Devices are required to comply with a protocol so which the interrupt-ask for (IRQ) strains may be shared. The PCI bus incorporates four interrupt traces, INTA# by INTD#, all of which are offered to each unit. Around eight PCI products share the same IRQ line (INTINA# via INTINH#) in APIC-enabled https://nathanlabsadvisory.com/maximize-business-trust-and-security-with-hitrust-compliance/