Compaq W4000 manual Power Management Support, APM Environment, Acpi Environment

Chapter 5 Input/Output Interfaces

5.9.3 POWER MANAGEMENT SUPPORT

The NIC features Wired-for-Management (WfM) support providing system wake up from network events (WOL) as well as generating system status messages (AOL) and supports both APM and ACPI power management environments. The controller receives 3.3 VDC (auxiliary) power as long as the system is plugged into a live AC receptacle, allowing support of wake-up events occuring over a network while the system is powered down or in a low-power state.

5.9.3.1 APM Environment

The Advanced Power Management (APM) functionality of system wake up is implemented through the system’s APM-compliant BIOS and the controller’s Magic Packet-compliant hardware. This environment bypasses operating system (OS) intervention allowing a plugged in unit to be turned on remotely over the network (i.e., “remote wake up”). In APM mode the controller will respond upon receiving a Magic Packet, which is a packet where the node’s address is repeated 16 times. Upon Magic packet detection, the controller initiates the boot sequence.

5.9.3.2 ACPI Environment

The Advanced Configuration and Power Interface (ACPI) functionality of system wake up is implemented through an ACPI-compliant OS and is the default power management mode. The following wakeup events may be individually enabled/disabled through the supplied software driver:

♦Magic Packet – Packet with node address repeated 16 times in data portion

NOTE: The following functions are supported in NDIS5 drivers but implemented through remote management software applications (such as LanDesk).

♦Individual address match – Packet with matching user-defined byte mask

♦Multicast address match – Packet with matching user-defined sample frame

♦ARP (address resolution protocol) packet

♦Flexible packet filtering – Packets that match defined CRC signature

The PROSet Application software (pre-installed and accessed through the System Tray or Windows Control Panel) allows configuration of operational parameters such as WOL and duplex mode.

5-34Compaq Evo and Workstation Personal Computers

Featuring the Intel Pentium 4 Processor

Second Edition – January 2003