Devices are necessary to stick to a protocol so which the interrupt-ask for (IRQ) strains may be shared. The PCI bus consists of 4 interrupt lines, INTA# by INTD#, all of which can be obtained to each gadget. As much as 8 PCI units share precisely the same IRQ line https://nathanlabsadvisory.com/how-nist-800-171-compliance-consulting-in-usa-can-secure-your-business-data/