HelenOS sources

PCI_SUB_CLASS     730 uspace/drv/bus/isa/isa.c 	rc = pci_config_space_read_8(sess, PCI_SUB_CLASS, &isa->pci_subclass);
PCI_SUB_CLASS     926 uspace/drv/bus/pci/pciintel/pci.c 	fun->subclass_code = pci_conf_read_8(fun, PCI_SUB_CLASS);