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
Interrupts
109
Interrupts
Table 4-23 recommends the logical interrupt mapping of interrupt sources; it reflects a
typical configuration, but these interrupts can be changed by the user. Use the
information to determine how to program each interrupt. The actual interrupt map is
defined using configuration registers in the PIIX4E and the I/O controller. I/O
RedirectionRegisters inthe I/O APIC areprovidedfor eachinterrupt signal; thesignals
define hardwareinterrupt signal characteristicsfor APIC messages sentto localAPIC(s).
Note: To disable either IDE controller and reuse the interrupt: if you plan to disable
either IDE controller to reuse the interrupt for that controller, you must physically
unplug the IDE cable from the board connector (IDE0) if a cable is present. Simply
disabling thedrive by configuring the SSUoption does not make theinterrupt available.
Table 4-23 Interrupt I/O Descriptions
Interrupt I/O APIC level Description
INTR INT0 Processor interrupt
NMI N/A NMI from PIC to processor
IRQ1 INT1 Keyboard interrupt
Cascade INT2 Interrupt signal from second 8259 in PIIX4E
IRQ3 INT3 Serial port A or B interrupt from SIO device (user can
configure)
IRQ4 INT4 Serial port A or B interrupt from SIO device (user can
configure)
IRQ5 INT5 Parallel port II
IRQ6 INT6 Diskette port
IRQ7 INT7 Parallel port
IRQ8_L INT8 RTC interrupt
IRQ9 INT9 Signal control interrupt (SCI) used by ACPI-compliant
OS
IRQ10 INT10
IRQ11 INT11