Inter and intra priority resolution network for an asynchronous bus system

Abstract From the Canadian patent

A data processing system includes a plurality of units including a bus interface unit (BIU) each of, which couple in common to different positions along an asynchronous common bus. The BIU couples to a plurality of local units which connect to a high speed local bus. The asynchronous common system bus includes a distributed tie-breaking priority which consists of a plurality of like priority network sections. The BIU includes a priority resolver which incorporated the priority network section having the highest priority access to the asynchronous bus. The priority resolver includes a local priority resolver circuit for resolving priorities between local requesters within a minimum amount of …