src/mainboard/asus/p2b/variants/p2b-d/overridetree.cb

chip northbridge/intel/i440bx		# Northbridge
  device cpu_cluster 0 on		# (L)APIC cluster
  end
  device domain 0 on		# PCI domain
    chip southbridge/intel/i82371eb	# Southbridge
      device pci 4.0 on			# ISA bridge
        chip superio/winbond/w83977tf	# Super I/O
          device pnp 3f0.9 on		# GPIO 3
          end
          device pnp 3f0.a on		# ACPI
          end
        end
      end
    end
  end
end