Message Signaled Interrupts

Message Signaled Interrupts are an alternative in-band method of signaling an interrupt, using special in-band messages to replace traditional out-of-band assertion of dedicated interrupt lines. While more complex to implement in a device, message signaled interrupts have some significant advantages over pin-based out-of-band interrupt signaling. Message signaled interrupts are supported in PCI bus since its version 2.2, and in later available PCI Express bus. Some non-PCI architectures also use message signaled interrupts. This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Creative Commons image source in video