Products are needed to comply with a protocol so the interrupt-request (IRQ) strains can be shared. The PCI bus incorporates 4 interrupt strains, INTA# by INTD#, all of which can be found to every machine. Approximately eight PCI devices share precisely the same IRQ line (INTINA# by INTINH#) in APIC-enabled https://nathanlabsadvisory.com/3rd-party-security-audit-assessment/