Nic Upgrading/Changing; Figure 5-16. Remote Systema - Compaq Deskpro Workstation AP230 Technical Reference Manual

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.
Network
Cable
System or
Backplane
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.
Hood Sensor
Not connected on Configurable Minitower models.
Figure 5-17. RSA Logic, Block Diagram
NIC Card in PCI Slot
System or Backplane Board
BIOS Fail
47B34x
OS Fail
I/O Cntlr.
NC
Intrusion
Fan
NC
Fan Alert
NC
Thermal
Fan Therm.
ASIC
PCI
Bus
Third Edition - April 2001
Technical Reference Guide
AOL/SOS Cable
Optional NIC Card
AOL/SOS
Header
SOS
1
7
PCI
Connector
PCI
Bus
Compaq Deskpro Personal Computers
AOL/SOS
Header P12
5-37