Equipment are required to observe a protocol so the interrupt-ask for (IRQ) lines is usually shared. The PCI bus involves 4 interrupt strains, INTA# via INTD#, all of which are offered to each product. As much as 8 PCI products share the exact same IRQ line (INTINA# through INTINH#) in https://nathanlabsadvisory.com/business-process-re-engineering/