Devices are needed to adhere to a protocol so the interrupt-ask for (IRQ) strains is often shared. The PCI bus involves 4 interrupt traces, INTA# by means of INTD#, all of which are offered to each device. As many as 8 PCI units share the identical IRQ line (INTINA# as https://nathanlabsadvisory.com/iso-44001-collaborative-business-relationship-management-systems/