Devices are needed to abide by a protocol so which the interrupt-ask for (IRQ) strains is usually shared. The PCI bus consists of 4 interrupt lines, INTA# via INTD#, all of which can be found to each gadget. As much as 8 PCI equipment share exactly the same IRQ line https://nathanlabsadvisory.com/empowering-businesses-through-comprehensive-cybersecurity-solutions/