This can be a Specific sort of examine cycle implicitly dealt with to the interrupt controller, which returns an interrupt vector. The 32-little bit handle industry is disregarded. A person achievable implementation will be to crank out an interrupt accept cycle on an ISA bus utilizing a PCI/ISA bus bridge. https://nathanlabsadvisory.com/how-soc-2-compliance-protects-your-usa-business-from-cyber-attacks/