HP Dc7900 Technical Reference Guide: HP Compaq dc7900 Series Business Desktop
HP Dc7900 - Compaq Business Desktop Manual
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- HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 1
Technical Reference Guide HP Compaq dc7900 Series Business Desktop Computers Document Part Number: 506665-001 September 2008 This document provides information on the design, architecture, function, and capabilities of the HP Compaq dc7900 Series Business Desktop Computers. This information may be - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 2
HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP Guide HP Compaq dc7900 Series Business Desktop Computers First Edition (September 2008) Document Part Number - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 3
2.3.3 Support Components 2-8 2.3.4 System Memory 2-8 2.3.5 Mass Storage 2-9 2.3.6 Serial Interface 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 2.3.10 Audio Subsystem 2-10 2.4 Specifications 2-11 Technical Reference Guide - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 4
Support 5-7 5.5.1 Standard Parallel Port Mode 5-7 5.5.2 Enhanced Parallel Port Mode 5-7 5.5.3 Extended Capabilities Port Mode 5-7 5.5.4 Parallel Interface Connector 5-8 5.6 Keyboard/Pointing Device Interface 5-9 5.6.1 Keyboard Interface Operation 5-9 iv www.hp.com Technical Reference Guide - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 5
Distribution 7-1 7.2.1 USDT Power Distribution 7-1 7.2.2 SFF/CMT Power Distribution 7-2 7.2.3 Energy Star Compliancy 7-6 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.com v - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 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 Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 7
1.1 About this Guide This guide provides technical information about HP Compaq dc7900 Business PC personal codes and information about standard peripheral devices such as keyboards, graphics cards, and communications adapters. This guide can be used either as an online document or in hardcopy form - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 8
Introduction 1.3 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. 1.4 Notational Conventions The notational guidelines used in this guide are - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 9
BIOS basic input/output system bis second/new revision BNC Bayonet Neill-Concelman (connector type) bps or b/s bits per second BSP Bootstrap processor BTO Built to order CAS column address strobe CD compact disk CD-ROM compact disk read-only memory Technical Reference Guide www.hp - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 10
access Desktop management interface dots per inch dynamic random access memory data request Digital video interface Double word (32 bits) extended display identification data extended data out (RAM type) electrically erasable PROM enhanced graphics adapter Electronic Industry Association www.hp.com - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 11
IPL Technical Reference Guide Table 1-1 (Continued) Acronyms and Abbreviations Description extended ISA enhanced parallel port enhanced IDE Extended (RAM type) Floating point unit (numeric or math coprocessor) Frames per second Foot/feet gigabyte Graphics/memory controller .hp.com Introduction 1-5 - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 12
least significant bit/least significant byte logical unit (SCSI) Meter Memory controller hub multimedia extensions Motion Picture Experts Group millisecond most significant bit flag National Television Standards Committee non-volatile random access memory www.hp.com Technical Reference Guide - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 13
computer Printed circuit assembly peripheral component interconnect PCI Express pulse code modulation Personal Computer Memory Card International Association PCI express graphics Power factor correction personal identification number Programmed I/O Part number power-on self test programmable read - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 14
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 Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 15
) Acronyms and Abbreviations Description Uniform resource locator microsecond Universal Serial Bus unshielded twisted pair volt Volts alternating current Volts direct Video RAM watt Wake-On-LAN Windows RAM zero flag zero insertion force (socket) Introduction Technical Reference Guide www.hp.com - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 16
Introduction 1-10 www.hp.com Technical Reference Guide - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 17
to keep pace with the needs of the office enterprise. HP dc7900 USDT HP dc7900 SFF Figure 2-1. HP Compaq dc7900 Business PCs This chapter includes the following topics: ■ Features (2.2) ■ System architecture (2.3) ■ Specifications (2.4) HP dc7900 CMT Technical Reference Guide www.hp.com 2-1 - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 18
-on password ❏ Administrator password ❏ Serial port disable (SFF and CMT form factors only) ❏ Smart Cover (hood) Sense ❏ Smart Cover (hood) Lock (SFF and CMT form factors only) ❏ USB port disable ❏ Intel Standard Manageability support ❏ Intel vPro Technology ❏ HP Virtual Safe Browser ■ PS/2 enhanced - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 19
Matrix by Form Factor USDT SFF CMT Processor types supported Intel Celeron, Pentium dual-core, Core 2 Duo Intel Celeron, Pentium dual-core, Core 2 Duo, Core 2 Quad Intel Celeron, Pentium dual-core, Core 2 Duo, Core 2 Quad Processor wattage (max) 65 W 95 W 95 W Memory: # & type of - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 20
models by form factor. Table 2-2. Architectural Differences By Form Factor Function USDT SFF Memory sockets 2 SODIMMs 4 DIMMs PCIe 2.0 x16 graphics slot No 1 [1] PCIe x4 (x16 connector) graphics slot No 1 [1] # of PCIe 1.1 x1 slots 0 1 [1] # of PCI 2.3 slots 0 1 [3] Serial port - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 21
and CMT. [2] SFF and CMT only [3] 0 slots in USDT, 1 or 2 slots in SFF, 3 slots in CMT [4] 1 MiniCard slot in USDT, 1 slot in SFF and CMT [5] 8 ports accessible externally, 2 ports accessible internally Figure 2-2. HP Compaq dc7900 Business PC Architecture, Block diagram Technical Reference Guide - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 22
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 form factors. Always use the same assembly or one of the same type when replacing the processor. Refer to the applicable Service Reference Guide - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 23
Q45 Express chipset consists of a Graphics Memory Controller Hub (GMCH) and an enhanced PCI 2.3 bus I/F PCI Express x1 LPC bus I/F SMBus I/F SATA I/F HD audio interface RTC/CMOS IRQ controller Power management logic USB 1.1/2.0 controllers supporting 12 ports Technical Reference Guide www.hp.com 2-7 - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 24
supporting up to eight gigabytes of memory while the SFF and CMT form factors provide four DIMM sockets and support a total of 16 gigabytes of memory. ✎ DDR and DDR2 DIMMs are NOT interchangeable. ✎ SODIMM and DIMM components are NOT interchangeable. 2-8 www.hp.com Technical Reference Guide - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 25
Serial Interface The SFF and CMT form factors include a serial port 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 panel. Technical Reference Guide www.hp.com 2-9 - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 26
Memory Technology (DVMT 3.0) for video memory PCI Express Memory Amount 32 MB pre-allocated Memory and a DisplayPort connector and support dual monitor operation. The supported. These systems include a 1.5-watt output amplifier driving an internal speaker, which can be muted with the F10 BIOS - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 27
Supply Electrical Specifications Parameter Value USDT SFF & CMT Standard Optional Maximum Continuous Power: USDT SFF CMT 135 watts 240 watts 365 watts NOTE: Energy Star 4.0 with 80Plus Bronze-level compliancy option available for SFF and CMT form factors. Technical Reference Guide www.hp - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 28
CMT only), and no PCI cards. Desktop (horizontal) configuration. Minitower configuration. For desktop configuration, swap Height and Width dimensions. Applicable to unit in desktop orientation only and assumes reasonable type of load such as a monitor. 2-12 www.hp.com Technical Reference Guide - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 29
Specifications Parameter DVD-ROM HP SuperMulti LightScribe CD-RW/DVD-ROM Combo Combo Interface Type SATA [1] SATA [1] SATA [1] Max. read/write speeds DVD-RAM [2] NOTE [1] USDT models use "slim" drive. [2] Requires special label-etchable media. Technical Reference Guide www.hp.com 2-13 - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 30
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 18 ms 488,397,168 7200 RPM SMART IV 2-14 www.hp.com Technical Reference Guide - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 31
Cntrl 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 processor (3.2) ■ Memory subsystem (3.3) Technical Reference Guide www.hp.com 3-1 - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 32
Memory models covered in this guide support Intel Celeron, Pentium, new feature supporting the branch loop. This feature allows instruction decoding to be removed support provided by earlier processors, the latest processors include additional MMX instructions significantly more instructions at a - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 33
: 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 Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 34
non-ECC PC2-5300 and PC2-6400 DDR2 memory. The USDT form factor supports up to eight gigabytes of memory while the SFF and CMT form factors support up to 16 gigabytes of memory. ✎ The DDR SDRAM "PCxxxx" reference designates bus bandwidth (i.e., a PC2-5300 module can, operating at a 667-MHz effective - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 35
GB 4 GB 4 GB 4 GB 16-GB [3, 4] NOTE: [1] USDT form factor uses SODIMM sockets. SFF and CMT form factors use DIMM sockets. [2] Not present on USDT form factor. [3] Dual-channel symetrical [4] Only SFF and CMT support this size memory HP recommends using symmetrical loading (same-capacity, same - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 36
(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 Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 37
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 Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 38
in 6+6 configuration. 8+4 configuration will have USB 1.1 controller #6 use Function 26, Device 2. [3] SFF and CMT form factors only. [4] CMT form factor only [5] Function is only visible in IDE mode (not visible in AHCI orRAID SATA emulation mode). 4-2 www.hp.com Technical Reference Guide - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 39
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 Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 40
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 Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 41
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 Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 42
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 Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 43
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 Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 44
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 be configured by PCI Configuration Registers 60h..63h to share the standard ISA interrupts (IRQn). ✎ The APIC mode is supported by Windows NT, Windows 2000, and - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 45
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 section 4.5.1. Technical Reference Guide www.hp.com 4-9 - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 46
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 Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 47
User Guide or Maintainance And Service Reference Guide. serial, parallel, and diskette interfaces are a function of the SIO controller. The USB ports intrusion" 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 Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 48
SFF and CMT systems support an optional solenoid-operated locking bar that, when activated, prevents the cover (hood) from being removed. The GPIO ports 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 Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 49
times @ 1 Hz [1] 4 Check system board problem [3], Memory error (pre-video) Blinks red 5 times @ support an auxiliary chassis fan. All fans are controlled through temperature sensing logic on the system board and/or in the power supply. There are some electrical differences between form factors - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 50
System Support The RPM (speed) of all fans is the result of the temperature of the CPU as sensed by speed general-purpose functions of the ICH10 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 Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 51
active only if standard I/O space is enabled for sec. drive) Serial Port (COM1) Interrupt Controller Parallel Port (LPT2) Parallel Port (LPT1) Parallel Port (LPT3) PCI Configuration Address (dword access only ) Reset Control Register PCI Configuration Data (byte, word, or dword access) NOTE: Assume - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 52
PCI interupt request control ■ 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 more information regarding power management. 4-16 www.hp.com Technical Reference Guide - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 53
interfaces (5.2) ■ Diskette drive interface (5.3) ■ Serial interfaces (5.4) ■ Parallel interface support (5.5) ■ Keyboard/pointing device interface (5.6) ■ Universal serial bus interface (5.7) ■ Audio subsystem (5.8) ■ Network interface controller (5.9) Technical Reference Guide www.hp.com 5-1 - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 54
serial ATA (SATA) interfaces that support tranfer rates up to 3.0 Gb/s and RAID data protection functionality. The SFF and CMT form factors can also support RAID array, and the BIOS ROM also supports RAID creation, naming, RX negative -- -- ✎ The USDT system includes a notebook-type SATA - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 55
Input/Output Interfaces 5.2.2 eSATA interface The SFF and CMT form factors provide a SATA/eSATA port (connector P64 on the system board) that can support an external SATA (eSATA) storage device. The eSATA interface provides higher bandwidth than USB 2.0 and Firewire (1394) interfaces. An optional - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 56
Input/Output Interfaces 5.3 Diskette Drive Interface The SFF and CMT form factors support a diskette drive through a standard 34-pin diskette drive connector. The diskette drive interface controller is in a non-operation mode known as the Idle phase. 5-4 www.hp.com Technical Reference Guide - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 57
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 power drive motor 33 GND Ground Ground 34 DSK CHG- Drive door opened indicator Technical Reference Guide www.hp.com 5-5 - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 58
on the system board. The serial interface function is provided by the super I/O controller component that includes two NS16C550-compatible UARTs. The UART supports the standard baud rates up transmission errors. Higher baud rates may require shorter cables. 5-6 www.hp.com Technical Reference Guide - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 59
Support The SFF and CMT form factors include a system board header (J50) that supports an optional parallel bracket/cable assembly that provides a parallel interface for a peripheral device such as a printer. The parallel interface supports the parallel port to be controlled by software. - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 60
the optional parallel bracket/cable assembly. Note that some signals are redefined depending on the port's operational mode. Figure 5-5. DB-25 Parallel Interface Connector (as viewed from rear of . [4] EPP mode: Reset ECP modes: Initialize or Reverse Req. 5-8 www.hp.com Technical Reference Guide - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 61
serial data transfers. The 8042 handles scan code or the 8042) and scan codes from the keyboard. A 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 code. If a parity error or timeout - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 62
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 Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 63
systems. These systems provide eight externally-accessible USB ports, two front panel USB ports (which may be disabled) and six USB ports on the rear panel. In addition, the SFF and CMT form factors support a media reader accessory that uses two USB ports through a system board connection. The USB - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 64
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 Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 65
amplifiers. 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) AD1884A HD as Microphone In Figure 5-9. Audio Subsystem Functional Block Diagram Technical Reference Guide www.hp.com 5-13 - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 66
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 Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 67
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 Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 68
LEDs (Figure 5-11). The support firmware is contained in the system (BIOS) ROM. The NIC can operate support with Windows XP ■ Power management support for ACPI 1.1, PXE 2.0, WOL, ASF 1.0, and IPMI ■ Cisco Etherchannel support ■ Link and Activity LED indicator drivers hp.com Technical Reference Guide - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 69
PCI bus to be asserted, initiating system wake-up from an ACPI S1 or S3 state. 5.9.2 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 Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 70
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 (PXE 3.0, RPL) Yes PCI Express x1 ACPI, PCI Power Management Spec. 5-18 www.hp.com Technical Reference Guide - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 71
memory to provide efficient, economical 2D and 3D performance. All systems provide dual-monitor support in the standard configuration. The SFF and CMT the integrated graphics controller can be re-enabled through the BIOS settings This chapter covers the following subjects: ■ Functional description - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 72
Monitor PCIe x16 Graphics slot [1] Switch GMA 4500 Controller SDRAM Controller DDR2 SDRAM (System Memory) PCIe x4/x16 slot [1] PCIe data ICH10 PCIe I/F NOTE: [1] SFF and CMT form factors only. Figure 6-1. Q45-based Graphics, Block diagram The GMA 4500 provides the following features - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 73
"Approx. Total Memory" label will indicate the amount of video memory. The value will vary according to OS. ✎ Some applications, particularly games that require advanced 3D hardware acceleration, may not install or run correctly on systems using the GMA. Technical Reference Guide www.hp.com 6-3 - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 74
will be determined by the following factors: ■ Memory speed and amount ■ Single or dual channel memory ■ Number and type of monitors All systems provides multimode support through the use of an optional external adapter for connecting a DVI or VGA monitor. 6-4 www.hp.com Technical Reference Guide - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 75
also include a PCIe x16 graphics connector that specifically supports a PCIe x16 graphics card and a PCIe x16 connector that provides PCIe x4 operation for an x4 or x16 PCIe card. These two PCIe slots provide the SFF and CMT form factors with flexible graphics upgrade paths. The upgrade procedure - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 76
and can drive both types of monitors simultaneously. 6.5.1 Analog Monitor Connector All form factors include a legacyVGA connector (Figure 6-2) for attaching an analog video monitor: Figure : [1] Fuse automatically resets when excessive load is removed. 6-6 www.hp.com Technical Reference Guide - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 77
include a DisplayPort connector (Figure 6-3) for attaching a digital monitor. This interface also supports the use of an optional adapter for converting the DisplayPort output to a DVI or 17 AUX Ch (n) 18 Hot Plug Detect 19 DP Power Return 20 DP Power Technical Reference Guide www.hp.com 6-7 - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 78
Integrated Graphics Subsystem 6-8 www.hp.com Technical Reference Guide - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 79
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 form factor USDT - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 80
VDC during the transient period. 7.2.2 SFF/CMT Power Distribution The SFF and CMT form factors use a power supply unit contained CMT. Figure 7-2. SFF Power Generation, Block Diagram Table 7-2 lists the specifications of the SFF power supply unit. Drives 7-2 www.hp.com Technical Reference Guide - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 81
Power and Signal Distribution Table 7-2. SFF 240-Watt Power Supply Unit Specifications Input Line Voltage Line Frequency Input (AC) Current +3.3 VDC Output Fan command [1] This row represents pins 13-24 of connector P1 Figure 7-3. SFF Power Cable Diagram Technical Reference Guide www.hp.com 7-3 - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 82
lists the specifications for the 365-watt power supply used in the CMT form factor. Table 7-3. CMT 365-Watt Power Supply Unit Specifications Input Line Voltage be met at all times to ensure normal operation and specification compliance. [2] Maximum surge duration for +12Vcpu is 1 second with 12-volt - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 83
with the Energy Star 4.0 specification. The standard power supply unit for SFF and CMT systems is Energy Star 3.0-compliant. An Energy Star 4.0 (80Plus Bronze-compliant) power supply unit is available as an option for the SFF and CMT form factors. Technical Reference Guide www.hp.com 7-5 - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 84
Release: If the button is held in for at least four seconds and then released, PS On is negated, de-activating the power supply. 7-6 www.hp.com Technical Reference Guide - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 85
@ 0.5 Hz Suspend state (S1) or suspend to RAM (S3) Blinks red 2 times @ 1 Hz [1] 5 times @ 1 Hz [1] Pre-video memory error. Incompatible or incorrectly seated DIMM. Blinks number of beeps, with 2-second pause between cycles. Beeps stop after 5 cycles. Technical Reference Guide www.hp.com 7-7 - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 86
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 Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 87
BIOS) and software. The system provides the following power management support CPU is executing and data is held in memory. Some peripheral subsystems may be on low . CPU, memory, and most subsystems shut down. Memory image saved . Cn = ACPI state. Dn = PCI state. [1] Power cord is disconnected for - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 88
only CMT only SFF & CMT only SFF & CMT only SFF & CMT only SFF & CMT only SFF & CMT only USDT only SFF & CMT only SFF & CMT only SFF & CMT only SFF & CMT only SFF only SFF & CMT only SFF & CMT only CMT only SFF & CMT only SFF & CMT only SFF and CMT only 7-10 www.hp.com Technical Reference Guide - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 89
Designations Clear CMOS switch Memory slot (black) Memory slot (white) Memory slot (white) Memory slot (white) Processor socket Battery socket Figure 7-5 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 Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 90
Power and Signal Distribution 7-12 www.hp.com Technical Reference Guide - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 91
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 Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 92
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 and re-flashing the system BIOS ROM with a CD or it will not be loaded into the ROM. 8-2 www.hp.com Technical Reference Guide - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 93
BIOS communicates with an EEPROM on each DIMM through the SMBus to obtain data on the following DIMM parameters: ■ Presence ■ Size ■ Type ■ Timing/CAS latency ✎ Refer to Chapter 3, "Processor/Memory Subsystem" for the SPD format and DIMM data specific to this system. Technical Reference Guide www - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 94
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 Hz 7 beeps PCA failure. Check/replace system board. Blinks red 8 times @ 1 Hz 8 beeps Invalid ROM times @ 1 Hz 10 beeps Bad option card. NOTE: - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 95
Functions Table 8-2 provides a partial list of the client management BIOS functions supported by the systems covered in this guide. These functions, designed to support intelligent manageability applications, are HP-specific unless otherwise indicated. Table 8-2. Client Management Functions (INT15 - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 96
. Systems have the following IDs and ROM family types: Table 8-3 System ID Numbers System (Form Factor) Subsystem System ID Device ID USDT 3033h 3036h SFF 3031h 3034h CMT: 3032h 3035h NOTE: For all systems, BIOS ROM Family = 786G1, PnP ID = CPQ0968, and Subsystem vendor ID = 103Ch. The - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 97
SYSTEM BIOS 8.5 SMBIOS In support of the DMI specification, PnP functions 50h and 51h are used to retrieve the SMBIOS data. Function 50h retrieves the number of structures, size of the largest structure, and SMBIOS version. Function 51h retrieves a specific structure. This system supports SMBIOS - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 98
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 Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 99
HP/Compaq BIOS. Not all errors listed in this appendix may be applicable to a particular system model and/or configuration. A.2 Beep/Power LED Codes ✎ Beep connector P3). 5 beeps Blinks red 5 times @ 1 Hz Pre-video memory error. Incompatible or incorrectly seated DIMM. 6 beeps Blinks red 6 - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 100
. 213-Incompatible Memory Module BIOS detected installed DIMM(s) as being not compatible. 214-DIMM Configuration Warning A specific error has occurred in a memory device installed in the identified socket. 216-Memory Size Exceeds Max Installed memory exceeds the maximum supported by the system - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 101
and Codes Table Risers not Detected the system. 1156-Serial Port A Cable Not Detected Cable from serial port header to I/O connector is missing -MultiBay incorrectly installed For integrated MultiBay/ USDT systems: MultiBay device not properly seated. Technical Reference Guide www.hp.com A-3 - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 102
Error Messages and Codes Table A-2. (Continued) Power-On Self Test (POST) Messages Error Message Probable Cause 1801-Microcode Patch Error A processor is installed for which the BIOS ROM has no patch. Check for ROM update. Invalid Electronic Serial Number Electronic serial number has become - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 103
Port 61 bit not at zero 112-01 Speed test Slow mode out of range 105-02 Port CMOS RAM test code may be caused by one of a variety of processor-related problems that may be solved by replacing the processor, although system board replacement may be needed. Technical Reference Guide www.hp - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 104
while restoring block in walking I/O test Increment pattern test failed ECC failure Memory increment pattern test Error while saving memory during increment pattern test Error while restoring memory during increment pattern test Memory random pattern test A-6 www.hp.com Technical Reference Guide - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 105
8042 self-test failed 304-04 No Make code observed 303-02 LED test, reset test failed 304-05 Cannot /disable repeat key feature 303-03 LED test, reset failed 304-06 Unable to return to Normal mode 303-04 LED test, LED command test failed -- -- Technical Reference Guide www.hp.com A-7 - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 106
Codes test failed 402-08 Interrupt test failed 404-xx Parallel port address conflict 402-09 Interrupt test and data reg. failed failed 504-01 Video character set test failed 511-01 Screen memory page test failed 505-01 80x25 mode, 9x14 cell test failed hp.com Technical Reference Guide - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 107
Error Messages and Codes A.9 Diskette Drive Error Messages (6xx-xx) Table A-8. Diskette Drive controller test 610-xx = Diskette drive change line test 611-xx = Pri. diskette drive port addr. conflict 612-xx = Sec. diskette drive port addr. conflict 694-00 = Pin 34 not cut on 360-KB drive 697-00 = - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 108
Error Messages and Codes A.10 Serial Interface Error Messages (11xx-xx) Table A-9. Serial Interface Error Messages Message buffer failure 1109-06 Data line fault 1101-09 Interrupt circuit failure 1150-xx Comm port setup error (run Setup) 1101-10 COM1 set to invalid INT 1151-xx COM1 - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 109
Error Messages and Codes A.11 Modem Communications Error Messages out waiting for dial tone 1201-16 Modem ROM, checksum failure 1205-07 Dial number string too long 1201-17 Tone detect failure 1205-08 Modem time-out waiting direct connect test Technical Reference Guide www.hp.com A-11 - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 110
Error Messages and Codes Table A-10. (Continued) Modem Communications for dial tone 1203-02 Modem external data TIP/RING 1210-07 fail Dial number string too long 1203-03 Modem line termination failure 1210-08 Modem time-out violation Fan failure A-12 www.hp.com Technical Reference Guide - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 111
Messages and Codes A.13 Hard 17xx-06 Fatal error while reading 17xx-56 Failed controller RAM diagnostics 17xx-07 Fatal error while writing 17xx-57 Failed non-translate mode 17xx-48 Failed to move hard drive table to RAM 17xx-72 Bad track limit exceeded 17xx-49 Failed to read media - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 112
Error Messages and Codes NOTE: xx = 00, Hard drive ID test xx = 19, Hard drive power mode test xx = 01, Hard drive format test xx = 20, test xx = 93, Sec. Controller or disk failure xx = 17, Hard drive ECC test xx = 99, Invalid hard drive type A-14 www.hp.com Technical Reference Guide - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 113
Error Messages and Codes A.14 Hard Drive Error Messages (19xx-xx) Table A-13 Hard Drive Error Messages Message Probable Cause Message Probable 1905-xx = Tape read test failed 1906-xx = Tape R/W compare test failed 1907-xx = Tape write-protect failed Technical Reference Guide www.hp.com A-15 - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 114
Codes Message Probable Cause Video memory test failed 2418-02 EGA shadow RAM test failed Video attribute 01 640x480 graphics mode test failed Screen memory page test failed 2432-01 320x200 256 resp. 2478-xx AVGA BitBLT test failed EGA memory test failed 2480-xx AVGA linedraw test failed - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 115
Error Messages and Codes A.17 DVD/CD-ROM Error Messages (33xx-xx) Message 3301-xx 3305-xx Table A-16 DVD/CD-ROM Error Messages Probable failed 6069-xx Token ring ext. loopback test failed Ethernet ext. loopback test failed 6089-xx Token ring open Technical Reference Guide www.hp.com A-17 - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 116
Error Messages and Codes A.19 SCSI Interface Error Messages (65xx-xx, 66xx-xx, 67xx-xx) Table A-18 SCSI Interface Error Messages Message = 00, ID = 03, Power check = 05, Read = 06, SA/Media = 08, Controller = 23, Random read = 28, Media load/unload A-18 www.hp.com Technical Reference Guide - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 117
Error Messages and Codes A.20 Pointing Device Interface Error Messages (8601-xx) Message 8601-01 8601-02 8601-03 8601-04 8601-05 8601 device is inoperative Right mouse button is stuck closed 8602-xx I/F test failed Left block not selected -- -- Technical Reference Guide www.hp.com A-19 - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 118
Error Messages and Codes A-20 www.hp.com Technical Reference Guide - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 119
4-7, 4-8 Audio codec 2-8, 5-13, 5-14 Audio Specifications 5-15 B BIOS upgrading 8-2 boot device order 8-3 Boot error codes8-4 C chipset 2-7 CMOS 4-9 CMOS, clearing 4-9 configuration memory 4-9 D DisplayPort 2-10, 6-2 DisplayPort connector 6-7 Direct Memory Access (DMA) 4-8 Display Modes 6-4 Diskette - HP Dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desktop - Page 120
, processor 2-6, 3-3 system board component designators7-10 system ID 8-7 T Temperature Status 8-7 U Universal Serial Bus (USB) interface 5-11 upgrading BIOS 8-2 upgrading graphics 6-5 V VGA connector 6-6 W Web sites (for additional information 1-1 Index-2 www.hp.com Technical Reference Guide
Technical Reference Guide
HP Compaq dc7900 Series
Business Desktop Computers
Document Part Number: 506665-001
September 2008
This document provides information on the design, architecture, function,
and capabilities of the HP Compaq dc7900 Series Business Desktop
Computers. This information may be used by engineers, technicians,
administrators, or anyone needing detailed information on the products
covered.