DMA Channel Assignment, IRQ12, IRQ13, IRQ14, IRQ15 | Acer 420

IRQ Assignment Map

Interrupt Channel	Function(Hardware)

IRQ12	Alps Pointing-device

IRQ13	Numeric data processor

IRQ14	Primary IDE controller

IRQ15	Secondary IDE controller

DMA Channel Assignment

DMA Channel	Function(Hardware)

1	ECP Printer Port (LPT1)

2	Standard Floppy Disk Controller

4	Direct Memory Access Controller

Chapter 1

37

Image 45

Acer 420 manual DMA Channel Assignment, IRQ12, IRQ13, IRQ14, IRQ15

Contents

Part NO. VD.T19V5.001 Acer TravelMate 420 Series Revision History Date Chapter Updates Disclaimer Copyright Conventions Preface Page Table of Contents Chpater Troubleshooting Chapter Jumper and Connector LocationsAppendix C Test Compatible Components 121 Features ChapterWay scroll button Chapter Keyboard and Pointing Device One type II CardBus PC Card slots Upgradeable memory System Block Diagram Top View Board Layout FIR Bottom View Outlook View Front ViewIcon Description Chapter Left Panel Right Panel Rear Panel Bottom Panel Icon Function Description Indicators Lock Key Description Lock Keys Embedded Numeric Keypad Desired Access Num Lock On Num Lock Off Key Icon Description Windows Keys Hot Keys Chapter Euro Symbol Click on Start, Settings, Control PanelClick on the Language tab and click on Details Launch Keys Launch Key Default application Mail Detection Touchpad Touchpad BasicsFunction Left Button Right Button Scroll Button Tap Function Left Button Right Button Scroll Button Tap Specification Hardware Specifications and ConfigurationsProcessor Second Level Cache LAN Interface Memory CombinationsModem Interface Hard Disk Drive Interface IDE/ATAPI DVD-ROM Interface CD CD-DA, CD+EG, CD-MIDI, CD-TEXT, CD-ROM, CD-ROM XA, Mixed Vendor & model name Toshiba SD2212 Audio Interface Video Resolutions Mode for both LCD and CRTVideo Interface Parallel Port Pcmcia Port USB PortSystem Board Major Chips Keyboard LCD Inverter Specification BatteryCPT CLAA141XF01 TX38D91VC1FAC Duty Ton Period Electrical Characteristics Thermal Electrical specificationDacbrig 0 V, PWM Dacbrig 0 AC Adapter Environmental Requirements Power Management VGA Bios Mechanical SpecificationMemory Address Map Address Map Mobility Radeon IRQ Assignment Map IRQ12 DMA Channel AssignmentIRQ13 IRQ14 Chapter Navigating the Bios Utility Bios Setup Utility Chapter Info This menu provides you the information of the systemParameter Description Parameter Description Main Parameter Description Format/Option Parameter Description Options System DevicesDMA DMA1/ DMA3 Oot Info Xit Security Parameter Description Option Clear or Set Removing a Password Page Boot Exit System Diagnostic Diskette Bios Flash UtilityPage Running Diagnostics Program Page Chapter Page Chapter Chapter Chapter Machine Disassembly and Replacement Before You Begin General Information Disassembly Procedure Flowchart Safety Screw M2.5X0.45+6FP-ZKNL Screw ListScrew M2.0X0.4P+3FP-NI Removing the Battery Pack Slide the optical drive latch Then remove the optical drive Removing the Optical Module/HDD Module and Memory Removing the Keyboard Removing the Keyboard/ LCD Module and VGA Board Chapter Disassembling the Main Unit Chapter Page Chapter Page Disassembling the LCD Module Disassembling the HDD Module Disassembling the External Modules Chapter Symptoms Verified Go To Troubleshooting System Check Procedures External Diskette Drive CheckExternal CD-ROM/DVD-ROM Drive Check Keyboard or Auxiliary Input Device Check Memory Check Power System Check Check the Power Adapter Display Check Touchpad Check Sound Check Power-On Self-Test Post Error Message Error Message List Index of Error MessagesError Messages FRU/Action in Sequence Setup 02F0 CPU ID LCD-Related Symptoms Index of Symptom-to-FRU Error MessageIndicator-Related Symptoms Power-Related Symptoms Memory-Related Symptoms PCMCIA-Related SymptomsSpeaker-Related Symptoms Power Management-Related Symptoms Keyboard/Touchpad-Related Symptoms Peripheral-Related SymptomsModem-Related Symptoms LCD FPC Intermittent Problems Dimm Undetermined Problems Code Beeps Post Routine Description Post Task Routines Code Beeps Post Routine Description Chapter Code Beeps For Boot Block in Flash ROM Index of Flash Bios Error Message Index of flashing Bios Error Message using PHLASH.EXEError Message Action in Sequence Chapter Top View Jumper and Connector Locations Setting Power Button Onsystem on OFF System OFFNone Stand by Hibernate Bottom View 100 Chapter FRU Field Replaceable Unit List Exploded Diagram Chapter 103 Logic UP Assy Wireless Chapter 105 DVD Assy CD-ROM Assy Chapter 107 Combo Assy UP Assy Logic Assywire Less BOARD-TOUCHPAD Button Board Battery LI-ION 9 CELLS-PANASONICUP Assy Logic Assywire Less BOARD-TOUCHPAD UP Assy Logic Assywire Less BOARD-MDC Card Chapter 109 UP Assy Logic Assywire Less UP Assy Logic Assywire Less Support BracketLower Case Dimm Cover Chapter 111 FDD FPC FDD Case FDD Mylar FDD Back Cover HDD ConnectorIBM Cascade HDD 2.5 20G IBM Cascade HDD 2.5 30G Chapter 113 LCD 15 Sxga IBM ITSX95C LCD 15.0 XGA Hannstar HSD150PX14-ALCD 15 Sxga Hitachi TX38D91VC1FAC LCD Inverter Chapter 115 ASSY, CD DVD-ROM Drive 8X Toshiba SR-C2612 CD-ROM Drive 24X Teac CD-224E-C85ROM Assy DVD-ROM Drive 8X Liteon LSD-081 Combo DVD-ROM Drive 8X Hitachi GDR-8081N Chapter 117 Appendix a TravelMate 420 SeriesAppendix a 118 Appendix a Main Features Appendix a 120 Appendix B Test Compatible Components Microsoft Windows XP Home Environment Test Specifications USB JAZ 2GB Appendix B 123USB HUB Link HUB HP 10MB Appendix B 125 Microsoft Windows XP Pro Environment Test Pcmcia Appendix B 127 Microsoft Windows 2000 Environment Test 128 Appendix C Online Support Information 130 Core voltage 23 package 23 type Index Index