Compaq 850 manual Vdc, WOL Bios, Tx/Rx Phy, Controller Type Featured on

Appendix I Compaq/Intel Network Interface Controller Adapters

I.2 FUNCTIONAL DESCRIPTION

The Intel PRO/100+ and the PRO/100 S Management Adapters are based on the Intel 82559 and 82550 Ethernet Controllers (respectively) supported by firmware in flash ROM (Figure I-2). Each adapter can operate in half- or full-duplex modes and provides auto-negotiation of both mode and speed. Half-duplex operation features an Intel-proprietary collision reduction mechanism while full-duplex operation follows the IEEE 802.3x flow control specification. Transmit and receive FIFOs of three kilobytes each reduce the chance of overrun while waiting for bus access. Each card includes an on-board 5/3.3 VDC regulator circuit and WOL connector in support of Wake- On-LAN functionality.

	WOL
Conn.
				5/3.3
1		5 VDC Aux			VDC
2		GND			Reg.
3		WOL
			BIOS

3.3 VDC

RJ-45 Conn.

ROM

32-Bit

PCI

PCI

Connector

Intel 825xx

Ethernet Controller (see table below)

TX/RX

PHY

TX/RX

Speed

Link/

Activity

Controller Type	Featured on
82559	Intel PRO/100+ Management Adapter
82550	Intel PRO/100 S Management Adapter

Figure I-2.Intel PRP/100+ Management Adapter, Block diagram

Key features of these adapters include:

♦3-KB transmit and 3-KB receive FIFOs

♦PCI ver. 2.2 compliant (PME- support)

♦Dual-mode support with auto-switching between 10BASE-T and 100BASE-TX

♦Both APM and ACPI power management support

♦D0-D3 power state wake event support

♦Boot ROM with PXE and RPL support

The 82559 and 82550 controllers feature high and low priority queues and provides priority-packet processing for networks that support that feature. The controller’s micro-machine processes transmit and receive frames independently and concurrently. Receive runt (undersized) frames are not passed on as faulty data but discarded by the controller, which also directly handles such errors as collision detection or data under-run. An EEPROM is used to store identification, configuration, and connection parameters.

The 82550 controller provides all the functionality of the 82559 plus IP security (IPSEC) support through a hardware accelerator engine.

I-2Compaq Personal Computers

Original - December 2000