Gadgets are necessary to abide by a protocol so which the interrupt-ask for (IRQ) strains is often shared. The PCI bus contains 4 interrupt traces, INTA# as a result of INTD#, all of which are available to each device. Nearly eight PCI devices share exactly the same IRQ line (INTINA# https://nathanlabsadvisory.com/iso-iec-19770-1-2017-it-asset-management/