Specifications
Table Of Contents
- SGI™ 1400 Server Family Maintenance and Upgrades Guide
- List of Figures
- List of Tables
- About This Guide
- Working Inside the System
- Tools and Supplies Needed
- Safety: Before You Remove the Access Cover
- Warnings and Cautions
- Removing the System Access Cover
- Installing the Access Cover
- Working in the Subchassis and Electronics Bay
- Installing PCI Boards
- Removing a PCI option Board
- Removing the Front Panel Board
- Installing the Front Panel Board
- Removing the Diskette Drive
- Installing the Diskette Drive
- Peripheral Drives
- System Fans
- The Power Share Board
- Upgrading Baseboard Components
- SGI 1400 Server SCSI Backplane Installation
- Technical Reference
- Baseboard Connectors
- Main Power Connector
- Auxiliary Power
- Diskette Drive
- Front Panel Connector
- The SMM Connector
- The IPMB Connector
- VGA Video Port Connector
- Keyboard and Mouse
- Parallel Port
- Serial Ports A and B
- Universal Serial Bus
- Narrow SCSI Connector
- Wide SCSI Connector
- Internal IDE Connector
- The Hard Drive LED Connector
- ISA Connector Pinouts
- The PCI Connectors
- Baseboard Jumpers
- System I/O Addresses
- Memory Map Address Range
- Interrupts
- Video Modes
- Baseboard Connectors
- Equipment Log and Configuration Worksheets
- Environmental Specifications
- Chassis Warnings and Safety
- Index

Baseboard Jumpers
101
CMOS Clear Jumper
The jumper at pins 1, 2, and 3 controls whether settings stored in CMOS nonvolatile
memory (NVRAM) are retained during a system reset.
Procedure to restore the system’s CMOS and RTC to default values:
1. See “General Procedure to Change a Jumper Setting” on page 100.
2. Move the CMOSjumper frompins 1 and2 to pins 2and 3 (theClear CMOSmemory
position).
3. Reinstall the access cover for your safety (using the original screws), and connect
the power cords to the system.
4. Turn the system on. Wait for POST to complete and for the messages “NVRAM
cleared by jumper” and “Press F2 to enter Setup” to appear. This automatically
reprograms CMOS and RTC to their default settings, except for the password.
5. Enter Setup and make any changes necessary (for example, changing the boot
device). Press F10 to save the new Setup configuration and exit Setup.
6. Turn off the system, and disconnect all AC power cords from the system.
7. Again remove the access cover.
8. Move thejumper from pins 2and 3back to pins 1 and 2 (theProtect CMOS memory
position).
9. Reinstall the access cover using the original screws, and connect the power cords to
the system.
10. Run BIOS Setup or the SSU to verify the correct settings. See Chapter 3 in the
SGI 1400 Server Family User’s Guide.
Password Clear Jumper
The jumper at pins 5, 6, and 7 controls whether a stored password is retained or cleared
during a system reset.
Procedure to clear the current password and then enter a new one:
1. See “General Procedure to Change a Jumper Setting” on page 100.
2. Move the Password jumper from pins 5 and 6 to pins 6 and 7.