Devices Are necessary to abide by a protocol so that the interrupt-ask for (IRQ) strains may be shared. The PCI bus involves 4 interrupt strains, INTA# as a result of INTD#, all of which are offered to each gadget. Approximately eight PCI gadgets share the exact same IRQ line (INTINA# https://nathanlabsadvisory.com/iot-testing-in-the-usa-protect-your-devices-from-cyber-threats/