FindPCI, authored by Harry Bates, will search for all installed PCI adapters on your Windows computer,
even if the device is NOT present.
When you type FindPCI /?, the following help is displayed:

NOTE: This utility changes the parameters to upper case. If you used the /R= switch, the invoked program will receive upper case parameters.
NOTE: FindPCI recursively parses HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\PCI.
NOTE: See FindNIC.
NOTE: See FindPCMCIA.