Appendix D Compaq/Intel Network Interface Controller Adapters
D.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 (see figure below). Each adapter can operate in half- or
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BIOS
ROM
PCI Bus
PCI Connector
3.3 VDC
Intel
825xx
Ethernet Controller (see table below)
TX/RX
PHY
Conn.
Speed
TX/RX
Link/
Activity
Controller Type | Featured on |
82559 | Intel PRO/100+ Management Adapter |
82550 | Intel PRO/100 S Management Adapter |
Figure D-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 compliant
♦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.
Changed - April 2003
