAR* 5.0, e-Standby, and ErP Compliance	92
5.1.6 Regulatory Compliance Marks (Board Level)	93