JSI Tip 0212 - How do I set the IRQ of my PC-CARD?

Windows NT has no GUI for setting up a PC-CARD's IRQ. You must edit the registry and enter an IRQ mask. Edit:

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Pcmcia

Add Value name InterruptMask of type REG_DWORD and set the RADIX to Binary. Enter the 16 digit mask.

The InterruptMask is composed of a series of binary switches, 0 means the IRQ is available and 1 means the IRQ is unavailable. Here is an example for allowing IRQs 10, 9, and 3:

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
1 1 1 1 1 0 0 1 1 1 1 1 0 1 1 1


When you click Ok, the mask would appear as f9f7 in the right hand pane. Exit regedt32 and reboot.


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