_PCI_BUSMASTER_DESCRIPTOR

//0xc bytes (sizeof) struct _PCI_BUSMASTER_DESCRIPTOR { enum _PCI_BUSMASTER_RID_TYPE Type; //0x0 ULONG Segment; //0x4 union { struct { UCHAR Bus; //0x8 UCHAR Device; //0x9 UCHAR Function; //0xa UCHAR Reserved; //0xb } DeviceRid; //0x8 struct { UCHAR Bus; //0x8 UCHAR Device; //0x9 UCHAR Function; //0xa UCHAR Reserved; //0xb } BridgeRid; //0x8 struct { UCHAR SecondaryBus; //0x8 UCHAR SubordinateBus; //0x9 } MultipleBridges; //0x8 }; };