Products are needed to follow a protocol so that the interrupt-request (IRQ) lines might be shared. The PCI bus features 4 interrupt strains, INTA# via INTD#, all of which can be obtained to every gadget. Approximately 8 PCI equipment share a similar IRQ line (INTINA# as a result of INTINH#) https://nathanlabsadvisory.com/business-process-re-engineering/