HelenOS sources

PCI_DEVICE_ID     724 uspace/drv/bus/isa/isa.c 	rc = pci_config_space_read_16(sess, PCI_DEVICE_ID, &isa->pci_device_id);
PCI_DEVICE_ID     918 uspace/drv/bus/pci/pciintel/pci.c 	fun->device_id = pci_conf_read_16(fun, PCI_DEVICE_ID);
PCI_DEVICE_ID    2028 uspace/drv/nic/e1k/e1k.c 	rc = pci_config_space_read_16(ddf_dev_parent_sess_get(dev), PCI_DEVICE_ID,
PCI_DEVICE_ID     409 uspace/drv/nic/rtl8169/driver.c 	rc = pci_config_space_read_16(rtl8169->parent_sess, PCI_DEVICE_ID,
HelenOS homepage, sources at GitHub