Gadgets are needed to abide by a protocol so the interrupt-request (IRQ) lines is usually shared. The PCI bus features 4 interrupt strains, INTA# by means of INTD#, all of which can be found to every device. As much as 8 PCI equipment share the exact same IRQ line (INTINA# https://nathanlabsadvisory.com/merging-token-companies/