Products are necessary to comply with a protocol so that the interrupt-ask for (IRQ) lines might be shared. The PCI bus includes four interrupt lines, INTA# by way of INTD#, all of which are offered to every device. Around 8 PCI gadgets share the identical IRQ line (INTINA# by INTINH#) https://nathanlabsadvisory.com/achieve-hitrust-compliance-in-the-usa-to-protect-sensitive-health-information/