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Technical Reference Guide www.hp.com 8-1
8
SYSTEM BIOS
8.1 Introduction
The System Basic Input/Output System (BIOS) of the computer is a collection of machine
language programs stored as firmware in read-only memory (ROM). The system BIOS includes
such functions as Power-On Self Test (POST), PCI device initialization, Plug 'n Play support,
power management activities, and the Setup utility. The firmware contained in the system BIOS
ROM supports the following operating systems and specifications:
■ DOS 6.2
■ Windows 2000, XP, and Vista (Home and Professional versions)
■ Windows NT 4.0 (SP6 required for PnP support)
■ OS/2 ver 2.1 and OS/2 Warp
■ SCO Unix
■ DMI 2.1
■ Intel Wired for Management (WfM) ver. 2.2
■ Alert Standard Format (ASF) 2.0
■ ACPI and OnNow
■ SMBIOS 2.4
■ Intel PXE boot ROM for the integrated LAN controller
■ BIOS Boot Specification 1.01
■ Enhanced Disk Drive Specification 3.0
■ “El Torito” Bootable CD-ROM Format Specification 1.0
■ ATAPI Removeable Media Device BIOS Specification 1.0
The BIOS firmware is contained in a 1024 x 8 (8 Mb) flash ROM part. The runtime portion of
the BIOS resides in a 128KB block from E0000h to FFFFFh.
This chapter includes the following topics:
■ ROM flashing (8.2)
■ Boot functions (8.3)
■ Client management functions (8.4)
■ SMBIOS support (8.5)
■ USB legacy support (8.6)
■ Management engine functions (8.7)
- Technical Reference Guide 1
- First Edition (October 2007) 2
- Contents 3
- 3 Processor/Memory Subsystem 4
- 4 System Support 4
- 5 Input/Output Interfaces 4
- 8SYSTEM BIOS 6
- A Error Messages and Codes 6
- Introduction 7
- 1.5 Notational Conventions 9
- Table 1-1 10
- Table 1-1 (Continued) 11
- System Overview 17
- 2.2 Features 18
- Table 2-1 19
- 2.3 System Architecture 20
- 2.3.1 Intel Processor Support 22
- 2.3.2 Chipset 23
- 2.3.3 Support Components 24
- 2.3.4 System Memory 24
- 2.3.5 Mass Storage 25
- 2.3.9 Graphics Subsystem 26
- 2.3.10 Audio Subsystem 26
- 2.4 Specifications 27
- Table 2-8 28
- Physical Specifications 28
- Table 2-9 29
- Table 2-10 30
- Optical Drive Specifications 30
- Table 2-11 31
- Hard Drive Specifications 31
- Processor/Memory Subsystem 33
- 3.2 Intel Processors 34
- 3.3 Memory Subsystem 36
- 3.3.1 Memory Upgrading 37
- System Support 39
- Software/Driver Layer 41
- Transaction Protocol Layer 41
- 4.2.3 Option ROM Mapping 42
- 4.2.4 PCI Interrupts 42
- 4.2.6 PCI Connectors 43
- PCI Express Connectors 44
- 4.3 System Resources 45
- 4.3.2 Direct Memory Access 46
- 4.4.1 Clearing CMOS 47
- 4.5 System Management 48
- Power-On / Setup Password 49
- Setup Password 49
- Cable Lock Provision 49
- I/O Interface Security 49
- Chassis Security 49
- 4.5.2 Power Management 50
- 4.5.3 System Status 51
- 4.6.1 System I/O Map 52
- 4.6.2 GPIO Functions 53
- I/O Controller Functions 54
- Input/Output Interfaces 55
- 5.2 SATA Interface 56
- 5.3 PATA Interface 57
- 5.4 Diskette Drive Interface 58
- Table 5-3 59
- 5.5 Serial Interface 60
- 5.6 Parallel Interface 61
- Table 5-5 62
- Table 5-6 64
- 5.8.1 USB Connector 65
- 5.8.2 USB Cable Data 66
- 5.9 Audio Subsystem 67
- 5.9.1 HD Audio Controller 68
- 5.9.2 HD Audio Link Bus 68
- 5.9.3 Audio Multistreaming 68
- 5.9.4 Audio Specifications 69
- 5.10.1 Wake-On-LAN Support 71
- 5.10.4 NIC Connector 72
- 5.10.5 NIC Specifications 72
- Integrated Graphics Subsystem 73
- 6.2 Functional Description 74
- Controller 74
- 6.3 Display Modes 76
- 6.4 Upgrading 77
- 6.5 Monitor Connectors 78
- Table 6-4 79
- Power and Signal Distribution 81
- 7.2.2 SFF Power Distribution 82
- Table 7-2 83
- 7.2.3 CMT Power Distribution 84
- 7.2.4 Energy Star Compliancy 85
- 7.3 Power Con trol 86
- Table 7-5 87
- Power Button Actions 87
- Power LED Condition 87
- 7.3.2 Wake Up Events 88
- 7.3.3 Power Management 89
- 7.4 Signal Distribution 90
- Table 7-7. (Continued) 91
- SYSTEM BIOS 93
- 8.2 ROM Flashing 94
- 8.3 Boot Functions 95
- 8.3.4 Boot Error Codes 96
- Table 8-2 97
- 8.4.1 System ID and ROM Type 98
- 8.4.2 Temperature Status 98
- 8.4.3 Drive Fault Prediction 98
- 8.5 SMBIOS 99
- 8.6 USB Legacy Support 100
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