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Fig. 6.8
Image multiplexer
Fig. 6.9
Comparator for four priorities
Priorities' Magnitude Comparator
A magnitude comparator may be implemented using fm-to codes applied to a
toggle register, as suggested in a later chapter, but here is a design using random
logic. Priorities may be compared two at a time as in Fig.
6.9
.
This example involves four calculated priorities. Pairs of priority values are
compared in U1 and U2, which are comparison blocks. The true or false outputs of
these blocks are a
b or a
b and d
e or d
e. The symbols a
b or a
b
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