PCI Registers, Configuration Registers, Bit Name

List of Registers

Table 55. Lookup Table Data Register

Table 54 and Table 55 are registers that provide a method for the lookup table to be accessed using I/O transactions, although memory transactions can use either this mechanism or direct access of the lookup table.

The lookup table is not byte-writable; byte enables are ignored.

•Byte Offset: 02F:02Ch

Bit

Name

R/W

Description

This register contains the data written to or read from the Lookup Table at the offset given in the Lookup Table Offset register. When this register is written, the value written is written to the specified Lookup Table entry. When this register is read, the value returned reflects the data read from the specified Lookup Table entry. The following fields are defined:

•bit 0: valid bit

31:0

LUT_DATA

R/W

• bits 2:1: reserved (read only as 0)

•bit 3: prefetchable

•bits 7:4: reserved (read only as 0)

•bits 17:8: translated base or reserved (based on page size)

•bits 31:18: translated base

The lookup table is not reset and therefore powers up to an indeterminate value.

Table 56. Upstream Memory 2 Lookup Table

The lookup table is not byte-writable; byte enables are ignored.

•Byte Offsets: 1FF:100h

Bit	Name	R/W	Description

			Contains the lookup table for the Upstream Memory 2 Base Address range.
			Each entry in the lookup table is 4 bytes wide. The top 16 to 24 bits, depending
	M2LUT	R/W	on the page size, of each entry are used to replace the page address of
			upstream memory transactions falling inside the Upstream Memory 2 BAR. The
			bottom four bits are control bits as described in Section 4.3.3.

16.5PCI Registers

This section covers pages 16-147through 16-165and Table 57 through Table 80. See Chapter 3 or Chapter 5 for theory of operation information.

16.5.1Configuration Registers

The registers described in this section are shared between the primary and secondary interfaces.

21555 Non-Transparent PCI-to-PCI Bridge User Manual

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21555 specifications

The Intel 21555 is a prominent microprocessor developed by Intel, designed to cater to a variety of computing needs. This processor marks a significant step forward in Intel's lineup and underscores the company's commitment to advancing technology in personal computing, enterprise solutions, and beyond.

One of the standout features of the Intel 21555 is its advanced architecture. It utilizes a multi-core design, enabling improved performance through parallel processing. This architecture allows multiple applications to run seamlessly without a decline in speed. The cores are built on a cutting-edge manufacturing process that enhances energy efficiency while maintaining high clock speeds.

The Intel 21555 supports a wide range of technologies, including Intel Turbo Boost, which enables dynamic adjustments to the processor’s performance based on workload demands. This feature allows the processor to accelerate its speed during intensive tasks, providing users with a responsive experience when it matters the most.

Another key characteristic of the Intel 21555 is its support for integrated graphics. With Intel UHD Graphics technology, users can enjoy enhanced visuals for everyday tasks such as video playback, web browsing, and light gaming. This eliminates the need for a separate graphics card for many users, particularly in home office or light gaming scenarios.

Security is a significant focus in the design of the Intel 21555. It includes built-in hardware-based security features like Intel Trusted Execution Technology and Secure Boot. These features help protect against various types of threats, ensuring that user data remains secure from malicious attacks.

The Intel 21555 is also optimized for use with Intel's platform technologies, including Intel Optane memory and Intel Rapid Storage Technology. These technologies work together to deliver faster boot times and improved system responsiveness, making computing more efficient for users.

Furthermore, the Intel 21555 is designed to support virtualization technologies, allowing multiple operating systems to run concurrently without compromising performance. This is particularly useful for developers and businesses that rely on virtualization for testing and development environments.

In summary, the Intel 21555 is a powerful and versatile processor that reflects Intel's ongoing innovation in the computing space. With its multi-core architecture, enhanced graphics capabilities, strong security features, and advanced technologies, it stands out as an excellent choice for a wide range of applications, serving both casual users and professionals alike.

Intel 21555 PCI Registers, Configuration Registers, Lookup Table Data Register, Bit Name

Models: 21555