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

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Image 51
HP dc7900 manual System I/O Map, Port Function

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.