Gadgets are necessary to follow a protocol so that the interrupt-ask for (IRQ) traces is usually shared. The PCI bus incorporates 4 interrupt strains, INTA# as a result of INTD#, all of which can be found to each machine. Nearly eight PCI units share the exact same IRQ line (INTINA# https://nathanlabsadvisory.com/nist-800-cyber-security-frame-work/