0 = Internal
6 = VME Bus
12 = Internal Processor
1 = ISA
7 = NuBus
13 = Internal Power Bus
2 = EISA
8 = PCMCIA Bus
14 = PNP ISA Bus
3 = MicroChannel
9 = C Bus
15 = PNP Bus
4= TurboChannel
10 = MPI Bus
16= Maximum Interface Type
5 = PCI Bus
11 = MPSA Bus