Devices are necessary to stick to a protocol so that the interrupt-request (IRQ) strains could be shared. The PCI bus consists of 4 interrupt lines, INTA# via INTD#, all of which can be obtained to every gadget. Around eight PCI products share exactly the same IRQ line (INTINA# as a https://nathanlabsadvisory.com/iso-iec-19770-1-2017-it-asset-management/