src/mainboard/asus/p2b-ds/devicetree.cb

chip northbridge/intel/i440bx		# Northbridge
  device cpu_cluster 0 on		# (L)APIC cluster
    chip cpu/intel/slot_1		# CPU socket 0
      device lapic 0 on end		# Local APIC of CPU 0
    end
    chip cpu/intel/slot_1		# CPU socket 1
      device lapic 1 on end		# Local APIC of CPU 1
    end
  end
  device domain 0 on		# PCI domain
    device pci 0.0 on end		# Host bridge
    device pci 1.0 on end		# PCI/AGP bridge
    chip southbridge/intel/i82371eb	# Southbridge
      device pci 4.0 on			# ISA bridge
        chip superio/winbond/w83977tf	# Super I/O
          device pnp 3f0.0 on		# Floppy
            io 0x60 = 0x3f0
            irq 0x70 = 6
            drq 0x74 = 2
          end
          device pnp 3f0.1 on		# Parallel port
            io 0x60 = 0x378
            irq 0x70 = 7
          end
          device pnp 3f0.2 on		# COM1
            io 0x60 = 0x3f8
            irq 0x70 = 4
          end
          device pnp 3f0.3 on		# COM2 / IR
            io 0x60 = 0x2f8
            irq 0x70 = 3
          end
          device pnp 3f0.5 on		# PS/2 keyboard / mouse
            io 0x60 = 0x60
            io 0x62 = 0x64
            irq 0x70 = 1		# PS/2 keyboard interrupt
            irq 0x72 = 12		# PS/2 mouse interrupt
          end
          device pnp 3f0.7 on		# GPIO 1
          end
          device pnp 3f0.8 on		# GPIO 2
          end
          device pnp 3f0.9 on		# GPIO 3
          end
          device pnp 3f0.a on		# ACPI
          end
        end
      end
      device pci 4.1 on	end		# IDE
      device pci 4.2 on	end		# USB
      device pci 4.3 on end		# ACPI
      device pci 6.0 on end		# Onboard SCSI
      register "ide0_enable" = "1"
      register "ide1_enable" = "1"
      register "ide_legacy_enable" = "1"
      # Enable UDMA/33 for higher speed if your IDE device(s) support it.
      register "ide0_drive0_udma33_enable" = "1"
      register "ide0_drive1_udma33_enable" = "1"
      register "ide1_drive0_udma33_enable" = "1"
      register "ide1_drive1_udma33_enable" = "1"
    end
  end
end