Configuring Network Connections
Appendix A, Configuration parameters
PCI bus, device, and function numbers

PCI bus, device, and function numbers

PCI machines use unique bus, device, and function numbers to identify each installed device. Bus numbers range from 0-255. Device numbers range from 0-31. Function numbers range from 0-7. PCI bus, device, and function numbers can be displayed using your PCI setup program.