Compaq dc7900 Technical Reference Guide: HP Compaq dc7900 Series Business Desk
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- Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - 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 . Technical Reference Guide HP Compaq dc7900 Series Business Desktop Computers First Edition (September - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 3
Architecture 2-4 2.3.1 Intel Processor Support 2-6 2.3.2 Chipset 2-7 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 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 Power Management Support - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 5
7.2 Power 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 6
8-3 8.3.4 Boot Error Codes 8-4 8.4 Client Management Functions 8-5 8.4.1 System ID and ROM Type 8-6 8.4.2 Temperature Status 8-6 8.5 SMBIOS support 8-7 8.6 USB Legacy Support 8-8 8.7 Management Engine Functions 8-8 A Error Messages and Codes Index vi www.hp.com Technical Reference Guide - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 7
1 Introduction 1.1 About this Guide This guide provides technical information about HP Compaq dc7900 Business PC personal computers that feature Intel processors and the Intel Q45 Express chipset. This document describes in detail the system's design and operation for programmers, engineers, - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 8
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 described in the following subsections. 1.4.1 Special Notices - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 11
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 general purpose open-collector Graphics address re-mapping table graphic user interface hexadecimal hard disk drive hardware hexadecimal - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 12
motion video window variable parameter/value network interface card/controller nickel-metal hydride non-maskable interrupt Non-return-to-zero inverted nanosecond nested task flag National Television Standards Committee non-volatile random access memory www.hp.com Technical Reference Guide - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 13
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-only memory pointer Redundant array of inexpensive disks (drives) random access memory - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 14
(Continued) Acronyms and Abbreviations Description Serial digital video output Single Edge-Connector sequential colour avec memoire (sequential color with memory) sign flag Synchronous Graphics RAM Single instruction multiple data single in-line memory module Self Monitor Analysis Report Technology - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 15
Serial Bus unshielded twisted pair volt 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) Introduction Technical Reference Guide - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 16
Introduction 1-10 www.hp.com Technical Reference Guide - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 18
❏ Diskette drive disable, boot disable, write protect ❏ Power-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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - 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 sockets - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 20
All systems include a serial ATA (SATA) hard drive in the standard configuration. Table 2-2 lists the differences between 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 22
board includes a zero-insertion-force (ZIF) Socket-T designed for mounting an LGA775-type 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 95 watts. Exceeding these limits can result in - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 23
1333-MHz FSB 82801 ICH10-DO 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 (these systems provide 8 external, 3 internal) Gigabit Ethernet controller The I/O controller hub - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 25
: USDT: two SATA interfaces SFF: three SATA interfaces and one eSATA port CMT: four SATA interfaces and one eSATA port 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 Interface The SFF and CMT form factors - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 26
for video memory. Table 2-5 lists the key features of the integrated graphics subsystem. Table 2-5 Integrated Graphics Subsystem Statistics Q45 GMCH Integrated Graphics Controller Recommended for Hi 2D, Entry 3D Bus Type Int. PCI Express Memory Amount 32 MB pre-allocated Memory Type DVMT - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 27
Star 4.0 with 80Plus Bronze-level compliancy 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.com 2-11 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 28
drive, 1 diskette drive (SFF and 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 29
System Overview Table 2-9 Optical Drive 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: 4x/na by media type DVD+RW: 8x/na DVD-RW: 8x/na DVD+R DL: 8x/na DVD-R DL: 8x/na DVD-ROM - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 31
Q45 chipset (Figure 3-1). These systems support PC2-6400 and PC2-5300 DDR2 memory modules. This chapter describes the processor/memory subsystem. Intel Processor FSB I/F XMM1 DIMM or SODIMM XMM2 [1] DIMM Intel Q45 GMCH SDRAM Cntrl Channel A Channel B Note: [1] Not present on USDT form factor - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 32
Memory covered in this guide support Intel Celeron, feature supporting the This feature allows instruction decoding to be support provided by earlier processors, the latest processors include additional MMX instructions that enhance: ❏ Streaming video/audio processing ❏ Photo/video more instructions at - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 35
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-speed modules across both channels) to achieve the best performance. CAUTION: Always power - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 37
bus implementation for systems covered in this guide. For detailed information regarding PCI bus operation, refer to the appropriate PCI specification or the PCI web site: www.pcisig.com. These systems implement the following types of PCI buses: ■ PCI 2.3 - Legacy parallel interface operating at 33 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 38
PCIe port 1 PCIe port 2 PCIe port 3 PCIe port 4 PCIe port 5 PCIe port 6 PCI 2.3 slot 1 PCI 2.3 slot 2 PCI 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 39
the devices on the PCI bus. Table 4-2. PCI Bus Mastering Devices Device REQ/GNT Line PCI Connector Slot 1 REQ0/GNT0 PCI 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 40
serially 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 43
types of hardware interrupts; maskable and nonmaskable. A maskable interrupt can be enabled or disabled within the microprocessor by the use of the STI and CLI instructions attention of the microprocessor. Peripheral functions produce a unique INTA-H (PCI) or IRQ0-15 (ISA) signal that is routed to - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 45
-Ored circuit allows the RTC and configuration memory to draw power from the power supply. The battery is located in a battery holder on the system board and has a life expectancy of three or more years. When the battery has expired it is replaced with a CR2032 or equivalent 3-VDC lithium battery - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 46
extended memory tested Hard drive 1, primary controller 32h Century Hard drive 2, primary controller 33h Miscellaneous flags set by BIOS Hard drive 1, secondary controller 34h International language Hard drive 2, secondary controller 35h APM status flags Enhanced hard drive support 36h - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 47
system is powered up and the user completes the boot sequence successfully, at which time the bit will be cleared. Through Setup, the user can set this function to be used by Alert-On-LAN and or one of three levels of support for a "cover removed" condition: Technical Reference Guide www.hp.com - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 48
System Wakes From Power Button Suspend or soft-off RTC Alarm Suspend or soft-off Wake On LAN (w/NIC) Suspend or soft-off PME Suspend or soft-off Serial Port Ring Suspend or soft-off USB Suspend only Keyboard Suspend only Mouse Suspend only 4-12 www.hp.com Technical Reference Guide - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 49
Power supply overload failure Blinks red 4 times @ 1 Hz [1] 4 Check system board problem [3], Memory error (pre-video) Blinks red 5 times @ 1 Hz [1] 5 Check DIMMs, system board Video error Blinks red 6 times @ 1 Hz [1] 6 Check graphics card or system board PCA failure detected by BIOS - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 51
primary drive) Parallel Port (LPT1) Graphics Controller Parallel Port (LPT3) Serial Port (COM3) Diskette Drive 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 52
security override ■ Serial port detect ■ REQn#/GNTn# sigal control ■ Password enable ■ Boot block enable SIO Controller Functions In addition to the serial and parallel port functions, the SIO controller provides the following specialized functions through GPIO ports: ■ Power/Hard drive LED control - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - 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 hard to a RAID0 or RAID1 dual hard drive RX negative -- -- ✎ The USDT system includes a notebook-type SATA connector (J102) that mates - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 56
SFF and CMT form factors support a diskette drive through a standard 34-pin diskette drive connector. The diskette drive interface function is integrated into the super I/O component. The internal logic of the I/O controller is software-compatible with standard 82077-type logic. The diskette drive - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - 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 is supplied through a separate connector. 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 1 5 7 9 11 13 15 17 19 21 23 25 27 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 58
The serial interface function is provided by the super I/O controller component that includes two NS16C550-compatible UARTs. The UART supports the of 50 feet (or less) of cable between the DTE (computer) and DCE (modem) should be followed to minimize transmission errors. Higher baud rates may - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - 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. - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 60
some signals are redefined depending on the port's operational mode. Figure 5-5. DB-25 5 8 D6 Data 6 9 D7 Data 7 10 ACK- Acknowledge / Interrupt [1] 11 BSY Busy / Wait [1] 12 PE Paper End / User defined [1] 13 SLCT Select / User defined Reset ECP modes: Initialize or Reverse Req. 5-8 www - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 62
The pointing device (typically a mouse) connects to a 6-pin DIN-type connector that is identical to the keyboard connector both physically and electrically. 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 63
system configuration changes without powering down or even rebooting 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 64
: For sub-channel (1.5 MB/s) operation and/or when using sub-standard cable shorter lengths may be allowable and/or necessary. The shield, chassis ground, and power ground should be tied together at the host end but left unconnected at the device end to avoid ground loops. Table 5-10. USB Color - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 65
codec's speaker output is applied to a 1.5-watt amplifier that drives the internal speaker. A device plugged into the Headphone jack or or to powered speakers that contain amplifiers. Front Panel Mic In Rear Panel Line In [1] 82801 ICH HD Audio Interface PC Beep HD Audio Guide www.hp.com 5-13 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - 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 serial data lines; serial data out (SDO, from the controller) and serial data power cycle), the RESET- signal (not shown) will reset all - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 67
90 db (nom) 85 db (nom) Total Harmonic Distortion (THD) Line out Headphone out Microphone / line in -84 db -80 db -78 db Max. Subsystem Power Output to 4-ohm Internal Speaker (with 10% THD): 1.5 watts Gain Step 1.5 db Master Volume Range -58.5 db Frequency Response: ADC/DAC Internal Speaker - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 68
features: ■ VLAN tagging with Windows XP and Linux ■ Multiple VLAN 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 The controller features high and low priority queues and provides - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 69
of system wake up is implemented through an ACPI-compliant OS and is the default power management mode. The following wakeup events may be individually enabled/disabled through the supplied software driver: ■ Magic Packet-Packet with node address repeated 16 times in data portion ✎ The following - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 70
used Figure 5-12. RJ-45 Ethernet TPE Connector (as viewed from rear of chassis) 5.9.5 NIC 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 Compatibility standard - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 71
the use of system memory to provide efficient, economical 2D and 3D performance. All systems provide dual-monitor support in the standard configuration. The SFF and CMT systems include two PCIe graphics slots for upgrading the graphics controller by: ■ Installing a PCIe x16 graphics card in the PCIe - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 72
[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: ■ Rapid pixel and texel rendering - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 73
Integrated Graphics Subsystem The GMA 4500 uses a portion of system memory for instructions, textures, and frame (display) buffering. Using a process called Dynamic Video Memory Technology (DVMT), the controller dynamically allocates display and texture memory amounts according to the needs of the - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 74
Integrated Graphics Subsystem 6.3 Display Modes The GMA supports the following standard display modes for 2D video displays: Table 6-2. will be determined by the following factors: ■ Memory speed and amount ■ Single or dual channel memory ■ Number and type of monitors All systems include both - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 75
installed in the PCIe x4/x16 slot will be limited to x4 operation. ✎ Two PCIe graphics can be installed in an SFF or CMT simultaneously to provide an alternate method for multi-monitor support. In this configuration, the integrated GMA will be disabled. Technical Reference Guide www.hp.com 6-5 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 76
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 -- -- -- NOTE: [1] Fuse automatically resets when excessive load is removed. 6-6 www.hp.com Technical Reference - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 77
Graphics Subsystem 6.5.2 DisplayPort Connector All systems include a DisplayPort connector (Figure 6-3) for attaching a digital monitor. This interface also supports the use of an optional adapter for converting Plug Detect 19 DP Power Return 20 DP Power Technical Reference Guide www.hp.com 6-7 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 78
Integrated Graphics Subsystem 6-8 www.hp.com Technical Reference Guide - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 79
distribution. The 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 uses an - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 80
period. 7.2.2 SFF/CMT Power Distribution The SFF and CMT form factors use a power supply unit contained within the system chassis. Figure 7-2 shows the block diagram for power generation in the SFF and CMT. Front Bezel Power Button Power On System Board CPU, slots, Chipsets, Logic, & Voltage - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 81
sense FC = Fan command FO = Fan off FSpd = Fan speed FS = Fan Sink POK = Power OK (power good) VccP = +12 for CPU nc = not connected Ftach = Fan speed Fcmd = 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 82
CMT form factor. Table 7-3. CMT 365-Watt Power Supply Unit Specifications Input Line Voltage: 115-230 VAC (auto-ranging) Line Frequency Input (AC) Current +3.3 VDC Output +5.08 VDC Output +5.08 AUX Output +12 VDC Output +12 VDC Output (Vcpu) -12 VDC Output Range or Tolerance Min. Current Max - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 84
with the PS On signal. When the PS On signal is asserted, all DC voltages are produced. When PS On is de-asserted, only auxiliary power (+5 AUX) is generated. The +5 AUX voltage is always produced as long , PS On is negated, de-activating the power supply. 7-6 www.hp.com Technical Reference Guide - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 85
@ 1 Hz [1] Power failure (power supply is overloaded). Check storage devices, expansion cards and/or system board (CPU power connector P3). Blinks red 5 times @ 1 Hz [1] Pre-video memory error. Incompatible or incorrectly seated DIMM. Blinks red 6 times @ 1 Hz [1] Pre-video graphics error. On - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 86
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 be asserted - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 87
power button action - OS Restart Required No No No Yes Yes - NOTES: Gn = Global state. Sn = Sleep state. Cn = ACPI state. Dn = PCI state. [1] Power cord is disconnected for this condition. [2] Actual transition time dependent on OS and/or application software. Technical Reference Guide www.hp - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 88
jacks DC input Power supply connector Vccp (PWRCPU) header Control panel (power button, power LED) header Internal speaker header CPU fan header Chassis fan, primary, header Diskette drive connector Front panel audio header Front panel USB header Serial port, secondary, header Serial port, primary - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 90
Power and Signal Distribution 7-12 www.hp.com Technical Reference Guide - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 91
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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 92
is not normally required but may be necessary if changes are made to the unit's operating system, hard drive, or processor. All System BIOS upgrades are available directly from HP. Flashing is done either locally through F10 setup, the HPQFlash program in a Windows environment, or with the FLASHBIN - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 93
The BIOS supports various functions related to the boot process, including those that occur during the Power On Self-Test (POST) routine. 8.3.1 Boot Device Order The default boot device order is as follows: 1. CD-ROM drive (EL Torito CD images) 2. Diskette drive (A:) 3. USB device 4. Hard drive - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 94
None Power failure (power supply is overloaded). Check storage devices, expansion cards and/or system board (CPU power connector P3). Blinks red 5 times @ 1 Hz 5 beeps Pre-video memory error. Incompatible or incorrectly seated DIMM. Blinks red 6 times @ 1 Hz 6 beeps Pre-video graphics error - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 96
BX register. 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 97
Cache Information Port Connector Information System Slots BIOS Language Information System Event Log Information Physical Memory Array Memory Devices Memory Array Mapped Addresses Memory Device Mapped Addresses Cooling Device Structure Hardware Security Structure Boot Integrity Service Entry Point - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 99
@ 1 Hz Power failure (power supply is overloaded). Check storage devices, expansion cards and/or system board (CPU power connector P3). 5 beeps Blinks red 5 times @ 1 Hz Pre-video memory error. Incompatible or incorrectly seated DIMM. 6 beeps Blinks red 6 times @ 1 Hz Pre-video graphics error - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 101
system. 1156-Serial Port A Cable Not Detected Cable from serial port header to I/O connector is missing or not connected properly. 1157-Front Cables Not Detected Cable from front panel USB and audio connectors is missing or not connected properly. 1720-SMART Hard Drive Detects Imminent Failure - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 103
failed 107-01 CMOS RAM test failed 162-xx Options failed (mismatch in drive type) 108-02 CMOS 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 105
from keyboard 303-01 LED test, 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 106
Codes Parallel port Video memory test failed 509-01 320x200 mode, color set 1 test failed 503-01 Video attribute test failed 510-01 640x200 mode test failed 504-01 Video character set test failed 511-01 Screen memory video (graphics) messages. A-8 www.hp.com Technical Reference Guide - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 107
soft limit 6xx-22 Failed to clear change line status 6xx-04 Previously exceeded max hard limit 6xx-23 Failed to set drive type in ID media 6xx-05 Failed to reset controller 6xx-24 Failed to read diskette media 6xx-06 Fatal error while reading 6xx-25 Failed to verify diskette media 6xx - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 108
Codes A.10 Serial Interface Error Messages (11xx-xx) Table A-9. Serial 1101-05 UART cntrl. signal failure 1109-03 Clock reset failure 1101-06 UART THRE bit failure 1109-04 Input line fault 1101-09 Interrupt circuit failure 1150-xx Comm port setup error (run Setup) 1101-10 COM1 set to - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 109
Error Messages and Codes A.11 Modem Communications Error Messages (12xx-xx) Table A-10. Modem Communications Error Messages Message Probable Cause Tone detection failure 1202-12 Time-out waiting for response [2] 1210-XX Modem direct connect test Technical Reference Guide www.hp.com A-11 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 110
Error Messages and Codes Table A-10. (Continued) Modem Communications Error Messages Message Probable Cause Message Probable Cause 1202-13 Data block -xx 1611-xx Table A-11 System Status Error Messages Probable Cause Temperature violation Fan failure A-12 www.hp.com Technical Reference Guide - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 111
limit 17xx-53 Failed drive/head register test 17xx-04 Previously exceeded max.hard error 17xx-54 limit Failed digital input register test 17xx-05 Failed to reset controller 17xx-55 Cylinder 1 error 17xx-06 Fatal error while reading 17xx-56 Failed controller RAM diagnostics 17xx-07 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 112
test xx = 91, Disk 1 failure xx = 15, Hard drive head select test xx = 92, Sec. controller failure xx = 16, Hard drive conditional format 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 113
Codes A.14 Hard Drive Error Messages (19xx-xx) Table A-13 Hard Drive Error Messages Message Probable Cause Message Probable Cause 19xx-01 Drive Change line unset 19xx-04 Drive busy error 19xx-24 Write-protect detected 19xx-14 Drive time-out error 19xx-35 Power-on reset occurred 19xx- - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 114
2417-03 2417-04 2418-01 Table A-14 Video (Graphics) Error Messages Probable Cause Message Probable Cause Video memory test failed 2418-02 EGA shadow RAM test failed Video attribute test failed 2419-01 EGA ROM checksum test failed Video character set test failed 2420-01 EGA attribute test - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 115
6056-xx Token ring reset test failed Ethernet reset test failed 6068-xx Token ring int. loopback test failed Ethernet int. loopback test 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 116
-31 Unrecoverable error 6nyy-92 Side panel not installed 6nyy-32 Controller/drive not connected 6nyy-99 Autoloader reported tape not loaded properly n = 5, Hard drive = 6, CD-ROM drive = 7, Tape drive yy = 00, ID = 03, Power check = 05, Read = 06, SA/Media = 08, Controller = 23, Random read - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - 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 - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 118
Error Messages and Codes A-20 www.hp.com Technical Reference Guide - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 119
, APIC mode 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 mouse (pointing device) interface - Compaq dc7900 | Technical Reference Guide: HP Compaq dc7900 Series Business Desk - Page 120
environmental, 2-11 hard drive, 2-14 optical drive, 2-13 physical 2-12 power supply 2-11 socket, 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
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.