BUS_DATA_TYPE - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers
#ifndef _NTIOAPI_H

typedef enum _BUS_DATA_TYPE
{
    ConfigurationSpaceUndefined = -1,
    Cmos,
    EisaConfiguration,
    Pos,
    CbusConfiguration,
    PCIConfiguration,
    VMEConfiguration,
    NuBusConfiguration,
    PCMCIAConfiguration,
    MPIConfiguration,
    MPSAConfiguration,
    PNPISAConfiguration,
    SgiInternalConfiguration,
    MaximumBusDataType
} BUS_DATA_TYPE, *PBUS_DATA_TYPE;

#endif

View code on GitHub

This enumeration is documented in Windows Driver Kit.