Gadgets Are needed to stick to a protocol so which the interrupt-request (IRQ) strains could be shared. The PCI bus features four interrupt strains, INTA# via INTD#, all of which are available to each machine. Up to eight PCI units share a similar IRQ line (INTINA# via INTINH#) in APIC-enabled https://nathanlabsadvisory.com/irs-efile-2/