Networking Silicon — GD82559ER

7.1.10PCI Subsystem Vendor ID and Subsystem ID Registers

The Subsystem Vendor ID field identifies the vendor of an 82559ER-based solution. The Subsystem Vendor ID values are based upon the vendor’s PCI Vendor ID and is controlled by the PCI Special Interest Group (SIG).

The Subsystem ID field identifies the 82559ER-based specific solution implemented by the vendor indicated in the Subsystem Vendor ID field.

The 82559ER provides support for configurable Subsystem Vendor ID and Subsystem ID fields. After hardware reset is de-asserted, the 82559ER automatically reads addresses Ah through Ch of the EEPROM. The first of these 16-bit values is used for controlling various 82559ER functions. The second is the Subsystem ID value, and the third is the Subsystem Vendor ID value. Again, the default values for the Subsystem ID and Subsystem Vendor ID are 0h and 0H, respectively.

The 82559ER checks bit numbers 15, 14, and 13 in the EEPROM, word Ah and functions according to Table 7 below.

Table 7. 82559ER ID Fields Programming

Bits 15, 14

Bit 13

Device ID

Vendor ID

Revision ID

Subsystem ID

Subsystem

Vendor ID

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

11b, 10b,

X

1209H

8086H

09H

0000H

0000H

00b

 

 

 

 

(Default)

(Default)

 

 

 

 

 

 

 

 

 

 

 

 

01b

0b

1209H

8086H

09H

Word BH

Word CH

 

 

 

 

 

 

 

01b

1b

1209H

8086H

Word AH,

Word BH

Word CH

 

 

 

 

bits 10:8

 

 

 

 

 

 

 

 

 

Note: The Revision ID is subject to change according to the silicon stepping.

The above table implies that if the 82559ER detects the presence of an EEPROM (as indicated by a value of 01b in bits 15 and 14), then bit number 13 determines whether the values read from the EEPROM, words Bh and CH, will be loaded into the Subsystem ID (word BH) and Subsystem Vendor ID (word CH) fields. If bits 15 and 14 equal 01b and bit 13 equals 1b, the three least significant bits of the Revision ID field are programmed by bits 8-10 of the first EEPROM word, word AH.

Between the de-assertion of reset and the completion of the automatic EEPROM read, the 82559ER does not respond to any PCI configuration cycles. If the 82559ER happens to be accessed during this time, it will Retry the access. More information on Retry is provided in Section 4.2.1.1.3, “Retry Premature Accesses” on page 17 .

7.1.11Capability Pointer

The Capability Pointer is a hard coded byte register with a value of DCH. It provides an offset within the Configuration Space for the location of the Power Management registers.

7.1.12Interrupt Line Register

The Interrupt Line register identifies which system interrupt request line on the interrupt contoller the device’s PCI interrupt request pin (as defined in the Interrupt Pin register) is routed to.

Datasheet

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Intel GD82559ER manual PCI Subsystem Vendor ID and Subsystem ID Registers, Capability Pointer, Interrupt Line Register

GD82559ER specifications

The Intel GD82559ER is a highly regarded network interface controller (NIC) designed for use in various computing environments, primarily for stable connectivity in both desktop and server applications. Released as part of the 82559 family of Ethernet controllers, the GD82559ER features advanced technologies that enhance performance, reliability, and manageability.

One of the standout features of the 82559ER is its ability to support both 10/100 Mbps Ethernet. This dual capability allows the controller to operate in a wide range of network settings, making it adaptable to legacy systems while also providing support for modern Ethernet standards. This versatility is crucial for organizations looking to maintain operational effectiveness without the need for immediate upgrades to their existing infrastructure.

The GD82559ER employs a PCI interface, which allows it to connect with various devices and motherboards easily, making it a go-to choice for manufacturers aiming for integration in their systems. It also includes features like Auto-Negotiation, enabling the NIC to automatically detect and select the appropriate speed and duplex mode for optimal performance. This capability is essential in dynamic networking environments, where devices from various generations coexist.

Power management is another critical aspect of the GD82559ER. The controller supports advanced power-saving features like PCI Power Management, reducing energy consumption during low-usage periods. This not only contributes to lower operational costs but also aligns with modern eco-friendly initiatives in technology.

Additionally, the GD82559ER comes equipped with advanced diagnostics and monitoring capabilities. This enhances the network's manageability by allowing administrators to track performance metrics and diagnose issues effectively. Through its onboard diagnostics, the controller aids in ensuring a stable network connection, allowing for timely interventions when issues arise.

The controller is also designed with a robust architecture that supports various operating systems, facilitating a broad implementation across different platforms. As a result, the GD82559ER has become a reliable option for system builders and enterprises focused on building dependable networking solutions.

Overall, the Intel GD82559ER is a versatile, high-performance network interface controller that continues to serve as a foundational component for computer systems that require efficient, reliable networking capabilities. Its combination of technologies and features makes it a popular choice in diverse computing environments.