Products are required to adhere to a protocol so the interrupt-ask for (IRQ) traces is usually shared. The PCI bus incorporates 4 interrupt traces, INTA# as a result of INTD#, all of which can be obtained to every unit. As much as 8 PCI gadgets share the exact same IRQ https://nathanlabsadvisory.com/navigating-cybersecurity-and-risk-management/