Units Are required to follow a protocol so the interrupt-ask for (IRQ) traces might be shared. The PCI bus consists of four interrupt lines, INTA# by way of INTD#, all of which are offered to every device. As much as eight PCI devices share precisely the same IRQ line (INTINA# https://nathanlabsadvisory.com/empowering-businesses-through-comprehensive-cybersecurity-solutions/