HP dc7800 tower Pointing Device Interface Operation, Keyboard/Pointing Device Interface Connector

Models: dc7800 tower

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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 dc7800 tower manual Pointing Device Interface Operation, Keyboard/Pointing Device Interface Connector, Data, Clk

dc7800 tower specifications

The HP dc7800 Tower is a powerful desktop computer designed for professional and enterprise environments. Known for its stability, performance, and versatility, this model has secured its place in a variety of business settings. Launched in the mid-2000s, it embodies HP’s commitment to quality and innovation.

One of the main features of the HP dc7800 is its form factor. The tower configuration allows for easy upgrades and maintenance, providing ample space for additional hard drives, memory, and other components. This level of accessibility makes it ideal for businesses that need to adapt their systems to changing requirements.

The dc7800 is powered by Intel's Core 2 Duo processors, offering dual-core technology that enhances multitasking capabilities. With clock speeds ranging from 1.8 GHz to 3.0 GHz, this system can handle demanding applications with relative ease. It also supports Intel's vPro technology, which allows for remote management and security features, making it an excellent choice for organizations prioritizing IT control.

Another notable characteristic is the support for up to 8GB of DDR2 RAM. This allows for efficient data processing and improved performance when running multiple applications simultaneously. Additionally, the dc7800 features multiple storage options, accommodating both SATA hard drives and solid-state drives, which can significantly enhance boot times and overall system responsiveness.

Connectivity options on the HP dc7800 are robust. It includes a variety of USB ports, audio jacks, and optional legacy ports, ensuring compatibility with a wide range of peripherals and accessories. Networking capabilities are also prominent, with built-in Gigabit Ethernet providing high-speed internet access.

Furthermore, the desktop tower is designed with energy efficiency in mind. It meets ENERGY STAR certification standards, which not only helps reduce operational costs but also minimizes environmental impact.

Overall, the HP dc7800 Tower embodies a blend of performance, expandability, and energy efficiency, making it a reliable choice for businesses in need of a robust desktop solution. With its legacy of dependability and its suite of modern technologies, it continues to serve as a valuable asset in enterprise environments.