System Support

 

 

 

Table 4-9

 

System I/O Map

 

 

I/O Port

Function

0000..001Fh

DMA Controller 1

 

 

0020..002Dh

Interrupt Controller 1

 

 

002E, 002Fh

Index, Data Ports to SIO Controller (primary)

 

 

0030..003Dh

Interrupt Controller

 

 

0040..0042h

Timer 1

 

 

004E, 004Fh

Index, Data Ports to SIO Controller (secondary)

 

 

0050..0052h

Timer / Counter

 

 

0060..0067h

Microcontroller, NMI Controller (alternating addresses)

 

 

0070..0077h

RTC Controller

 

 

0080..0091h

DMA Controller

 

 

0092h

Port A, Fast A20/Reset Generator

 

 

0093..009Fh

DMA Controller

 

 

00A0..00B1h

Interrupt Controller 2

 

 

00B2h, 00B3h

APM Control/Status Ports

 

 

00B4..00BDh

Interrupt Controller

 

 

00C0..00DFh

DMA Controller 2

 

 

00F0h

Coprocessor error register

 

 

0170..0177h

IDE Controller 2 (active only if standard I/O space is enabled for secondary controller)

 

 

01F0..01F7h

IDE Controller 1 (active only if standard I/O space is enabled for primary controller)

 

 

0278..027Fh

Parallel Port (LPT2)

 

 

02E8..02EFh

Serial Port (COM4)

 

 

02F8..02FFh

Serial Port (COM2)

 

 

0370..0377h

Diskette Drive Controller Secondary Address

 

 

0376h

IDE Controller 2 (active only if standard I/O space is enabled for primary drive)

 

 

0378..037Fh

Parallel Port (LPT1)

 

 

03B0..03DFh

Graphics Controller

 

 

03BC..03BEh

Parallel Port (LPT3)

 

 

03E8..03EFh

Serial Port (COM3)

 

 

03F0..03F5h

Diskette Drive Controller Primary Addresses

 

 

03F6h

IDE Controller 1 (active only if standard I/O space is enabled for sec. drive)

 

 

03F8..03FFh

Serial Port (COM1)

 

 

04D0, 04D1h

Interrupt Controller

 

 

0678..067Fh

Parallel Port (LPT2)

 

 

0778..077Fh

Parallel Port (LPT1)

 

 

07BC..07BEh

Parallel Port (LPT3)

 

 

0CF8h

PCI Configuration Address (dword access only )

 

 

0CF9h

Reset Control Register

 

 

0CFCh

PCI Configuration Data (byte, word, or dword access)

NOTE:

Assume unmarked gaps are unused, reserved, or used by functions that employ variable I/O address mapping. Some ranges may include reserved addresses.

 

Technical Reference Guide

www.hp.com

4-15

Page 51
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HP dc7800 tower manual System I/O Map, Port Function

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.