Intel Desktop Board D925XCV/D925XBC Technical Product Specification

2.4 Fixed I/O Map

Table 13. I/O Map

Address (hex)

Size

Description

 

 

 

 

0000

- 00FF

256 bytes

Used by the Desktop Board D925XCV/D925XBC. Refer to

 

 

 

the ICH6-R data sheet for dynamic addressing information.

 

 

 

 

0170

- 0177

8 bytes

Secondary Parallel ATA IDE channel command block

 

 

 

01F0 - 01F7

8 bytes

Primary Parallel ATA IDE channel command block

 

 

 

0228 - 022F (Note 1)

8 bytes

LPT3

0278

- 027F (Note 1)

8 bytes

LPT2

02E8 - 02EF (Note 1)

8 bytes

COM4

02F8 - 02FF (Note 1)

8 bytes

COM2

0374

- 0377

4 bytes

Secondary Parallel ATA IDE channel control block

 

 

 

0377, bits 6:0

7 bits

Secondary IDE channel status port

 

 

 

 

0378

- 037F

8 bytes

LPT1

03E8 - 03EF

8 bytes

COM3

03F0 - 03F5

6 bytes

Diskette channel

03F4 – 03F7

1 byte

Primary Parallel ATA IDE channel control block

03F8 - 03FF

8 bytes

COM1

 

 

 

04D0 - 04D1

2 bytes

Edge/level triggered PIC

 

 

 

LPTn + 400

8 bytes

ECP port, LPTn base address + 400h

 

 

 

0CF8 - 0CFB (Note 2)

4 bytes

PCI Conventional bus configuration address register

0CF9 (Note 3)

1 byte

Reset control register

0CFC - 0CFF

4 bytes

PCI Conventional bus configuration data register

FFA0 - FFA7

8 bytes

Primary Parallel ATA IDE bus master registers

FFA8 - FFAF

8 bytes

Secondary Parallel ATA IDE bus master registers

Notes:

1.Default, but can be changed to another address range.

2.Dword access only.

3.Byte access only.

NOTE

Some additional I/O addresses are not available due to ICH6-R address aliasing. The ICH6-R data sheet provides more information on address aliasing.

For information about

Refer to

Obtaining the ICH6-R data sheet

Section 1.4 on page 19

 

 

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Intel D925XCV, D925XBC specifications Fixed I/O Map, Address hex Size Description

D925XBC, D925XCV specifications

The Intel D925XBC and D925XCV are motherboards designed for Intel's LGA 775 socket, targeted primarily at the desktop market during the mid-2000s. These motherboards support Intel's innovative 800 MHz Front Side Bus and provide a robust platform for various computing applications, including gaming and multitasking.

One of the standout features of the D925XBC and D925XCV is their compatibility with Intel's Pentium 4 and Pentium D dual-core processors. These processors deliver impressive performance, especially for users engaging in demanding tasks such as video editing and 3D rendering. The support for dual-channel DDR2 memory allows for increased bandwidth and improved overall system performance, accommodating up to 8 GB of memory in total.

The motherboards are equipped with the Intel 925X chipset, which integrates advanced technologies. This chipset supports Intel's Enhanced Memory 64 Technology (EM64T), allowing for more efficient processing power and better resource management. The presence of the I/O Controller Hub (ICH6) also enhances connectivity options, including SATA 3.0 Gbps interfaces for faster data transfer rates and improved storage capabilities.

Regarding expansion and connectivity, both motherboards feature multiple PCI Express slots along with PCI slots, allowing users to customize their systems according to their needs. This expandability is essential for gamers and professionals looking to add advanced graphics cards and other peripherals. Additionally, these boards come with integrated audio, ensuring satisfactory sound quality without the need for additional sound cards.

The D925XBC and D925XCV motherboards also include integrated Ethernet controllers, supporting fast network connectivity essential for gaming and high-speed internet access. With multiple USB ports available, users can connect a wide variety of devices easily, enhancing the flexibility of their setups.

In terms of form factor, both boards follow the ATX layout, providing compatibility with a broad range of computer cases. This ensures ease of installation and upgrades while promoting good airflow and optimal thermal management for the components installed.

Overall, the Intel D925XBC and D925XCV motherboards integrate essential features and technologies that provide a solid foundation for desktop computing during their time. With strong processing capabilities, expandability, and good connectivity options, these boards were well-received by users looking for reliable performance and versatility in their systems.