Units Are necessary to abide by a protocol so the interrupt-request (IRQ) traces is often shared. The PCI bus includes four interrupt strains, INTA# by INTD#, all of which can be obtained to each device. Nearly 8 PCI products share the exact same IRQ line (INTINA# by INTINH#) in APIC-enabled https://nathanlabsadvisory.com/rbi-cyber-security-framework/