Equipment are required to abide by a protocol so that the interrupt-request (IRQ) strains is usually shared. The PCI bus includes four interrupt strains, INTA# by INTD#, all of which are available to each device. Nearly 8 PCI equipment share exactly the same IRQ line (INTINA# through INTINH#) in APIC-enabled https://nathanlabsadvisory.com/data-protection-officer-service-virtual-dpo/