Appeal No. 1997-4350 Page 4
Application No. 08/574,848
Independent claim 4 requires, inter alia, that there be “a
duplicate tag store, coupled directly to the input/output bus,
having duplicates of the main memory addresses contained in the
CPU cache tag store” [emphasis ours].
The examiner applies Milia to claim 4, identifying
elements of Milia as corresponding to various claimed elements,
as set forth at page 3 of the answer. The examiner notes that
Milia does not explicitly teach the data processing system
comprising a CPU for processing data, a duplicate tag store
connected to the I/O bus, and a plurality of I/O devices. The
examiner contends that it would have been obvious that the data
processing system of Milia does comprise a CPU “in order to
function properly” and an I/O bus in order to connect all I/O
devices such as a keyboard, a mouse, a printer, etc. because
these components are basic to conventional data processing
systems. We agree with this much of the examiner’s analysis.
However, the examiner then relies on Hartwell for the
teaching of connecting an I/O unit directly to a system bus
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