Hello, the L4 reference manual mentions IO-fpages. Has a L4 task its own IO address space containing IO-fpages, or maps L4 the IO-fpages into the user memory? It is said that always the complete IO space should be specified as receive fpage, why? Thanks, Christian -- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Christian Stueble............stueble@ls6.cs.uni-dortmund.de PubKey[BF7104F5].......fp=8678C5D3CAD9CD8C F1DDB8EC202F116A To be or not to be is true... (apocrypha of George Boole) -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-