Уточнение по формату адресного регистра контроллера PCI В

Port CFB-CF8 - Configuration Address ......................... RW
31 Configuration Space Enable
0 Disabled .................................................default
1 Convert configuration data port writes to
configuration cycles on the PCI bus
30-24 Reserved ........................................ always reads 0

23-16 PCI Bus Number
Used to choose a specific PCI bus in the system
15-11 Device Number
Used to choose a specific device in the system
10-8 Function Number
Used to choose a specific function if the selected
device supports multiple functions
7-2 Register Number
Used to select a specific DWORD in the device’s
configuration space
1-0 Fixed ........................................ always reads 0