Equipment Are necessary to follow a protocol so the interrupt-ask for (IRQ) traces can be shared. The PCI bus incorporates 4 interrupt traces, INTA# through INTD#, all of which are available to every unit. Approximately eight PCI gadgets share the exact same IRQ line (INTINA# as a result of INTINH#) https://nathanlabsadvisory.com/ciso-service/