Bus system having a system bus, an internal bus with functional units coupled therebetween and a logic unit for use in such system

摘要

A bus system has a main bus and an internal bus. The main bus is coupled to a number of driver units which drive data onto the main bus and to receiver units which respond to that data and provide response data to the main bus. A logic unit provides two-way communication directly between the main and internal buses and allows testing of individual driver and receiver units independently of other units.