. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 6-4 Continued

 

I/O Address (Hex)

System Function (Shipping Configuration)

 

 

 

 

170

- 177

Hard Drive Secondary Registers

 

 

 

 

178

- 1EF

Unused

 

 

 

1F0 - 1F7

Hard Drive Primary Registers

 

 

 

1F8 - 1FF

Unused

 

 

 

 

200

- 21F

Unused

 

 

 

 

220

- 22F

ESS Audio Registers (1st Possible) (Default)

 

 

 

 

230

- 23F

ESS Audio Registers (2nd Possible)

 

 

 

 

240

- 24F

ESS Audio Registers (3rd Possible)

 

 

 

 

250

- 25F

ESS Audio Registers (4th Possible)

 

 

 

 

260

- 277

Unused

 

 

 

 

278

- 27A

LPT2 and High Speed Parallel Port Registers

 

 

 

27B - 27F

LPT2 High Speed Printer Port Registers

 

 

 

 

280

- 2F7

Unused

 

 

 

2F8 - 2FF

Serial Control Register COM2

 

 

 

 

300

- 36F

Unused

 

 

 

 

370

- 371

Reserved

 

 

 

 

372

 

Diskette Digital Output Register

 

 

 

 

373

 

Unused

 

 

 

 

374

 

Reserved

 

 

 

 

375

 

Diskette Main Status/Data Registers

 

 

 

 

376

 

Reserved

 

 

 

 

377

 

Diskette Input/Control Registers

 

 

 

 

378

- 37A

LPT1 and High Speed Parallel Port Registers

 

 

 

37B - 37F

Unused

 

 

 

 

380

- 387

Unused

 

 

 

 

388

- 38B

ESS FM Synthesizer

 

 

 

38C - 3AF

Unused

 

 

 

3B0 - 3BB

Cirrus Logic Video Controller

 

 

 

3BC - 3BE

LPT3 and High Speed Parallel Port Registers

 

 

 

 

3BF

 

LPT1 High Speed Parallel Port Registers

 

 

 

3C0 - 3CD

Cirrus Logic Video Controller

 

 

 

3D0 - 3DF

Cirrus Logic Video Controller

 

 

 

3F0 - 3F7

Diskette Drive Controller Primary Registers

 

 

 

3F8 - 3FF

COM1 Serial Controller Registers

 

 

 

 

400

- 4CF

Unused

 

 

 

 

480

- 48F

Extended DMS Registers

 

 

 

4D0 - CF6

Unused

 

 

 

 

CF7

 

Configuration/NVM Data Register

 

 

 

CF8 - CFB

PCI Configuration Index Register

 

 

 

CFC - CFF

PCI Configuration Index Register

 

 

 

D00 - FFF

Unused

 

 

 

 

Specifications 6-21

Page 177
Image 177
Compaq 4120 Hard Drive Secondary Registers, 1EF Unused 1F0 1F7 Hard Drive Primary Registers 1F8 1FF, 21F Unused, Reserved

4130T, 4200, 4115, 4150, 4131T specifications

The Compaq 4160T Slimline, along with its variants – 4125D, 4150, 4120T, and 4150T – represents a series of personal computers that were engineered during the early 1990s. These systems were particularly popular for their compact design and efficient performance, catering to both individual users and businesses seeking reliable computing solutions.

The Compaq 4160T Slimline was designed with portability in mind. It featured a slim form factor that allowed it to fit easily into limited spaces, making it an ideal choice for environments where desk space was at a premium. One of the standout characteristics of the 4160T was its lightweight design, which aided in ease of transport.

The 4125D variant was notable for its robust performance capabilities. It utilized an Intel 486 processor, which provided enhanced processing power for multitasking and running memory-intensive applications. The system came equipped with an array of RAM options and upgradable storage, making it adaptable to various user needs.

The Compaq 4150 and 4150T models built upon the strong foundation of their predecessors, offering improved specifications. These models supported a greater range of peripheral devices, including external drives, printers, and modems, thanks to their extensive connectivity options. The 4150T further featured advanced graphics capabilities, making it suitable for light gaming and multimedia tasks.

The 4120T targeted users who prioritized a balance between performance and cost. With its value-driven design, this model provided essential computing features and was often utilized in educational settings and small offices. Its reliability and ease of use made it a favored choice for individuals who required straightforward functionality.

All models in this series showcased Compaq's commitment to innovation, featuring technologies such as integrated memory management and support for DOS-based applications. Additionally, the systems were equipped with customizable options, allowing users to choose specific configurations that best suited their unique requirements.

In summary, the Compaq 4160T Slimline and its counterparts presented a solution that combined compact design with practical performance. Their legacy continues to remind us of the evolution of personal computing and the foundational role that systems like these played in the development of modern PCs. These models represented a bridge between earlier computing technology and the more sophisticated devices that followed, paving the way for advancements in the industry.