Manuals / IBM / Computer Equipment / Personal Computer

IBM 2289, 6824 manual The following tables list the IRQ and DMA channel assignments

Models: 2289 6824

1 60

Page 53

Appendix D. Interrupt request and direct memory access channel assignments

	The following tables list the IRQ and DMA channel assignments.

IRQ	System resource

NMI	Critical system error

SMI	System-management interrupt for power management

0	Timer

1	Keyboard

2	Cascade interrupt from slave PIC

3	COM2 (some models only)

4	COM1

5	Available to user

6	Diskette controller

7	LPT1

8	Real-time clock

9	Video, ACPI

10	Available to user

11	Available to user

12	Mouse port

13	Math coprocessor

14	Primary IDE (if present)

15	Secondary IDE (if present)

	Note: The default settings for COM 1 (IRQ 4), COM 2 (IRQ 3), and LPT 1 (IRQ 7)

can be changed to another IRQ.

DMA channel	Data width	System resource

0	8 bits	Open

1	8 bits	Open

2	8 bits	Diskette drive

3	8 bits	Parallel port (for ECP or EPP)

4		Reserved (cascade channel)

5	16 bits	Open

6	16 bits	Open

7	16 bits	Open

Page 53

Image 53

IBM 2289, 6824 manual The following tables list the IRQ and DMA channel assignments, can be changed to another IRQ

Contents

NetVista User Guide Type 2289 andPage NetVista User Guide Type 2289 andSecond Edition October Appendix A. Updating System iv User Guide DANGER Safety InformationTo avoid a shock hazard DANGERModem safety information Lithium battery noticeDanger of explosion if battery is incorrectly replaced Do notConsignes de sécurité relatives au modem Laser compliance statementviii User Guide DANGERInformation resources Overviewx User Guide Features Chapter 1. Installing optionsMicroprocessor MemoryInput/output features System management featuresPower Video subsystemIBM preinstalled software Security featuresOperating systems preinstalled varies by model type Operating systems tested for compatibility1This section lists the physical specifications for your computer SpecificationsHandling static-sensitive devices Available optionsTools required 6 User Guide Installing external options1and 2USB connectors Locating the connectors on the front of your computer8 User Guide Locating the connectors on the rear of your computerDescription Obtaining device driversConnector Removing the cover Identifying parts on the system board Locating components6Power supply 1Microprocessor and heat sinkInstalling memory What to do next 14 User Guide Installing adaptersWhat to do next Installing internal drivesDrive specifications Installing a drive 18 User Guide Connecting the first IDE CD-ROM drive or DVD-ROM driveConnecting an additional IDE hard disk drive Connecting an additional IDE CD-ROM drive or DVD-ROM drivePhysical security What to do next1 Padlock loop 2 Integrated cable lock 3 Rope clip Changing the batteryWhat to do next Replacing the cover and connecting the cables 22 User Guide Erasing a lost or forgotten password clearing CMOS9. Repeat steps 2 through 4 on page 24 User Guide Starting the IBM Setup Utility program Chapter 2. Using the IBM Setup Utility programViewing and changing settings Exiting from the IBM Setup Utility programAdministrator password User passwordSetting, changing, and deleting a password Using Security Profile by DeviceSelecting a temporary startup device Selecting a startup deviceChanging the startup device sequence Chapter 2. Using the IBM Setup Utility program28 User Guide Updating flashing BIOS from your operating system Updating flashing BIOS from a disketteAppendix A. Updating System Programs System programsRecovering from a POST/BIOS update failure ATH ENTER Appendix B. Manual modem commandsBasic AT commands 32 User Guide Extended AT commandsAppendix B. Manual modem commands Fax Class 1 commands MNP/V.42/V.42bis/V.44 commandsFax Class 2 commands 34 User GuideVoice commands #VTD #VTM #VTS #VTX #VBQ? #VBS #VBT #VCI? #VLS #VRA #VRN #VRX #VSDB #VSK #VSP #VSR #VSSI/O address map Appendix C. System address mapsSystem memory map Size bytes Address range hexDescription 38 User GuideAppendix C. System address maps DMA I/O address mapDescription Address hexBits Byte pointercan be changed to another IRQ Note The default settings for COM 1 IRQ 4, COM 2 IRQ 3, and LPT 1 IRQThe following tables list the IRQ and DMA channel assignments 42 User Guide Television output notice Appendix E. NoticesIBM Director of Licensing IBM Corporation North Castle Drive Armonk, NY U.S.A44 User Guide TrademarksIndex A Page Page 1P P/N 49P1040 Part Number 49P1040 Printed in U.S.A

The following tables list the IRQ and DMA channel assignments.

Note: The default settings for COM 1 (IRQ 4), COM 2 (IRQ 3), and LPT 1 (IRQ 7)

can be changed to another IRQ.