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HP Dc7800 Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 25

Mass Storage, 3.6 Serial and Parallel Interfaces, 3.7 Universal Serial Bus Interface, 3.8

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System Overview 2.3.5 Mass Storage All models support at least two mass storage devices, with one being externally accessible for removable media. These systems provide the following interfaces for internal storage devices: USDT: one SATA interface, one SATA-to-PATA bridge/interface for a Slimline optical drive SFF: three SATA interfaces CMT: four SATA interfaces These systems may be preconfigured or upgraded with a SATA hard drive and one removable media drive such as a CD-ROM drive. 2.3.6 Serial and Parallel Interfaces The SFF and CMT form factors include a serial port and a parallel port, both of which are accessible at the rear of the chassis. The SFF and CMT form factors may be upgraded with a second serial port option. The serial interface is RS-232-C/16550-compatible and supports standard baud rates up to 115,200 as well as two high-speed baud rates of 230K and 460K. The parallel interface is Enhanced Parallel Port (EPP1.9) and Enhanced Capability Port (ECP) compatible, and supports bi-directional data transfers. 2.3.7 Universal Serial Bus Interface All models provide ten Universal Serial Bus (USB) ports. Two ports are accessible at the front of the unit, six ports are accessible on the rear panel, and two ports are accessible on the system board. The SFF and CMT form factors support a media card reader module that connects to the two internal ports. These systems support USB 1.1 and 2.0 functionality on all ports. 2.3.8 Network Interface Controller All models feature an Intel gigabit Network Interface Controller (NIC) integrated on the system board. The controller provides automatic selection of 10BASE-T, 100BASE-TX, or 1000BASE-T operation with a local area network and includes power-down, wake-up, Alert-On-LAN (AOL), Alert Standard Format (ASF), and Active Management Technology (AMT) features. An RJ-45 connector with status LEDs is provided on the rear panel. Technical Reference Guide www.hp.com 2-9

Section	Page
Title	1
Table of Contents	3
Chapter 1: Introduction	7
1.1 About this Guide	7
1.1.1 Online Viewing	7
1.1.2 Hardcopy	7
1.2 Additional Information Sources	7
1.3 Model Numbering Convention	7
1.4 Serial Number	9
1.5 Notational Conventions	9
1.5.1 Special Notices	9
1.5.2 Values	9
1.5.3 Ranges	9
1.6 Common Acronyms and Abbreviations	10
Chapter 2: System Overview	17
2.1 Introduction	17
2.2 Features	18
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
2.3.6 Serial and Parallel Interfaces	25
2.3.7 Universal Serial Bus Interface	25
2.3.8 Network Interface Controller	25
2.3.9 Graphics Subsystem	26
2.3.10 Audio Subsystem	26
2.4 Specifications	27
Chapter 3: Processor/Memory Subsystem	33
3.1 Introduction	33
3.2 Intel Processors	34
3.2.1 Intel Processor Overview	34
3.2.2 Processor Changing/Upgrading	35
3.3 Memory Subsystem	36
3.3.1 Memory Upgrading	37
3.3.2 Memory Mapping and Pre-allocation	37
Chapter 4: System Support	39
4.1 Introduction	39
4.2 PCI Bus Overview	39
4.2.1 PCI 2.3 Bus Operation	39
4.2.2 PCI Express Bus Operation	41
4.2.3 Option ROM Mapping	42
4.2.4 PCI Interrupts	42
4.2.5 PCI Power Management Support	42
4.2.6 PCI Connectors	43
4.3 System Resources	45
4.3.1 Interrupts	45
4.3.2 Direct Memory Access	46
4.4 Real-Time Clock and Configuration Memory	47
4.4.1 Clearing CMOS	47
4.4.2 Standard CMOS Locations	48
4.5 System Management	48
4.5.1 Security Functions	48
4.5.2 Power Management	50
4.5.3 System Status	51
4.5.4 Thermal Sensing and Cooling	51
4.6 Register Map and Miscellaneous Functions	52
4.6.1 System I/O Map	52
4.6.2 GPIO Functions	53
Chapter 5: Input/Output Interfaces	55
5.1 Introduction	55
5.2 SATA Interface	56
5.3 PATA Interface	57
5.4 Diskette Drive Interface	58
5.5 Serial Interface	60
5.6 Parallel Interface	61
5.6.1 Standard Parallel Port Mode	61
5.6.2 Enhanced Parallel Port Mode	61
5.6.3 Extended Capabilities Port Mode	61
5.6.4 Parallel Interface Connector	62
5.7 Keyboard/Pointing Device Interface	63
5.7.1 Keyboard Interface Operation	63
5.7.2 Pointing Device Interface Operation	64
5.7.3 Keyboard/Pointing Device Interface Connector	64
5.8 Universal Serial Bus Interface	65
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 Network Interface Controller	70
5.10.1 Wake-On-LAN Support	71
5.10.2 Alert Standard Format Support	71
5.10.3 Power Management Support	71
5.10.4 NIC Connector	72
5.10.5 NIC Specifications	72
Chapter 6: Integrated Graphics	73
6.1 Introduction	73
6.2 Functional Description	74
6.3 Display Modes	76
6.4 Upgrading	77
6.5 Monitor Connectors	78
6.5.1 Analog Monitor Connector	78
6.5.2 Digital Monitor Connector	79
Chapter 7: Power and Signal Distribution	81
7.1 Introduction	81
7.2 Power Distribution	81
7.2.1 USDT Power Distribution	81
7.2.2 SFF Power Distribution	82
7.2.3 CMT Power Distribution	84
7.2.4 Energy Star Compliancy	85
7.3 Power Control	86
7.3.1 Power Button	86
7.3.2 Wake Up Events	88
7.3.3 Power Management	89
7.4 Signal Distribution	90
Chapter 8: System BIOS	93
8.1 Introduction	93
8.2 ROM Flashing	94
8.2.1 Upgrading	94
8.2.2 Changeable Splash Screen	94
8.3 Boot Functions	95
8.3.1 Boot Device Order	95
8.3.2 Network Boot (F12) Support	95
8.3.3 Memory Detection and Configuration	95
8.3.4 Boot Error Codes	96
8.4 Client Management Functions	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
8.7 Management Engine Functions	100

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Technical Reference Guide

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2-9

System Overview

2.3.5 Mass Storage

All models support at least two mass storage devices, with one being externally accessible for

removable media. These systems provide the following interfaces for internal storage devices:

USDT: one SATA interface, one SATA-to-PATA bridge/interface for a Slimline optical drive

SFF: three SATA interfaces

CMT: four SATA interfaces

These systems may be preconfigured or upgraded with a SATA hard drive and one removable

media drive such as a CD-ROM drive.

2.3.6 Serial and Parallel Interfaces

The SFF and CMT form factors include a serial port and a parallel port, both of which are

accessible at the rear of the chassis. The SFF and CMT form factors may be upgraded with a

second serial port option.

The serial interface is RS-232-C/16550-compatible and supports standard baud rates up to

115,200 as well as two high-speed baud rates of 230K and 460K. The parallel interface is

Enhanced Parallel Port (EPP1.9) and Enhanced Capability Port (ECP) compatible, and supports

bi-directional data transfers.

2.3.7 Universal Serial Bus Interface

All models provide ten Universal Serial Bus (USB) ports. Two ports are accessible at the front of

the unit, six ports are accessible on the rear panel, and two ports are accessible on the system

board. The SFF and CMT form factors support a media card reader module that connects to the

two internal ports. These systems support USB 1.1 and 2.0 functionality on all ports.

2.3.8 Network Interface Controller

All models feature an Intel gigabit Network Interface Controller (NIC) integrated on the system

board. The controller provides automatic selection of 10BASE-T, 100BASE-TX, or

1000BASE-T operation with a local area network and includes power-down, wake-up,

Alert-On-LAN (AOL), Alert Standard Format (ASF), and Active Management Technology

(AMT) features. An RJ-45 connector with status LEDs is provided on the rear panel.