Compaq 1245 specifications System Interrupts, Hardware System Function

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Maintenance & Service Guide

Presario 1200 Series

Model: 1245

Home Page Notice Preface Product Description Troubleshooting Illustrated Parts Catalog Removal & Replacement Procedures Specifications Pin Assignments Battery Pack Operations

Specifications

System Interrupts

		System Interrupts

Hardware		System Function
IRQ
IRQ00		Timer Interrupt
IRQ01		Standard 101/102-Key or Microsoft
		Natural Keyboard
IRQ02		Programmable interrupt controller
IRQ03		Compaq Presario 56K-DF
IRQ04		Communications Port (COM1)
IRQ05		ES1869 Plug and Play AudioDrive
IRQ06		Standard Floppy Disk Controller
IRQ07		Printer Port (LPT1)
IRQ08		System CMOS/real time clock
IRQ09		(free)
IRQ10		OPTi 82C861 PCI to USB Open Host
		Controller
IRQ11		IRQ Holder for PCI Steering
IRQ11		NeoMagic MagicGraph 128XD
IRQ12		Synaptics PS/2 TouchPad
IRQ13		Numeric data processor
IRQ14		Primary IDE controller (dual fifo)
IRQ14		Opti Viper Max Dual PCI IDE Controller
IRQ15		Secondary IDE controller (dual fifo)
IRQ15		Opti Viper Max Dual PCI IDE Controller

Return to the index list of Specifications.

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Contents Maintenance & Service Guide Maintenance & Service Guide Symbols PrefaceCompaq Product DescriptionDisplay 12 HPA Processor Models & FeaturesBattery ES NiMH System Memory 32 MB Hard Drive CD Drive 24× MAX ModemFront Panel Components Controls and LightsLeft Side Components Right Side Components Bottom of Unit Rear Connectors Power Management for Windows Display Properties Power Management SettingsPower Management Properties Sleep Hibernation Mode Mode To Initiate To End IndicatorsRebooting After a Lockup Servicing Your Computer Full Off Mode Illustrated Parts Catalog Place cursor over each device to obtain its part number System UnitBoards Place cursor over each device to obtain its part numberDisplay Assembly Mass Storage Devices Place cursor over each device to obtain its part numberMiscellaneous Cables Kit Power Cord CablesMiscellaneous Hardware and Plastics Kit Miscellaneous Hardware and Plastics KitMiscellaneous Parts Spare Part Number Documentation and SoftwareDescription Removal and Replacement Procedures Serial Number LocationElectrostatic Discharge Generating StaticService Considerations Plastic Parts Cables and ConnectorsSelect the desired illustration ZIF Connectors Ribbon cable position for the 3.2-GB hard drive Ribbon cable position for the CD drive Ribbon cable position for the diskette drive Back to Cables and Connectors Preparing the Computer for Disassembly Removing the Battery Pack To remove the battery pack, complete the following stepsReplacement Procedures Prepare the computer for disassembly Removing the Palmrest Cover with Touch PadWhen replacing the palmrest cover, ensure Return to Removal Removing the Heatspreader Removing the Keyboard Removing the Processor To replace the processor complete the following steps Maintenance & Service Guide Removing the Hard Drive Presario 1200 Series Models Replacement Procedures Removing the CD Drive Maintenance & Service Guide To replace the CD drive, reverse the previous procedures Removing the Battery Charger Board Removing the Modem To replace the modem, reverse the previous procedures Removing the Display Panel Assembly Maintenance & Service Guide Maintenance & Service Guide Maintenance & Service Guide When removing the display panel assembly Return to Removal Removing the Upper CPU Cover Removing the Speaker Assembly Fan Assembly System Board Dip Switch Settings Memory Module Removing the Diskette DriveReplacement Procedures Removing the Fan Assembly System Board Dip Switch Settings Memory ModuleTo replace the fan assembly, reverse the previous procedure Removing the System Board Remove three standoffs from the system board Maintenance & Service Guide Remove three screws from the system board To replace the system board, reverse the previous procedures Removing the Memory Module Memory ModuleReplacement Procedures Specifications Physical and EnvironmentalHardware System Function System InterruptsSystem Interrupts Hardware DMA System Function System DMASystem DMA System I/O Address Address Hex System Function Shipping ConfigurationSystem I/O Address System Memory Catalog System Memory CatalogDisplay Memory Expansion Environmental Requirements Battery PackEnergy Diskette Drive Hard Drives Capacity Per Drive Formatted Logical ConfigurationHard Drives Seek TimesRotational Speed 24× CD Drive DimensionsCD Drive Typical Transfer RateConnector Pin Assignments Conditioning a Battery Pack Battery Pack Operating TimeIncreasing Battery Pack Operating Time Disposing of a Used Battery PackTroubleshooting Follow the Preliminary StepsPreliminary Steps Run Computer CheckupProbable Cause Power-On Self Test PostRunning Post Recommended ActionView System Information Inspect Compaq DiagnosticsPerform Computer Checkup Test Contacting Compaq Support Shipping PreparationClearing the Power-on Password Remove the Palmrest Cover with Touch PadDiagnostic Error Codes Select error codes by number or typeTroubleshooting Without Diagnostics Before Replacing PartsSolving Minor Problems Solving PC Card Problems Solving Power Problems