Equipment are necessary to stick to a protocol so that the interrupt-ask for (IRQ) lines may be shared. The PCI bus consists of 4 interrupt traces, INTA# via INTD#, all of which are offered to each gadget. As much as eight PCI equipment share the exact same IRQ line (INTINA# https://nathanlabsadvisory.com/the-top-benefits-of-using-ciso-as-a-service/