System Resources and IRQ

The following table shows the available system resources for your computer and the port replicator. The default values are highlighted. The values not highlighted are alternate values that are selectable from the ThinkPad Configuration program or from an application program.

System Resources IRQ I/O Address (Hex) Memory Address (Hex) DMA Channel
Audio 5 1080-10BF, 10E0-10EF, 10D0-10DF, 10FC-10FF, and 10F8-10FB None None
Audio (DOS Emulation) None 0220-022F, 0240-024F, 0260-026F, or 0270-027F

0330-0331, 0300-0301, 0310-0311, or 0320-0321

None 1
CD-ROM drive or DVD drive or IDE hard disk drive in the UltraBay FX 15 0170-0177 and 0376 None None
Diskette controller 6 03F0-03F5 and 03F7 None 2
Hard disk drive 14 01F0-01F7 and 03F6 None None
Infrared port 3 02F8-02FF None 3
4 03F8-03FF
3 02E8-02EF
4 03E8-03EF
Disabled Disabled
Joystick port None 0200-0203 None None
Keyboard 1 0060 and 0064 None None
Math co-processor exception 13 None None None
Modem 11 FC88-FC8F, and 1400-14FF F4000000-F40000FF None
Parallel port 7 or 5 03BC-03BE None Disabled, 1, 2, or 3
5 or 7 0378-037F
5 or 7 0278-027F
Disabled Disabled
PC Card (Dependent on the PC Card type) None
PCMCIA controller (CardBus controller) 11 None 02000000-02000FFF, and 02001000-02001FFF None
Real-time clock 8 0070-0071 None None
Serial port 4 03F8-03FF None None
3 02F8-02FF
4 03E8-03EF
3 02E8-02EF
Disabled Disabled
Timer 0 0040-0043 None None
TrackPoint or mouse 12 None None None
USB 11 1060-107F None None
Video controller 11 03B0-03BB, 03C0-03DF A0000-BFFFF, C0000-CBFFF, F5000000-F5FFFFFF, F4400000-F47FFFFF, and F4100000-F41FFFFF None
Note:
  • When you enable ECP as the printer operating mode from the ThinkPad Configuration program or BIOS Setup Utility, you must select one value from the four selections (including "disabled").
  • When you use Windows 95 OSR2, do not assign this address.
  • In Windows 95, do not use the Device Manager to change the IRQ of the audio device. Use the BIOS Setup Utility. Normally, the same IRQ is assigned to the PCI Audio device and DOS Emulation mode. See Changing the Audio IRQ Resource Setting in Windows 95.

Changing the Audio IRQ Resource Setting in Windows 95

If you need to change this default setting, you need to modify it in BIOS.

  1. Save your work and restart the computer.
  2. While the IBM ThinkPad logo is being displayed, press F1 to enter the BIOS Setup Utility.
  3. Use the up/down cursor keys to select Config and press Enter.
  4. Select Advanced Setup and press Enter.
  5. Select PCI and press Enter.
  6. Select 2nd PCI and use thespace or - keys to change the IRQ setting.
  7. Press F10 to save and exit the BIOS Setup Utility.