Dell 100-Mbps manual Interrupt Assignments, Jumper Descriptions

Page 22

Table 1-2. Jumper Descriptions

 

 

Default

Jumper

Description

Setting

 

 

 

PSWD

Password enable/disable.

Installed (password feature

 

Jumper installed, activates

enabled)

 

password feature.

 

BIOS

Used for internal Dell

Not installed (reserved, do not

 

debug tool.

change)

RSRVD4

Reserved.

Not installed (reserved, do not

RSRVD3

 

change)

RSRVD2

 

 

RSRVD1

 

 

200MHZ

Microprocessor speed.

Installed if the micro-

 

 

processor’s internal speed is

 

 

200 MHz, or else not

 

 

installed

180MHZ

Microprocessor speed.

Installed if the micro-

 

 

processor’s internal speed is

 

 

180 MHz, or else not

 

 

installed

 

 

 

Interrupt Assignments

 

Table 1-3. Interrupt Assignments

IRQ Line

Used By/Available

 

 

IRQ0

Generated by system timer.

IRQ1

Generated by keyboard controller to indicate that keyboard’s out-

 

put buffer is full.

IRQ2

Generated internally by interrupt controller to enable IRQ8

 

through IRQ15.

IRQ3

Generated by super I/O controller to indicate that device con-

and

nected to corresponding serial port requires service (IRQ3 for

IRQ4

COM2 or COM4; IRQ4 for COM1 or COM3).

IRQ5

Available for use by expansion card unless this IRQ line is used

 

by secondary parallel port.

IRQ6

Generated by super I/O controller to indicate that diskette or tape

 

drive requires service.

IRQ7

Generated by super I/O controller to indicate that device con-

 

nected to parallel port requires service.

 

 

1-14 Dell OptiPlex GXpro Systems Service Manual

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Contents 659,&0$18$ Page Contents Chapter Beep Codes and Error Messages Chapter Basic TroubleshootingChapter Removing and Replacing Parts Index FiguresTables 16. Expansion-Card Cage RemovalPage Read This First System Overview System Features System Unit Orientation Front-Panel Features Dual-Processor Capability Advanced Expansion SubsystemAudio Controller Hard-Disk Drive OptionsEnhanced Dual-Interface Eide Subsystem PCI Video CardDesktop Chassis Thermal MonitoringSystem Unit System Power SupplyPin Assignments for the DC Power Connectors Smart SupportDC Power Connector P1 DC Power Distribution DC Power Connector P7Power Distribution System Board Layout Video MemoryMain Memory System Board JumpersInterrupt Assignments Jumper DescriptionsDMA Channel Assignments IRQ14Technical Specifications Technical SpecificationsNIC CtrlAltEnter To 149 F Page Basic Troubleshooting Initial User ContactExternal Visual Inspection Observing the Boot Routine Internal Visual Inspection Running the Diskette-Based Diagnostics Eliminating Resource ConflictsGetting Help Beep Codes and Error Messages Post Beep CodesPost Beep Codes System Error Messages HaltedSystem Error Messages System could not suc System Setup program Incorrect configuration During memory test Faulty or improperly System does not recog Faulty diskette, diskette MS-DOS unable to Defective sectors on dis At system start-up One or both micro Removing and Replacing Parts Recommended ToolsPrecautionary Measures Protection of the EquipmentFloor Stand Pull the floor stand away from the system unitSystem Unit Cover System-Unit Cover RemovalEject, Power, and Reset Buttons Eject, Power, and Reset Button RemovalFront-Panel Inserts Front-Panel Insert RemovalIndicator Card Indicator Card RemovalSpeaker Speaker RemovalDrives Drive HardwareDrives in the Drive Cage 5-Inch Diskette Drive Removal10 .25-Inch Drive Removal Hard-Disk Drives Lift the hard-disk drive bracket out of the system unit12. Hard-Disk Drive Removal System Power Supply 13. Power Supply RemovalMicroprocessor Fan 14. Microprocessor Fan RemovalSystem Board Components 15. System Board ComponentsExpansion Cards Expansion-Card CageExpansion Card 17. Expansion-Card RemovalRiser Board 18. Riser Board RemovalDIMMs 19. Dimm RemovalMicroprocessor/Heat Sink Assembly 21. Microprocessor Securing Clip22. Microprocessor Removal Terminator or Add-In Card Terminator CardAdd-In Card 24. Add-In Card RemovalSystem Battery Remove the batterySystem Board Remove the system board as followsSystem Setup Program System Setup Screens USBTable A-1. System Setup Categories Be shadowed or cached. If video problems Check the monitor documentation to make Table A-1. System Setup Categories Index Dskt connector, 1-12,4-16dual-processing,1-5 ECC DIMMs LINE-IN connector, 1-12,4-16 USB description Location, 1-4,1-12