After you apply Serice Pack 3 to Windows 2000, or install Windows 2000 slipstreamed with Service Pack 3, some Personal Computer Memory Card International Association (PCMCIA) devices, AKA PC-Card, don't work correctly.

Windows 2000 SP3 disables PCMCIA-to-PCI IRQ routing. Some 16-bit PC Card devices require PCMCIA-to-PCI IRQ routing.

You can enable PCMCIA-to-PCI IRQ routing:

1. Use the Registry Editor to navigate to:


2. Add Value Name DisableIsaToPciRouting, a REG_DWORD data type, and set the data value to 0.

3. Shutdown and restart your computer.