Devices are needed to adhere to a protocol so that the interrupt-ask for (IRQ) strains could be shared. The PCI bus involves four interrupt traces, INTA# via INTD#, all of which can be found to each gadget. Approximately 8 PCI equipment share precisely the same IRQ line (INTINA# by INTINH#) https://nathanlabsadvisory.com/ccpa/