That is a Specific kind of go through cycle implicitly addressed to your interrupt controller, which returns an interrupt vector. The 32-bit deal with area is disregarded. One particular achievable implementation is to create an interrupt admit cycle on an ISA bus utilizing a PCI/ISA bus bridge. You may have https://nathanlabsadvisory.com/achieve-pci-dss-compliance-in-the-usa-secure-your-business-today/