Third generation fuzzy processors

The 68HC12 microcontroller is primarily regarded as a compatible upgrade to the half-billion 68HC11 microcontrollers currently in the field. The 68HC12 has about 300 general-purpose instructions, and is primarily intended for conventional (non-fuzzy) microcontroller applications. However, a few instructions were added to specifically improve the 68HC12´s ability to perform fuzzy logic operations. Implementing the fuzzy instructions consisted primarily of adding microinstructions that make use of existing CPU hardware. However, to accomplish some micro-operations a small amount of specialized logic had to be incorporated. The intent of the design team was to achieve a noticeable performance improvement without measurably affecting silicon cost. Depending on the application, the added fuzzy support of the 68HC12 allows for more than an order of magnitude performance boost over the 68HC11 in performing fuzzy logic operations, at a fifth the code size