JSI Tip 5706. Some 16-bit PC Card (PCMCIA) devices stop working after you apply Windows 2000 Service Pack 3 (SP3)?

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.

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