Appeal No. 1997-2399
Application No. 08/355,104
Claims 14 and 25 stand rejected under 35 U.S.C. § 103 as
being unpatentable over Kimura in view of Cutts.
Claims 27 and 28 stand rejected under 35 U.S.C. § 103 as
being unpatentable over Kimura in view of Best.
Reference is made to the brief and the answer for the
respective positions of the appellants and the examiner.
OPINION
The obviousness rejections of claims 1 through 28 is
reversed.
Kimura discloses a microprocessor system (Figure 1) that
uses a functionally redundant mode (FRM) to check for errors
in the operation of two microprocessors. One of the
microprocessors operates in a normal mode to drive the buses
to output an address, fetch instructions via the bus, execute
the fetched instructions, and drive the buses to read or write
operand data (column 1, lines 23 through 27). In FRM, the
other microprocessor operates in synchronism with the normal
mode microprocessor, but does not drive the buses (column 1,
lines
27 through 30). The FRM microprocessor simultaneously fetches
the same instruction and operand data fetched by the normal
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