func: static int piix4_initfn(PCIDevice *dev)
  
  {
  
      PIIX4State *d = DO_UPCAST(PIIX4State, dev, dev);
  
      uint8_t *pci_conf;
  
  
  
      isa_bus_new(&d->dev.qdev);
  
  
  
      pci_conf = d->dev.config;
  
      pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_INTEL);
  
      pci_config_set_device_id(pci_conf, PCI_DEVICE_ID_INTEL_82371AB_0); // 82371AB/EB/MB PIIX4 PCI-to-ISA bridge
  
      pci_config_set_class(pci_conf, PCI_CLASS_BRIDGE_ISA);
  
  
  
      piix4_dev = &d->dev;
  
      qemu_register_reset(piix4_reset, d);
  
      return 0;
  
  }
  