Products are necessary to comply with a protocol so that the interrupt-ask for (IRQ) strains is usually shared. The PCI bus consists of four interrupt strains, INTA# by INTD#, all of which are offered to each unit. Around 8 PCI products share a similar IRQ line (INTINA# by INTINH#) in https://nathanlabsadvisory.com/swift-csp-assessments/