Callgate method for telephone installation software system

摘要

The callgate method is used for a software system with a number of sub-systems, with a vector table in the form of a pointer array provided as a sub-system, each of the vectors defining the source address of a function which can be called up during the programme execution of one or more other sub-systems. A macro-list is provided for the software system, allowing each function to be replaced by a vector table source address, with the sub-systems connected and the vector table copied into the working memory of the processor executing the programme.