Source : Free On-Line Dictionary of Computing

320xx
     
         A series of {microprocessors} from {National
        Semiconductor}.  The 320xx processors have a {coprocessor}
        interface which allows coprocessors such as {FPU}s and {MMU}s
        to be attached in a chain.
     
        The 320xx was the predecessor of the {Swordfish} processor.
     
        [Details?]
     
        (1994-11-17)