Appeal No. 1997-3911
Application 08/368,758
one skilled in the art would have replaced the non-volatile
storage provided by Yamaguchi's PROM 6 with volatile RAM
storage that would require initialization every time the
microcomputer is activated. If the PROM is replaced by a RAM,
where would the data required for initializing the RAM be
stored?
The rejection of claim 14 based on Yamaguchi in view of
Patrick is therefore reversed, as is the rejection of
dependent claims 15-20, 22, and 23 over those references.
The rejection based on Denki
Denki's invention, like appellants', is concerned with
correcting errors or bugs in the programming commands stored
in the ROM (1) of a mass-produced microcomputer without
requiring replacement of the ROM (Transl. at 3-4). In Denki's
system, the correct commands are stored in a substitute
command register 5 (transl. at 5). An address comparing
circuit 4 compares the addresses generated by microaddress
controller circuit 3 to the addresses stored in address
comparing circuit 4, which represent the addresses of the
erroneous instructions in the ROM (Transl. at 4-5). The
commands read out of the ROM are stored in microcommand
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