HP 1242, 1234 manual System Interrupts, Hardware IRQ System Function

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Nonoperating

1.5 G

NOTE: Applicable product safety standards specify thermal limits for plastic surfaces. Compaq Presario 1200 Series Portable Computers operate well within this range of temperatures.

System Interrupts

 

System Interrupts

Hardware IRQ

System Function

IRQ0

Timer Interrupt

IRQ1

Standard 101/102-Key or Microsoft Natural

 

Keyboard

IRQ2

Programmable interrupt controller

IRQ3

Compaq Presario 56K-DF

IRQ4

Communications Port (COM1)

IRQ5

ES1869 Plug and Play AudioDrive

IRQ6

Standard Floppy Disk Controller

IRQ7

Printer Port (LPT1)

IRQ8

System CMOS/real time clock

IRQ9

(free)

IRQ10

OPTi 82C861 PCI to USB Open Host Controller

IRQ10

IRQ Holder for PCI Steering

IRQ11

IRQ Holder for PCI Steering

IRQ11

IRQ Holder for PCI Steering

IRQ11

NeoMagic MagicGraph 128XD

IRQ11

Texas Instruments PCI-1131 CardBus Controller

IRQ11

Texas Instruments PCI-1131 CardBus Controller

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

System DMA

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Contents Removal Sequence Before You BeginParts Catalog IndexIndex Symbols PrefaceProduct Description Specifications Parts CatalogProduct Description Models and Features AMD-K6 266 MMXModels and Features Front Bezel Lights Controls and LightsControls Lights Left Side Components Models Features Controls LightsLeft Side Components Card Diskette Eject Drive Lever Slot ButtonRight Side Components Models Features Controls Lights Left Side ComponentsBattery CD Drive Compartment Right Side ComponentsBottom Unit Rear Connectors Power Management For Windows Bottom of UnitBottom of Unit Memory Feet CompartmentRear Connectors Rear ConnectorsPower Management For Windows Rear Connectors Power Management for Windows Troubleshooting PostPreliminary Steps Power-On Self Test Post Running PostDiagnostic Error Codes View System Information Inspect Compaq DiagnosticsComputer Checkup Test AudioContacting Compaq Support Shipping PreparationTroubleshooting Without Diagnostics Before Replacing PartsSolving Minor Problems Solving Printer Problems Solving PC Card ProblemsSolving Power Problems Solving Touch Pad/Pointing Device ProblemsBattery Pack Operating Time Connector Pin Assignments Illustrated Parts Catalog System Unit System UnitSystem Unit BoardsBoards Display Assembly Display AssemblySystem Unit Boards Mass Storage Devices System Unit Boards Display AssemblyMass Storage Devices Mass Storage Devices Miscellaneous Cables KitMiscellaneous Cable Kit Cables Power CordCables Miscellaneous Hardware Plastics Kit Miscellaneous Hardware and Plastics KitsMiscellaneous Parts Documentation Software Miscellaneous Parts Miscellaneous PartsDocumentation Software Documentation Documentation and SoftwareInfo. Not Available QuickFind Part Number SuffixRemoval and Replacement Procedures Serial Number LocationElectrostatic Discharge Generating StaticService Considerations To service the computer, you need the followingCables Cables and ConnectorsRemoving a Cable from a ZIF Connector Select the desired illustrationZIF Connectors Maintenance & Service Guide Ribbon cable position for the CD drive Ribbon cable position for the diskette drive Back to Cables and Connectors Removing the Battery Pack Battery PackTo replace the battery Battery pack tabRemove the battery Previous proceduresRemoving the Palmrest Cover with Touch Pad Palmrest Cover with Touch PadBattery Operations Heatspreader Specifications Parts Catalog Removal SequenceRemoving the Heatspreader To remove the heatspreader, complete the following stepsKeyboard Removing the KeyboardTo remove the keyboard, complete the following steps Cable from the ZIF Connector onDisconnect the flex To replaceRemoving the Processor To remove the processor, complete the following stepsTo replace the processor complete the following steps Removing the 3.2-GB, 4.1-GB, and 6.4-GB Hard Drives Hard DrivesHard drive Disconnect the hardDrive data cable from Remove fromComplete the following To remove the hardDrive mounting bracket StepsRemoving the CD Drive Open the CD drive tray using a small paper clip Drive and remove Disconnect the CDDrive cable from the CD CD drive fromRemoving the Battery Charger Board Battery Charger BoardRemoving the Modem Modem DisconnectModem cable from To replace the modemRemoving the Display Panel Assembly Display Panel AssemblyCable attached to Display panel assemblyFrom the ZIF connector On the system boardBacklight cable attached Assembly fromTo the display panel Display panel Assembly and removeSupport the back Two screws from eachWhen removing Panel assembly withPanel assembly, reverse Assembly flexRemoving the Upper CPU Cover Upper CPU CoverRemoving the Speaker Assembly Speaker AssemblyDiskette Drive Fan Assembly System Board Dip Switch Settings Memory ModuleRemoving the Diskette Drive To remove the diskette drive, complete the following stepsBoard Diskette drive dataCable from the system To replace the disketteFan Assembly Removing the Fan AssemblySystem Board Dip Switch Settings Memory Module Fan assembly Assembly, reversePrevious procedure To remove the fanTo remove the system board, complete the following steps Dip Switch Settings Memory ModuleRemoving the System Board System BoardRemove three Standoffs fromMounting rails Remove two screwsFrom the CD Drive Remove the mountingScrews from the system Up the right side of the system board and pull Pull the Pcmcia eject lever out straight, liftForward to remove the system board from Specifications Removing the Memory Module Memory ModuleModule and unplug Pull side levers toRelease the memory Memory module fromIndex Presario 1200 SeriesStand-Alone Battery Pack Power Requirements DimensionsWeight AC Power RequirementsSystem Interrupts Hardware IRQ System FunctionAddress Hex System Function Shipping Configuration Hardware DMA System FunctionSystem Memory Catalog Memory Address System FunctionContrast Ratio Display DimensionsTotal Power Consumption BrightnessNumber of Read/Write Heads Memory Expansion System Memory Expansion Board Total MemoryCylinders High/Low Capacity Per Drive Information not availableTransfer Rate Logical ConfigurationSeek Times Capacity Per DriveNickel Metal Hydride NiMH Lithium Ion Li ion Dimensions Access TimeAverage Random Access Time Spin Up time Weight Battery Pack Operating Time Energy
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1242, 1234 specifications

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