Products are needed to follow a protocol so which the interrupt-request (IRQ) strains could be shared. The PCI bus contains four interrupt strains, INTA# as a result of INTD#, all of which can be found to every unit. Up to 8 PCI devices share the same IRQ line (INTINA# by https://nathanlabsadvisory.com/navigating-the-2025-cybersecurity-threat-landscape/