Equipment are necessary to comply with a protocol so which the interrupt-ask for (IRQ) lines may be shared. The PCI bus contains four interrupt strains, INTA# by way of INTD#, all of which are available to each gadget. Approximately eight PCI equipment share a similar IRQ line (INTINA# via INTINH#) https://nathanlabsadvisory.com/cybersecurity-fintechs/