APPENDIX

Appendix

A. I/O Port Address Map

Each peripheral device in the system is assigned a set of I/O port addresses which also becomes the identity of the device. The following table lists the I/O port addresses used.

Address

000h - 01Fh

020h - 03Fh

040h - 05Fh

060h - 06Fh

070h - 07Fh

080h - 09Fh

0A0h - 0BFh

0C0h - 0DFh

0F0h

0F1h

1F0h - 1F7h

278h - 27Fh

2F8h - 2FFh

2B0h - 2DFh

378h - 3FFh

360h - 36Fh

3B0h - 3BFh

3C0h - 3CFh

3D0h - 3DFh

3F0h - 3F7h

3F8h - 3FFh

Device Description

DMA Controller #1

Interrupt Controller #1

Timer

Keyboard Controller

Real Time Clock, NMI

DMA Page Register

Interrupt Controller #2

DMA Controller #2

Clear Math Coprocessor Busy Signal

Reset Math Coprocessor

IDE Interface

Parallel Port #2(LPT2)

Serial Port #2(COM2)

Graphics adapter Controller

Parallel Port #1(LPT1)

Network Ports

Monochrome & Printer adapter

EGA adapter

CGA adapter

Floppy Disk Controller

Serial Port #1(COM1)

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Intel LGA775 user manual Appendix, O Port Address Map

LGA775 specifications

The Intel LGA775, also known as Socket T, was a significant advancement in CPU socket design when it was introduced in 2004, primarily tailored for Intel's Pentium 4, Pentium D, Core 2 Duo, and Xeon processors. This socket provided a robust platform for users seeking performance improvements over previous socket designs, specifically the LGA 478.

One of the standout features of LGA775 is its physical layout. The socket utilizes a Land Grid Array configuration, comprising 775 pins on the motherboard that create an electrical connection with the chip. This design enhances the physical stability of the connection, reducing the likelihood of damage during component installation.

LGA775 supports a range of Intel technologies such as Dual-Core processing, which significantly improved multitasking and performance in demanding applications by integrating two cores within a single processor. This advancement laid the groundwork for more efficient computing, catering to both casual and professional users alike.

Another key technology associated with the LGA775 platform is the Enhanced Speedstep Technology (EIST), which allowed processors to adjust their voltage and frequency dynamically. This not only optimized performance but also contributed to energy efficiency, making it a more environmentally friendly choice for users.

The socket supports various front-side bus (FSB) speeds, ranging from 800 MHz to 1600 MHz, enabling higher data transfer rates between the CPU and RAM. This performance characteristic is critical for applications that require substantial memory throughput, such as video editing and gaming.

Moreover, LGA775 was compatible with a variety of chipsets that enhanced its capabilities, such as those featuring Intel's own Express Chipsets. These chipsets included integrated graphics, USB 2.0 support, and improved storage interfaces like SATA, which streamlined data management and boosted overall system performance.

Over the years, LGA775 has become a popular choice for budget and mid-range desktops, particularly because of its versatility and broad compatibility with different processor generations. Even with the advent of newer sockets, LGA775 remains a memorable part of Intel's legacy, representing a crucial stepping stone towards modern multi-core architectures.

In summary, Intel's LGA775 socket brought about comprehensive advancements in design, performance, and power management, making it a noteworthy component in the history of computing. Its influence continues to be felt, as it set the standards for subsequent socket designs that prioritize efficiency and performance.