Abstract: In a telecommunications or data processing system having at least one active control unit and at least one redundant passive control unit that are respectively provided with at least one memory unit, the following operations are performed: (a) a mirroring routine is invoked when a virtual memory region in a memory unit of an active control unit, having a memory content that is to be mirrored to a memory unit of the at least one redundant passive control unit, is accessed by writing; (b) during execution of the mirroring routine, the memory content to be written is copied into a memory region in the memory unit of the at least one redundant passive control unit; and (c) the writing access to the active control unit, which has led to the invocation of the mirroring routine, is repeated in the mirroring routine, on another virtual memory region that is imaged onto the same address as the memory region.

Abstract: The invention relates to a bus for a highly scalable multiprocessor system, to a redundant bus system that utilizes this bus, and to a method for transmitting information in this bus system. To guarantee an optimally high throughput of individual accesses onto a shared memory, the bus 3 consists of an address bus 4 and a data bus 5, which are operated logically independent of one another and which are functionally connected only via a common identifier. In this way, the dynamic holding of the address bus 4 and of the data bus 5 as well as the latencies are minimized.

Abstract: The present invention relates to a bus control unit for supporting data flow monitoring in a star topology, wherein an address comparator a target address, which is present at a bus interface, with a monitoring address area and deactivates an associated data processing unit connected to a monitoring bus interface and mirror-images the data stream to the monitoring bus interface if the target address which is present does not match the monitoring address area.