Patent ID: 7167939

Claim:
A computer system, said computer system comprising: a global bus; at least one system device coupled to said global bus; a local bus; at least one local device coupled to said local bus; and an asynchronous system bus adapter, said asynchronous system bus adapter coupled between said global bus and said local bus; wherein said asynchronous system bus adapter further comprises: a local bus adapter coupled between said global bus and said local bus, said local bus adapter handling transactions, initiated by one of said at least one system device, that require access to one of said at least one local device; and a global bus adapter coupled between said local bus and said global bus, said global bus adapter handling transactions, initiated by one of said at least one local device, that require access to one of said at least one system device, wherein said local bus adapter is coupled to said global bus adapter, said local bus adapter issuing a signal, to said global bus adapter, which prevents said global bus adapter from handling transactions, initiated by one of said at least one local device, that require access to one of said at least one system device while transactions, initiated by one of said at least one system device, that require access to one of said at least one local device are on-going.