HP dc7900 Pointing Device Interface Operation, Keyboard/Pointing Device Interface Connector, Data

Models: dc7900

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Input/Output Interfaces

5.6.2 Pointing Device Interface Operation

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. The operation of the interface (clock and data signal control) is the same as for the keyboard. The pointing device interface uses the IRQ12 interrupt.

5.6.3 Keyboard/Pointing Device Interface Connector

The legacy-light model provides separate PS/2 connectors for the keyboard and pointing device. Both connectors are identical both physically and electrically. Figure 5-7 and Table 5-6 show the connector and pinout of the keyboard/pointing device interface connectors.

Figure 5-7. PS/2 Keyboard or Pointing Device Interface Connector (as viewed from rear of chassis)

Table 5-6.

Keyboard/Pointing 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

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Technical Reference Guide

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HP dc7900 manual Pointing Device Interface Operation, Keyboard/Pointing Device Interface Connector, Data, Clk

dc7900 specifications

The HP dc7900 is a well-regarded desktop solution that serves as a testament to HP's commitment to performance, reliability, and user accessibility. Introduced as part of HP’s Compaq line and designed primarily for business professionals, the dc7900 combines powerful processing capabilities with a compact form factor that suits various office environments.

One of the standout features of the HP dc7900 is its robust configuration options. It typically comes equipped with Intel's Core 2 Duo or Quad processors, giving users the ability to handle demanding applications seamlessly. The inclusion of Intel's technologies, such as Intel vPro, enhances remote management and IT control, making it an ideal choice for businesses looking to streamline their operations.

The dc7900 is designed with flexibility in mind. It offers multiple form factors, including mini-tower, small form factor, and ultra-slim desktop configurations. This variety enables organizations to choose a model that best fits their workspace requirements, maximizing both efficiency and aesthetics. The small footprint models are particularly beneficial in space-constrained environments, while the mini-tower version provides expandability for future upgrades.

In terms of graphics capabilities, the HP dc7900 typically features integrated Intel graphics, with options to install discrete graphics cards for users who require enhanced visual performance. This makes the dc7900 suitable for tasks ranging from standard office applications to more graphics-intensive responsibilities.

Connectivity is another key characteristic of the HP dc7900. It is equipped with a variety of ports, including USB 2.0 and audio jacks, allowing users to connect peripherals easily. Additionally, the dc7900 supports legacy connections, making it easier for businesses with older equipment to integrate new systems without hassle.

Durability and reliability are hallmarks of the HP dc7900. Built with high-quality materials and subjected to rigorous testing, this desktop is designed to withstand the demands of a bustling office environment. Furthermore, HP's comprehensive warranty and support options assure businesses of the reliability of their investment.

The HP dc7900 is not just a powerful desktop; it’s a versatile and dependable solution for modern businesses. With its combination of performance, expandability, and solid build quality, the dc7900 remains a relevant choice for those looking to enhance their productivity and efficiency in the workplace.