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Function RTT_BIOS_FindClassCode

This function returns the location of PCI devices which have a specific class code.

int RTT_BIOS_FindClassCode(DWORD  ClassCode, 
                           int    Index, 
                           BYTE * Bus, 
                           BYTE * DeviceFunc);

Parameters

ClassCode

Class code to search for.

Index

Zero-based index of the device. For example, Index 1 would return the second device with the given class code.

Bus

Pointer to the returned bus number.

DeviceFunc

Pointer to the returned device number in bits 7 .. 3 and the function number in bits 2 .. 0.

return value

RTT_BIOS_SUCCESSFUL or an error code, see section PCI BIOS.

All devices having the same class code can be found by making successive calls to this function starting with Index set to zero and incrementing it until the return code is RTT_BIOS_DEVICE_NOT_FOUND.

PCI BIOS

Function RTT_BIOS_FindDevice

Function RTT_BIOS_GetInterruptRouting