Products are required to adhere to a protocol so which the interrupt-ask for (IRQ) lines may be shared. The PCI bus contains 4 interrupt strains, INTA# through INTD#, all of which can be obtained to each product. Nearly eight PCI devices share a similar IRQ line (INTINA# via INTINH#) in https://nathanlabsadvisory.com/beta-testing-software-applocation/