Appeal No. 1999-2747
Application 08/757,979
array.
The final subparagraph of this claim reads: "storing to
and retrieving data from remaining portions of the array,
wherein the step of setting a flag comprises setting a set
invalid bit in a flag field of a line in the storage array."
Lefsky discloses that his system maps out defective cache11
cells so that operation of the rest of the cache system can
continue, and that the output enable means suppresses a cache12
cell output when the force bit is set so that as long as one
cache cell in each set of the cache memory remains
operational, the system can continue operation. Furthermore,
the force bit is clearly the set invalid bit in a flag field
of a line in the storage array of Lefsky.
Therefore, upon considering Lefsky as a whole, we find
that Lefsky discloses all of the limitations of claim 20. As
we have found above that Lefsky, discloses all the limitations
of claim 20, this claim is obvious over Lefsky. "[A]
disclosure that anticipates under Section 102 also renders the
11Column 12, lines 65-67.
12Column 3, lines 9-24.
10
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