Intel N440BX User manual

N440BX Server Board
Product Guide
Order Number: 695449-001

Disclaimer
Intel Corporation (Intel) makes no warranty of any kind with regard to this material, including, but not limited
to, the implied warranties of merchantability and fitness for a particular purpose. Intel assumes no
responsibility for any errors that may appear in this document. Intel makes no commitment to update nor to
keep current the information contained in this document. No part of this document may be copied or
reproduced in any form or by any means without prior written consent of Intel.
An Intel product, when used in accordance with its associated documentation, is "Year 2000 Capable" when,
upon installation, it accurately stores, displays, processes, provides, and/or receives date data from, into, and
between the twentieth and twenty-first centuries, including leap year calculations, provided that all other
technology used in combination with said product properly exchanges date data with it.
†Third-party brands and trademarks are the property of their respective owners.
Copyright ¤ 1998, Intel Corporation.

iii
Contents
1 Description
Server Board Features......................................................................................................... 9
Back Panel Connectors..............................................................................................10
Server Board Connector and Component Locations...................................................11
Processor...................................................................................................................12
Memory .....................................................................................................................12
Peripherals..........................................................................................................................14
Super I/O Chip............................................................................................................14
Add-in Board Slots ..............................................................................................................14
Video...................................................................................................................................15
SCSI Controller ...................................................................................................................15
IDE Controller......................................................................................................................16
Network Controller...............................................................................................................16
Keyboard and Mouse..........................................................................................................17
Server Management............................................................................................................17
Server Board Management Controller (BMC).............................................................17
Security...............................................................................................................................18
Security with Mechanical Locks and Monitoring..........................................................18
Software Locks...........................................................................................................18
2 Upgrading
Tools and Supplies Needed ................................................................................................21
Warnings and Cautions.......................................................................................................21
Server Board.......................................................................................................................22
Removing the Server Board........................................................................................22
Installing the Server Board .........................................................................................23
Memory...............................................................................................................................24
Installing DIMMs.........................................................................................................24
Removing DIMMs.......................................................................................................25
Processors..........................................................................................................................25
Removing a Processor ...............................................................................................26
Installing a Processor .................................................................................................27
Replacing the Back-up Battery............................................................................................29
3 Configuration Software and Utilities
Hot Keys .............................................................................................................................33
Power-on Self Test (POST).................................................................................................34
Using BIOS Setup...............................................................................................................35
Record Your Setup Settings .......................................................................................35
If You Cannot Access Setup.......................................................................................35
Starting Setup.............................................................................................................36
Setup Menus ..............................................................................................................36
Main Menu..................................................................................................................38
Advanced Menu..........................................................................................................40

iv
Security Menu.............................................................................................................43
Server Menu...............................................................................................................44
Boot Menu..................................................................................................................46
Exit Menu ...................................................................................................................47
Using the System Setup Utility............................................................................................48
When to Run the System Setup Utility........................................................................48
What You Need to Do.................................................................................................49
Running the SSU........................................................................................................49
Customizing the SSU..................................................................................................51
Launching a Task .......................................................................................................51
Resource Configuration Add-in (RCA) Window...........................................................52
Multiboot Options Add-in ............................................................................................54
Security Add-in...........................................................................................................54
SEL Viewer Add-in......................................................................................................55
Exiting the SSU ..........................................................................................................55
Emergency Management Port Console...............................................................................56
How the EMP Console Works.....................................................................................57
Requirements.............................................................................................................59
Setting Up the Server for the EMP..............................................................................59
Main EMP Console Window .......................................................................................60
Server Control Operations..........................................................................................62
Phonebook .................................................................................................................65
Management Plug-ins.................................................................................................66
FRUSDR Load Utility...........................................................................................................69
When to Run the FRUSDR Load Utility ......................................................................69
What You Need to Do.................................................................................................69
How You Use the FRUSDR Load Utility......................................................................69
Upgrading the BIOS............................................................................................................75
Preparing for the Upgrade..........................................................................................75
Upgrading the BIOS....................................................................................................76
Recovering the BIOS..................................................................................................77
Changing the BIOS Language....................................................................................77
Using the Firmware Update Utility.......................................................................................78
Running the Firmware Update Utility ..........................................................................78
Installing Video Drivers........................................................................................................78
Using the Symbios SCSI Utility............................................................................................78
Running the SCSI Utility .............................................................................................78
4 Solving Problems
Resetting the System..........................................................................................................79
Fault Resilient Booting.........................................................................................................79
Initial System Startup ..........................................................................................................79
Checklist.....................................................................................................................80
Running New Application Software .....................................................................................80
Checklist.....................................................................................................................80
After the System Has Been Running Correctly....................................................................81
Checklist.....................................................................................................................81

v
More Problem-solving Procedures ......................................................................................81
Preparing the System for Diagnostic Testing..............................................................81
Using PCDiagnostics..................................................................................................82
Monitoring POST........................................................................................................82
Verifying Proper Operation of Key System Lights.......................................................82
Confirming Loading of the Operating System .............................................................83
Specific Problems and Corrective Actions...........................................................................83
Power Light Does Not Light........................................................................................83
No Characters Appear on Screen...............................................................................83
Characters Are Distorted or Incorrect.........................................................................84
System Cooling Fans Do Not Rotate Properly............................................................84
Diskette Drive Activity Light Does Not Light................................................................85
Hard Disk Drive Activity Light Does Not Light.............................................................85
CD-ROM Drive Activity Light Does Not Light..............................................................85
Cannot Connect to a Server .......................................................................................86
Problems with Network...............................................................................................86
PCI Installation Tips....................................................................................................87
Problems with Application Software ....................................................................................87
Bootable CD-ROM Is Not Detected.....................................................................................88
Error and Informational Messages ......................................................................................88
POST Codes and Countdown Codes .........................................................................88
POST Error Codes and Messages......................................................................................92
5 Technical Reference
Connectors..........................................................................................................................95
ATX Power Connector................................................................................................96
Main Power Connector...............................................................................................96
Auxiliary Power (non-ATX Connector)........................................................................97
Diskette Drive.............................................................................................................97
Front Panel Connector................................................................................................98
AT-Style Front Panel Connector.................................................................................98
Fan Interface ..............................................................................................................98
Server Management...................................................................................................99
IMB ...................................................................................................................100
VGA Video Port........................................................................................................100
Keyboard and Mouse................................................................................................100
Parallel Port..............................................................................................................101
Serial Ports A and B .................................................................................................101
RJ-45 Network..........................................................................................................102
Narrow SCSI.............................................................................................................103
Wide SCSI................................................................................................................104
IDE ...................................................................................................................105
ISA ...................................................................................................................106
PCI ...................................................................................................................107
Server Board Jumpers ......................................................................................................108
General Procedure to Change Jumper Setting.........................................................109
CMOS Jumper..........................................................................................................110
Password Jumper.....................................................................................................110

vi
Recovery Boot Jumper.............................................................................................110
Boot Block Write Protect Jumper..............................................................................111
FRB Timer Enable Jumper .......................................................................................112
Chassis Intrusion Detection Jumper .........................................................................112
Interrupts...........................................................................................................................113
Video Modes.....................................................................................................................114
6 Information for Computer Integrators
Regulatory Requirements..................................................................................................119
Safety Standards......................................................................................................119
EMC Regulations......................................................................................................119
Product Certification Markings..................................................................................120
Installation Instructions......................................................................................................121
Ensure EMC.............................................................................................................121
Ensure Host Computer and Accessory Module Certifications...................................122
Prevent Power Supply Overload...............................................................................122
Place Battery Marking on Computer.........................................................................123
Use Only for Intended Applications...........................................................................123
Installation Precautions .....................................................................................................123
7 Equipment Log and Power Consumption Worksheets
Equipment Log..................................................................................................................125
Current Usage..........................................................................................................127
Calculating Power Consumption...............................................................................127
Index.....................................................................................................................................131

vii
Figures
1. Back Panel Connectors..............................................................................................10
2. Server Board Connector and Component Locations...................................................11
3. Server Board Screw Hole Locations...........................................................................23
4. Installing DIMMs.........................................................................................................24
5. Removing a Processor ...............................................................................................26
6. Installing a Second Processor ....................................................................................27
7. Removing a Termination Board..................................................................................28
8. Locking in the Processor ............................................................................................29
9. Replacing the Lithium Battery.....................................................................................31
10. System Setup Utility Main Window.............................................................................50
11. EMP Console in Command State...............................................................................57
12. EMP Console in Redirect State ..................................................................................58
13. Connect Dialog...........................................................................................................62
14. Power On/Off Dialog...................................................................................................63
15. Reset Dialog...............................................................................................................64
16. Phonebook Dialog......................................................................................................65
17. Connector Locations...................................................................................................95
18. Jumper Locations.....................................................................................................108
Tables
1. Server Board Features................................................................................................ 9
2. NIC LEDs ...................................................................................................................10
3. Sample DIMM Component Combinations...................................................................13
4. Software Security Features ........................................................................................19
5. Configuration Utilities..................................................................................................33
6. Hot Keys.....................................................................................................................33
7. EMP Console Access Modes (Server Configured for Console Redirect)....................58
8. EMP Console Access Modes (Server not Configured for Console Redirect)..............59
9. Port-80 Codes............................................................................................................88
10. POST Error Codes and Messages .............................................................................92
11. ATX Power Connector Pinout.....................................................................................96
12. Main Power Connector Pinout....................................................................................96
13. Auxiliary Power Connector Pinout ..............................................................................97
14. Diskette Drive Connector Pinout.................................................................................97
15. Front Panel Connector Pinout ....................................................................................98
16. AT Style Front Panel Connector Pinout......................................................................98
17. Heatsink Fan Connector Pinout..................................................................................98
18. Chassis Fan Connector Pinout...................................................................................99
19. Server Management Module Connector Pinout..........................................................99
20. IMB Connector Pinout ..............................................................................................100
21. Video Port Connector Pinout....................................................................................100
22. Keyboard and Mouse Connector Pinouts .................................................................100
23. Parallel Port Connector Pinout..................................................................................101
24. Serial Port A (External) Connector Pinout.................................................................101
25. Serial Port B (Internal) Header Pinout ......................................................................101

viii
26. RJ-45 Network Connector Pinout .............................................................................102
27. Narrow SCSI Connector Pinout................................................................................103
28. Wide SCSI Connector Pinout ...................................................................................104
29. IDE Connector Pinout...............................................................................................105
30. ISA Connector Pinout...............................................................................................106
31. PCI Connector Pinout...............................................................................................107
32. Server Board Jumper Summary...............................................................................108
33. Interrupts..................................................................................................................113
34. Standard VGA Modes...............................................................................................114
35. Extended VGA Modes..............................................................................................115
36. Power Usage Worksheet 1.......................................................................................128
37. Power Usage Worksheet 2.......................................................................................129

9
1 Description
Server Board Features
Table 1. Server Board Features
Feature Description
Processor Installed: Up to two Pentium®II processors, packaged in single edge contact
(S.E.C.) cartridges and installed in 242-pin Slot 1 processor connectors,
operating at 1.8 V to 3.5 V. The system board’s voltage regulator is
automatically programmed by the processor’s VID pins to provide the required
voltage.
Memory, dynamic
random access (DRAM) Four 72-bit sockets for 100 MHz, PC/100 compliant, ECC or non-ECC, registered or unbuffered, SDRAM dual inline memory modules (DIMM).
Video memory Installed: 2 MB of video memory.
PCI bus Four PCI expansion slots for add-in boards (one slot shared with an ISA slot).
1x32 bit PCI bus. Embedded devices: video controller, Network Interface
Controller (NIC), and SCSI controller.
ISA bus Two ISA expansion slots for add-in boards (one slot shared with a PCI slot).
Embedded PC-compatible support (serial, parallel, mouse, keyboard, diskette,
and Plug and Play features).
Server Management Thermal/voltage monitoring and error handling.
Real-time clock/calendar (RTC).
Front panel controls and indicators (LEDs).
System Setup Utility (SSU).
Basic Input/Output System (BIOS), Power On Self Test (POST), and Setup
stored in flash memory.
Graphics Integrated onboard Cirrus Logic CL-GD5480 super video graphics array (SVGA)
controller.
SCSI Symbios†SYM53C876 dual function controller providing ultra wide and legacy
narrow SCSI interfaces.
Network Integrated onboard NIC, an Intel 82558 PCI LAN controller for 10 or 100 Mbps
TX Fast Ethernet†networks. RJ-45 Ethernet connector and indicator LEDs at
I/O back panel.
System I/O PS/2†-compatible keyboard and mouse ports, 6-pin DIN.
Advanced parallel port, supporting Enhanced Parallel Port (EPP) level 1.7 and
1.9, ECP, compatible 25-pin.
VGA†video port,15-pin.
Two serial ports, 9-pin (serial port B is connected from the 10 pin header on the
server board to the back panel via a provided ribbon cable).
Network: RJ-45 Ethernet port.
Form Factor Server AT†form-factor, 12 u 13 inches, ATX 2.01 compliant I/O.

10 System Description
Back Panel Connectors
OM07054
BD F
A
E
CGH
Figure 1. Back Panel Connectors
A. Mouse Connector
B. Keyboard Connector
C. Parallel Port Connector
D. Serial Port Connector
E. VGA Connector
F. Network Connector
G. Green NIC LED
H. Orange NIC LED
Table 2. NIC LEDs
NIC
LED Color If it's on If it's blinking If it's off
Orange 100 Mbps network
connection. NA 10 Mbps network connection.
Green Linked to network, no
network traffic. Linked to network, sending or receiving data. Not linked to network.

11
Server Board Connector and Component Locations
Z
F G HA C D EB
I
L
J
NO
P
Q
K
M
X
W UV T S R
Y
DD
BB
CC
AA
Pri.
Sec.
OM06957
EE
FF
Figure 2. Server Board Connector and Component Locations
A. Secondary processor connector Q. System fan connector (fan2)
B. Primary processor connector R. Server monitor module (SMM) connector
C. Processor Heatsink fan connectors S. Narrow SCSI connector
D. Aux power connector T. Wide SCSI connector
E. ATX power connector U. Memory sockets for four DIMM components
F. Diskette drive connector V. PCI slots for add-in boards
G. Main power connector W. ISA slots for add-in boards
H. Hard drive LED connector X. Chassis intrusion connector
I. Front panel connector, 16 pin Y. Wake on LAN†enable jumper
J. Speaker connector Z. USB header
K. AT front panel connector AA. RJ-45 network connector
L. Lithium backup battery BB. Serial port 2 header
M. System fan connector (fan1) CC. VGA monitor port
N. IDE connectors, primary and secondary DD. Parallel port connector
O. External IMB connector EE. Serial port 1 connector
P. Configuration jumper blocks FF. Keyboard and Mouse PS/2 compatible
connectors

12 System Description
Processor
Each Pentium II processor is packaged in a Single Edge Contact (S.E.C.) cartridge. The cartridge
includes the processor core with an integrated 16 KB primary (L1) cache; the secondary (L2)
cache; a thermal plate; and a back cover.
The processor implements the MMX™technology and maintains full backward compatibility with
the 8086, 80286, Intel386™, Intel486™, Pentium, Pentium Pro and Pentium II processors. The
processor’s numeric coprocessor significantly increases the speed of floating-point operations and
complies with ANSI/IEEE standard 754-1985.
Each processor cartridge connects to the system board through a 242-pin edge connector. The
cartridge is secured by a retention module attached to the system board. Depending on
configuration, your system may have one or two processors.
The processor external interface is MP-ready and operates at 100 MHz. The processor contains a
local APIC section for interrupt handling in MP and UP environments.
The second-level cache is located on the substrate of the S.E.C. cartridge. The cache includes
burst pipelined synchronous static RAM (BSRAM). The L2 cache is offered in 512 KB
configurations only, with error correcting code (ECC) that operates at half the core clock rate.
Memory
Only 100 MHz PC/100 ECC SDRAM is supported by the system board. Memory is partitioned as
four banks of SDRAM DIMMs, each providing 72 bits of noninterleaved memory (64-bit main
memory plus ECC):
x Install from 32 MB to 1 GB of memory, using registered DIMMs.
x Install from 32 MB to 512 MB of memory, using unbuffered DIMMs.
Memory should be added in order from slot 1 to slot 4.
✏NOTE
Do not mix registered and unbuffered memory. Non ECC memory maybe
installed but is not recommended. Mixing Non-ECC memory and ECC
memory causes all ECC features to be disabled.
Dual address strobe (RAS) signals are provided for each DIMM. When single-banked DIMMs are
used, one of the RAS lines is connected to both 36-bit “halves” of the DIMM. When double-
banked DIMMs are used (known as Dual RAS), both RAS lines are connected to two 36-bit
“quarters” of the DIMM.

13
System memory begins at address 0 and is continuous (flat addressing) up to the maximum amount
of DRAM installed (exception: system memory is noncontiguous in the ranges defined as memory
holes using configuration registers). The system supports both base (conventional) and extended
memory.
x Base memory is located at addresses 00000h to 9FFFFh (the first 640 KB).
x Extended memory begins at address 0100000h (1 MB) and extends to FFFFFFFFh (4 GB), the
limit of addressable memory. The top of physical memory is a maximum of 1 GB (to
3FFFFFFFh).
Some operating systems and application programs use base memory—for example, MS-DOS†,
OS/2†, and UNIX†. Other operating systems use both conventional and extended memory—for
example, OS/2 and UNIX. MS-DOS does not use extended memory; however, some MS-DOS
utility programs such as RAM disks, disk caches, print spoolers, and windowing environments use
extended memory for better performance.
The controller automatically detects, sizes, and initializes the memory array, depending on the
type, size, and speed of the installed DIMMs, and reports memory size and allocation to the system
via configuration registers.
✏NOTE
DIMM sizes and compatibility: use DIMMs that have been tested for
compatibility with the system board. Contact your sales representative or
dealer for a current list of approved memory modules. The table below lists
some sample size combinations.
Table 3. Sample DIMM Component Combinations
Bank 0 (slot J1) Bank 1 (slot J2) Bank 2 (slot J3) Bank 3 (slot J4) Total memory
32 32 MB
32 32 64 MB
32 32 128 192 MB
32 32 128 128 320 MB
32 128 128 128 416 MB
128 128 128 128 512 MB

14 System Description
Peripherals
Super I/O Chip
The National 87309 device supports two serial ports, one parallel port, diskette drive, PS/2-
compatible keyboard and mouse, and integrated Real Time Clock (RTC). The server board
provides a connector interface for each port.
Serial Ports
Both serial ports are relocatable. By default, port A appears at the onboard DB9 connector and
port B on the 10-pin header. Each serial port can be set to one of four different COMx ports and
can be enabled separately. When enabled, each port can be programmed to generate edge- or
level-sensitive interrupts. When disabled, serial port interrupts are available to add-in boards. In
order to use both ports, you need to connect a ribbon cable from the 10-pin header on the server
board to the I/O panel.
Parallel Port
The 87309 provides one IEEE 1284-compatible 25-pin bidirectional EPP (supporting levels 1.7
and 1.9). BIOS programming of the 87309 registers enable the parallel port and determine the port
address and interrupt. ECP mode is supported with 2 possible DMA channels. When disabled, the
interrupt is available to add-in boards.
Add-in Board Slots
The system board has two full-length ISA bus connectors. One of the connectors shares a chassis
expansion slot with a PCI connector. ISA features:
x Bus speed up to 8.33 MHz
x 16-bit memory addressing
x Type A transfers at 5.33 Mbps
x Type B transfers at 8 Mbps
x 8- or 16-bit data transfers
x Plug and Play ready
The system board has four full-length PCI connectors. One of the connectors shares a chassis
expansion slot with an ISA connector. PCI features:
x Bus speed up to 33 MHz
x 32-bit memory addressing
x 5 V signaling environment
x Burst transfers of up to 133 Mbps
x 8-, 16-, or 32-bit data transfers
x Plug and Play ready
x Parity enabled

15
Video
The onboard, integrated Cirrus Logic CL-GD5480 64-bit VGA chip contains an SVGA controller
that is fully compatible with these video standards: CGA†, EGA†, Hercules†Graphics, MDA†, and
VGA. The standard configuration comes with 2 MB of 10 ns onboard video memory. The video
controller supports pixel resolutions of up to 1600 x 1200 and up to 16.7 M colors.
The SVGA controller supports analog VGA monitors (single and multiple frequency, interlaced
and noninterlaced) with a maximum vertical retrace noninterlaced frequency of 100 Hz.
You cannot add video memory to this system. Depending on the environment, the controller
displays up to 16.7 M colors in some video resolutions. It also provides hardware-accelerated bit
block transfers (BITBLT) of data.
SCSI Controller
The system board includes a Symbios Logic SYM53C876 embedded dual-function, PCI SCSI host
adapter. The SYM53C876 contains two independent SCSI controllers that share a single PCI bus
master interface as a multi-function device. Internally, each controller is identical, capable of
operations using either 8- or 16-bit SCSI providing 10 MB/s (Fast-10) or 20 MB/s (Fast-20)
throughput, or 20 MB/s (Ultra) or 40 MB/s (Ultra-wide). As implemented on the system board,
controller A attaches to a 68-pin 16-bit (wide) SCSI connector interface, controller B attaches to a
50-pin 8-bit (narrow) SCSI connector interface. Each controller has its own set of PCI
configuration registers and SCSI I/O registers. As a PCI 2.1 bus master the SYM53C876 supports
burst data transfers on PCI up to the maximum rate of 132 MB/sec using on-chip buffers.
No logic, termination, or resistor loads are required to connect devices to the SCSI controller other
than termination in the device at the end of the cable. The SCSI bus is terminated on the system
board with active terminators that cannot be disabled. The onboard device must always be at one
end of the bus.

16 System Description
IDE Controller
IDE is a 16-bit interface for intelligent disk drives with AT disk controller electronics onboard.
The PCI/ISA/IDE Accelerator, also known as PIIX4, is a multifunction device on the system board
that acts as a PCI-based Fast IDE controller. The device controls:
x PIO and IDE DMA/bus master operations
x Mode 4 timings
x Transfer rates up to 22 MB/sec
x Buffering for PCI/IDE burst transfers
x Master/slave IDE mode
x Up to two devices per channel; two channels, IDE0 and IDE1
✏NOTE
18-inch maximum length of IDE cable on each channel: you can connect
an IDE signal cable, up to a maximum of 18 inches each, to each IDE
connector on the system board. Each cable can support two devices, one at
the end of the cable and one 6 inches from the end of the cable.
Network Controller
The system board includes a 10BASE-T/100BASE-TX network solution based on the Intel 82558
Fast Ethernet PCI Bus Controller. As a PCI bus master, the controller can burst data at up to
132 MB/sec. The controller contains two receive and transmit FIFO buffers that prevent data
overruns or underruns while waiting for access to the PCI bus. The controller has the following:
x 32-bit PCI bus master interface (direct drive of bus), compatible with PCI Bus Specification,
Revision 2.1
x Chained memory structure with improved dynamic transmit chaining for enhanced
performance
x Programmable transmit threshold for improved bus utilization
x Early receive interrupt for concurrent processing of receive data
x On-chip counters for network management
x Autodetect and autoswitching for 10 or 100 Mbps network speeds
x Support for both 10 Mbps and 100 Mbps networks, capable of full or half duplex, with back-
to-back transmit at 100 Mbps
The network status LEDs on the system board indicate:
x Transmit/receive activity on the LAN
x Valid link to the LAN
x 10/100 Mbps transfer mode

17
Keyboard and Mouse
The keyboard/mouse controller is PS/2-compatible. The system may be locked automatically if
there is no keyboard or mouse activity for a predefined length of time, if specified through the
System Setup Utility (SSU). Once the inactivity (lockout) timer has expired, the keyboard and
mouse do not respond until the previously stored password is entered.
Server Management
Server Management features are implemented using one microcontroller.
Server Board Management Controller (BMC)
All server management functionality is concentrated in the BMC. The BMC and associated
circuitry are powered from + 5V_Standby, which remains active when system power is switched
off and the system is still plugged into AC power.
One major function of the BMC is to autonomously monitor system management events, and log
their occurrence in the non-volatile System Event Log (SEL). These include events such as
over-temperature and over-voltage conditions, fan failure, or chassis intrusion. To enable accurate
monitoring, the BMC maintains the non-volatile Sensor Data Record (SDR), from which sensor
information can be retrieved. The BMC provides an ISA host interface to SDR sensor
information, so software running on the server can poll and retrieve the server's current status.
SEL contents can be retrieved after system failure, for analysis by field service personnel using
system management tools, such as Intel LANDesk
£
Server Manager. Since the BMC is powered
by 5V_Standby, SEL (and SDRR) information is also available via the IMB. An Emergency
Management Card, such as the Intel LANDesk SMM card, can obtain the SEL and make it
remotely accessible using a LAN or telephone line connection. While it receives the proper
current, the BMC performs the following functions:
x Baseboard temperature and voltage monitoring
x VID Bit reading
x Processor presence monitoring and FRB control
x Baseboard fan failure detection and indicator control
x SEL interface management
x SDR Repository interface management
x SDR/SEL timestamp clock
x Baseboard Field Replaceable Unit (FRU) information interface
x System management watchdog timer
x Periodic SMI timer
x Front panel NMI handling
x Event receiver
x ISA host and IMB interface management
x Secure mode control, video blank and floppy write protect monitoring and control, front panel
lock/unlock initiation.
x Sensor event initialization agent
x Wake on LAN via Magic Packet†support

18 System Description
Security
To help prevent unauthorized entry or use of the system, the system includes server management
software that monitors the system intrusion switch.
Security with Mechanical Locks and Monitoring
If installed, you can activate the chassis intrusion alarm switch. When the side door is opened, the
switch transmits an alarm signal to the system board, where server management software processes
the signal. The system can be programmed to respond to an intrusion by powering down or by
locking the keyboard, for example.
Software Locks
The BIOS Setup and the System Setup Utility (SSU) provide a number of security features to
prevent unauthorized or accidental access to the system. Once the security measures are enabled,
you can access the system only after you enter the correct password(s). For example:
x Enable the keyboard lockout timer so that the server requires a password to reactivate the
keyboard and mouse after a specified time-out period  1 to 120 minutes.
x Set and enable an administrative password.
x Set and enable a user password.
x Set secure mode to prevent keyboard or mouse input and to prevent use of the front panel reset
and power switches.
x Activate a hot-key combination to enter secure mode quickly.
x Disable writing to the diskette drive when secure mode is set.
Using Passwords
You can set either the user password, the administrator password, or both passwords. If only the
user password is set, you:
x Must enter the user password to enter BIOS Setup or the SSU.
x Must enter the user password to boot the server if Password on Boot is enabled in either the
BIOS Setup or SSU.
x Must enter the user password to exit secure mode.
If only the administrator password is set, you:
x Must enter the administrator password to enter BIOS Setup or the SSU.
x Must enter the administrator password to boot the server if Password on Boot is enabled in
either the BIOS Setup or SSU.
x Must enter the administrator password to exit secure mode.
If both passwords are set, you:
x May enter the user password to enter BIOS Setup or the SSU. However, you will not be able
to change many of the options.
x Must enter the administrator password if you want to enter BIOS Setup or the SSU and have
access to all of the options.

19
x May enter either password to boot the server if Password on Boot is enabled in either the BIOS
Setup or SSU.
x May enter either password to exit secure mode.
Secure Mode
Configure and enable the secure boot mode by using the SSU. When secure mode is in effect:
x You can boot the system and the operating system will run, but you must enter the user
password to use the keyboard or mouse.
x You cannot turn off system power or reset the system from the front panel switches.
Secure mode has no effect on functions enabled via the Server Manager Module or power control
via the real-time clock.
Taking the system out of secure mode does not change the state of system power. That is, if you
press and release the power switch while secure mode is in effect, the system will not be powered
off when secure mode is later removed. However, if the front panel power switch remains
depressed when secure mode is removed, the system will be powered off.
Summary of Software Security Features
The table below lists the software security features and describes what protection each offers. In
general, to enable or set the features listed here, you must run the SSU and go to the Security
Subsystem Group, menu. The table also refers to other SSU menus and to the Setup utility.
Table 4. Software Security Features
Feature Description
Secure mode How to enter secure mode:
In either the BIOS Setup or the SSU, set either password and enable one, or more,
of the secure mode features:
Secure Mode Timer - if the system is inactive for longer than the set limit, it enters
secure mode.
Secure Mode Hot Key - you can secure the system simply by pressing the key
combination. This means you do not have to wait for the inactivity time-out period.
Secure Mode on Boot - the system boots directly into secure mode.
When the system is in secure mode:
The system can boot and run the operating system, but mouse and keyboard input is
not accepted until the user password is entered.
At boot time, if a CD is detected in the CD-ROM drive or a diskette in drive A, the
system prompts for a password. When the password is entered, the system boots
from CD or diskette and disables the secure mode.
If there is no CD in the CD-ROM drive or diskette in drive A, the system boots from a
hard drive and automatically goes into secure mode. All enabled secure mode
features go into effect at boot time.
To leave secure mode: Enter the correct password.
continued

20 System Description
Table 4. Software Security Features (continued)
Feature Description
Disable writing to
diskette In secure mode, the system will not boot from or write to a diskette unless a password is entered. To set this feature, use the SSU Security Subsystem Group.
To write-protect access to diskette whether the system is in secure mode or not, use
the Setup main menu, Floppy Options, and specify Floppy Access as read only.
Disable the power
and reset buttons Enable the feature through the SSU. Then the power and reset buttons are disabled when the system is in secure mode.
Set a time-out period
so that keyboard and
mouse input are not
accepted
Also, screen can be
blanked, and writes to
diskette can be
inhibited
Specify and enable an inactivity time-out period of from 1 to 120 minutes.
If no keyboard or mouse action occurs for the specified period, attempted keyboard
and mouse input will not be accepted.
The monitor display will go blank, and the diskette drive will be write-protected (if
these security features are enabled through Setup or the SSU).
To resume activity: Enter the correct password(s).
Control access to
using the SSU: set
administrative
password
To control access to setting or changing the system configuration, set an
administrative password and enable it through Setup or the SSU.
If both the administrative and user passwords are enabled, either can be used to
boot the system or enable the keyboard and/or mouse, but only the administrative
password will allow Setup and the SSU to be changed.
To disable a password, change it to a blank entry or press CTRL-D in the Change
Password menu of the Administrative Password Option menu found in the Security
Subsystem Group.
To clear the password if you cannot access Setup or the SSU, change the Clear
Password jumper (see Chapter 5).
Control access to the
system other than
SSU: set user
password
To control access to using the system, set a user password and enable it through
Setup or the SSU.
To disable a password, change it to a blank entry or press CTRL-D in the Change
Password menu of the User Password Option menu found in the Security
Subsystem Group.
To clear the password if you cannot access Setup or the SSU, change the Clear
Password jumper (see Chapter 5).
Boot without
keyboard The system can boot with or without a keyboard. During POST, before the system boots, the BIOS automatically detects and tests the keyboard if it is present and
displays a message. There is no entry in the SSU to enable or disable a keyboard.
Specify the boot
sequence The sequence that you specify on the menu in the SSU Multi-Boot Group will determine the boot order. If secure mode is enabled (a user password is set), then
you will be prompted for a password before the system fully boots. If secure mode is
enabled and the “Secure Boot Mode” option is also enabled, the system will fully
boot but will require a password before accepting any keyboard or mouse input.