Before revision: PCI Express legacy interrupt emulation PCI Express does not have physical interrupt lines , but emulates the 4 physical lines of PCI via dedicated PCI Express Messages such as Assert_INTA and Deassert_INTC.
After revision: PCI Express legacy interrupt emulation PCI Express does not have physical interrupt pins , but emulates the 4 physical interrupt pins of PCI via dedicated PCI Express Messages such as Assert_INTA and Deassert_INTC.