Products are needed to adhere to a protocol so the interrupt-request (IRQ) strains is usually shared. The PCI bus consists of 4 interrupt traces, INTA# by way of INTD#, all of which can be found to every unit. Approximately eight PCI equipment share the identical IRQ line (INTINA# by INTINH#) https://nathanlabsadvisory.com/cyber-security-policy-review/