Devices are required to comply with a protocol so which the interrupt-request (IRQ) lines is often shared. The PCI bus includes four interrupt lines, INTA# via INTD#, all of which can be found to each product. Nearly 8 PCI equipment share exactly the same IRQ line (INTINA# via INTINH#) in https://nathanlabsadvisory.com/aramco-cyber-security-compliance/