Equipment are necessary to stick to a protocol so that the interrupt-ask for (IRQ) traces might be shared. The PCI bus incorporates 4 interrupt traces, INTA# by means of INTD#, all of which can be found to each unit. Approximately 8 PCI equipment share a similar IRQ line (INTINA# by https://nathanlabsadvisory.com/ensure-data-privacy-and-security-with-hipaa-compliance-services-in-the-usa/