Compaq Evo D500 - Nic Upgrading;Changing

Technical Reference Guide
5.9.7 NIC UPGRADING/CHANGING
The integrated NIC may be used in conjunction with another NIC card in a PCI slot. These
systems provide AOL support for NIC cards that are AOL-compliant to the extent described
previously in section 5.9.2. These systems also provide Remote System Alert (RSA) support for
such NIC cards as the 3Com 3C905C-TX NIC card. The RSA function is similar to AOL in that
the unit provides, even while powered off, system status alert messages to a network console.
Note that NIC cards implementing the RSA method do not use the PCI/SMBus for receiving alert
information and therefore require, in addition to the PCI connection, an auxiliary cable connection
with the system as shown in Figure 5-16.
AOL/SOS
Header P12
Network
Cable
AOL/SOS Cable
System o
r
Backplane
board
NIC Card in PCI Slot
Figure 5-16. Remote System Alert Implementation (Generic Representation)
In the Remote System Alert implementation, the NIC card receives event notification directly
from the system’s thermal and hood sensors and the LPC47B357 I/O controller over an AOL/SOS
cable connection (Figure 5-17). During system-off conditions the NIC card receives auxiliary
power from the 3.3 VDC auxiliary power rail on the PCI bus.
AOL/SOS
Header
1
7
PCI
Bus
PCI
Bus
PCI
Connector
Optional NIC Card
SOS
System or Backplane Board
NC
NC
47B34x
I/O Cntlr.
Fan Therm.
Fan Alert
O
NC
Intrusion
Fan
S Fail
BIOS Fail
Thermal
ASIC
Hood Sensor
Not connected on Configurable Minitower models.
Figure 5-17. RSA Logic, Block Diagram
Compaq Deskpro and Evo Personal Computers
Featuring Intel Celeron and Pentium III Processors
Fifth Edition - March 2002
5-37