HP Dc7800 Technical Reference Guide: HP Compaq dc7800 Series Business Desktop
HP Dc7800 - Compaq Business Desktop Manual
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- HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 1
Technical Reference Guide HP Compaq dc7800 Series Business Desktop Computers Document Part Number: 461444-001 October 2007 This document provides information on the design, architecture, function, and capabilities of the HP Compaq dc7800 Series Business Desktop Computers. This information may be - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 2
other countries. Intel, Intel Core 2 Duo, Intel Core 2 Quad, Pentium Dual-Core, Intel Inside, and Celeron are trademarks of Intel Corporation in the U.S. . Technical Reference Guide HP Compaq dc7800 Series Business Desktop Computers First Edition (October 2007) Document Part Number: 461444-001 - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 3
2.3.4 System Memory 2-8 2.3.5 Mass Storage 2-9 2.3.6 Serial and Parallel Interfaces 2-9 2.3.7 Universal Serial Bus Interface 2-9 2.3.8 Network Interface Controller 2-9 2.3.9 Graphics Subsystem 2-10 2.3.10Audio Subsystem 2-10 2.4 Specifications 2-11 Technical Reference Guide www.hp.com iii - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 4
3.3 Memory Subsystem 3-4 3.3.1 Memory Upgrading 3-5 3.3.2 Memory Mapping and Pre-allocation 3-5 4 System Support 4.1 Introduction 4-1 4.2 PCI Bus Overview 4-1 4.2.1 PCI 2.3 Bus Operation 4-1 4.2.2 PCI Express Bus Operation 4-3 4.2.3 Option ROM Mapping 4-4 4.2.4 PCI Interrupts 4-4 4.2.5 PCI - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 5
USDT Power Distribution 7-1 7.2.2 SFF Power Distribution 7-2 7.2.3 CMT Power Distribution 7-4 7.2.4 Energy Star Compliancy 7-5 7.3 Power Control 7-6 7.3.1 Power Button 7-6 7.3.2 Wake Up Events 7-8 7.3.3 Power Management 7-9 7.4 Signal Distribution 7-10 Technical Reference Guide www.hp - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 6
Contents 8 SYSTEM BIOS 8.1 Introduction 8-1 8.2 ROM Flashing 8-2 8.2.1 Upgrading 8-2 8.2.2 Changeable Splash Screen 8-2 8.3 Boot Functions 8-3 8.3.1 Boot Device Order 8-3 8.3.2 Network Boot (F12) Support 8-3 8.3.3 Memory Detection and Configuration 8-3 8.3.4 Boot Error Codes 8-4 8.4 Client - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 7
1 Introduction 1.1 About this Guide This guide provides technical information about HP Compaq dc7800 Business PC personal computers that feature Intel processors and the Intel Q35 Express chipset. This document describes in detail the system's design and operation for programmers, - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 8
Introduction 1-2 www.hp.com Technical Reference Guide - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 9
Introduction 1.4 Serial Number The serial number is located on a sticker placed on the exterior cabinet. The serial number is also written into firmware and may be read with HP Diagnostics or Insight Manager utilities. 1.5 Notational Conventions The notational guidelines used in this guide are - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 10
Analog-to-digital converter ADD or ADD2 Advanced digital display (card) AGP Accelerated graphics port API application programming American Wire Gauge (specification) BAT Basic assurance test BCD binary-coded decimal BIOS basic input/output system bis second/new revision BNC Bayonet - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 11
tube 1. Compaq system management 2. Compaq server management digital-to-analog converter direct current DOS compatibility hole Display Data Channel Double data rate (memory) dual inline memory module Deutche IndustriNorm (connector type) dual inline package direct memory access Desktop management - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 12
frequency modulation fast page mode (RAM type) Floating point unit (numeric or math coprocessor) Frames per second Foot/feet gigabyte Graphics/memory controller hub ground general purpose I/O Data Association interrupt request industry standard architecture www.hp.com Technical Reference Guide - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 13
Technical Reference Guide Table 1-1 (Continued) Acronyms and Abbreviations Description kilobits/kilobytes (x 1024 bits/x 1024 bytes) kilobits per second kilogram kilohertz National Television Standards Committee non-volatile random access memory operating system 1. programmable array logic 2. phase - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 14
PTR RAID RAM RAS rcvr RDRAM RGB RH RMS ROM RPM RTC R/W SATA SCSI SDR SDRAM SDVO SEC SECAM SF 1-8 Table 1-1 (Continued) Acronyms and Abbreviations Description Personal computer Printed circuit assembly peripheral component interconnect PCI Express pulse code modulation Personal Computer Memory Card - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 15
RAM Single instruction multiple data single in-line memory module Self Monitor Analysis Report Technology system management interrupt system management mode system management RAM serial presence detect Sony/Philips Digital Interface (IEC-958 specification) Spare part number standard parallel port - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 16
Acronyms and Abbreviations Description Volts alternating current Volts direct current Video Electronic Standards Association video graphics adapter very large scale integration Video RAM watt Wake-On-LAN Windows RAM zero flag zero insertion force (socket) 1-10 www.hp.com Technical Reference Guide - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 17
to keep pace with the needs of the office enterprise. HP dc7800 USDT HP dc7800 SFF Figure 2-1. HP Comapq dc7800 Business PCs This chapter includes the following topics: ■ Features (2.2) ■ System architecture (2.3) ■ Specifications (2.4) HP dc7800 CMT Technical Reference Guide www.hp.com 2-1 - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 18
) ❏ Hood (cover) sense ❏ Hoodlock (SFF and CMT form factors only) ❏ USB port disable ■ PS/2 enhanced keyboard ■ PS/2 optical scroll mouse ■ Energy Star 4.0 with 80 Plus compliancy standard on USDT form factors (option available on SFF and CMT form factors) 2-2 www.hp.com Technical Reference Guide - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 19
2-1 Feature Difference Matrix by Form Factor USDT SFF CMT Memory: # & type of sockets Maximum memory 2 SODIMM 4GB 4 DIMM 8GB 4 DIMM 8GB Serial ports 0 1 std., 1 opt. [1] 1 std., 1 opt. [1] Parallel ports 0 1 1 DVI-D graphics port 1 0 0 Drive bays: Externally accessible Internal - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 20
By Form Factor Function USDT SFF CMT Memory sockets 2 SODIMMs 4 DIMMs 4 DIMMs PCIe x16 graphics slot? No Yes [1] Yes # of PCIe x1 slots 1 [2] 2 [1] 2 # of PCI 2.3 slots 0 1 [3] 3 Serial / parallel ports 0 1 [4] 1 [4] Parallel ports 0 1 1 SATA interfaces 1 3 4 Notes - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 21
in SFF, 3 slots in CMT [4] 1 MiniCard slot in USDT, 2 slots in SFF, 2 slots in CMT [5] 8 ports accessible externally, 2 ports accessible internally Keyboard Diskette [2] Mouse Power Supply Figure 2-2. HP Comapq dc7800 Business PC Architecture, Block diagram Technical Reference Guide www.hp - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 22
processor package. CAUTION: The USDT form factor can support a processor rated up to 65 watts. The SFF and CMT form factors can support a processor rated up to replacing the processor. Refer to the applicable Service Reference Guide for detailed removal and replacement procedures of the heatsink/fan - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 23
Intel Q35 Express chipset consists of a Graphics Memory Controller Hub (GMCH) and an enhanced I/O SFF and CMT only) SDRAM controller supporting unbuffered, non-ECC PC2-6400 DDR2 DIMMs or SODIMMs 800-, 1066-, or 1333-MHz FSB PCI 2.3 bus I/F PCI /management Technical Reference Guide www.hp.com 2-7 - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 24
. The USDT system provides two SODIMM sockets supporting up to four gigabytes of memory while the SFF and CMT form factors provide four DIMM sockets and support a total of eight gigabytes of memory. ✎ SODIMM and DIMM components are NOT interchangeable. 2-8 www.hp.com Technical Reference Guide - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 25
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 Reference Guide www.hp.com 2-9 - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 26
PCI Express Memory Amount 8 MB pre-allocated Memory supports dual independent display for expanding the desktop viewing area across two monitors. The USDT form factor includes a DVI-D interface for direct connection with a digital video monitor. The graphics subsystem of the SFF and CMT supported. - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 27
-60 Hz 47-63 Hz Energy Star 4.0 with 80 Plus compliancy USDT SFF & CMT Standard Optional Maximum Continuous Power: USDT SFF CMT 135 watts 240 watts 365 watts NOTE: Energy Star 4.0 with 80 Plus compliancy option available for SFF and CMT form factors. Technical Reference Guide www.hp.com 2-11 - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 28
drive (SFF and CMT only), and no PCI cards. [2] Desktop (horizontal) configuration. [3] Minitower configuration. For desktop configuration, swap Height and Width dimensions. [4] Applicable to unit in desktop orientation only and assumes reasonable type of load such as a monitor. 2-12 www.hp.com - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 29
Table 2-9 Diskette Drive Specifications Parameter Measurement Media Type 3.5 in 1.44 MB/720 KB diskette Height 1/3 bay (1 in) Bytes per Sector 512 Sectors per low) Settling Time Latency Average 3 ms/6 ms 94 ms/169 ms 15 ms 100 ms System Overview Technical Reference Guide www.hp.com 2-13 - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 30
Specifications Parameter DVD-ROM DVD/CD-RW SuperMulti CD-RW/DVD-ROM Combo LightScribe Combo Interface Type SATA [1] SATA [1] SATA [1] Max. read/write speeds DVD-RAM 48x/na DVD-RAM: 12x/12x 48x/48x DVD-RAM: 12x/12x USDT models use "slim" drive that uses an IDE interface through SATA bridge - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 31
5400/7200/ 10K RPM [3] Drive Fault Prediction SMART IV SMART IV NOTES: [1] USDT supports 2.5-in. drives only. [2] USDT supports 1.5 Gb/s drives only. [3] USDT supports up to 7200-RPM drives only. [4] Supported by SFF and CMT form factors only. 250 GB [4] 3.5 in SATA 3.0 Gb/s Yes 1.0 ms 11 ms - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 32
System Overview 2-16 www.hp.com Technical Reference Guide - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 33
Channel A Channel B Note: [1] Not present on USDT form factor. DIMM or SODIMM XMM3 DIMM XMM4 [1] Figure 3-1. Processor/Memory Subsystem Architecture This chapter includes the following topics: ■ Intel Pentium processor (3.2) ■ Memory subsystem (3.3) Technical Reference Guide www.hp.com 3-1 - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 34
Memory covered in this guide support Intel Celeron, supported Intel processors include: ■ Dual- feature supporting the This feature allows instruction decoding to be support provided by previous Pentium processors, the Pentium 4 processor includes an additional 144 MMX instructions more instructions at - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 35
: The USDT form factor can support a processor with a maximum power consumption of 65 watts. The SFF and CMT form factors can support a processor with a maximum power consumption of 95 watts. Exceeding these limits can result in system damage and lost data. Technical Reference Guide www.hp.com - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 36
systems complies with the JEDEC specification for 128-byte EEPROMs. This system also provides support for 256-byte EEPROMs to include additional HP-added features such as part number and serial number. If BIOS detects an unsupported memory module, a "memory incompatible" message will be displayed - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 37
GB none 2 GB none 4-GB (dual-channel symetrical) 2 GB 2-GB 2 GB 2 GB 8-GB (dual-channel symetrical) NOTE: [1] USDT form factor uses SODIMM sockets. SFF and CMT form factors use DIMM sockets. [2] Not present on USDT form factor. HP recommends using symmetrical loading (same-capacity, same - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 38
(for maximum of 8 gigabytes) ✎ All locations in memory are cacheable. Base memory is always mapped to DRAM. The next 128 KB fixed memory area can, through the north bridge, be mapped to DRAM or to PCI space. Graphics RAM area is mapped to PCI locations. 3-6 www.hp.com Technical Reference Guide - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 39
using auto-incremented addressing. Devices on the PCI bus must comply with PCI protocol that allows configuration of that device by software. In this system, configuration mechanism #1 (as described in the PCI Local Bus specification Rev. 2.3) is employed. Technical Reference Guide www.hp.com 4-1 - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 40
[1] Function not used in these systems. [2] Mapping for USB 1.1 Controller #4 if USB ports 9 and 10 and USB 2.0 Controller #2 are disabled. Otherwise, mapping for USB 1.1 controller #4 is F0:D25. [3] SFF and CMT form factors only. [4] CMT form factor only 4-2 www.hp.com Technical Reference Guide - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 41
Connector Slot 2 REQ1/GNT1 PCI Connector Slot 3 REQ2/GNT2 Note [1] [1] [2] NOTE: [1] SFF and CMT form factors only. [2] CMT form factor only PCI bus arbitration is based on a round-robin scheme that complies with the fairness algorithm specified by the PCI specification. The bus parking policy - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 42
Support This system complies with the PCI Power Management Interface Specification (rev 1.0). The PCI Power Management Enable (PME-) signal is supported by the chipset and allows compliant PCI peripherals to initiate the power management routine. 4-4 www.hp.com Technical Reference Guide - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 43
4.2.6 PCI Connectors PCI 2.3 Connector A1 System Support A49 A52 A62 B2 B49 B52 B62 Figure 4-2. 32-bit, 5.0-volt PCI 2.3 Bus Connector Pin B Signal 01 -12 VDC 02 TCK 03 GND 04 BE0- +3.3 VDC AD06 AD04 GND AD02 AD00 +5 VDC REQ64+5 VDC +5 VDC Technical Reference Guide www.hp.com 4-5 - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 44
System Support PCI Express Connectors A1 A11 A12 A18 x1 Connector A82 x16 Connector B1 B11 B12 B82 Figure 4-3. PCI Express Bus Connectors Pin B Signal 01 +12 VDC 02 +12 VDC 03 RSVD PERn13 GND GND PERp14 PERn14 GND GND PERp15 PERn15 GND 4-6 www.hp.com Technical Reference Guide - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 45
Support and CLI instructions. A INTA-H (PCI) or services the peripheral as appropriate. Most IRQs are routed through the I/O controller of the super I/O component, which provides the serializing function. A serialized lowest number) PCI interrupt signals (PIRQA-..PIRQH-) for use by PCI devices. The PCI - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 46
System Support System Board Connector PCI slot 1 [1] PCI slot 2 [1] PCI slot 3 [2] PIRQ A Table 4-5. PCI Interrupt Distribution System Interrupts PIRQ B PIRQ C PIRQ D PIRQ E PIRQ F A B D A C D PIRQ G C B A PIRQ H D C B NOTES: [1] SFF and CMT only [2] CMT only The PCI interrupts can - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 47
memory area. All locations of the standard memory area (00-7Fh) can be directly accessed using conventional OUT and IN assembly language instructions through I/O ports 70h/71h, although the suggested method is to use the INT15 AX=E823h BIOS yellow) for at least 5 seconds. 5. Replace the chassis hood - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 48
System Support 4.4.2 Standard CMOS Locations Table 4-6 describes standard configuration memory locations 0Ah-3Fh. These locations are accessible through using OUT/IN assembly language instructions using port 70/71h or BIOS function INT15, AX=E823h. Location 00-0Dh 0Eh 0Fh 10h 11h 12h 13h 14h 15h - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 49
User Guide or Maintainance And Service Reference Guide. serial, parallel, and diskette interfaces are a function of the SCH5317 I/O controller. The USB ports " event by setting a specific bit. This bit will remain support for a "cover removed" condition: Technical Reference Guide www.hp.com 4-11 - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 50
up ("wake-up") by events defined by the ACPI 2.0 specification. The ACPI wake-up events supported by this system are listed as follows: Table 4-7. ACPI Serial Port Ring Suspend or soft-off USB Suspend only Keyboard Suspend only Mouse Suspend only 4-12 www.hp.com Technical Reference Guide - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 51
after 2 second pause. [2] Beeps are produced by the internal chassis speaker. [3] Check that CPU power connector P3 is plugged in. 4.5.4 Thermal Sensing and Cooling All systems feature a variable-speed fan mounted as part of the processor heatsink assembly. All systems also provide or support an - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 52
System Support ✎ Units using chassis and CPU fans must have both fans connected to their corresponding headers to ensure functions of the ICH9 and I/O controller. 4.6.1 System I/O Map Table 4-9 lists the fixed addresses of the input/output (I/O) ports. 4-14 www.hp.com Technical Reference Guide - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 53
Support I/O Port enabled for primary controller) Parallel Port (LPT2) Serial Port (COM4) Serial Port (COM2) Diskette Drive Controller ports. These systems use GPIO ports and associate registers of the ICH9 for the following functions: ■ PCI interupt request control Technical Reference Guide www.hp - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 54
Support ■ Chassis and board ID ■ Hood (cover) sensor and lock detect ■ Media card reader detect ■ S4 state indicator ■ USB port over-current detect ■ Flash security override ■ Serial port detect chapter 7 for more information regarding power management. 4-16 www.hp.com Technical Reference Guide - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 55
provide input and output (I/O) porting of data and that are controlled Serial interfaces (5.5) ■ Parallel interface (5.6) ■ Keyboard/pointing device interface (5.7) ■ Universal serial bus interface (5.8) ■ Audio subsystem (5.9) ■ Network interface controller (5.10) Technical Reference Guide www.hp - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 56
serial ATA (SATA) interfaces that support tranfer rates up to 3.0 Gb/s and RAID dual drive arrays. A software solution is included that provides full management and status reporting of the RAID array, and the BIOS ROM also supports RAID creation, naming, and deletion of RAID ✎ The USDT system includes - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 57
Interface The USDT system board includes a SATA-to-PATA bridge and slim IDE connector that supports an IDE-type optical disk drive. The pinout for this connector is listed in Table 5-2 The 44-pin slim IDE connector 41 5V 42 5V 22 GND 43 GND 44 Reserved Technical Reference Guide www.hp.com 5-3 - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 58
Input/Output Interfaces 5.4 Diskette Drive Interface The SFF and CMT form factors support a diskette drive through a standard 34-pin diskette drive connector. Selected models come standard controller is in a non-operation mode known as the Idle phase. 5-4 www.hp.com Technical Reference Guide - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 59
Input/Output Interfaces The SFF and CMT form factors use a standard 34-pin connector for diskette drives (refer to Figure 5-3 and Table 5-3 for the pinout). Drive Activates drive motor 33 GND Ground Ground 34 DSK CHG- Drive door opened indicator Technical Reference Guide www.hp.com 5-5 - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 60
Interface Systems covered in this guide may include one RS-232-C type serial interface to transmit and receive asynchronous serial data with external devices. Some systems may allow the installation of a second serial interface through an adapter that consists of a PCI bracket and a cable that - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 61
guide port yields the last data byte that was written. 5.6.2 Enhanced Parallel Port Mode In Enhanced Parallel Port Port Mode The Extended Capabilities Port (ECP) mode, like EPP, also uses a hardware protocol-based design that supports allow the parallel port to be controlled by software. In - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 62
Note that some signals are redefined depending on the port's operational mode. Figure 5-5. DB-25 Parallel 10 ACK- Data 7 Acknowledge / Interrupt [1] 22 GND 23 GND Ground Ground 11 BSY Busy / Wait [1] 24 GND Ground 12 PE 13 SLCT Paper End / User defined [1] hp.com Technical Reference Guide - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 63
the 8042. The data is then transferred serially, LSb first, to the keyboard (Figure 5-6. 8042-To-Keyboard Transmission of Code EDh, Timing Diagram Control of the data and clock code. If a parity error or timeout occurs, a Resend command is sent to the 8042. Technical Reference Guide www.hp.com 5-9 - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 64
Device Connector Pinout Pin Signal Description Pin Signal Description 1 DATA Data 4 + 5 VDC Power 2 NC Not Connected 5 CLK Clock 3 GND Ground 6 NC Not Connected 5-10 www.hp.com Technical Reference Guide - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 65
. USB Table 5-7. ICH9 USB Port Mapping ICH9 Controller Signals USB Connector Location USDT, SFF Form Factors CMT Form Factor USB 1.1 #1, USB 2.0 #1 Data 0P, 0N Data 1P, 1N System board header P150 System board header P150 Rear panel dual USB stack w/RJ-45 Rear panel dual USB stack w/RJ-45 - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 66
longer than sixteen feet for full-channel (12 MB/s) operation, depending on cable specification (see following table). Table 5-9. USB Cable Length Data Conductor Size Resistance Maximum 10. USB Color Code Signal Insulation color Data + Green Data - White Vcc Red Ground Black 5-12 - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 67
Front Panel Mic In Rear Panel Line In [1] 82801 ICH HD Audio Interface PC Beep HD Audio I/F Header P23 Mic Audio (L/R) Line Audio (L/R) Speaker Audio (mono) AD1884 re-configured as Microphone In Figure 5-9. Audio Subsystem Functional Block Diagram Technical Reference Guide www.hp.com 5-13 - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 68
PCI Express device that is integrated into the 82801 ICH component and supports the following functions: ■ Read/write access to audio codec registers ■ Support Interface includes two serial data lines; serial data out (SDO, from the controller) and serial data in ( hp.com Technical Reference Guide - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 69
for the HD Audio subsystem are listed in Table 5-11. Table 5-11. HD Audio Subsystem Specifications Parameter Measurement Sampling Rates: DAC ADC 44.1-, 48-, 96-, & 192-KHz 44.1-, 48 Response: ADC/DAC Internal Speaker 20- 20000 Hz 450-20000 Hz Technical Reference Guide www.hp.com 5-15 - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 70
11). The support firmware for the BCM5752 component is contained in the system (BIOS) ROM. The support with Windows XP ■ Power management support for ACPI 1.1, PXE 2.0, WOL, ASF 1.0, IPMI, AMT 3.0 ■ Cisco Etherchannel support ■ Link and Activity LED indicator drivers hp.com Technical Reference Guide - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 71
PCI bus to be asserted, initiating system wake-up from an ACPI S1 or S3 state. 5.10.2 Alert Standard Format Support Alert Standard Format (ASF) support portion ✎ The following functions are supported in NDIS5 drivers but implemented through remote management software Guide www.hp.com 5-17 - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 72
Specifications Parameter Modes Supported Standards Compliance OS Driver Support Boot ROM Support F12 BIOS Support Bus Inteface Power Management Support Table 5-12. NIC Specifications Boot Agent (PXE 3.0, RPL) Yes PCI Express x1 ACPI, PCI Power Management Spec. 5-18 www.hp.com Technical Reference - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 73
subsystem employs the use of system memory to provide efficient, economical 2D and 3D performance. The SFF and CMT systems may be upgraded/modified by : ■ Functional description (6.2) ■ Display Modes (6.3) ■ Upgrading (6.4) ■ Monitor connectors (6.5) Technical Reference Guide www.hp.com 6-1 - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 74
allowing tiled memory addressing, deep display buffering, and dynamic data management ■ Provides two serial digital video out (SDVO) channels for use by an appropriate ADD2 accessory card (SFF and CMT form factors only) ■ Drives a DVI monitor directly (USDT form factor only) 6-2 www.hp.com - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 75
alpha stretch blithering up to 2048 x 1536 w/32-bit color @ 75 Hz refresh (QVGA) ■ 3D engine supporting Z-bias and up to 1600 x 1200 w/32-bit color @ 85 hz refresh The IGC uses a portion of system memory for instructions, textures, and frame (display) buffering. Using a process called Dynamic Video - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 76
60 Hz 1920 x 1440 85 Hz 60 Hz 2048 x 1536 75 Hz 60 Hz The highest resolution available will be determined by the following factors: ■ Memory speed and amount ■ Single or dual channel memory ■ Number and type of monitors 6-4 www.hp.com Technical Reference Guide - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 77
card. Depending on accessory, upgrading through the PCI Express x16 slot can provide digital monitor support and/or dual-monitor support allowing display-cloning or extended desktop functionality. Software drivers may need to be downloaded for specific cards. ✎ Two SDVO channels are provided by - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 78
USDT system also includes a DVI-D connector for attaching a digital monitor. 6.5.1 Analog Monitor Connector These systems includes a standard VGA connector (Figure 6-2) for attaching an analog video monitor: Figure 6-2. DB-15 Analog VGA Monitor removed. 6-6 www.hp.com Technical Reference Guide - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 79
Monitor Connector The USDT system includes a DVI-D connector for attaching a digital video monitor. Figure 6-3. DVI-D Digital Monitor Connector, (as viewed from rear of chassis). Table 6-4. DB-15 Monitor 23 TMDS Clock + 12 TMDS Data 3- 24 TMDS Clock - Technical Reference Guide www.hp.com 6-7 - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 80
Integrated Graphics Subsystem 6-8 www.hp.com Technical Reference Guide - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 81
USDT form factor uses an external ("brick") supply while the SFF and CMT form factors use a power supply unit contained within the system chassis. The subassemblies are not interchangeable between the three form factors. 7.2.1 USDT Power Distribution The USDT Power Button USDT Chassis - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 82
specifications of the external supply. Table 7-1. USDT 135-Watt Power Supply Unit Specifications power ( - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 83
Table 7-2. SFF 240-Watt Power Supply Unit Specifications Input Line NOTES: Total continuous power should not exceed 240 watts. Total surge power ( - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 84
.. Maximum combined power of +5 and +3.3 VDC is 160 watts. [1] Minimum loading requirements must be met at all times to ensure normal operation and specification compliance. [2] Maximum surge duration for +12Vcpu is 1 second with 12-volt tolerance +/- 10%. 7-4 www.hp.com Technical Reference Guide - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 85
SFF and CMT systems is Energy Star 3.0-compliant. An Energy Star 4.0 (80 Plus-compliant) power supply unit is used for the SFF and CMT form factors in select configurations. The standard USDT power supply unit is compliant with the Energy Star 4.0 specification. Technical Reference Guide www.hp - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 86
then initializes. ACPI four-second counter is not active. Negative four-second counter is not active. Pressed and Released Under Four Seconds: four-second counter. Software should clear the button status bit within four seconds Seconds Before Release: If the button is held in for at least four seconds - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 87
dual @ 0.5 Hz Suspend state (S1) or suspend to RAM (S3) Blinks red 2 times @ 1 Hz [1] times @ 1 Hz [1] Pre-video memory error. Incompatible or incorrectly seated DIMM. number of beeps, with 2-second pause between cycles. Beeps stop after 5 cycles. Technical Reference Guide www.hp.com 7-7 - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 88
Packet" and wake the system up from sleep mode through the assertion of the PME- signal on the PCI bus. Refer to Chapter 5, "Network Support" for more information. Modem Ring A ring condition on a serial port can be detected by the power control logic and, if so configured, cause the PS On signal to - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 89
firmware (BIOS) and software. The system provides the following power management support: ■ and data is held in memory. Some peripheral subsystems may be on low power. Monitor is blanked. G1, S2/3, Sleep state. Cn = ACPI state. Dn = PCI state. [1] Power cord is disconnected for this condition. - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 90
header Notes SFF & CMT only CMT only CMT only SFF & CMT only SFF & CMT only SFF & CMT only SFF & CMT only USDT only SFF & CMT only SFF & CMT only n/a USDT only SFF & CMT only CMT only SFF only SFF & CMT only SFF & CMT only CMT only CMT only USDT only 7-10 www.hp.com Technical Reference Guide - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 91
Designations Clear CMOS switch Memory slot (black) Memory slot (white) Memory slot (white) Memory slot (white) Processor socket Battery socket Figure 7-6 shows pinouts of headers used on the sytem boards. SFF & CMT only SFF & CMT only Power Button/LED, HD LED Header P5 (USDT, SFF) HD LED + 1 HD - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 92
Power and Signal Distribution 7-12 www.hp.com Technical Reference Guide - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 93
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 - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 94
to recover from a failed flashing of the system BIOS ROM. If the system BIOS ROM fails the flash check, the boot block code provides the minimum amount of support necessary to allow booting the system from the or it will not be loaded into the ROM. 8-2 www.hp.com Technical Reference Guide - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 95
Execution Environment (PXE) ROM and can boot with a NetPC-compliant server. 8.3.3 Memory Detection and Configuration This system uses the Serial Presence Detect (SPD) method of determining the installed DIMM configuration. The BIOS communicates with an EEPROM on each DIMM through the SMBus to obtain - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 96
supported by the DIMMs. 3. Determine the memory size for each DIMM and program the GMCH accordingly. 4. Enable refresh. 8.3.4 Boot Error Codes The BIOS (CPU power connector P3). 5 beeps Pre-video memory error. Incompatible or incorrectly seated DIMM. 6 beeps Pre-video graphics error. On - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 97
BIOS functions supported by the systems covered in this guide. These functions, designed to support intelligent manageability applications, are HP-specific Get chassis serial number Real, 16-, & 32-bit Prot. E820h [1] Get system memory map Real E81Ah Write chassis serial number Real E81Bh - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 98
Numbers System (Form Factor) Subsystem System ID Device ID USDT 0AA4h 281Ah SFF 0AA8h 2818h CMT: 0AACh 2819h NOTE: For all systems, BIOS ROM Critical condition. 8.4.3 Drive Fault Prediction The BIOS directly supports Drive Fault Prediction for IDE (ATA)- hp.com Technical Reference Guide - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 99
, and SMBIOS version. Function 51h retrieves a specific structure. This system supports SMBIOS version 2.4 and the structure types listed in the following table: Type 0 1 2 3 4 7 8 9 13 15 16 17 19 20 31 32 Table 8-3 System ID Numbers Data BIOS Information System Information Base board information - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 100
SYSTEM BIOS 8.6 USB Legacy Support The system BIOS ROM checks the USB port, during POST, for the presence of a USB keyboard. This allows a system with only a USB keyboard to be used during ROM-based setup and also on a system with an OS that does not include a USB driver. On such a system a - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 101
4-7 interrupts, hardware 4-7 interrupts, PCI 4-7 K keyboard interface 5-9 L LED indications, boot error code 8-4 LED indications, power button status 7-7 M Management engine 8-8 Memory, system 2-8, 3-4 memory allocation 3-5, 6-3 memory map 3-5 model numbering 1-2 mouse (pointing device) interface - HP Dc7800 | Technical Reference Guide: HP Compaq dc7800 Series Business Desktop - Page 102
5-6 Serial Interface Connector 5-6 serial number 1-3 Smart Cover Lock 4-22 Smart (hood) Cover Sensor 2-2, 4-21 SMBIOS 8-17 SPD address map 3-7 specifications physical 2-26 socket, processor 2-2 system ID 8-16 T Temperature Status 8-16 U Universal Serial Bus (USB) interface 5-11 upgrading BIOS
Technical Reference Guide
HP Compaq dc7800 Series
Business Desktop Computers
Document Part Number: 461444-001
October 2007
This document provides information on the design, architecture, function,
and capabilities of the HP Compaq dc7800 Series Business Desktop
Computers. This information may be used by engineers, technicians,
administrators, or anyone needing detailed information on the products
covered.