Equipment are necessary to abide by a protocol so that the interrupt-request (IRQ) strains may be shared. The PCI bus features four interrupt traces, INTA# as a result of INTD#, all of which can be found to every device. Around 8 PCI equipment share the exact same IRQ line (INTINA# https://nathanlabsadvisory.com/iso-27701-privacy-information-management-system-pims/