Gadgets are necessary to adhere to a protocol so the interrupt-ask for (IRQ) lines can be shared. The PCI bus incorporates four interrupt traces, INTA# as a result of INTD#, all of which can be found to every machine. Approximately 8 PCI devices share precisely the same IRQ line (INTINA# https://nathanlabsadvisory.com/hipaa-hitech-compliance/