Appeal No. 95-3498
Application 08/176,330
I/O boards for any type of peripheral device can be connected
into these slots.
We agree that Shah does not expressly teach that these
I/O boards contain only one of the type of I/O circuit (a
digital input circuit, a digital output circuit, an analog
input circuit and an analog output circuit). However, Shah
does suggest that the Shah system can connect any type of I/O
board for a partic-ular type peripheral device. We note that
there are many particular types of peripheral device that
would require only one type of I/O circuit. For instance,
audio speakers are a well- known peripheral device that only
require an analog output circuit and LED displays are another
well-known peripheral device that only require a digital
output circuit. A temperature probe is a well-known
peripheral device that only requires an analog input circuit
or a digital input circuit depending upon the type of probe.
Thus, we find that Shah would have suggested to those
skilled in the art to provide a I/O board to be connected into
one of the identical slots 20 that would only have a single
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