Devices are needed to stick to a protocol so which the interrupt-request (IRQ) strains is often shared. The PCI bus involves 4 interrupt traces, INTA# through INTD#, all of which are offered to each machine. As many as eight PCI products share the identical IRQ line (INTINA# via INTINH#) in https://nathanlabsadvisory.com/supply-chain-security/