System Control Block Command Word, Port

Networking Silicon — GD82559ER

8.1.2System Control Block Command Word

Commands for the 82559ER’s Command and Receive units are placed in this register by the CPU.

Bits	Name	Description


31:26	Specific	Specific Interrupt Mask. Setting this bit to 1b causes the 82559ER to stop
	Specific	generating an interrupt (in other words, de-assert the INTA# signal) on the
	Interrupt Mask
	Interrupt Mask	corresponding event.
		corresponding event.

25	SI	Software Generated Interrupt. Setting this bit to 1b causes the 82559ER
25	SI	to generate an interrupt. Writing a 0b to this bit has no effect.


		Interrupt Mask. If the Interrupt Mask bit is set to 1b, the 82559ER will not
24	M	assert its INTA# pin. The M bit has higher precedence that the Specific
		Interrupt Mask bits and the SI bit.

23:20	CUC	Command Unit Command. This field contains the CU command.

19	Reserved	This bit is reserved and should be set to 0b.

18:16	RUC	Receive Unit Command. This field contains the RU command.

8.1.3System Control Block General Pointer

The System Control Block (SCB) General Pointer is a 32-bit field that points to various data structures depending on the command in the CU Command or RU Command field.

8.1.4PORT

The PORT interface allows software to perform certain control functions on the 82559ER. This field is 32 bits wide:

•Address and Data (bits 32:4)

•PORT Function Selection (bits 3:0)

The 82559ER supports four PORT commands: Software Reset, Self-test, Selective Reset, and Dump.

8.1.5Flash Control Register

The Flash Control Register is a 32-bit field that allows access to an external Flash device.

8.1.6EEPROM Control Register

The EEPROM Control Register is a 32-bit field that enables a read from and a write to the external

EEPROM.

8.1.7Management Data Interface Control Register

The Management Data Interface (MDI) Control register is a 32-bit field and is used to read and write bits from the MDI.

Bits	Description


31:30	These bits are reserved and should be set to 00b.

Datasheet

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.

Intel GD82559ER System Control Block Command Word, System Control Block General Pointer, Port

Models: GD82559ER